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Mazda Rotary Club

Cars by Model Type => RX-8's => Topic started by: Paul_13 on September 01, 2018, 01:26:46 PM

Title: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 01, 2018, 01:26:46 PM
Afternoon all.
Thought I'd start a project thread on my project car at the moment, it's a mx-5 nc 20th anniversary originally a 1.8l but a stroke of madness struck and bought a very rusty RX-8 for the engine.
I'll post more over the next couple of days
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 01, 2018, 01:27:52 PM
Picture of rx8 engine in
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 01, 2018, 01:56:26 PM
Propshaft end was a direct swap. The ppf I ended up making an adapter plate for, bottom bolts line up perfectly with propshaft centreline.
PPF is now bolted up and the propshaft is in! (https://uploads.tapatalk-cdn.com/20180901/bd239161f614d84361b67d3c2d8f9610.jpg)(https://uploads.tapatalk-cdn.com/20180901/6efd2c5149ffd36e975a7fe27649cc8f.jpg)(https://uploads.tapatalk-cdn.com/20180901/b0b90236647588716ff598cabb1f69b7.jpg)(https://uploads.tapatalk-cdn.com/20180901/169374e8aa92f87090a166cb6ed05db6.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 01, 2018, 02:01:26 PM
Happy days good progress.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 01, 2018, 02:07:15 PM
Luckily the car was a cat c and all of the airbags had blown. All of the wires in the pile are redundant so far, stripped out air bags, amp and a few other bits of wiring. Got to do the 2 dash one next.
Also found a way of extinguishing the air bag light! (https://uploads.tapatalk-cdn.com/20180901/deab0663687fdd598d11bdc4d26806e6.jpg)(https://uploads.tapatalk-cdn.com/20180901/fca33b2192934eaf921f33bb4ba51c78.jpg)(https://uploads.tapatalk-cdn.com/20180901/25bac8c5efba44acd2da007d9ccc56b5.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: re japi on September 01, 2018, 02:28:50 PM
Awesome! This project I really want to follow!

Lähetetty minun E2303 laitteesta Tapatalkilla

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 01, 2018, 06:02:42 PM
First up  :welcome: to Mazda Rotary club

Good project and as you probably know the RX-8 and the NC share the same floor pan. The NC was very nearly a Rotary anyway and it went as far as Mazda Germany having demonstrators before the final piston or Rotary decision was taken.

Few of these conversions have been done and Jon (Boosted) sorted a race car version a while back.

We look forward to seeing it up and running as a  Rotary  :)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 01, 2018, 06:10:49 PM
Thanks for the kind words. I have already spoken with Jon on the phone who directed me here.

Only thing I'm struggling with is wiring at the moment, I can only find US spec diagrams. Stupidly I cut a section of wires out to lengthen the ABS plug (using rx8 abs pump) abs didn't anticipate needing the car loom...

I believe the wiring diagrams are on here somewhere but it won't let me access the link. I've paid to be a full member but unsure if it's been validated.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 01, 2018, 06:28:41 PM
May take a day or 2 to update membership...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 01, 2018, 06:35:35 PM
I did it about 2 weeks ago and realised I paid again last night by mistake. Hopefully one lot of payments come out.



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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 01, 2018, 06:39:04 PM
I did think it was free tbh...
Pm Clive he will take alook and sort for you.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 01, 2018, 08:07:08 PM
Hello Paul,
Thank you for becoming a club member, I will get your access changed tomorrow and also get the payment thing looked into for you   
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 01, 2018, 08:24:57 PM
Quote from: clive on September 01, 2018, 08:07:08 PM
Hello Paul,
Thank you for becoming a club member, I will get your access changed tomorrow and also get the payment thing looked into for you
Thanks, much appreciated

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 01, 2018, 09:48:38 PM
Any body know what these green plugs are for? I'm currently 20 miles away from the donor car and I can't go and check. Thanks in advance! Rx8 231 dash loom if that helps(https://uploads.tapatalk-cdn.com/20180901/43a9c4cbafa0a1af67ac34195a8366c3.jpg)(https://uploads.tapatalk-cdn.com/20180901/1751cf2bc003a29613cfc6f0a1b57cb8.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 01, 2018, 10:16:03 PM
I dont know sorry...would need to fire up laptop and look at drawings.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 02, 2018, 11:35:33 AM
They are not out of the back of the dash as these are two white plugs so I think its probably one you wont need.

(Hopefully Malcolm will be along later to sort out changing your access)   
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 02, 2018, 04:32:46 PM
Only thing that springs to mind is the plugs are for sat nav modules /screen

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 04, 2018, 09:14:02 PM
RX-8 uprights fitted and brakes back on.
Do people recommend fitting the front rx8 arb? Or is it overkill?

Cat is asking when race car will be done? (https://uploads.tapatalk-cdn.com/20180904/be523c735727d2d3c515d219ff6d910d.jpg)(https://uploads.tapatalk-cdn.com/20180904/3aac847a9836bf7160458fcf81cb1558.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 04, 2018, 09:38:16 PM
Next job is to swap the ABS pump for the rx8 item.
Still can't believe how much room there is down the back! (https://uploads.tapatalk-cdn.com/20180904/e161d787e4bc4099bdb3bee574273258.jpg)(https://uploads.tapatalk-cdn.com/20180904/b410529c30894e9db67ba7f287a5109d.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 04, 2018, 10:32:56 PM
Quote from: Paul_13 on September 04, 2018, 09:14:02 PM
Do people recommend fitting the front rx8 arb? Or is it overkill?

NC bars are very soft, yes just the RX-8 bar will be an upgrade but fit the rear as well, both are direct swaps 
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 04, 2018, 10:42:33 PM
Rear is already fitted

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 05, 2018, 06:33:31 AM
Ive heard rx8 antiroll bars are a good mod on an nc.
Nice cat!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 05, 2018, 10:16:56 PM
Front arb fitted with these bushes :) (https://uploads.tapatalk-cdn.com/20180905/d7574abaff6c0dcfa0c3add3e0c82d40.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 06, 2018, 10:09:00 PM
Loosely fitted engine bay loom however mother nature does not want me working on my car tonight!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 07, 2018, 09:34:24 PM
Fuse board box fixed and back together :) (https://uploads.tapatalk-cdn.com/20180907/130ee12fbe92b9be58d111450bf0134a.jpg)(https://uploads.tapatalk-cdn.com/20180907/b92f9f3971dabc253aad6728897f8e58.jpg)(https://uploads.tapatalk-cdn.com/20180907/26e7ff71b90c61e08422bf1e7b6efbe5.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 07, 2018, 10:06:15 PM
Could someone validate my account please for paid membership

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 07, 2018, 10:09:44 PM
Certainly cracking on with it.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 08, 2018, 04:47:34 PM
Quote from: Paul_13 on September 07, 2018, 10:06:15 PM
Could someone validate my account please for paid membership

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Hi Chris (Paul)

Account now validated, sorry for the delay
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 08, 2018, 05:49:05 PM
Quote from: clive on September 08, 2018, 04:47:34 PM
Quote from: Paul_13 on September 07, 2018, 10:06:15 PM
Could someone validate my account please for paid membership

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Hi Chris (Paul)

Account now validated, sorry for the delay
:D I blame my mother for that

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 08, 2018, 06:28:47 PM
More progress, steering ecu and relays in place as well as engine ecu. Water pipes getting there as well. Real struggle to remember where everything goes! Photos only show so much(https://uploads.tapatalk-cdn.com/20180908/9402f0d4aa6eac73a179346a34371e4a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 08, 2018, 07:07:26 PM
I've taken the mx5 abs pump out and will be putting the rx8 item in but slightly relocated.
Annoyingly I've got to get the abs working due to the new mot regs (https://uploads.tapatalk-cdn.com/20180908/44f6d35f01bdcf9358655d90f47cfb96.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 09, 2018, 11:06:34 PM
Mounted battery box after a bit of jiggling other bits about. Just fits and leads reach ad well! Expansion tank is loose at the moment.
That's enough for tonight before I piss off the neighbours and I've got work tomorrow! (https://uploads.tapatalk-cdn.com/20180909/80a4619646e0899cc41d4286063bc9e7.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 09, 2018, 11:07:58 PM
Planning on running an alloy pipe straight out of Tb into a 90' in front of front panel. Similar to what I had on here before with mx5 engine(https://uploads.tapatalk-cdn.com/20180909/74fd93ae913dc8d6aa4df40003a65217.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 10, 2018, 10:03:19 AM
The rx8 air box system is prbably best you can get i think its only the Aem that actually has a positive effect and its only small. In the Rx8 system youll find x2 grids..round guaze things these are actually air straightners and help with idle control and allow the maf to get acurant readings...ideally need to run at least 1. Early days of Westfield got a few maf and running lean codes to i fitted an air straightner back in.
The rate your going will be fire up soon.
What you doing with the fuel system?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 10, 2018, 01:53:00 PM
Ok thanks for the heads up.
I looked up the mx5 fuel pump rating and its 4bar so no need to change!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 10, 2018, 01:55:09 PM
Cool yep i remember now...flow rate will the pump keep up with the rennys thirst?  Whats the lph rating of the 2 compared?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 16, 2018, 06:18:32 PM
Anymore updates? They were coming thick n fast !

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 06:21:39 PM
Oh yes, just haven't got round to it yet

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 16, 2018, 06:23:43 PM
Brill.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 06:24:39 PM
It's been my 30th birthday over the weekend and my wife had this cake made. Very accurate representation of my mx5 currently (https://uploads.tapatalk-cdn.com/20180916/445ba7601b5c2004696d91db7487684f.jpg)(https://uploads.tapatalk-cdn.com/20180916/2a3711a7ba67c896cd6414e77ec53ab4.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 16, 2018, 06:29:21 PM
She has skills! Seems a shame to cut into it.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 16, 2018, 06:33:08 PM
This is my mx5 (eunos s spec mk1).(https://uploads.tapatalk-cdn.com/20180916/be5f9bddefa71434ef983d1b6562ed77.jpg)(https://uploads.tapatalk-cdn.com/20180916/28ee90c2122f330879704f6303b54372.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 06:45:40 PM
Quote from: boosted on September 16, 2018, 06:33:08 PM
This is my mx5 (eunos s spec mk1).(https://uploads.tapatalk-cdn.com/20180916/be5f9bddefa71434ef983d1b6562ed77.jpg)(https://uploads.tapatalk-cdn.com/20180916/28ee90c2122f330879704f6303b54372.jpg)

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Tidy looking!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 06:47:57 PM
Just small wins but they seem to take the longest! Steering rack is on.
Expansion bottle is mounted. Battery box lid trimmed back.
Coolant hoses mostly refitted. Got to clip the one which goes over the exhaust tunnel.
Radiator, oil cooler and ABS pump next(https://uploads.tapatalk-cdn.com/20180916/80c6fb47cdccd0c9edfaff39986eea65.jpg)(https://uploads.tapatalk-cdn.com/20180916/757f9ffa8626e89d3e8f0fa1da613b04.jpg)(https://uploads.tapatalk-cdn.com/20180916/2cb995e8deb644003805abc4da09a250.jpg)(https://uploads.tapatalk-cdn.com/20180916/5c3ed729607199959ab685497eda5ffd.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 16, 2018, 06:51:28 PM
That small hose tail fitting on top of rad to expansion bottle  can get brittle over time worth being gentle with it when fitting hose on.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 06:55:58 PM
Cool cheers, need to have another look at rad and see if it's use able

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 07:00:49 PM
Quote from: boosted on September 10, 2018, 01:55:09 PM
Cool yep i remember now...flow rate will the pump keep up with the rennys thirst?  Whats the lph rating of the 2 compared?

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Need to double check in Haynes manual what the mx5 is, I know it states pressure, just can't remember seeing flow rate. The Internet is a murky place trying to find this information! Any one have rx8 fuel pump specs to hand?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 16, 2018, 07:07:39 PM
And whilst room..give the steering UJ a good soaking in pentrating oil...they can cease up give centreing issues .

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 07:14:43 PM
Cool, luckily this has had a replacement at some point, had history in the rx8 book.
Although I'll probably have to use the mx5 steering rack. Same fitment.

What's the life span of d585 coils and magna core Ht leads?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 16, 2018, 07:20:30 PM
They are supposed tobe fit and forget...but there have been failures so the jury is still out on them tbh. If they came from Rotary Revs they will have lifetime warranty...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 16, 2018, 07:21:06 PM
The leads are prob best you can get..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 07:24:12 PM
Cool, and the Ht leads?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 07:24:44 PM
Quote from: boosted on September 16, 2018, 07:21:06 PM
The leads are prob best you can get..

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Sorry only just seen this

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 08:09:27 PM
Quote from: boosted on September 16, 2018, 07:20:30 PM
They are supposed tobe fit and forget...but there have been failures so the jury is still out on them tbh. If they came from Rotary Revs they will have lifetime warranty...

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Goods news about coils. Ht leads look like they've done 40k, might replace those. Surprised Carl doesn't remember the car, had been there enough times! (https://uploads.tapatalk-cdn.com/20180916/46feaf1336f377a5e8b02ff3a5ea9f7f.jpg)(https://uploads.tapatalk-cdn.com/20180916/57ba63bdb21123d5d41298804b058753.jpg)(https://uploads.tapatalk-cdn.com/20180916/ca487ed42b654cba8b5984666699510f.jpg)(https://uploads.tapatalk-cdn.com/20180916/a45d968f15cf14122ede494489b00ac7.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 08:55:44 PM
Another job complete. Couple of p clips to hold the coolant pipe. (https://uploads.tapatalk-cdn.com/20180916/05afd2c1695a609d444879fae8d82ccd.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 08:58:26 PM
Vac/servo hose straight swap(https://uploads.tapatalk-cdn.com/20180916/614096b0adffa89999a2ff3e061658ed.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 10:14:24 PM
Thats the Haynes book of lies for mx5 fuel pump specs. Not much info... (https://uploads.tapatalk-cdn.com/20180916/aceb87c9d7ed67e64f9cd5f36c56f933.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 16, 2018, 10:27:13 PM
ABS pump bracket will be a hybrid with mx5 and rx8 bolted together, need some plates from work tomorrow, so hopefully progress tomorrow evening. Then to dust off my brake pipe flaring skillz(https://uploads.tapatalk-cdn.com/20180916/58c009f30b04868d1bfc7a552f2b6d3b.jpg)(https://uploads.tapatalk-cdn.com/20180916/4f942eba03b685f2d573a810d4bddfe9.jpg)(https://uploads.tapatalk-cdn.com/20180916/bd3c7af8c7758e76d622ee374e2f32a3.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 17, 2018, 07:19:32 AM
Took the dive and ordered tactrix obd port doodah and mazda edit...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 17, 2018, 10:35:06 AM
I tried to find info on NC and Rx8 fuel pump flowrate but drew a blank...a common upgrade for an rx8 is 255lph pump..walbro 255 or similiar...if you have the 8 pump pot assembly does it fit in the tank?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 17, 2018, 05:15:50 PM
Rx8 has 80k, mx5 has 32k on the clock. Would rather use mx5 for reliability

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 17, 2018, 07:45:39 PM
This landed today.
Nearly finished the mazda edit install(https://uploads.tapatalk-cdn.com/20180917/e20375d00c7bac4b894ef54e4dc57f8a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 19, 2018, 10:28:35 PM
A bit yeehaw but it's sturdy and secure. It shall do(https://uploads.tapatalk-cdn.com/20180919/b4c79f37421a336339aa24414f802acc.jpg)(https://uploads.tapatalk-cdn.com/20180919/6a5583005e7a416cb511197d85c61a1d.jpg)

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(https://uploads.tapatalk-cdn.com/20180919/81ff91a32f429c821ae15f41d24bbd85.jpg)(https://uploads.tapatalk-cdn.com/20180919/ee9c21ac557e5aa6d0df8a4384d8268c.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 21, 2018, 11:41:32 AM
I bet when you get in bed your mind keeps going over jobs that need doing...i know mine did when doing the Westfield.
I learnt to meditate to clear my mind.
I repeat "dont think of anything" over and over again...usually does the trick..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 21, 2018, 03:56:17 PM
Kind of blessed with having adult ADD so I forget half the stuff I'm supposed to remember. We'll abs pump in and it fits! Lines next(https://uploads.tapatalk-cdn.com/20180921/0b9fbadc707cf492bde81c75e45c8603.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 21, 2018, 08:29:28 PM
Not the prettiest but it will do. Managed to manipulate oe lines so far. Got to source another flare nut from euro car parts in the morning. There's a funny size on the mc feed (https://uploads.tapatalk-cdn.com/20180921/164cf3714510d82b851e26210d42f093.jpg)(https://uploads.tapatalk-cdn.com/20180921/ad6dbb760f522d97b17af28d808c4dd6.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 22, 2018, 01:43:04 PM
Luckily ecp sold the nuts, but in packs of 25.so I've a few spare!
I won't be flaring any more brake lines for at least another 5 years! Really peed me off.
So the ABS pump is pipe up, redone the line I did last night. Was rather drunk when I did the first attempt!
Also modified the clutch slave cylinder line, that's now complete.
Next job either swap the good ridge hoses over on the back or either fuel hoses etc(https://uploads.tapatalk-cdn.com/20180922/c7f18b79ede00eb4feb8df2c34122377.jpg)(https://uploads.tapatalk-cdn.com/20180922/59f8fc8e8e140577d61fdcbe9cf7ad99.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 22, 2018, 01:45:15 PM
Also the mx5 washer pump pushes straight into a pug 205 washer bottle. This will suit nicely in the corner of the engine bay. Also need to mount catch tank(https://uploads.tapatalk-cdn.com/20180922/99c357616b8404e6aaafadef1ec72907.jpg)(https://uploads.tapatalk-cdn.com/20180922/e409d29b0f9e379b64232a42e048bacf.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 22, 2018, 01:46:17 PM
Also bolted on the exhaust bracket. Loads of clearance :) lambda sensor also installed(https://uploads.tapatalk-cdn.com/20180922/913f90a70635d599b9fde817bc88c0a8.jpg)(https://uploads.tapatalk-cdn.com/20180922/509053c1aa8993b44ee1957229b5c646.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 22, 2018, 07:49:41 PM
Struggled with the weather today, only 2 days I've got to myself to do the car and it bloody pisses out down ffs.
Now in pretty certain this is Internet pub talk "misinformation" but I honestly cannot see a bloody difference between the mx5 and rx8 clutch pedal assembly. Apparently the rx8 setup is stronger? The only thing I can see is larger is the return spring ?! (https://uploads.tapatalk-cdn.com/20180922/6a97e641e3f5094e23c4baa5c37a022b.jpg)(https://uploads.tapatalk-cdn.com/20180922/ac4b6b9c4e7f56624c438adc9341ebff.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 22, 2018, 07:51:42 PM
Also made a start on the wiring I'd been putting off for a while(https://uploads.tapatalk-cdn.com/20180922/1f2df4855c2be4202f8d05a02537267c.jpg)(https://uploads.tapatalk-cdn.com/20180922/6a785b8595d479fa4f8cb362f3b3605e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 23, 2018, 02:52:53 PM
Alas the sun has returned, amazing the difference it makes.
More progress, wiring again. Glad I'm chipping away at it been quite a mental blocker for me. Also ordered a deatchsworks 300c 340lph  fuel pump. £165 lighter. But apparently a direct fit! (https://uploads.tapatalk-cdn.com/20180923/55e073c64b19fffef9abbce7ba5a0e21.jpg)(https://uploads.tapatalk-cdn.com/20180923/30824cf675b440d0ff5e65f556a099ee.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 23, 2018, 03:09:30 PM
Cool..good shout on upgrading fuel pump..
There is a reg mod could do whilst fuel pump out...there are little plastic piece that could me plastic welded ( tab with soldering iron) on top of intank regulator.
You should get a nice piece of convoluted hose with pump...soften ends with hot water before fitting...i used some hose clips as well for insurance.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 23, 2018, 03:10:55 PM
See you got the whole dash out...you putting the 8 dash in?...ive no idea if it fits mind.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 23, 2018, 03:14:58 PM
I'm struggling to make sense of some of that, predictive text fail?
Can you expand on the reg mod?
Had the dash out to swap the loom over, thought it was easier as I havent got small Japanese hands

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 23, 2018, 03:18:51 PM
On the top of regulator on fuel pot assembly is a plastic clip...weld it on with small tabs..ie melt it on in 1 or 2 places.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 23, 2018, 03:22:25 PM
I'll take it apart and have a look. I take it the regulator is separate to pump?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 23, 2018, 03:27:49 PM
Sits on top obvious when you look at it.. not essential you do...ive done with uprated and delete of fuel pump resistor means high pressure behind reg all the time.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 23, 2018, 03:56:34 PM
Cool I'll have a look thanks

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 23, 2018, 03:57:22 PM
Random find of the day. Heard a rattling noise and found this! How the hell did that get in there?! (https://uploads.tapatalk-cdn.com/20180923/644cf141f0b8421ae9351521f8a20a5f.jpg)(https://uploads.tapatalk-cdn.com/20180923/99e15e588ae332e2c6ca7a545ed389aa.jpg)(https://uploads.tapatalk-cdn.com/20180923/1bd083830cdb1af7247d9231153f56f0.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 25, 2018, 08:56:50 AM
Tried ordering a deatschwerks pump but the seller accidently had it listed as being in stock. He's recommended a quantum pump which I've ordered hopefully it's the correct one. Got a few nights in centre parcs for a little break, so only procrastination taking place for the next couple of days

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 25, 2018, 09:09:41 AM
Does any one have the I. D. of the rx8 intake boot to hand? Or the O. D. Of the maf tube?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 26, 2018, 02:02:58 PM
Quote from: Paul_13 on September 25, 2018, 09:09:41 AM
Does any one have the I. D. of the rx8 intake boot to hand? Or the O. D. Of the maf tube?

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Any one? Would be a great help

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 26, 2018, 07:26:50 PM
Tomoz mate ill remember to measure.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 26, 2018, 07:49:39 PM
Many thanks.
Just reading up about mazda edit. Going to adjust dwell timing for d585 coils and possibly look into omp settings.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 27, 2018, 01:52:59 PM
Hopefully this will all be the right size for the air intake. I'll have to measure the maf tube when I'm home.
Honda s2000 Air filter which has a 86mm internal neck diameter, 90mm tube (1.6mm wall thickness) and 90mm id 90' degree elbow.
Also thinking of buying the air straightener to put before maf sensor as I won't be able to use the rx8 screen. This should hopefully help distribute the air over the sensor correctly.
Similar setup to my mx5. Very limited to options but I'm not decreasing the bore size any where and it should be pretty free flowing.
All in all around £130. Or buy a non K&n filter which will be vastly cheaper(https://uploads.tapatalk-cdn.com/20180927/25b214b066f17f279ad311aa266e940c.jpg)(https://uploads.tapatalk-cdn.com/20180927/2c4d61e49c20fc31de234f0dac93687c.jpg)(https://uploads.tapatalk-cdn.com/20180927/9c02a32aacd1da719efe72fa8905a040.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 27, 2018, 03:06:17 PM
The small side is 80mm dia and large size onto filter box 95mm dia.
(https://uploads.tapatalk-cdn.com/20180927/cde1a2025fdd165581c497e1e5fe6a58.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 27, 2018, 03:16:59 PM
Could you measure the maf housing pretty please as well

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 27, 2018, 03:28:26 PM
I cant mate sorry...im off work ill with ibs thats was my venture outside today im back in bed already.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 27, 2018, 03:31:45 PM
Sorry to hear that! Hope you get better

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 28, 2018, 04:46:10 PM
Quote from: Paul_13 on September 27, 2018, 03:16:59 PM
Could you measure the maf housing pretty please as well

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Back on my feet..what do you mean by maf housing?...i have not got standard on mine...my car uses a cut up KnN typhoon tube with a massive ramair filter stuck out the nose cone...its joined by a silicone coupler...not sure i got what you need to measure.(https://uploads.tapatalk-cdn.com/20180928/58e0f00e95d96a6fd76090f93e0d5fd5.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 28, 2018, 05:07:53 PM
Not to worry back of holiday now and measured it up(https://uploads.tapatalk-cdn.com/20180928/a5509890482c6f1807918608057e9555.jpg)(https://uploads.tapatalk-cdn.com/20180928/d38d30105eb6051586823935a5b96814.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 28, 2018, 05:10:27 PM
Plan is to cut it off before air box and blank off hole. Can't find a maf housing tube for reasonable money, only stuff in America which is dear(https://uploads.tapatalk-cdn.com/20180928/9354691b481d77fc969008e04c43ab76.jpg)(https://uploads.tapatalk-cdn.com/20180928/7dc1692e41c5165c7e5ca6d63227adcd.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 28, 2018, 05:34:20 PM
Ok cool.yep thats why i cut an KnN typhon kit..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 28, 2018, 09:45:03 PM
Radiator mounted. Bloody snapped off the top hose. New rad needed.
Yanked fuel pump out and going to fit one I bought.
Front drop links fitted.
Cold air intake ordered
Rear brake lines were seized, going to forget fitting the rear braided lines. (https://uploads.tapatalk-cdn.com/20180928/d808d926aaf92abacf698b62c6db5c59.jpg)(https://uploads.tapatalk-cdn.com/20180928/d0360c49773d1322efa4d6f07d9ce098.jpg)(https://uploads.tapatalk-cdn.com/20180928/8d19a28b0383ffa099b93a86b4737303.jpg)(https://uploads.tapatalk-cdn.com/20180928/e6063888b7c3af5b9189a90089bbfc21.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 28, 2018, 11:10:43 PM
New fuel pump. Was recommended this by the supplier as they didn't have any deatschwerks ones in stock. Hopefully a straight swap. The old gauze was really clogged and a lot of metal :/ not sure what would cause that but would explain the lack of performance on the 1.8! (https://uploads.tapatalk-cdn.com/20180928/bb517b7af0d6f40bbe3d3eb51ae8cda5.jpg)(https://uploads.tapatalk-cdn.com/20180928/b97b77e8ce8adb5ba0b5cb75cc0eb5a0.jpg)(https://uploads.tapatalk-cdn.com/20180928/301f90118e4b71d67b0077065a367f2a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 28, 2018, 11:45:57 PM
Much easier than I thought! (https://uploads.tapatalk-cdn.com/20180928/23c764f6166d6511f87883a5be2a98e8.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 29, 2018, 07:38:43 AM
Similar but different to the rx8 fuel pot...the central chamber is in fact a secondary filter on the 8 and looks like it is too on the mx5.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 29, 2018, 07:46:56 PM
Stupid me didn't label up which was fuel line and what was evap....
Today has been full of mincing about without achieving a lot.
I've figured wiper wiring, going to do that later a long with extending the indicator loom to reach mx5 side indicators.

Picked up a new rad with ecp discount. Wasn't a bad price!

Also had a coil fail on the 330i this morning so had to fix that, went for a full set in the end along with plugs. Runs like a dream now.

Old mx5 engine is ready for its new home, being collected tomorrow. 33k Genuine miles! (https://uploads.tapatalk-cdn.com/20180929/73f9bb4c18090532fdb44063639189dd.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 29, 2018, 07:51:47 PM
Nc engine in demand me thinks...nearly as unreliable as a renny lol...
Earlier discussion on fuel gauges...does the mx5 have dual fuel gauge senders? The 8 does.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 29, 2018, 08:09:27 PM
Mx5 only has one. I'll have a look at rx8 wiring but I think the wires which transmits signal links into fuel pump sender wire from memory. I'll double check

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 29, 2018, 08:13:26 PM
Worth a look see..rx8 dash is expecting 2 senders.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 29, 2018, 08:16:46 PM
Might bridge the 2 in the diagram(https://uploads.tapatalk-cdn.com/20180929/2013e3713b9ee5fee10cdbd07042a4f4.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 29, 2018, 08:20:33 PM
Thought i mention it. Worth a shot.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 30, 2018, 09:02:20 AM
A few little wins last night wiring wise. Wiper is now wired up and also the indicators(https://uploads.tapatalk-cdn.com/20180930/fe14d017c9509813d8a08e4e26f62ee8.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 02, 2018, 09:10:38 PM
Nice easy fix on fuel sender I hope. I just need to get rid of green/white cable and keep black /brown and red /blue. Red/blue cable needs to spliced into 2 to give false reading for "sub" fuel sender(https://uploads.tapatalk-cdn.com/20181002/c0b2222b9bd6634f1a1572e032540e12.jpg)(https://uploads.tapatalk-cdn.com/20181002/77bc228f29bd6b3f7a42cd297cf115c9.jpg)(https://uploads.tapatalk-cdn.com/20181002/8d783244318f7cd029ce8c8b6baa23ad.jpg)(https://uploads.tapatalk-cdn.com/20181002/9f61148832577b152e996616ac38d48a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 07, 2018, 09:42:34 PM
Wiring wiring and more bloody wiring. Making good progress though. (https://uploads.tapatalk-cdn.com/20181007/9a86cad6d954a382ec098df8e4664e86.jpg)(https://uploads.tapatalk-cdn.com/20181007/740a28e7710c2625c57aafb6d42a0a80.jpg)(https://uploads.tapatalk-cdn.com/20181007/e028f86e4d15c53bb9b3f5c7f2bab0fa.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 08, 2018, 10:29:39 PM
Dsc sensor was a straight swap over from rx8.
Key was a straight swap(https://uploads.tapatalk-cdn.com/20181008/7fb37f7c55eefb110cd357d627fe2884.jpg)(https://uploads.tapatalk-cdn.com/20181008/09d636f7e38110615bb0f7fb7fc9257b.jpg)(https://uploads.tapatalk-cdn.com/20181008/9ad470e2ae7d3cc37010e198aabb4ca0.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 08, 2018, 10:31:27 PM
Fan wiring connectors are almost a straight swap. Just got to unpig connectors and swap plug over. Pretty much a straight swap! (https://uploads.tapatalk-cdn.com/20181008/e1ff67dd78f00df982f7aba378361a74.jpg)(https://uploads.tapatalk-cdn.com/20181008/1c4e09bc69463b3e1368ad97b4976ad4.jpg)(https://uploads.tapatalk-cdn.com/20181008/fd4ccd9f3e8110d9467eeac833f887af.jpg)(https://uploads.tapatalk-cdn.com/20181008/12db3f363821bf11f4570ee236347cda.jpg)(https://uploads.tapatalk-cdn.com/20181008/deea3bf2c73aef820a18b2d54d989f3f.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 08, 2018, 10:33:21 PM
Steering column is identical to rx8 along with the connectors for stalks/key barrel etc
Swapped bits over so I could keep mx5 key working.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 08, 2018, 10:34:27 PM
Waiting for this to turn up also. Got IDS working but won't work with vcm1 cable I have. (https://uploads.tapatalk-cdn.com/20181008/d7aae9dfb88e9366ca222cc25931a59f.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 08, 2018, 10:35:48 PM
Still waiting for alloy pipe for air filter to turn up. This one turned up by error 100mm dia x 100mm length. Not 90mm by 1M...thanks ASH.
hopefully replacement on its way. (https://uploads.tapatalk-cdn.com/20181008/7347293d48ea2121f7dc4e38402dcf57.jpg)(https://uploads.tapatalk-cdn.com/20181008/564924a4c7eeb049c4f4b4746e0a91c6.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 12, 2018, 08:11:09 PM
Still waiting for alloy pipe to turn up right. Wrong size delivered yet again. Right diameter wrong length.
I've plugged the second loom in for the dash and everything marries up ish.
Got to relocate window switch now.

Has anyone got a photo of the plug on the hazard light switch?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 20, 2018, 11:39:17 PM
Still making good progress. Bit of a milestone today with powering things up :)
Only things I've buggered up so far are wiper setting 1 & 2 are wrong way round.
Boot popper doesn't work. Think I know what it is.
But fog lights work, indicators work, side lights work. Wipers work. Not sure if fuel gauge is displaying correctly. (https://uploads.tapatalk-cdn.com/20181020/f9ee15e8a60e8b12a6a0c2c8ec6148bc.jpg)(https://uploads.tapatalk-cdn.com/20181020/8b15d595de7ee9e1b8ced1e160a68413.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 21, 2018, 09:30:14 AM
Figured out the boot popper issue. Forgotten where I've placed the cancel switch. Just going to join the wires.
(https://uploads.tapatalk-cdn.com/20181021/cc3c0576d18968a94304fdc621455248.jpg)(https://uploads.tapatalk-cdn.com/20181021/68ee174ee8c7f50f162486c117241cf7.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 21, 2018, 09:34:45 AM
Also another over sight is the dipped beam bulbs. Rx8 is HID's. Luckily all it involves is removing the W/B and P/W wires from the grey plug and splice them into the mx5 plugs and run new earth cables. Bit of a ball ache removing the loom again but want to keep it neat.
The pics show what the wiring differences are(https://uploads.tapatalk-cdn.com/20181021/1a0aa8bc1810e28ef4ab69e77b729ac9.jpg)(https://uploads.tapatalk-cdn.com/20181021/134bc4a154d5b6834b5b286b6d903ab2.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on October 21, 2018, 10:26:11 AM
As you say, still making progress :great:
Excellent thread  :13:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 21, 2018, 11:01:06 PM
Boot popper works, "deleted" the boot popper cancel switch.
Central locking now works also - blown room fuse.
Windows work
Hazards work
Mirrors work

Only thing I need to look into now is the heater controls. Mx5 and rx8 are a bit different in how they work. Probably going to need to use mx5 setup and splice cables in (https://uploads.tapatalk-cdn.com/20181021/11b83e37ad8a22388b4520b7207fbe95.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 22, 2018, 11:32:50 PM
Argh, I'm working away from home for 2 days and it's killing me!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 24, 2018, 10:26:00 PM
Brake light now work after a crossed wire.
Also the reverse light works, gearbox is filled with oil and selector is bolted down.
Interior light issue sorted.
Wiper issue sorted.
Nearly there(https://uploads.tapatalk-cdn.com/20181024/d954e4de77592e650ddaa5d105e2d4c6.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 25, 2018, 11:23:15 PM
Tonight's progress :
Heated rear screen works
Boot interior plastics are back in place.
Rear half of interior plastics are also back in.
Fuel pump works, fired a bit of fuel out to check it(https://uploads.tapatalk-cdn.com/20181025/05859425a3300647c5749af09ba4ecbe.jpg)(https://uploads.tapatalk-cdn.com/20181025/b1c63098e1c9350a64a5611c8f1b47ac.jpg)(https://uploads.tapatalk-cdn.com/20181025/09298c9991e89990b51b2b07f4877c40.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 27, 2018, 08:41:53 AM
Carpet is back in.
Worked out the fan controls, need to finish off splicing in mx5 loom.
Also need to convert the auto leveling headlight to
SOO MUCH BLOODY WIRING manual(https://uploads.tapatalk-cdn.com/20181027/e6d08f32d54f71c2831826a841a08133.jpg)(https://uploads.tapatalk-cdn.com/20181027/91fb58c0e0823e3fe2d94d959b19f1d8.jpg)(https://uploads.tapatalk-cdn.com/20181027/9dc889498c88d1cbeccee85d96ae5535.jpg)(https://uploads.tapatalk-cdn.com/20181027/4f0c55a8e7a939d2cf2e6beed4e2ead1.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 28, 2018, 07:56:45 PM
Todays progress :
Air box mounted
Dash is half in
Wiring is all in apart from stereo
Manual head light adjusters work :)
I earthed the air bag warning light wire and the warning light went out :)
Removed the auto leveling wire and that warning light went out also
Got a connection to the ecu with obd reader :)

Got to test heater controls next. Then dash can fully go back together(https://uploads.tapatalk-cdn.com/20181028/0cd9cfbcd5fdb468b5549bc42aa22830.jpg)(https://uploads.tapatalk-cdn.com/20181028/6f0873eaaf716c0e8682600c8bf59d4b.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on October 29, 2018, 08:49:01 AM
Great Progress.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 29, 2018, 11:09:22 PM
Stereo wired back up, sub woofer and amp powered up

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 30, 2018, 11:01:20 PM
Dash in after 2.5 hours of buggering about. 5 attempts to realise where I was going wrong and bits I missed off. Rest of interior to be fitted tomorrow(https://uploads.tapatalk-cdn.com/20181030/b0cb2e1a32153a1c4790b20686e34912.jpg)(https://uploads.tapatalk-cdn.com/20181030/4f02ac9fb00d789b28ee795dda7e015e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 31, 2018, 11:45:12 PM
More dash bits in.
Took a while to get the glove box to fit and had to relocate dsc switch.
Seats and steering wheel in tomorrow(https://uploads.tapatalk-cdn.com/20181031/6b0225be945f59aba0f714555d014c44.jpg)(https://uploads.tapatalk-cdn.com/20181031/d8a31e391287f0edcb78d5762703b32f.jpg)(https://uploads.tapatalk-cdn.com/20181031/ffc39eca0e51a21f9fe333ecc571322e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 01, 2018, 11:17:42 PM
Seats are in.
Also mocked the clocks up. Need super glue!
Need to figure out how to fix them. At first sight they look identical to the mx5 clocks but the lower screw holes don't line up ffs. Top mount is different also. (https://uploads.tapatalk-cdn.com/20181101/14bf6dabfc7b989f88c662777ce75363.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 02, 2018, 11:15:51 PM
Only bit I'm not overly happy with. But it works(https://uploads.tapatalk-cdn.com/20181102/c3413f5a9f409708c68509e0f0915b6e.jpg)(https://uploads.tapatalk-cdn.com/20181102/fda537c2b5bb7e458e6667127281cde2.jpg)(https://uploads.tapatalk-cdn.com/20181102/50d0618d2375e5bf146dfcb4a0cc0a49.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 04, 2018, 11:21:51 PM
Today's work included
- piping up heater box
- installing Peugeot 205 washer bottle
- relocating washer jet hosing to opposite side of engine bay.
- taking off manifold to put a bit of 9mm rubber fuel injection hose on instead of the oe nylon hose (which I proper buggered up thinking it was heat shrink d'oh). Not the prettiest job with the fuel hose but it does the job.

Aaannndddd I got Mazda IDS working.
Chinese seller is a complete twat.
Basically its a vcx diag unit in a vcm 2 case.
The software he supplied on the cd was corrupt.
You have to install mazda ids 106, then the update to 106.07. Install ford vcm manager. Install vcx diag manager.
After a lot of head scratching (read that a month of my life!) trying to get the thing working, I succeeded!

(https://uploads.tapatalk-cdn.com/20181104/9be55547b17f8fa9c9081e66343afb1d.jpg)(https://uploads.tapatalk-cdn.com/20181104/93bfb74fbf37cacafc7d6ee0cb71370b.jpg)(https://uploads.tapatalk-cdn.com/20181104/8a1df421c52a55839e3697bd7bbec554.jpg)(https://uploads.tapatalk-cdn.com/20181104/fbe2939dcc8fd1ee381c9b205cf6d797.jpg)(https://uploads.tapatalk-cdn.com/20181104/c17f98745896c7f1b25aa60802c07f5e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 05, 2018, 11:17:41 PM
Hooked up the air filter.
Booyakasha(https://uploads.tapatalk-cdn.com/20181105/ad49078b2cab70641b11cc6c0917013b.jpg)(https://uploads.tapatalk-cdn.com/20181105/0281d81ade47f29bcc160164452693b9.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 05, 2018, 11:20:21 PM
Plumbed up the catch tank, like to think I've done it right this time compared to the previous owner. Had oil /vapour print all down the side of the fuse box. As a result everything rusted even more... Weirdly.
Strut brace is also back on, everything fits!
Refitted the front brake lines, ready to bleed.(https://uploads.tapatalk-cdn.com/20181105/6b41d003062c2d4ccbd064cf235f0ba7.jpg)(https://uploads.tapatalk-cdn.com/20181105/392ef74210165cec658a518635106ee5.jpg)(https://uploads.tapatalk-cdn.com/20181105/69d497f22a97dea0dce43018e1312a50.jpg)(https://uploads.tapatalk-cdn.com/20181105/c49b2c08cbf3649eaa63530a0f58ac4a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 05, 2018, 11:21:06 PM
Oil cooler lines.... Loads of fun... Naht(https://uploads.tapatalk-cdn.com/20181105/79fb27af5aad1d559533c14b5ee49549.jpg)(https://uploads.tapatalk-cdn.com/20181105/72f3b44ab2640e453f359289af8fc7aa.jpg)(https://uploads.tapatalk-cdn.com/20181105/397e259a2416b2f6c0247ecdde265243.jpg)(https://uploads.tapatalk-cdn.com/20181105/cea88bc3fe2e7b07b38d8e339cc686a3.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 05, 2018, 11:22:29 PM
Trimmed the rx8 maf housing off the box. Elbow is a snug fit behind the bumper bar!
Need to figure out how to block the hole off from the resonator (https://uploads.tapatalk-cdn.com/20181105/0697d28b74a2f66f0904effad57c61f2.jpg)(https://uploads.tapatalk-cdn.com/20181105/635b28702710a7ddbbe90ae9b8397688.jpg)(https://uploads.tapatalk-cdn.com/20181105/5cb74d4dd983780fdba3a9798c686b31.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 06, 2018, 05:10:19 PM
I know youve already got an oil cooler, But advisable to use the 8 1s if possible they have inbuilt thermostats to get the oil up to temp quicker. Or use an oil thermostat.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 06, 2018, 05:14:03 PM
I did have a chat with hayward rotary before buying, only option I had really

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 06, 2018, 05:21:41 PM
I run 2 mocals and was gonna put a thermostat in..road use i block 1 and on track i prewarm else takes 2 lap to get up to 80 deg C.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 06, 2018, 06:24:01 PM
Crikey. Might need to have a think

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 06, 2018, 07:00:27 PM
There are oil filter sandwich plate thermostats available that would work...i find  the oil has About a 10 min lag behind the coolant so without a thermostat your prob looking at 20 mins for the oil to get upto working temp roaduse.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 06, 2018, 11:08:09 PM
Get the cooler mounted tomorrow and radiator.
Managed to get the gauze to fit before the maf housing, may save some hassle in the future. Still working on a way I can block the bottom hole off. Any ideas? (https://uploads.tapatalk-cdn.com/20181106/5a405d04c12d563cab2b54f3a305d7c8.jpg)(https://uploads.tapatalk-cdn.com/20181106/82e6ea606bee0b8a7587a2a744bbde0d.jpg)(https://uploads.tapatalk-cdn.com/20181106/5c0ad623502755a17ebddfdb1af2d625.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 06, 2018, 11:09:41 PM
@boosted do you run the gauze/air straightener on your setup? If not any issues?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 07, 2018, 05:10:36 AM
Yes i run 1...without get a maf refated code. System too lean etc i got through about 3 mafs in the early days before i fitted a gauze and no more issues.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 07, 2018, 11:00:05 PM
A bit of progress tonight, maf tube sorted. Ended up getting the soldering iron out and welding a plate in the opening. Not pretty but does the job.
Also cut the first bit of tube for air intake. Fits nicely! (https://uploads.tapatalk-cdn.com/20181107/e4862bbdad4102f7e8d9bb6146ab2b1c.jpg)(https://uploads.tapatalk-cdn.com/20181107/bae6f4e630431cef4acb70a2f0275ccc.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 08, 2018, 11:46:52 PM
Radiator is now in and fixed. Had to drop mounting arm brackets by an inch.
Oil cooler next(https://uploads.tapatalk-cdn.com/20181108/ef829ef6dd1a50cc855d5a022fe321d3.jpg)(https://uploads.tapatalk-cdn.com/20181108/2d70ecf1a9906cc51aac1505f6c63f6b.jpg)(https://uploads.tapatalk-cdn.com/20181108/213cf2a5c1ed42873629eb86fbb8812c.jpg)(https://uploads.tapatalk-cdn.com/20181108/64ea68cac27093efbe5548a3c58bf2de.jpg)(https://uploads.tapatalk-cdn.com/20181108/8f700dad4238b10e4d9bdd20e748b26f.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on November 09, 2018, 12:17:28 AM
Coming along nicely

:happy1:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 09, 2018, 04:30:28 PM
https://www.merlinmotorsport.co.uk/p/mocal-oil-sandwich-plate-with-thermostat-m-otsp-1

this is the thermostat thingy i was thinking off. not this exact 1 needs some investigation but its doable on your set up.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 09, 2018, 04:38:09 PM
What did you do with the connections on the irons? Blank them off?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 09, 2018, 04:52:09 PM
I am assuming so im at the same point as you but ive already got a sandwhich platewith oil temp and pressure worry gauges plumbed into. Not sure if you can stack them.
My understanding is up from sump through filter out of fitting on filter mount that bolts to rear iron...round oil coolers.( or bypassed by there thermostats) back to front iron return to sump. Unsure where the oil on bypass below 80 degress goes?
There are other seperate units you can get but bulky and for me involved a whole redesign that i just have not got round too.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 09, 2018, 04:53:50 PM
Ill link the other type which is more obvious.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 09, 2018, 05:01:03 PM
https://www.merlinmotorsport.co.uk/p/mocal-oil-thermostat-with-1-2-inch-push-on-tails-m-ot-8po

this is the other type that is simple to work out where the oil goes. 4 ports 1. oil in  2. oil out to cooler above 80 deg C 3. cooler return 4. oil back to sump either cooled or bypassed.

this with 1 cooler is a neat simple idea not as neat as sandwich plate if doable mind.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 09, 2018, 10:06:31 PM
After nearly a year of hunting for a grille I found one second hand on ebay! Fitted it tonight, looks good.
Connected mazdaEdit to the ecu.
Didn't get anything else done because of the bloody weather(https://uploads.tapatalk-cdn.com/20181109/906e5b5240da4830504af673a2665946.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 10, 2018, 09:42:03 PM
More slow progress because of the crap weather.
Oil cooler is mounted, air filter on and bumper test fitted. Everything fits! (https://uploads.tapatalk-cdn.com/20181110/0ae876ad1a52f4935adadf32ac7ee999.jpg)(https://uploads.tapatalk-cdn.com/20181110/408797b020a6a5e63317199410e3eec4.jpg)(https://uploads.tapatalk-cdn.com/20181110/103c0def3d047d64417ebf15dc4148df.jpg)(https://uploads.tapatalk-cdn.com/20181110/fe41700d8e7c3780345f136bec7d5dee.jpg)(https://uploads.tapatalk-cdn.com/20181110/bcad14f78a05b6ca0eb6adcbcb147bf8.jpg)(https://uploads.tapatalk-cdn.com/20181110/f9e305630daaf2fa5efa98bf848c4b29.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 11, 2018, 01:18:27 PM
Mazdaedit is up and running :) apologies for the crap pics(https://uploads.tapatalk-cdn.com/20181111/8b6eb2fba2723191d4c61fc224dc89cb.jpg)(https://uploads.tapatalk-cdn.com/20181111/e5268a19d0ae936b3c869555bdf09e6f.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on November 11, 2018, 02:03:05 PM
Really getting there now  :great:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 11, 2018, 04:41:12 PM
Quote from: clive on November 11, 2018, 02:03:05 PM
Really getting there now  :great:
Very nearly there. (https://uploads.tapatalk-cdn.com/20181111/34dd379cf98d131698edf70f71f13bf0.jpg)(https://uploads.tapatalk-cdn.com/20181111/fd33e7bfb404d7fab73ab7b95d0f1190.jpg)(https://uploads.tapatalk-cdn.com/20181111/c348b4ce76ce56645a0a300fdb9c4d6d.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 11, 2018, 10:39:04 PM
Got immobiliser problems, fast flashing immobiliser light, no starter.
Can't connect ids to it now either...
Does mazda edit affect anything? I haven't flashed the ecu only read it

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 11, 2018, 11:33:21 PM
Anybody know where the starter interlock switch is? I'm pretty certain I don't remember coming across this.
Going to earth the pin on the starter relay and bypass the pcm to start with.
I'm certain I've swapped everything over?! Ecu, keyless module. Using the right key next to halo(https://uploads.tapatalk-cdn.com/20181111/beeee9fab036d663d6375b2b343674ab.jpg)(https://uploads.tapatalk-cdn.com/20181111/b1b9011748798adc01bc3ddb37cd3c4f.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 11, 2018, 11:36:46 PM
I think the interlock switch is the clutch switch?! Possibly. I don't remember having to push the clutch to start it on the rx8

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 12, 2018, 08:49:45 AM
Starter interlock switch is the switch on the clutch pedal..not fitted on uk series 1 rx8 cars i believe on usdm and jdm cars my S type had to have the clutch pedal down to start.
Id check all the fuses first..flashing immobiliser light usualy means not recognised key chip.
You probably know this but never put jump back on with ignition ON has been know to wipe immobiliser codes and/or fry pcm..
Id check your fuses and report back.
The immobilisation is the starter relay and 2 other circuits so its gonna be the flashy light stopping it energising. The fact you now cant get comms with mazda edit makes me think a missing feed from a blown fuse or such like.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 12, 2018, 01:45:23 PM
Quote from: boosted on November 12, 2018, 08:49:45 AM
Starter interlock switch is the switch on the clutch pedal..not fitted on uk series 1 rx8 cars i believe on usdm and jdm cars my S type had to have the clutch pedal down to start.
Id check all the fuses first..flashing immobiliser light usualy means not recognised key chip.
You probably know this but never put jump back on with ignition ON has been know to wipe immobiliser codes and/or fry pcm..
Id check your fuses and report back.
The immobilisation is the starter relay and 2 other circuits so its gonna be the flashy light stopping it energising. The fact you now cant get comms with mazda edit makes me think a missing feed from a blown fuse or such like.

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What do you mean by the other 2 circuits?
Going to check fuse etc on a fresh head

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 12, 2018, 03:42:02 PM
Coils and fuel pump circuit are also disabled by the pcm for immobiliser function.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 12, 2018, 03:59:43 PM
Fuel pump was priming. That's what I can't get my head round.

What parts are "coded" pcm obviously, keyless module.. What else?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 12, 2018, 04:18:23 PM
Trying to find a photo and failed.
You need pcm, key and visteon immobiliser module all from same car. The coil and receiver are dumb and not needed to be coded. As all your bits came from a running car must be a power feed or missing earth. Not sure why your cars priming the fuel pump though.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 12, 2018, 04:43:34 PM
(http://i1065.photobucket.com/albums/u397/boosted38/b631ead4-eebb-49c0-9d18-54888e48922c_zpsaevqhbde.jpg)

found it.....

the receiver is required but not coded. got some doubt in my mind of the coil...but all your parts are from the same running car?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 12, 2018, 04:46:30 PM
if you get stuck this is my spare running set so could send it out to you.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 12, 2018, 04:53:23 PM
heres a motivational piccy... (http://i1065.photobucket.com/albums/u397/boosted38/IMG_1981_zps022872fd.png)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 12, 2018, 06:50:28 PM
Quote from: boosted on November 12, 2018, 04:43:34 PM
(http://i1065.photobucket.com/albums/u397/boosted38/b631ead4-eebb-49c0-9d18-54888e48922c_zpsaevqhbde.jpg)

found it.....

the receiver is required but not coded. got some doubt in my mind of the coil...but all your parts are from the same running car?
Yes all from the same car. I need to trace wiring diagrams and check I haven't missed anything off the plugs in the foot well.
I've swapped all of those parts over, only thing I need to check is the visteon small black box and make sure its plugged in properly.

OK  good to know,thanks for the offer!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 12, 2018, 06:52:45 PM
My only thought is I've removed the sas unit completely and it doesn't show on the can network. But surely that shouldn't stop it from starting.
Just to clarify mazda edit connects as does my obd Elm327 reader. But IDS doesn't.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 12, 2018, 07:31:31 PM
Sas will not effect it...what error code if any are you getting?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 12, 2018, 08:13:40 PM
On the larger black box theres load of 12v feeds and several earths too. Would only take  1 to be missing and no dice.
My westy has no abs no rx8 dash no sas no tc basically fusebox and pcm and runs so can discount all that...a code read would help.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 12, 2018, 08:17:50 PM
Looks like I might have to take dash/heater box out again. Space is so tight

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 12, 2018, 08:20:59 PM
P1260 is the error code I was getting. Anti theft - engine immobilised on obd reader.

On ids while it worked I got the errors in the attached pic, didn't try to start the engine at that point

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(https://uploads.tapatalk-cdn.com/20181112/e3932adc195dfa9be95372c6376478fd.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 12, 2018, 08:28:47 PM
RKE is immobilser if my memory correct, bummer it will be summit simple.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 12, 2018, 08:34:43 PM
B1681 code some interesting reading...no code recieved from key..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 12, 2018, 08:37:46 PM
Ah shoot, should of googled that code.
So frustrated I can't get ids to work again or that would of twigged sooner. Better start looking up wiring diagrams...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 12, 2018, 08:54:15 PM
That's the coil wiring diagram. Need to trace some wires...
They go through plug x-09. That's the one I had trouble with... (https://uploads.tapatalk-cdn.com/20181112/7a062a4b5fee381fe57fdc89d8026be0.jpg)(https://uploads.tapatalk-cdn.com/20181112/663da4646da75865c77f960296c7b47a.jpg)(https://uploads.tapatalk-cdn.com/20181112/143ea6f5fd12470d5af0bc2417121747.jpg)(https://uploads.tapatalk-cdn.com/20181112/e47dff3c9df8e2b0e2b18737447a696d.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 13, 2018, 10:51:01 PM
Think I've had a light bulb moment... IDS couldn't connect to the EPS module, and also the antenna coil. Think I'm missing the feed out of the ignition relay. Back tomorrow so will start having a look at things(https://uploads.tapatalk-cdn.com/20181113/a766e51ef905bdf52bcd40d7837cbb16.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 13, 2018, 10:57:46 PM
Sounds very plausible...fingers crossed. I know from cutting mine and Clives loom down the feeds and earths go up n down the loom and several crimp joins for earths and power once you start picking them apart..plus like you say several big block connectors...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 14, 2018, 02:47:40 PM
Coil antenna was missing an earth! We have a cranking engine! Wooooo!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 14, 2018, 03:23:45 PM
Yay!!! Well done..!!!@

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 14, 2018, 04:22:11 PM
Quote from: boosted on November 14, 2018, 03:23:45 PM
Yay!!! Well done..!!!@

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Cheers.
Does anyone know where the "chip" is located in the key? Is it in the blade section or the buttons?


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 14, 2018, 10:58:27 PM
Quote from: Paul_13 on November 14, 2018, 04:22:11 PM
Quote from: boosted on November 14, 2018, 03:23:45 PM
Yay!!! Well done..!!!@

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Cheers.
Does anyone know where the "chip" is located in the key? Is it in the blade section or the buttons?


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Problem solved. Now have working mx5 key blade with Rx8 buttons. Also works with immobiliser :)
Coil antenna earth issue sorted.
Whipped spark plugs out and gave it a good cranking. The engine sounded like it had decent compression before I took the plugs out which is good.
Probably bleed the brakes tomorrow and mock the exhaust up.
The steering angle sensor I bought off a mazda 6 doesn't fit, looks identical but has very minor differences :( ordered a rx8 one for £28 grr.
Nearly there, keep losing sight of what I've got left to do(https://uploads.tapatalk-cdn.com/20181114/fa15efb189bcbd6e39b5044fbfd046dd.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 17, 2018, 04:56:02 PM
Milestone achieved today :) tiny drop of coolant coming out of one of the hoses, nothing major :) (https://uploads.tapatalk-cdn.com/20181117/9d966e18e5480d3a4833f33aad27141b.jpg)(https://uploads.tapatalk-cdn.com/20181117/e70065c25d89ed68af70578fd778114f.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 17, 2018, 04:56:46 PM
Exhaust isn't ideal but it'll do for the mean while.
(https://uploads.tapatalk-cdn.com/20181117/35ac0db0451111e41f2684877acd1db1.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 17, 2018, 05:35:46 PM
Welldone !!!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 17, 2018, 05:40:54 PM
Where is the barometric sensor located? I think its next to the oil filler tower. It was disconnected before I started the engine but i reconnected it. So hopefully an old fault code

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 17, 2018, 05:49:57 PM
Over on drivers shock tower but can go anywhere... wouldnt start if not connected.
Looks like issues with heater circuits on both o2 sensors..id check the resistance of both
Same colour wires are heater.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 17, 2018, 05:53:36 PM
Quote from: boosted on November 17, 2018, 05:49:57 PM
Over on drivers shock tower but can go anywhere... wouldnt start if not connected.
Looks like issues with heater circuits on both o2 sensors..id check the resistance of both
Same colour wires are heater.

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Can honestly say I don't remember seeing it.
I haven't got the rear o2 sensor installed. Was going to delete it on mazda edit. Did a bit of research and the concensus was it could run without it with map mods

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 17, 2018, 05:54:55 PM
Ah.... I haven't installed that. The plug is taped up out the way(https://uploads.tapatalk-cdn.com/20181117/9dd70618ebe60955634196374a7013a8.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 17, 2018, 05:55:13 PM
Yep i only run front.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 17, 2018, 05:56:53 PM
Well running...mine neededit. Right ill check in later finishing work.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 17, 2018, 08:48:51 PM
Phew, was in the scrap pile(https://uploads.tapatalk-cdn.com/20181117/004e26cd72647cbf336470735cb2bbb9.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on November 17, 2018, 09:06:34 PM
Well done, great job  :13:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: rote8 on November 17, 2018, 10:09:40 PM
Followed this with interest a job well done :notworthy:. I admire the likes of yourself and Jon (boosted), although I was an electrician, by trade, auto electrics just passed me by :sign0085: :)).
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 17, 2018, 11:32:55 PM
All a leaving curve really, I'm a mechanical pipefitter by trade turned office boy. I didn't even know how to solder cable or use a multi meter properly. Just thinking what I can move onto next. Should really pull my finger out and fix my 205 gti instead of selling it!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 17, 2018, 11:35:27 PM
Thanks for the kind words every one

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 17, 2018, 11:38:39 PM
It's back on the floor. I've moved the coolant clip round a bit so hopefully that's fixed.
Roughly did tracking.
Don't know what to do with the front plate, be a shame to put it on the bumper!
Got to buy a battery and take her for a drive to bed the engine in. Going to limit revs to 4k on mazda edit to stop temptation (https://uploads.tapatalk-cdn.com/20181117/f898f94cc7ae3b484abcc25b07ef367c.jpg)(https://uploads.tapatalk-cdn.com/20181117/2255fd48075133ce3b7d6c21451d2b5e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 18, 2018, 05:10:03 AM
Wel done! Engine bay shot ..looks well oem! I run 2 cars with stick on plates never been pulled over.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 18, 2018, 12:24:13 PM
Better lighting(https://uploads.tapatalk-cdn.com/20181118/9c9d63055e98e813ef77ba9ae94b9f09.jpg)(https://uploads.tapatalk-cdn.com/20181118/7332aa10c2a2dda05f356d2cd18b3133.jpg)(https://uploads.tapatalk-cdn.com/20181118/db2a8d78877731d3c697c080a9168028.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: re japi on November 18, 2018, 03:19:17 PM
Good job, just amazing

Lähetetty minun E2303 laitteesta Tapatalkilla

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 18, 2018, 04:24:46 PM
I spy the 205 gti..i never had 1 "back in the day" Had a xr3i, xr2, r5gtt, Orion 1.6i ghia.Cavalier sri 130..but my mate had 1.9 miami blue that i fixed for him so drove it a few times...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 18, 2018, 04:26:01 PM
Owned a 205 of some sort for 12 years now. Time to move on

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 18, 2018, 04:30:08 PM
Problem with french cars is you need 3 elbows and tiny hands to work on them...my 93 colt gti is so 205 esqe...had it 9 years never selling as not worth a bean unlike a 205 and its a hoot to drive. (https://uploads.tapatalk-cdn.com/20181118/33d829f6f4bb60dbf33d44eaab8cd68d.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 18, 2018, 08:11:06 PM
Quote from: boosted on November 18, 2018, 04:30:08 PM
Problem with french cars is you need 3 elbows and tiny hands to work on them...my 93 colt gti is so 205 esqe...had it 9 years never selling as not worth a bean unlike a 205 and its a hoot to drive. (https://uploads.tapatalk-cdn.com/20181118/33d829f6f4bb60dbf33d44eaab8cd68d.jpg)

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Ha, true but mazda was still tricky in certain areas.
Anyone point me in the right direction of intermittent steering please?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 18, 2018, 08:17:42 PM
Lock to lock to calibrate. Lubed the hell out of UJ. Clean up contact points on plug/socket on rack. 

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 18, 2018, 08:21:26 PM
Could you elaborate on the lock to lock calibration please

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 18, 2018, 08:30:00 PM
Calibration after battery  change is literally lock to lock so it knows where it is. Light on dash will go out when its happy. The UJ is probably the culprit. Gets stiff needs a real good soaking in pentrating oil.
If the lights on theres a fault you need to scan .


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 18, 2018, 08:32:20 PM
It's literally a brand new component. I checked it before I installed it. Previous owner had it replaced.

IDS still won't connect grrr.... My obd reader isn't picking it up

Is a if the vcm2 isn't communicating with my car. I've spoke to mazda edit and they haven't got a clue. Bit of a coincidence after I read the ecu with mazda edit
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 18, 2018, 09:37:41 PM
Pulling my bloody hair out. Why won't it talk to IDS?! it was fine before connecting mazda edit.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 18, 2018, 10:56:04 PM
Are the clocks coded to the ecu? Looking at getting a replacement ecu to narrow down issues. Going at things blind without IDS

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 19, 2018, 07:38:42 AM
Clocks are not coded communicate via canbuss.
Have you looked at steering angle sensor ? Clock spring ...not much knowledge on the rx8 eps..Westy does not run it.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 19, 2018, 07:49:58 AM
I had to replace the steering angle sensor as I smashed the first one, bought another off a mazda 6 (very slightly different) and then bought a rx8 one. Pretty happy it should be fine but I'll swap the actual sensor part for my old rx8 item.

Just had a thought about the abs/dsc fault, I thought I got away with taking the abs plug apart... Might of fudged something.

Had any one got a spare rx8 abs plug with a length of wires?

Also the hand brake light is lit, pretty sure I connected the cable however

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: rote8 on November 19, 2018, 08:36:57 AM
Quote from: Paul_13 on November 19, 2018, 07:49:58 AM

Had any one got a spare rx8 abs plug with a length of wires?

Could try a call to Pete at Boston Rotary 07932 678556 keeps most things, or Lewis at LC Rotary.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 19, 2018, 08:51:54 AM
Handbrake light will also be low brake fluid warning as well. Worth checking level sensor.  You added the yaw sensor behind arm rest? Part of dsc system?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 19, 2018, 05:06:42 PM
Quote from: boosted on November 19, 2018, 08:51:54 AM
Handbrake light will also be low brake fluid warning as well. Worth checking level sensor.  You added the yaw sensor behind arm rest? Part of dsc system?

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Level sensor was fine before but I'll check. Hopefully there's no wiring differences between mx5 & rx8.
Yaw sensor is installed. I'm certain the plug is knackered, I had doubts at the time. Wish I would of changed it then.



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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 19, 2018, 05:06:51 PM
Quote from: rote8 on November 19, 2018, 08:36:57 AM
Quote from: Paul_13 on November 19, 2018, 07:49:58 AM

Had any one got a spare rx8 abs plug with a length of wires?

Could try a call to Pete at Boston Rotary 07932 678556 keeps most things, or Lewis at LC Rotary.
Thanks for the contact

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 19, 2018, 05:40:12 PM
My neighbour is a legend. Snap on scanner connects to it... (https://uploads.tapatalk-cdn.com/20181119/abb6a958d18493cf61e8c4472d19b6c9.jpg)(https://uploads.tapatalk-cdn.com/20181119/8afb7b1df7f5db888c4d0a53614abdaf.jpg)(https://uploads.tapatalk-cdn.com/20181119/a4793bba61802f944ae93f4b85ef69ad.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 19, 2018, 05:45:05 PM
U1900 EPS can bus
U2023 EPS can bus
C1155 left front wheel abs sensor


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 19, 2018, 06:00:47 PM
Can bus is the whiteblue twisted pair...only 2 wires..check good connection and the tracer polarity. I.e tracer wire connected to tracer wire..the cables look the same subtle difference....and again missing feed or earth on the eps pcm.
Abs sensor or wiring damaged.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 19, 2018, 08:39:18 PM
Brake light mysteriously sorted, or it will probably stay playing up which I start the engine. (https://uploads.tapatalk-cdn.com/20181119/98207979c18dbeaf78deddcf9967ba77.jpg)(https://uploads.tapatalk-cdn.com/20181119/f71b340f1ad63ff99295b47bc943787c.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 19, 2018, 09:56:04 PM
ABS cable has a break in it on the passenger side. Explains that one. Anyone got a spare? :D

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 19, 2018, 10:33:19 PM
Checked the can bus line from EPS to ECU and that's fine... Might be an old fault

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 19, 2018, 10:37:48 PM
Bit scorched. Guess I'll be getting another! (https://uploads.tapatalk-cdn.com/20181119/cfdd46d8cd3069dc77b392403120349a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 20, 2018, 09:01:39 AM
Looks like eps relay on battery tower?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 20, 2018, 02:43:48 PM
Quote from: boosted on November 20, 2018, 09:01:39 AM
Looks like eps relay on battery tower?

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It's the relay inside the EPS/ECU Box. I'm going to do a full check later of everything.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 20, 2018, 09:07:06 PM
Any body know what the relay is for where my finger is pointing? (https://uploads.tapatalk-cdn.com/20181120/07500ca0f5289372929a6bbc23556e22.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 20, 2018, 09:20:50 PM
Quote from: Paul_13 on November 20, 2018, 09:07:06 PM
Any body know what the relay is for where my finger is pointing? (https://uploads.tapatalk-cdn.com/20181120/07500ca0f5289372929a6bbc23556e22.jpg)

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Air pump relay.... Will be leaving that out. Wish I would double check things before ordering stuff. Got a pointless relay on its way in the post

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 20, 2018, 09:47:38 PM
Well good news, everything on the abs and EPS is correct wiring wise.
I've done a continuity test on all the EPS cables and torque sensor, all OK :)
Just waiting on electrical contact cleaner and abs sensor wire.

I double checked the abs sensor wire and no continuity which is strange, must of got damaged during swap

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 20, 2018, 09:49:42 PM
Finishing touches(https://uploads.tapatalk-cdn.com/20181120/3a9d4e48ac1c36a79d4560e63cc5b5e9.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 20, 2018, 10:11:38 PM
Taa daa(https://uploads.tapatalk-cdn.com/20181120/f8f9f4c74fbe4e0230e633464544e91a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 21, 2018, 01:14:39 PM
Lol like it .

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on November 21, 2018, 02:21:34 PM
 :)) Yeah, nice finishing touch  :13:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: rote8 on November 21, 2018, 02:57:34 PM
Likewise nice finishing touch prmoting rotaries. :sign0098:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 22, 2018, 09:45:47 PM
The earth cable was quite corroded on the EPS so hopefully that issue is sorted. Gave all the other connections a blast with contact cleaner.
New abs sensor wire is on.
Ready for a drive tomorrow :) (https://uploads.tapatalk-cdn.com/20181122/b37a3a355e0238fb01448a5e1b1e1233.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on November 22, 2018, 09:58:15 PM
Test drive   :whoo:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 22, 2018, 10:02:36 PM
A proper one this time

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 23, 2018, 07:55:29 PM
@boosted did you have to do anything to the map to make it run properly on one lambda?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 23, 2018, 08:33:30 PM
Hi mate no i didnt just got the code for it...it wont effect anything or it shouldnt...all the 02 sensor does is monitor cat efficiency...post and pre cat 02 sensor are different worth checking youve not swap them...
Whats happening? New engine expect some flashing cel misfire for a few hundred miles...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 23, 2018, 09:52:43 PM
Just prempting.
I did take for a short drive the other day and I've zero'd out the dtc's for air pump. Cat efficiency and rear o2 sensor codes.
I've set rpm limiter to 4k.increased oil injection rates slightly across the board.
Changed the dwell timing settings for d585 coils.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 23, 2018, 10:08:40 PM
Fitted these, I honestly thought they were a joke when I first saw them. But now I understand why they're needed! (https://uploads.tapatalk-cdn.com/20181123/e35a127d3d5ced2e80612857598e2c66.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 23, 2018, 10:10:27 PM
Delrin bushes? Yep good on a mk1.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 24, 2018, 06:36:55 PM
Got an issue with the speedo not working. How does the clocks receive the speed signal on uk manuals?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 24, 2018, 06:48:28 PM
Dont quote me but i was under impression via canbus and signal originates from abs/dsc module..so abs sensor dont know which 1.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 24, 2018, 08:05:01 PM
Cool cheers. Just plugged it in to the snap on scanner I don't have any signal from the rear abs sensors?!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 24, 2018, 09:06:17 PM
I've got continuity on both sensors to the abs plug.
I've compared mx5 and rx8 diagrams and it sends ad though the polarities are reversed and the sensor possibly only works one way.
Would explain why the EPS worked in reverse briefly! (https://uploads.tapatalk-cdn.com/20181124/bc580fb191d264d01b203c3921ed95a7.jpg)(https://uploads.tapatalk-cdn.com/20181124/dfd4639e46938d2cc5bef00c371be08e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 25, 2018, 08:27:45 AM
Still nothing....
Going to have a look at rx8 part numbers against mx5 for rear abs sensors.
Can't imagine they're that different?!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 25, 2018, 08:35:01 AM
Fuel gauge works :) (https://uploads.tapatalk-cdn.com/20181125/444a74779af6354845bed05ecf56bedf.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 25, 2018, 09:14:57 AM
The car i was involved in they swapped the subframes...not sure if mx or rx hubs so dont know what abs sensors on it... id be checking resistance values of rx8 compared to mx5 1s.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 25, 2018, 09:33:50 AM
Quote from: boosted on November 25, 2018, 09:14:57 AM
The car i was involved in they swapped the subframes...not sure if mx or rx hubs so dont know what abs sensors on it... id be checking resistance values of rx8 compared to mx5 1s.

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I was just thinking the same whilst driving....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 25, 2018, 09:37:12 AM
Info on the rx8 abs sensor should be on here in the technical section and im sure you got access to the mx info. Worth checking.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 25, 2018, 07:47:29 PM
Rx8 sensor should read 1.3-1.7 but mx5 sensor only reads 1.056
I've ordered some resistors to see if its a quick fix(https://uploads.tapatalk-cdn.com/20181125/e4a4c62994341786cb3d594388c87585.jpg)(https://uploads.tapatalk-cdn.com/20181125/b3238ff30eb2867e1f6da27fe58e2713.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 25, 2018, 07:51:10 PM
Rx8 shaft is on the grass
Mx5 shaft on the white background.
Both 44 teeth. But rx8 ring looks a bit deeper.
Not sure if that'll make a massive difference.
Rx8 sensors should fit but I'm not sure if it will be close enough to the ring.
Might give rx8 sensors a go failing the resistors (https://uploads.tapatalk-cdn.com/20181125/5d56e0f17a21d8eda18509aad8af852a.jpg)(https://uploads.tapatalk-cdn.com/20181125/f0ede665ab78552d5ba4f60588f4f082.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 25, 2018, 07:58:49 PM
Id get some get 1s correct resistance to work with rx8 abs...is the diameter of mx5 same as rx8? So pulses same ?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 25, 2018, 08:04:38 PM
Quote from: boosted on November 25, 2018, 07:58:49 PM
Id get some get 1s correct resistance to work with rx8 abs...is the diameter of mx5 same as rx8? So pulses same ?

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Not sure what you mean there predictive fail.
I've ordered some 1.5 kilohms resistors.

I've got the dimensions for the mx5 abs ring but can't find rx8 (https://uploads.tapatalk-cdn.com/20181125/f11311989c10ef970bc492a0d7d78848.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 25, 2018, 08:11:35 PM
I meant to say lol id get rx8 abs sensors correct resistance to work with the rx8 abs/dsc unit. My only concern would be diameter of ring so pulses are correct...and or diameter of front number of teeth etc.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on November 25, 2018, 08:23:58 PM
You should be OK the RX-8 and the NC use the same hub assembles
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 25, 2018, 08:26:41 PM
Cool. I'll just ordered rx8 sensors. Many thanks

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 25, 2018, 09:38:48 PM
Just took it for a 20 mile run up into 6th gear on the ring road, all good.
Still no speedo.
Going to limit the revs on mazda edit tomorrow. Loads of codes keep coming up, need to zero out dtc's!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 25, 2018, 09:40:35 PM
What was your recommendation for fuel additive @boosted?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 26, 2018, 06:32:10 AM
I use premix exol jaso fd 2t.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 26, 2018, 09:02:42 PM
Argh I hate getting abs sensors out(https://uploads.tapatalk-cdn.com/20181126/c94da5433de5e1cf7a3c9c16e1b48dc2.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 26, 2018, 10:18:10 PM
Did a bit more research and looks like I'll be swapping abs rings....
88mm vs 96.5 od.
Luckily they're both the same id.
(https://uploads.tapatalk-cdn.com/20181126/23b46df583c16c0f84762002f7c1efcf.jpg)(https://uploads.tapatalk-cdn.com/20181126/71e2707bc00ce7b42a426983d88f0018.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 27, 2018, 10:05:51 PM
Not the prettiest but they fit.
For the record rx8 and mx5 hubs are not the same. Rx8 has a much larger cut out for the sensor and is also sat further back away from the ring.
As it stands currently the sensor sits at the same distance from the ring as the mx5 sensor. May have to space it slightly if it won't work with mx5 ring.
The sensor reads 1.38 instead of 1.03 or what ever it was. So hopefully that'll do it. Going to test with scanner tomorrow.
(drive shaft isn't pushed all the way in that pic which is why it looks off) (https://uploads.tapatalk-cdn.com/20181127/67d029f02358e9f34b4c63799aca8ca0.jpg)(https://uploads.tapatalk-cdn.com/20181127/f8a041424ba14812e1c25d6abb3eb6a6.jpg)(https://uploads.tapatalk-cdn.com/20181127/232bc309d97825e89fceb180a2559e68.jpg)(https://uploads.tapatalk-cdn.com/20181127/d5ec5c578645bb4edde62ec1e461cdda.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 28, 2018, 07:07:45 PM
Managed to get the speedo to read :) (https://uploads.tapatalk-cdn.com/20181128/d0de4f7badf688b28ec9ea77daab3aea.jpg)(https://uploads.tapatalk-cdn.com/20181128/d4621237f499911d88b4233c65c822bb.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 28, 2018, 07:17:41 PM
Did you get the reading from manually turning the driveshaft as the piccy suggest?
Always wondered if speed signal comes from abs unit as as a sum of all 4 abs sensors or just 1..ifso which 1 as all good for knowledge.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 28, 2018, 07:19:39 PM
Just from spinning the drive shaft.
Rear right does the speedo reading :)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on November 28, 2018, 07:27:42 PM
Cool. Good to know.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 28, 2018, 10:26:33 PM
Still getting a reading with the wheel on :) better rotten those rx8 reluctor rings I bought... All £70 worth

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 28, 2018, 10:32:05 PM
For future reference if anyone has a stroke of madness and does this conversion. You have to drill out the old sensor hole to around 18-20mm.
Drill a pilot into the mx5 sensor and core through the hub. Rx8 sensor bolts straight in and connects to mx5 wiring. Leave mx5 abs/reluctor rings in place(https://uploads.tapatalk-cdn.com/20181128/cebe59c69b42232b6ee004f1e25925ee.jpg)(https://uploads.tapatalk-cdn.com/20181128/7b23795fe43e363d5d9f62971f6a4e6f.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 28, 2018, 10:33:49 PM
Hopefully this will help the noise :D(https://uploads.tapatalk-cdn.com/20181128/f19d7bc2bde8e68ab808078509e6244d.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on November 29, 2018, 10:00:32 PM
Perfect fit!
New hub nut turned up and the stand off washers to do a better job of the ppf bracket. Much happier with it now.
All that's left is the last abs sensor (https://uploads.tapatalk-cdn.com/20181129/6871335c0cded27b3f2943971e3984ea.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 01, 2018, 06:10:51 PM
:) still a dsc fault but I think I know what it is. Hopefully be sorted tonight. Limited the revs at 4k,limiter sounds cool. (https://uploads.tapatalk-cdn.com/20181201/362a395dbe1c7d6a95879dbe602d3289.jpg)(https://uploads.tapatalk-cdn.com/20181201/1e8cec27dc8bd4993ffc10ac0486e93a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 01, 2018, 10:22:40 PM
Thought I fixed the dsc fault... Light comes on when I go above 10mph still.
Did another 30 miles tonight going well

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 12:12:01 PM
Doing a bit of reading and I think the dsc light is coming on because of the difference in size of abs rings... Looks like I may have to 8 install rx8 abs rings and space the sensor away from hub

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 02, 2018, 12:20:44 PM
Whats your wheel sizes to? Not running a staggered set up? Ive come to the conclusion the dsc is never really off even when you turn it off...and the internet saying that you press and hold the button to turn completely off i believe is wrong...by pressing and holding i feel the dsc system actually logs it as a fault as its not expecting that switch input on for 10 secs...and it takes a cycle of the ignition to reset....as a fault would.
I think your gonna have to emulate the rx8 set up..the car i was involved in swapped the subframes hubs diff etc so didnt have this issue. Ill have a read through the technical manual see if i can glean some info.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 02, 2018, 12:50:46 PM
Had a read what code you get for dsc?.
There is not a code for calibration out of range...which you would think youd be getting with incorrect pulses..
Id also expect an abs light..
Code would be a help.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 02, 2018, 01:13:48 PM
The more i think about it the only component seperate to abs and eps is the yaw combination sensor.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 01:17:11 PM
I'm pretty sure it's going to be the abs rings on the driveshafts. I'm running mx5 rings with Rx8 sensors.

IDS still won't connect but I think I find a function on mazda edit that will read the codes so will give that a go. Might have to borrow neighbours snap on scanner again.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 01:18:37 PM
Quote from: boosted on December 02, 2018, 01:13:48 PM
The more i think about it the only component seperate to abs and eps is the yaw combination sensor.

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I also need to check continuity of yaw sensor to check it's getting correct feeds/earth etc

I'm not getting a abs fault only dsc symbol in my pic above

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 01:20:33 PM
But as the fault only comes up after going over 10mph makes me think abs rings.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 01:21:38 PM
Explains it I think(https://uploads.tapatalk-cdn.com/20181202/5902051d4def48e10a873eff958bd016.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 02, 2018, 01:30:56 PM
Yep i agree, just confusing that abs light does not come on...i suppose if yaw sensor was not right dcs light would come on with ignition not above 10 mph...if the dsc is more sensitive than the abs then yes dsc light and not abs...need a mazda master tecnician.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 02, 2018, 01:32:07 PM
Id go see your neighbour....test not guess me thinks...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 02:40:53 PM
Just paid a bit more attention to what the car does after I start it.

Car is off
Start car - no dsc light
Drive up to 10ishmph
Rear abs/dsc starts activating goes crazy.
Stops and fault light appears.

Speedo also over reads pretty bad.

Mazda edit will not read code.

I think it's the rear abs ring diameter is too small and the difference is triggering the dsc.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 02, 2018, 02:57:08 PM
Whats the plan now then?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 03:04:02 PM
Install rx8 abs rings and use neighbours snap on scanner. Should be it

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 02, 2018, 03:07:12 PM
Coolfingers x

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 06:34:26 PM
Getting an expert at this. Took 25 mins to get to that point. Need to get to the bottom of the p0032 fault code as well(https://uploads.tapatalk-cdn.com/20181202/c9d46e7c2a215710f6fdf838ea7bf3c0.jpg)(https://uploads.tapatalk-cdn.com/20181202/ebe490037be45c40a917a34f788973be.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 02, 2018, 07:13:29 PM
Front 02 heater circuit...the 2 same colour wires...its a heater to warm up the sensor to get it up to temp quicker and from open to closed loop control as quicker as poss.
Need to ohm test, if its open circuit then replace. Or turn it off with mazda edit.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 07:18:15 PM
Bought a new lambda as well, should of done that to begin with!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 02, 2018, 07:26:08 PM
Direct wired to ecu via the engine loom...so doubt a connection...wont have a running effect....exhaust off a rotary is alway hot lol.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 07:44:13 PM
Quote from: boosted on December 02, 2018, 07:26:08 PM
Direct wired to ecu via the engine loom...so doubt a connection...wont have a running effect....exhaust off a rotary is alway hot lol.

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The o2 was an reportably a working item, but probably an error. No offence to the seller BTW who is on here, it was free!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 07:50:54 PM
@boosted did you leave your rear o2 sensor unplugged? Any problems?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 08:02:47 PM
Also does any one have a rx8 drive shaft they can measure? Need the I. D. of the abs ring. Just want to double check before I take off the mx5 items

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 02, 2018, 08:05:37 PM
Cut mine out of loom no issues. Mines been mapped out light turned off although i havent got a engine check light lol ..all a post rear o2 sensor does is monitor the cat and check its working...
The front 02 sensor is the key 1 it runs the car when in part throttle cruise etc. Wot its not used uses the fuel map in the pcm..read summit in the states about disconnecting and running fuel map all the time but not brave enough to try my car gets used on road too so what it smooth in cruising and part throttle pulls. Cant really use wot on public roads will end in my tears...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 02, 2018, 09:38:32 PM
Good to know.
Must be dodgy o2 sensor, just traced all wires and all good.

Also just traced all of the dsc yaw sensor wires and they all match up. Yay

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 03, 2018, 04:58:09 PM
ABS rings are here. Fit them later(https://uploads.tapatalk-cdn.com/20181203/68e1906444aff3d06630e8d1a2000fae.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 03, 2018, 05:00:03 PM
Fingers x do the job.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 03, 2018, 07:46:21 PM
Well that come off easier than expected(https://uploads.tapatalk-cdn.com/20181203/763a51af66df091ce013aae2121b399b.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 03, 2018, 07:55:03 PM
Blowtorch? Interference fit?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 03, 2018, 07:58:20 PM
Polish up! Xmas pressie bangle for the mrs? Get a fancy box unobtanium!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 03, 2018, 08:01:36 PM
Ha.
No gear puller. Haven't put other one on yet

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 03, 2018, 08:46:05 PM
1 down(https://uploads.tapatalk-cdn.com/20181203/8fe4d4839390fd6f7d1c9820b0748d05.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 03, 2018, 09:01:21 PM
Mx5 vs rx8 ring.
Rx8 ring fouls hub.
Grinder will be out shortly(https://uploads.tapatalk-cdn.com/20181203/71595a838b6b40fe036cddb976439013.jpg)(https://uploads.tapatalk-cdn.com/20181203/8cfc0f5c8c82f40381fb9c11ce8d9918.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 03, 2018, 11:14:43 PM
Rings now clear. Got to space abs sensor away from hub(https://uploads.tapatalk-cdn.com/20181203/6355a2693fcf857cbf98c5df4d4d1ed4.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 04, 2018, 11:15:35 PM
We have a reading!
All back together, fitting new lambda tomorrow :) (https://uploads.tapatalk-cdn.com/20181204/830d9f60ca4963d5439a45c2e0d7d192.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: re japi on December 05, 2018, 05:10:47 PM
Good job!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 05, 2018, 10:13:32 PM
Still getting the traction control light showing up...
I did these codes the other day when I scanned it but some are probably old.
The dsc switch failure is from where I kept it pressed down for ages to bring the 2 lights up.
Communication error was from missing speedo signal.
The only one that I think could be causing the dsc fault is the dsc steering angle sensor.
The tracking is a mile off at the moment, maybe that's got diverging to do with the light coming on. Abs isn't juddering on this time(https://uploads.tapatalk-cdn.com/20181205/32c21671d454fc279be6a1219a92687a.jpg)(https://uploads.tapatalk-cdn.com/20181205/333fc9762453580c287c5b4de9010fb2.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 06, 2018, 08:43:41 AM
Seems as though bad tracking could cause it to go hay wire(https://uploads.tapatalk-cdn.com/20181206/fe1e4fb78caf459b04a623bf87157664.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: re japi on December 06, 2018, 11:02:07 AM
Good thing that Jon is around here. I dont know absolutely nothing about those things

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 06, 2018, 06:29:06 PM
Been off grid at work pretty much allday Im with 02....
Not had much dealing with the 8s eps...
But yes rack positive and steering wheel position must stay in sync.. so if there is a difference...then that is offset...
This is the rx8 rack ?
Gotta start with steering wheel angle sensor and then the position sensor in the rack itself...


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 06, 2018, 10:26:32 PM
It is the rx8 rack yes. We did reset the neutral position (thinking about it that could be the issue!) and the reset dsc trick.
The tracking is a mile out though.
Nearly crashed as I aqua plained on the m3 earlier. Literally threw me into the hard shoulder. 1 wheel did not have grip for several meters. Really shit me up. I've booked it in to go to wheels in motion.

I had a similar issue on the 330i (same abs pump pretty much) tracking was a mile out and the dsc was triggering.

No other faults than that though apart from P0076 intake solenoid, need to look that up.

Fuel gauge works perfectly :) shows how fast this thing gulps fuel. (https://uploads.tapatalk-cdn.com/20181206/3fb4ef2655ecac9f0b90a13d53f0d304.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 06, 2018, 11:11:33 PM
Quote from: boosted on December 06, 2018, 06:29:06 PM
Been off grid at work pretty much allday Im with 02....
Not had much dealing with the 8s eps...
But yes rack positive and steering wheel position must stay in sync.. so if there is a difference...then that is offset...
This is the rx8 rack ?
Gotta start with steering wheel angle sensor and then the position sensor in the rack itself...


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Just a thanks for all your help so far and others in here much appreciated!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 07, 2018, 08:16:02 AM
No worries mate! Yep get that tracking done, dont risk the car esp. With this awful rain were having. Plus the dsc will brake the rear wheels if putting power down and it thinks your losing traction...shows up on an 8 with ditch finder tyres on the rear,  need to get it sorted before 9k time...if youve got a lot of rear brake dust tells you its working the rear calipers.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 07, 2018, 11:21:48 PM
Did the tracking roughly with 2 bits of wood, bricks and measuring tapes.
Wheels are parallel, hopefully centre of rack.
It was a mile out, toe in massively (20mm difference between front of when to back)
Also replaced lambda.

Take it for a test drive tomorrow

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 08, 2018, 11:03:25 PM
Still getting dsc code 1937. Steering wheel angle offset sensor failure...
I've replaced this with an item I bought on ebay and considering its on the CAN system the serial numbers don't match up? Causing the fault? Just a thought

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 09, 2018, 12:02:29 AM
Think I've figured it... When I put the deep dish steering wheel on (when it had the mx5 engine and no dsc) I put it on upside down... Bloody idiot.
The slot for the cables should be at the bottom not the top. Would explain why the indicators don't cancel as they should and the dsc keeps playing up. Doesn't help I rounded a screw off and snapped the Allen head in the other(https://uploads.tapatalk-cdn.com/20181209/da5199413cea17cecb10c5acfd52f860.jpg)(https://uploads.tapatalk-cdn.com/20181209/d238c598e42c09700d7113bbb31c316a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 09, 2018, 04:22:05 PM
Fixed! (https://uploads.tapatalk-cdn.com/20181209/c25e7b5ad197f6f16a22337feb25a535.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 09, 2018, 04:38:47 PM
Yay welldone..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on December 09, 2018, 04:45:06 PM
Nice find  ;) ;D
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 09, 2018, 06:16:14 PM
Dsc ring was 180' out. Dsc is quite sensitive, might need to change tyres and get tracking done properly

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 09, 2018, 10:33:59 PM
303 miles covered now :)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: rote8 on December 10, 2018, 08:59:04 AM
 :13:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 13, 2018, 10:43:45 PM
Still getting p0032. I've checked all wire connections and I'm getting a 0.32 ohm resistance reading on what should be the sensor earth back to the ecu... Something not right there. I'll just zero out the dtc I think.
550 miles in now :)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 19, 2018, 04:51:20 PM
Back from Italy... Holiday from hell with a 2 year old.
Went to WIM earlier to get the tracking done.
Rear left was out a fair whack annoyingly. I did hit a kerb earlier on in the year but instead of the wheel gaining more positive camber its got negative and the camber bolts are fully adjusted so it won't straighten out fully...
720 miles in now. Going to try and get it up to 1000 in the next couple of days and then take the 4k limiter off.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 19, 2018, 04:52:23 PM
Don't know what I did on IDS but it magically started working after a lot of buggering about. (https://uploads.tapatalk-cdn.com/20181219/a8ace4bb159a074a89036cdc7531667d.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 19, 2018, 04:53:24 PM
Also is it possible to swap solenoid valves? My vdi one is faulty how've I'm not using the secondary air valve solenoid. (https://uploads.tapatalk-cdn.com/20181219/3f67135d63d3233c3cd6ef3d7fa20656.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 19, 2018, 04:57:32 PM
Yep you can swap them...ive closed the pins up on mine with pliers as had a bad contact and misfire .

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 19, 2018, 05:06:04 PM
Interesting...
I'm getting a weird sensation when I back off accelator or apply softly when moving... Its like a fluttering sound. Almost like a actuator flittering on and off rapidly.
Don't know of its related or rx8's "just do that"

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 19, 2018, 05:08:27 PM
At all revs?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 19, 2018, 05:12:25 PM
Yes, however it's still limited to 4k currently

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 19, 2018, 05:16:50 PM
Mmmm the switch over off the ports is very subtle and at 4k your not switching anyway...cant remember the switch points offhand..think 4500 and 7500.
Not sure tbh

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 20, 2018, 06:04:44 PM
Just about to tick over 1k. Going to dump the oil and change the oil filter. Also Raise the rev limit if I get the go ahead from Carl :)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 20, 2018, 06:10:34 PM
Woohoo fun time.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on December 20, 2018, 09:12:21 PM
It may be an idea to check that Intake Manifold SSV Secondary Shutter  valve is free and not carboned up as it could be the actuator trying to work it that's making that noise  you describe.

This is what it looks like out of the lower inlet
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 20, 2018, 10:16:38 PM
The only other thing is the vfad...have you capped the vac line at the manifold?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 20, 2018, 10:31:43 PM
Quote from: boosted on December 20, 2018, 10:16:38 PM
The only other thing is the vfad...have you capped the vac line at the manifold?

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I have yes.
I'll check the vdi actuator etc.
Got a misfire code come up now
P0301 joy(https://uploads.tapatalk-cdn.com/20181220/8b4c6922ba03f49e9db6acce4c64440e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 20, 2018, 10:39:33 PM
Oh the joys of p0301 and p0302.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 20, 2018, 10:43:57 PM
Coincidently pops up after I've just created a fire ball in the back box. It's this something I need to be worried about? Seems as though you know a bit about the codes

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 20, 2018, 10:56:33 PM
As you begin to use full revs on fresh rebuild and few codes for misfires are likely to occur.
Id be inclined go do another relearn 20 brake stomp to.
In what instance?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 20, 2018, 11:00:32 PM
Quote from: boosted on December 20, 2018, 10:56:33 PM
As you begin to use full revs on fresh rebuild and few codes for misfires are likely to occur.
Id be inclined go do another relearn 20 brake stomp to.
In what instance?

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I did the ecu reset on the way home. Still showed P0301.
Only thing I think it might be is I tweaked the coil pack dwell settings to the ones I found on rx8 forum. Wonder if that's causing the problem.
Didn't have any faults with the engine in the rx8 with standard dwell settings.

Or do I stop fooling around and buy new packs and leads

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 20, 2018, 11:02:40 PM
D585s?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 20, 2018, 11:07:05 PM
Quote from: boosted on December 20, 2018, 11:02:40 PM
D585s?

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Yesh

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 20, 2018, 11:15:20 PM
Go back to original setting?..ive got geniune oem rev c,s
D585s still fail though.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 01:47:07 PM
Quote from: boosted on December 20, 2018, 11:15:20 PM
Go back to original setting?..ive got geniune oem rev c,s
D585s still fail though.

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Right that's original settings back on and stomp reset done.
The car is still really quite juddery and spluttery on idle. I take that isn't normal. I'm used to idi diesels you see, not petrol cars

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 01:50:52 PM
Definitely misfiring slightly. Held revs at 3k and every now and again it pops.
Is now dropped down to idle and its mis firing every 5 seconds and struggles. Idle then raises back up

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 01:56:40 PM
Looks like Ht leads might be culprit... (https://uploads.tapatalk-cdn.com/20181221/2edac89d2740a8d37615c908b65d13bc.jpg)

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I haven't taken the others off yet
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 02:00:54 PM
No not good...should be silky smooth rotary lovelyness..

So believe the code then which is misfire..
Flashing engine light is realtime active misfire.
So like any car diagnose misfire. Coils leads plugs fuel and air.
Do the basics first..plenty of fuel? Leads on nice and secure?
Then move on plugs getting spark etc you can swap coil pack around too. You have a 1 rotor misfire indicated by code swap the pair front rear see if code moves and swap leading to trailing...leading does majority of work.
D585 have failed. Also check the connections on the sub d585 loom and the earth connection.
With any fresh build pretty good idea to fit brand new coils...
Its big debate in other places but im a firm believer in oem. Rev c not heard any fail yet...
If you get stuck ive got a diagnose used good set of rev b.
Fingers crossed.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 02:03:34 PM
Smoking gun that!!!  Resistance check for end to end continuity? Wrap up in insulation tape til you get another set? Move that leads coil to trailing..mx8 xmas lights in the dark...
These magnecors?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 02:05:03 PM
I had flashing light for misfire.
Leads I wasn't overly happy with, some didn't feel great. Coils have 40k ish on.
Plenty of fuel.
Not checked fuel pressure but will do.

I did check all sub loom connectors and they seemed to be OK.

Going to pick up a set of Ht leads from euro car parts. Hopefully they fit.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 02:06:32 PM
Quote from: boosted on December 21, 2018, 02:03:34 PM
Smoking gun that!!!  Resistance check for end to end continuity? Wrap up in insulation tape til you get another set? Move that leads coil to trailing..mx8 xmas lights in the dark...
These magnecors?

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They are magnacor annoyingly. Previous owner really did not look after the car.

What's rev c and rev b?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 02:07:06 PM
D585 have a different coil connection to oem
Not sure euro will be upto speed with mods...
Rotary Revs is probably you best bet for new set sent quickly.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 02:08:09 PM
Oem coils had uogrades from mazda a b and c. C being latest revision.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 02:11:42 PM
Quote from: boosted on December 21, 2018, 02:07:06 PM
D585 have a different coil connection to oem
Not sure euro will be upto speed with mods...
Rotary Revs is probably you best bet for new set sent quickly.

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Ah that's what I wanted to hear. Saves me £50...cheers

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 02:14:50 PM
Any one had any dealings with these coil packs?

Really want to use the car over Christmas! (https://uploads.tapatalk-cdn.com/20181221/2c28469d546f121992de25b970e300d6.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 02:23:58 PM
Nope...oem or not atall when it comes too std coils.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 02:24:21 PM
Give Clive MRP a bell.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 02:32:01 PM
MazdaRotaryParts.com.
Clive on here if you didnt know company.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 03:45:30 PM
Thanks. Tried ringing. No answer

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 03:54:50 PM
Id wait for Clive..as a member youd get discount and he will send out quick over chrimbo for you.
So you want to use car.
Id resistance check end to end to make sure ok...the fact the insulation has broke down suggest some mishandling damage and the lead has been arching done to earth.
If you can restore that insulation with insulation tape...gert fatty wrap...should be fine to use.
Mazda state 30k on plugs...i change at 9k. Rev c coils should be good for 25k plus. D585s are good our r3 had them but never started good always rough idea til warmed up abit ..i swapped to oem and lovely.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 04:00:23 PM
I called mazda in little wick Green. They have a full set of rev c and Ht leads. Just got to get over there to pick them up. Currently lumbered looking after daughter... They close at 6pm. Might be a grand parent favour coming on :D

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 04:10:54 PM
Lol. Good luck.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 05:19:41 PM
Mazda couldn't find the HT leads, so here I am at euro car parts buying back the HT leads I returned earlier!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 05:43:09 PM
Coils main thing leads will be fine from euro.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 06:09:41 PM
Coils are at my nans, rev c :)
You got to love grand parents.
Cost an arm and a leg, I wish I weren't so impatient some times

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 06:13:58 PM
I shudder to think...always had a beef with Mazda about the cost...there none to fail and kill rotary engines...mazda are rotary engines yet they fail to set a realistic price that allows owners to change as a precaution maintenance ite.m the VAG 1.8 turbo 20v also has a habit of coils failing...there £20 ea from main dealer....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 09:08:16 PM
:) (https://uploads.tapatalk-cdn.com/20181221/97beb94a7fbef3831f0514f2ed7c567b.jpg)(https://uploads.tapatalk-cdn.com/20181221/6d5507c4268d60e3498ed4467838524e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 09:16:43 PM
Cool.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 09:34:29 PM
I think it was a lead issue. Looks like it was not seated properly. Coils look alright otherwise(https://uploads.tapatalk-cdn.com/20181221/9b5c152d4807bc428328300a801518b3.jpg)(https://uploads.tapatalk-cdn.com/20181221/775e081e5ff77864ceb83bf35fb68ade.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 09:37:15 PM
Do I need to do anything extra? Already got insulating stuff on there(https://uploads.tapatalk-cdn.com/20181221/2309f66ccda9c0966227719c8277f07e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 21, 2018, 09:39:47 PM
No.got the insulating material all good.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 10:18:29 PM
BOSH(https://uploads.tapatalk-cdn.com/20181221/7a4c5521c452b7b9dd52c7f61af954e6.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2018, 10:54:31 PM
Stomp reset done. Fingers crossed

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 22, 2018, 03:47:59 PM
The engine revs up well now but still stutters very slightly on idle. Need to clean up the plugs I think. One thing I haven't done.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 22, 2018, 07:44:24 PM
Id leave plugs..couple of drive cycles idpe should improve.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 23, 2018, 10:06:00 AM
:) goes some. Can you up load videos?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 23, 2018, 11:53:10 AM
I upload to youtube and link from there..be good to see a vid or 10 lol.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 23, 2018, 12:04:07 PM
Quote from: boosted on December 23, 2018, 11:53:10 AM
I upload to youtube and link from there..be good to see a vid or 10 lol.

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No really a fan of putting driving videos on YouTube incase they get used against you lol. Might have a look at other platforms

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 23, 2018, 12:09:34 PM
Yep i agree...Casey the techie man .

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 23, 2018, 12:10:51 PM
Cant remember...you got the 8 diff in there or the mx5 1...what ratio is the 5 1?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 23, 2018, 01:03:33 PM
Kept the mx5 diff.
It's a 2.0 5 speed lsd.

4.3 ratio instead of 3.91

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 23, 2018, 01:07:57 PM
Cool.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: exiled-viking on December 23, 2018, 02:06:24 PM
interesting to see lost of people going back to mazda Coils rather than going for some of the other makes out there mind you mazda have improved them some what but its the price of coils that gets me ........
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 23, 2018, 02:07:52 PM
Quote from: exiled-viking on December 23, 2018, 02:06:24 PM
interesting to see lost of people going back to mazda Coils rather than going for some of the other makes out there mind you mazda have improved them some what but its the price of coils that gets me ........
I heard a bit of a rumor of where the d585 are actually sourced which has put me off slightly.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 23, 2018, 03:25:07 PM
The list of getting smaller. Weirdly the vdi fault P0076 hasn't popped back up...
Need to get some Ht lead coil wrap. Think something isn't right on idle still(https://uploads.tapatalk-cdn.com/20181223/fce7c475c0b72c3dce920c3668bbcb48.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 23, 2018, 04:16:30 PM
I think I have figured the mis fire issue.... I shouldn't mess about with things but I increased the oil injection rate of the omp on idle, the plugs are probably soaked in oil

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 23, 2018, 05:47:43 PM
Quote from: Paul_13 on December 23, 2018, 04:16:30 PM
I think I have figured the mis fire issue.... I shouldn't mess about with things but I increased the oil injection rate of the omp on idle, the plugs are probably soaked in oil

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Better straight away! Lesson learnt don't mess with things you don't fully understand (yet)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 23, 2018, 06:13:46 PM
I dont use mine atall..its still plugged in so doesnt go into limp but block is plated over...i premix only now and that means i can run 5w40 fully sythenthic oil.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 23, 2018, 06:16:27 PM
Is limp mode noticeable on these engines? Rev limiter?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 23, 2018, 06:18:47 PM
Yep no more that 4500 revs and very flat no power.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 24, 2018, 04:44:17 PM
Not convinced with these HT leads from euro car parts. Felt loose on one of the plugs. I've put cable conduit over the leads where they were touching other parts.

Think I'll be ordering others

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 24, 2018, 06:22:51 PM
Clive will have magnecor leads in stock id give him a bell after xmas break.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 25, 2018, 10:59:21 PM
Surprising how fast this car is.
Hyundai i30 N 68 plate (270hp) didn't have a chance off the lights.
He was that embarrassed he wouldn't pull up next to me, instead he pulled off the ring road behind a police car. Made my evening!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 26, 2018, 12:34:44 PM
Desperately needs a clean! (https://uploads.tapatalk-cdn.com/20181226/9ebcbc9669ac684ae69c2cc9fe14b684.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 26, 2018, 12:35:23 PM
Quote from: boosted on December 24, 2018, 06:22:51 PM
Clive will have magnecor leads in stock id give him a bell after xmas break.

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Sent Clive an email, not trading till after Christmas. I can wait

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 26, 2018, 12:55:35 PM
Quote from: Paul_13 on December 26, 2018, 12:34:44 PM
Desperately needs a clean! (https://uploads.tapatalk-cdn.com/20181226/9ebcbc9669ac684ae69c2cc9fe14b684.jpg)

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Now is that a 3.5 or 3.75?
I know my mk1s but not so much on mk3 nc's

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 26, 2018, 12:59:05 PM
Mk3.5 or NC2 as the yanks call it.
2010 reg.
20th anniversary.

Its a cat c. Had an impact early on in life @ 26k miles. All air bags went off.
Front end doesn't like great but it will do!


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 26, 2018, 01:01:59 PM
Nothing wrong with abit of salvage...my scoobys a cat C and my colt a cat D. Had loads of the years, theres a copart 5 mins from my house i was in there viewing a potential purchase friday.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 26, 2018, 01:04:36 PM
Just annoyed an 18 plate ford focus rs. Love this car

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 26, 2018, 01:10:22 PM
Lol...strange that rx8s dyno lower than quoted figures but they go up the road pretty well. Had a few scalps myself with Rx8s over the years especially involving bends.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 26, 2018, 01:28:21 PM
Quote from: boosted on December 26, 2018, 01:10:22 PM
Lol...strange that rx8s dyno lower than quoted figures but they go up the road pretty well. Had a few scalps myself with Rx8s over the years especially involving bends.

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It does go pretty well.

Still going easy with it to be honest. Had a pretty serious crash when I was 18 and stupid. 115mph into 10 trees one after another. Very lucky to be alive.
Won't be doing that again.
Can find the photo of the front of the car, that was a sight to see. I ripped the engine clean out and cracked the inlet manifold in 2.
(https://uploads.tapatalk-cdn.com/20181226/3de54f66bd2f9e23f5a8245b4b5206cb.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 26, 2018, 01:48:13 PM
Scary...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 26, 2018, 01:54:10 PM
Is there any recommended things to do on mazda edit with the map or leave well alone?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 26, 2018, 02:03:24 PM
I sent my pcm off to a guy on the rx8 forum. He did the basics like turning off 10 engine codes i only sent away as i wanted a 1100 rpm idle as at 850rpm i was getting 10psi oil pressure when oil hot...bit scary lol...so with 1100 rpm it does not get lower than 22psi and pretty good anti stall. Plus an unexpected bonus it cools down quicker idling.

I think some guys lean off for power increase but i wouldnt recommend that..
Then theres oil injection rate but i have no knowledge how to do that.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 26, 2018, 02:06:28 PM
I'll probably raise idle based on that. Cheers.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 26, 2018, 02:09:04 PM
The clutch switch raises idle as well so if anything funny happens look into that side of things.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 26, 2018, 11:17:10 PM
... No caption necessary(https://uploads.tapatalk-cdn.com/20181226/a826823717191b473decc2c5a39957ea.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: re japi on December 27, 2018, 09:13:58 AM


Lähetetty minun E2303 laitteesta Tapatalkilla

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 27, 2018, 02:57:15 PM
Or add your own caption...?

"Whos be overdoing it on the Sprouts"

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: re japi on December 27, 2018, 02:59:53 PM
Cant wait to get my car to split fire. And hopefully without apexes might turn screamer pipe towards pedastrians (dunno did I typed that right)

Lähetetty minun E2303 laitteesta Tapatalkilla

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 27, 2018, 09:40:40 PM
The coils must of done the trick, no more P0301 codes.
Also mazdaedit now do launch control :) just waiting for the guy to get back to me.

Think the exhaust is also holding it back, going to look at fabricating one, might cut off the exhaust manifold flange where it tapers down and carry on the pipe size straight through. Probably be 2.75/3" all the way through.

@boosted : by the way the idle raise has worked a treat. 1k idle now and all of the stuttering has mostly dissappeared.

Is there a oil temp sensor on the rx8 s1's? Can't find it on my obd reader. Surely it must have one!



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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on December 27, 2018, 10:07:39 PM
No oil temp sensor . I find oil temp lags coolant temps by 10 deg c for 15mins...without an oil thermostat.
If you fit a sandwich plate on oil filter housing you can monitor oil press and oil temp. Essential if going on track not so much on road.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 28, 2018, 09:21:18 AM
Quote from: boosted on December 27, 2018, 10:07:39 PM
No oil temp sensor . I find oil temp lags coolant temps by 10 deg c for 15mins...without an oil thermostat.
If you fit a sandwich plate on oil filter housing you can monitor oil press and oil temp. Essential if going on track not so much on road.

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Madness, can't believe mazda didn't fit one.

Had a response from mazdaedit/epifan... Not available yet. Does any one else find him extremely rude? Or maybe its the language barrier

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 28, 2018, 09:33:30 AM


Quote from: Paul_13 on December 28, 2018, 09:21:18 AM
Quote from: boosted on December 27, 2018, 10:07:39 PM
No oil temp sensor . I find oil temp lags coolant temps by 10 deg c for 15mins...without an oil thermostat.
If you fit a sandwich plate on oil filter housing you can monitor oil press and oil temp. Essential if going on track not so much on road.

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Madness, can't believe mazda didn't fit one.

Had a response from mazdaedit/epifan... Not available yet. Does any one else find him extremely rude? Or maybe its the language barrier

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He's now offered to make it for $50 :)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on December 28, 2018, 11:49:20 AM
Excellent progress, loving the flamage  :violent5:  :thumbsup:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 28, 2018, 04:36:03 PM
Pre mix has arrived.

Launch control activated, see what that's like later(https://uploads.tapatalk-cdn.com/20181228/814c74a83ea913538e22b702c29029c7.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 28, 2018, 04:36:48 PM
Catch tank is filling up quick. Must be all the cold weather (https://uploads.tapatalk-cdn.com/20181228/ca3a6b3d496025b40cf4d860784232cb.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 31, 2018, 05:10:41 PM
I spotted a small patch of oil underneath the car earlier and peered through the bumper....
I've had 2 no 90' 10an fittings fail simultaneously. Great.
Glad I spotted it.
(https://uploads.tapatalk-cdn.com/20181231/1c7dc9b8874a6a60ffcc21f7b3dbb8e9.jpg)(https://uploads.tapatalk-cdn.com/20181231/21d81a78561fd87a571b29eb67f89029.jpg)

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(https://uploads.tapatalk-cdn.com/20181231/95c6e0d347cabb4bc96ed7d39ff59452.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 01, 2019, 07:43:22 PM
Gone for a slightly different design from an English manufacturer /seller.
Tight 90' instead of pulled bend. I think the pulled bend had deformed the seat of the swivel.
Hopefully the nut swaps over as I doubt I'll get that off the old pipes(https://uploads.tapatalk-cdn.com/20190101/d9b298fb952bc5d88879a508910a1bc7.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 04, 2019, 10:38:02 PM
Back up and running. All seems good.
It has the odd spell where it is a bit boggy and pops on great change but seems to clear. The injectors are probably tired

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 05, 2019, 06:08:04 PM
I'm looking at installing oil pressure and oil temp digital guages below the stereo.
What do I need the oil temp gauge to read to? 110'c or more?
I've know what I'm doing with the sandwich plate, that's fine.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on January 06, 2019, 07:36:33 AM
0 to 150 pressure and temp or thereabouts.
Max temp 110 at a push 115...depending on oil used.
Ideally you want see oil above 80deg c normal running.
And pressure above 100psi on a pull...its idling that was my concern at 850 idle rpm oil pressure is low..on my car in the teens hence the 1100 rpm i have.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 07, 2019, 09:19:16 PM
Ok cheers ill look into it.
It hesitated really bad changing gear accelerating hard yesterday. Need to try and figure out what it could be.

What symptoms did you have with the mx5 you converted?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 07, 2019, 09:36:22 PM
Is that what you meant by the regulator mod boosted? (https://uploads.tapatalk-cdn.com/20190107/e7858985c90193125a6db3bf49d78004.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 07, 2019, 09:40:06 PM
That's the mx5 pump equivalent (https://uploads.tapatalk-cdn.com/20190107/19abf04b35d26affdd568a592b688b61.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on January 07, 2019, 10:23:33 PM
Yes thats its...
The 1 was involved in was fine for the few miles i had.
Hesitate to change gear? Or hesitate to rev?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 07, 2019, 11:28:13 PM
It was hesitant after changing gear for a split second when the throttle was flat down

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on January 08, 2019, 05:27:14 AM
Could be anything mate tbh..anything on code read?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 08, 2019, 12:31:36 PM
Nothing...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 13, 2019, 08:14:54 PM
An I right in thinking that I won't get the STFT or LTFT as I havent got the narrow band lambda fitted?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on January 13, 2019, 08:18:15 PM
Standard precat o2 sensor should give you the fuel trims. The pre and post 02 sensor are different...got the right 1 ?
Are you still having some gremlins?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 13, 2019, 09:27:22 PM
It was just out of curiosity really. Definitely right sensor or I wouldn't be getting afr readings.
Things went OK tonight, took it for a run. Badly need new tyres, these are death traps. Rear breaks loose without reason on small corners.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on January 20, 2019, 07:12:41 PM
Still waiting on a vid or 2 ? Nothing incriminating of course!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 20, 2019, 07:42:39 PM
See if this works
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 20, 2019, 07:43:25 PM
Quote from: Paul_13 on January 20, 2019, 07:42:39 PM
See if this works

You need vlc player if viewing on phone
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on January 20, 2019, 07:47:47 PM
It downloaded to my phone but failed to play...ill look when at laptop.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 20, 2019, 07:57:09 PM
You need to download vlc player on app store. Mpg format

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on January 20, 2019, 08:08:42 PM
Will do after the snooker..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on January 20, 2019, 09:02:01 PM
No Dice on laptop....just got sound.... :great: need access password which ive forgotten to download codec software :violent1:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 20, 2019, 09:06:26 PM
Download VLC player on the play store(https://uploads.tapatalk-cdn.com/20190120/686c9cc64cf69044260d9e000be74adc.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on January 22, 2019, 10:23:18 AM
Got it!!! finally after trying quite a few blimin passwords  :13: goes well!!! you got no rev limit beep? some of my 8s didnt beep.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 22, 2019, 04:37:27 PM
Didn't take it high enough! It still beeps!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on January 22, 2019, 06:14:19 PM
Yep, it certainly seems to accelerate well in that vid  :13:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 22, 2019, 06:55:24 PM
That'not even full throttle to be fair. Was a bit sketchy that road.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 25, 2019, 07:46:14 PM
Drive it to work this morning. Going well :) might get tyres this weekend if I get chance.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 09, 2019, 12:50:13 PM
Still got the hesitation under hard throttle. Need to yank the pump out

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 09, 2019, 01:19:24 PM
if your gonna pull it out may as well stick a walbro in there. Clive has them at MRP.  what rpm is the hesitation?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 09, 2019, 01:37:08 PM
tried googling fuel flow ratings....fail....so went for fuse ratings of fuel pumps...i.e current draw being directly relatable  :violent1: Rx8 fuse pump rating is 20amp...What is a fuse rating of  mk3 mx5?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 09, 2019, 01:44:26 PM
found it, mk3 and 3.5 fuel pump fuse rating is 15A....so with fuzzy logic must be smaller pump.... :dontknow:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 09, 2019, 02:39:34 PM
I went for a uprated pump in the end. I think the pop off valve is causing me issues

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 09, 2019, 02:57:04 PM
I fitted a gauge on mine and could see when booting it going from 4bar down to 2.5bar...i had a hole in the white convoluted pipe id fitted...rather than warm up ends in hot water to fit i flashed with a heat gun...tiny hole.
The pop off i was led to believe is a very rare occurence and when it goes it comes off completely.
I bought a little systec inline adaptor and gauge in expensive showed me what was going on..
Could still be you port opening? Early 8s did not have a fault code for the ssv in the pcm...my car had the sensor but not the code i only discovered by changing pcm...
You should be able too see it with mazda edit i would have thought?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 09, 2019, 03:01:34 PM
Easy check of vacuum chamber is pull the vac line off ...should make a psst noise as air rushes in. Unstarted as vac is stored...and could swap vac lines out to vdi ssv and air pump...plus the plugs as solenoids all the same...just dont mix them up...that would rule of vac leak and solenoids.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 09, 2019, 03:14:31 PM
I did have a ssv fault a while ago but I thought that had fixed itself. I bought a hand held vac pump so I'll test it.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 09, 2019, 03:16:49 PM
Worth checking...only take 10 mins...
Before pulling fuel pot which is a pain if you get the systec tester and it stays at 4bar all the way to redline you know the fuel system is good...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 09, 2019, 03:22:17 PM
Handy diagram (https://uploads.tapatalk-cdn.com/20190209/5dbf0e38fa1750e0a9297930a64c8a4c.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 09, 2019, 03:24:07 PM
Yep. Got that printed out.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 04:00:48 PM
I've checked both actuators seem free. One is a bit squeaky, going to spray with lube.
Vac Reservoir  is holding fine.
1 way valves round correct way.
Only thing I can think of is a sticky solenoid.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 04:11:50 PM
Static there is no way to test as not seeing rev range. However if you put 12v on the soleniods they will work.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 04:20:48 PM
I did have p0076 before. I'm going to swap the vdi solenoid for the unused vfad

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 04:23:08 PM
Or the airpump if not using it?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 04:39:56 PM
Quote from: boosted on February 10, 2019, 04:23:08 PM
Or the airpump if not using it?

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Sorry that was the one I meant.
Do you know which plugs do what on the solenoids?
Blue, Black & White plugs

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 04:41:12 PM
Its on the drawing mate..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 04:43:35 PM
The plugs are blue red green..the soleniods are black...worth following coloured plug to black vac line to vdi ssv etc.
And if you not using airpump. Pluging the vac line.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 04:44:39 PM
Not for me? (https://uploads.tapatalk-cdn.com/20190210/3af70c11cff2e22996febc9249c59225.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 04:45:35 PM
Ill go and look at my car...lol...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 04:50:56 PM
Black - vdi
Blue - sap
White - ssv

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 04:51:21 PM
Traced wire colours(https://uploads.tapatalk-cdn.com/20190210/0772ab641786dd7490149f8212b7524e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 04:51:47 PM
Remember now.. the vac black pipe is colour coded...white SSV blue airpump black vdi(https://uploads.tapatalk-cdn.com/20190210/de3581aa2fa6ad651b02ed511fcca7de.jpg)(https://uploads.tapatalk-cdn.com/20190210/0ebcad7926966389150cf0943496a172.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 04:52:50 PM
We concour..!!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 04:56:55 PM
Lol 2nd time in 6 months the dusty bonnet has been taken off...when i take it for a blast gonna scare the life outta me...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 05:00:26 PM
Both vdi and ssv have sensors to check there working and would generate a code if not...unless old pcm like mine was for ssv...but its not a hesitate its a hard cut if not working.  The apv ( motor) cycles on ignition start up check 

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 05:05:04 PM
I've only got a sensor on the ssv. None on the vdi

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 05:08:35 PM
Im sure mine has....know im not so sure...but im not going out to garage again ha ha...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 05:09:26 PM
I've got one in the pic. None on the vdi.

Thanks much appreciated(https://uploads.tapatalk-cdn.com/20190210/9cffe74058ada7e2ba8739c99d3021d2.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 05:12:01 PM
Shows a sensor on ssv can't see one for vdi(https://uploads.tapatalk-cdn.com/20190210/72b93ff6546fc62d83489bcdaef677c1.jpg)(https://uploads.tapatalk-cdn.com/20190210/59de946272a69e8284e0ce1d8b09ccf6.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 05:16:25 PM
I looked at a vdi on ebay...nope no sensor onit to confirm operation...well today a school day for me i thought there was...well there should be 1...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 05:17:49 PM
Which would explain if it doesn't operate properly you don't get any codes

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 05:30:36 PM
Yep, which is what i had when my SSV was not happening due to early pcm not having the fault code....does it Move freely should be able to operate it with a finger and then 12v bridge coil to operate?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 05:34:19 PM
I've charged up the vac tank and put 12v on solenoid and works perfectly. Got to do ssv next

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 05:39:29 PM
Ssv takes a lot more vacuum to move. But it moves

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 05:50:27 PM
I fired mine by bridging and i remember it moved very quickly but that was the vacuum in the cannister so no idea what the value was...the pressures are in the manual...
I bridged so i coukd test whole system..my ssv fault was literally bad connection at soleniod plug..i squeezed the pins together and problem solved...
I just went though the elecy drawings looking for a vdi switch ...nope none there lol...
I had another rx8 engine loom so i just cut plug off and put 12v onit to test...
If your SSV wasnt working youd get a code...


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 06:10:06 PM
Catch can fills up bloody quick. Might of figured the hesitation issue...
I leant me friend the car and don't think he checked the catch can properly.
It was basically full and pulling shit into the inlet (https://uploads.tapatalk-cdn.com/20190210/ff8be9b645dd519aba9b7a595d7b7fcd.jpg)(https://uploads.tapatalk-cdn.com/20190210/246829f7d2a37b6379e3fd930ba4c65d.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 06:20:03 PM
Mmmm. Is it all over maf? How bigs your catch tank? Should NOT really be filling it on the road! Oil level no more than 3/4 any more and the car will burp oil up filler neck..i dont get any now as i have gated sump.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 06:50:24 PM
There was a bit over it. Not a huge amount. I think it's gone into the engine and its had a hard time burning it off. It filled up the same before the engine rebuild.
And I don't think my oil cap is sealing properly

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 06:53:45 PM
Before the gated sump i ran for abit vented to atmosphere so couldnt make a mess in inlet..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 06:59:08 PM
Quote from: boosted on February 10, 2019, 06:53:45 PM
Before the gated sump i ran for abit vented to atmosphere so couldnt make a mess in inlet..

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On the rx8 I broke for the engine the previous owner had vented it down near the subframe and EVERYTHING was rotten.
It put me off hence running it back into the inlet.
I've just read something about over filling out with oil and sucking in through oil filler tower.
I did have it overfilled. (https://uploads.tapatalk-cdn.com/20190210/e8a2d64a807a73d6312f40778e0ce464.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 07:00:43 PM
Yep big no no. 3/4 max. Should stop it filling tank.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 07:01:20 PM
Put my mind at rest

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 07:04:00 PM
Thing is on your fresh engine youll be getting minimal blowby, worn out old engine like my fd i get a fairbit...its actually an oil burp up the  oil filler on right handers caused by surge its a rotary thing..esp. on track...so 3/4  should stop it.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 07:20:51 PM
Quote from: boosted on February 10, 2019, 07:04:00 PM
Thing is on your fresh engine youll be getting minimal blowby, worn out old engine like my fd i get a fairbit...its actually an oil burp up the  oil filler on right handers caused by surge its a rotary thing..esp. on track...so 3/4  should stop it.

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Thanks.

Just thinking about it I filled up in the dark and it was massively overfilled. Would explain it.
Going to take it for a test drive with the vac lines tested. I closed the pins up on the plugs also.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 07:25:57 PM
Cool fingers x.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 07:52:25 PM
Boosted Does yours build up mayo under the oil cap

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 10, 2019, 07:54:05 PM
Yes mate..just moisture n oil mix..nothing to worry about...defo not headgasket failure....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 10:22:42 PM
Not sure what it was exactly but seems to be fixed. No bogging under hard accelation.
Desperately need tyres, I know I keep saying that! Want to get matching alloys first before getting tyres and it's difficult to make my mind up on which ones I want!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 10, 2019, 10:27:28 PM
Quite like the JR3 but also I big fan of deep dish steelies(https://uploads.tapatalk-cdn.com/20190210/59b6f83a44bc837e51a863907a2877d8.jpg)(https://uploads.tapatalk-cdn.com/20190210/f47cfde463efd20288b8e24550d4f236.jpg)(https://uploads.tapatalk-cdn.com/20190210/77c8297c16f0de9ceeaebfc8e9235fbf.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 11, 2019, 10:04:01 AM
I like the Japan Racing 1s...had some on my wifes MR2 a few years agos...seemed very well made and finish was excellent and lasted.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 19, 2019, 04:45:50 PM
Paul, you considered coming to the Castle Combe JDM day? We share the clubstand MRC with RX8club...its usually a big stand and really friendly and lots of the rx8 owners are gonna be well interested in your car...
Its totally informal and all welcome theres no snobbery just a bit of banter here and there.  Chance to meet a few faces on here too. If theres 1 show its JDM combe best of the year.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 19, 2019, 05:09:00 PM
What date is that on?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 19, 2019, 05:13:19 PM
Saturday 1st June...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on February 19, 2019, 07:15:28 PM
I'll be there, probably in my RX-8, but might bring KIMI 2, will decide nearer the date  :)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 23, 2019, 07:32:58 AM
Where do I tickets etc

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 23, 2019, 07:37:33 AM
Theres a thread somewhere ill link later...theres an exclusive track session too...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 23, 2019, 07:47:14 AM
Quote from: boosted on February 23, 2019, 07:37:33 AM
Theres a thread somewhere ill link later...theres an exclusive track session too...

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Ohhh. Need those new tyres I've been having on about but need alloys first lol

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 23, 2019, 06:12:41 PM
It seems to be running a little lean under light acceleration.
Any ideas? Went down to 16 at one point(https://uploads.tapatalk-cdn.com/20190223/8b7a829cb8a2b7aa10894b29198ab8e8.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 23, 2019, 06:14:55 PM
C = commanded
M = measured

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 02, 2019, 08:50:22 PM
Boosted, would you mind just talking me through what I've got to do with this again? (https://uploads.tapatalk-cdn.com/20190302/77272dae2d91055bc1d12f7f60f5ef46.jpg)(https://uploads.tapatalk-cdn.com/20190302/0e653aab33b5825a702e4fe1e17ae862.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 02, 2019, 08:55:23 PM
Thats an mx5 1...deffo different to rx8...ill do some googling.....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 02, 2019, 08:59:16 PM
I'm wondering if the rx8 fuel pressure reg will swap over(https://uploads.tapatalk-cdn.com/20190302/5b752c2231f100ebaa95af14df15565a.jpg)(https://uploads.tapatalk-cdn.com/20190302/0cd3c085fb961d025b69501d39ac2911.jpg)(https://uploads.tapatalk-cdn.com/20190302/5440a377896e556d095601dcff70dda1.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 02, 2019, 09:00:37 PM
Looks like it will(https://uploads.tapatalk-cdn.com/20190302/64e6bff84c5adf2acf2aa6c45a3bd583.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 02, 2019, 09:30:03 PM
Going to source a rx8 fuel pressure reg unless any one has one spare?
I'm going to seal up all the holes on the pop off grille thing. It pops off inside the housing. The cap doesn't rise up like the rx8 one. Reg pressure is a lot less from what I can tell

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 02, 2019, 10:15:21 PM
Pm me your address ive got about 3 in garage...BUT..i really would hook up a pressure gauge if it holds 4 bars all the way to red line then the issue is elsewhere...
Trust me when i say this, ive been there....ive got 3 fuel pots and 2 walbros from testing...
Test not guess i had 2 or 3 issues afteermy install and learnt the hard way lol.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 02, 2019, 10:25:40 PM
Quote from: boosted on March 02, 2019, 10:15:21 PM
Pm me your address ive got about 3 in garage...BUT..i really would hook up a pressure gauge if it holds 4 bars all the way to red line then the issue is elsewhere...
Trust me when i say this, ive been there....ive got 3 fuel pots and 2 walbros from testing...
Test not guess i had 2 or 3 issues afteermy install and learnt the hard way lol.

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I'll PM you.

I'm leaning towards that to be honest.
Might put standard pump back in. Not sure if I trust the one I have

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 03, 2019, 12:07:22 PM
S2 pump is the same as mx5 nc! (https://uploads.tapatalk-cdn.com/20190303/b055f6b364b5af618f1db0b77d262993.jpg)

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(https://uploads.tapatalk-cdn.com/20190303/a82a555a868ac95bc645cf91764805f8.jpg)

https://www.rx8club.com/series-ii-aftermarket-performance-modifications-162/official-s2-fuel-pump-thread-261755/
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 03, 2019, 01:51:46 PM
Got bored(https://uploads.tapatalk-cdn.com/20190303/5d52e3e2b6ed7018c619c662bf7fa3fc.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 03, 2019, 02:19:40 PM
Well after all of that I've had a bit of a brain storm. I've swapped over the rx8 fuel pump loom and the pump switches between high and low load. I have a feeling I've got a sticky relay. Just changing it now to see if it makes a difference

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 03, 2019, 02:40:56 PM
Or loop the resistor....no more low n high power..i did that from beginning saving weight....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 03, 2019, 02:43:57 PM
Looking at the 5 pot...looks like youve blocked the overpressure vent so fuel pressure will skyrocket...
The soldering iron trick is the clip that holds in the metal prv...melt it over so it cant (if it could) lift.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 03, 2019, 02:48:24 PM
I must be misunderstanding something then. The pic of the rx8 setup is to stop the pressure relief valve from opening. I've essentially done the same for the mx5 one. The actuator will still be regulating the pressure (which I haven't touched) I've just stopped the relief valve from opening and blowing out. (https://uploads.tapatalk-cdn.com/20190303/f59772a01888b37f9dcf37448a627e12.jpg)(https://uploads.tapatalk-cdn.com/20190303/2e74e2e324be1035644c686ef74901e0.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 03, 2019, 03:00:07 PM
Ok just checking, have not seen a mx5 1.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on March 03, 2019, 04:23:55 PM


I would be interesting to know what pressure the MX-5 regulates the pressure at.

Reading these posts,  if you stopped the internal pressure regulator from regulating then it may be an idea just to put a regulator in the feed line and do with.

Best not keep running the car with those AFR's until you know whats going on.

 
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 06, 2019, 03:54:22 PM
Grabbed out my boneyard off spares..welcome anything you see...ive not got a complete fuel pot(https://uploads.tapatalk-cdn.com/20190306/d56de417c0fa6810671eac170fd8bc0c.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 06, 2019, 05:59:38 PM
The rx8 fuel pressure regulator looks different to mx5 one :(

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 06, 2019, 06:17:19 PM
Yes totatally different....does 5 tank have a syphon attached? Aa 8 tank is saddle tank...with hump in middle.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 16, 2019, 08:48:57 PM
There is a syphon assembly but its a strange setup. No saddle style tank.
Debating whether to take it for a drive now. Just getting over a cold and I need to get out of the house

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 17, 2019, 08:24:57 PM
Hi mate, pls fit a temp fuel pressure gauge. Youll be able to determine if you have genuine fault or not...
Test not guess, i was in the exact same scenario as you hence a boneyard of fuel pump bits and pieces...
The rx8 pcm would throw a code if lean running im sure. Id be tempted to try a maf sensor too.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 23, 2019, 06:11:53 PM
Quote from: boosted on March 17, 2019, 08:24:57 PM
Hi mate, pls fit a temp fuel pressure gauge. Youll be able to determine if you have genuine fault or not...
Test not guess, i was in the exact same scenario as you hence a boneyard of fuel pump bits and pieces...
The rx8 pcm would throw a code if lean running im sure. Id be tempted to try a maf sensor too.

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Haven't got round to it yet but will do.
I keep getting a misfire at 4.5k annoyingly

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 24, 2019, 04:17:26 PM
Quote from: boosted on March 03, 2019, 02:40:56 PM
Or loop the resistor....no more low n high power..i did that from beginning saving weight....

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How did you "loop" the resistor?


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 24, 2019, 04:21:39 PM
Get the resistor...cut the plug off in the middle of the wires...join the 2 wire ends ..no more resistor dropping voltage. Plug back in.
The fuel pump relays will still swap but there not changing voltage.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 24, 2019, 04:21:59 PM
Get the resistor...cut the plug off in the middle of the wires...join the 2 wire ends ..no more resistor dropping voltage. Plug back in.
The fuel pump relays will still swap but there not changing voltage.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 24, 2019, 04:23:27 PM
Quote from: boosted on March 24, 2019, 04:21:39 PM
Get the resistor...cut the plug off in the middle of the wires...join the 2 wire ends ..no more resistor dropping voltage. Plug back in.
The fuel pump relays will still swap but there not changing voltage.

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Thanks.

Had a weird symptom earlier where it felt sluggish and then felt like a turbo kicked in.
I think the resistor Is pooped and not swapping to high power.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 24, 2019, 04:25:15 PM
Its a quick thing to try, or again youve got port opening issues....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 24, 2019, 04:25:27 PM
Its a quick thing to try, or again youve got port opening issues....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 24, 2019, 04:25:57 PM
Blimin phone..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 24, 2019, 04:27:27 PM
Echo in here today...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 24, 2019, 05:05:51 PM
Might be the problem! (https://uploads.tapatalk-cdn.com/20190324/87f0acb1fc87fd0de7a5fe58690b69dd.jpg)(https://uploads.tapatalk-cdn.com/20190324/06b3a15d3719cc7545b53ac5c037d4bb.jpg)(https://uploads.tapatalk-cdn.com/20190324/2c5d5a749785b2ddc6f4b43e10fea22c.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 24, 2019, 05:15:17 PM
Fuel pump sounds very eager now(https://uploads.tapatalk-cdn.com/20190324/0db0be8d345093286bf020584d2bcbe3.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 24, 2019, 05:56:59 PM
Strangely I'm getting different STFT readings in 2nd gear compared to 3rd.
No STFT in 2nd gear and - 7.81 in 3rd(https://uploads.tapatalk-cdn.com/20190324/1a867e4e3863cb38116016ce7aa86a7d.jpg)(https://uploads.tapatalk-cdn.com/20190324/e2a586615d8bef504ff224d23104c0f5.jpg)

Just to note this is from earlier today before resistor delete
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 24, 2019, 05:57:22 PM
Its outta spec..what was reading 1.0 ohm?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 24, 2019, 05:58:13 PM
Quote from: boosted on March 24, 2019, 05:57:22 PM
Its outta spec..what was reading 1.0 ohm?

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The resistor! It was out of shot of the camera

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 02:04:05 PM
Well done changing the HT leads and deleted the fuel pump resistor the mis fire has got sooo much worse. I'm going to change the plugs as well. But I think there's an issue with the high load electrical circuit

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 25, 2019, 02:08:02 PM
Could this be a earth issue? Ive bulked up the  earths on my car and ring mained them all so not relying on chassis earth connections?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 02:08:59 PM
Possibly. I need to do a bit of write tracing

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 25, 2019, 02:17:16 PM
I feel you frustration....i had a few sim issues with mine, stick with will be worth it.  Earth from battery straight to engine and link all engine sensor earths.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 25, 2019, 02:35:03 PM
If that's the fuel pump resistor that used to sit underneath the air pump, Ive got one if you need it.

Im running an out of tank walboro style pump.

Jon can you confirm I don't need this? If so, its yours Paul if its any use.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 25, 2019, 02:43:12 PM
I think I should all the thread properly, turn out ya don't need one ! lol sorry
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 02:45:52 PM
Thanks for the offer though

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 25, 2019, 02:57:06 PM
The resistor is used to drop voltage supply to pump on low power, its not needed. Not sure of its function other than pump life tbh...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 02:58:58 PM
That's leading plug number 2 (https://uploads.tapatalk-cdn.com/20190325/ed422b3f706824b7b9c14978a6b4dfe3.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 03:04:07 PM
Trailing number 2 (https://uploads.tapatalk-cdn.com/20190325/fc693b365abb9e61b0c8ac977cb1079a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 25, 2019, 03:04:48 PM
Ive seen worse....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 25, 2019, 03:06:13 PM
Far bit of black on them? Oil? Are you premixing?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 03:07:14 PM
Quote from: boosted on March 25, 2019, 03:06:13 PM
Far bit of black on them? Oil? Are you premixing?

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Yes I am now. I didn't to begin with.
It was a fresh engine and I haven't changed plugs since first fire

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 25, 2019, 03:09:24 PM
Cool, look abit black...lol mine have been for 3 engines...ha ha...mazda interval is 30k!!!  I decided on 9k ...so i got awhile togo yet..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 25, 2019, 03:12:49 PM
Tan ideal, they seem to furr up with mileage like barnacles/ scale on ships hull...
Does not look like lean...theyd be white/ cracked from overheating.
Look ok apart from the blackness.
What ration premix...id be thinking no more than 150ml per full tank off super duper...as your still running omp.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 25, 2019, 03:26:04 PM
Is that a riddle?? LOL!

So its not needed?? ? ?



Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 04:03:21 PM
Trailing plug was had a lot closer gap than the first one I pulled out. Might explain things.
Still need to trace wiring but daughter is doing my head in at the moment.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 10:17:53 PM
I can't get my head around this...
Even though the resistor is deleted, its still dropping 1v. How ever if I remove the loop completely it goes back up to 12v.
The below pics are with resistor loop removed(https://uploads.tapatalk-cdn.com/20190325/58a2aedb0675c9a1e7b3faac96199682.jpg)(https://uploads.tapatalk-cdn.com/20190325/7209c9a1337e9d2b522871795509f95f.jpg)(https://uploads.tapatalk-cdn.com/20190325/388a6d86d349573d7c04538740f5ee76.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 10:18:15 PM
And these are with the loop installed and pump running(https://uploads.tapatalk-cdn.com/20190325/596ecd74a987c150b52f9e91fce4340d.jpg)(https://uploads.tapatalk-cdn.com/20190325/7757111784796dc3af638b9de766e563.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 10:25:59 PM
Ignore that. Got it running on the low circuit and measured the voltage and it was the same.

I traced all wires on fuse board ecu and they were fine.
Need to do pump tomorrow.

Also I haven't driven it since changing the plugs which may of sorted things

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 10:41:52 PM
When I drive out earlier there was a miss fire at 4.5k nearly every time. Then if I held it at 6k on light throttle it was misfiring like a machine gun.
Going to take it for another spin and see if plugs have made a difference and go from there

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2019, 10:57:31 PM
I think the fuel pump is shot. Never heard of quantum before

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on March 26, 2019, 07:22:39 AM
Can I ask if you have code read the car and if so  what codes did you get ?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 07:27:38 AM
Quote from: clive on March 26, 2019, 07:22:39 AM
Can I ask if you have code read the car and if so  what codes did you get ?
No codes... I scanned it with ids

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on March 26, 2019, 08:13:25 AM
OK,
Here's one that wont show up as a code.

Check the wiring colours on the fuel injectors to see if the plugs are on the right way around as this will give the symptom you describe.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 09:15:30 AM
Quote from: clive on March 26, 2019, 08:13:25 AM
OK,
Here's one that wont show up as a code.

Check the wiring colours on the fuel injectors to see if the plugs are on the right way around as this will give the symptom you describe.
Spot on thanks

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 09:19:42 AM
I'll leave this here for later (https://uploads.tapatalk-cdn.com/20190326/1db3514e0c9c32214e36e2e7d44fdf0e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 26, 2019, 10:54:30 AM
Ive got a couple of piccys on my westy thread, making identifying the injectors and loom so much easier....bewarned they are a sod to get off...10 exhales try again....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 11:00:54 AM
If you have then handy that would be great

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 26, 2019, 11:03:31 AM
Where are you mate? If you came to mine we can go right through it ? Ill find the piccys i done. Makes it so much easier to identify them and where they go...i went to that rx8 mx5 conversion and they were on wrong....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 11:05:49 AM
I'm in Basingstoke, going to struggle for time this weekend but thanks for the offer I'll bear it in mind. Thanks(https://uploads.tapatalk-cdn.com/20190326/cfe58139ad888429ca586c0df5dccfd6.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 26, 2019, 11:16:06 AM
http://mazdarotaryclub.com/forum/index.php?topic=82345.0

piccys here at bottom of thread.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 26, 2019, 11:19:38 AM
so the bottom piccy i done shows the cable orientation...3 branches of the injector loom 1 with 1 inj plug 1 with 2 injector plugs and final 1 with 3 injector plugs...makes it soooo much easier to identify and get right...as couple of the inj have same wire colours...
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 12:22:10 PM
What's the purpose of the condenser? (https://uploads.tapatalk-cdn.com/20190326/27e98611747f52dab488be253444401b.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 26, 2019, 12:27:26 PM
Interference suppressor...no whizzy noise on stereo.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 12:35:29 PM
Everything on fuel pump plug checked out OK....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 12:56:04 PM
Is this pipe suppose to have a check valve in or anything like that?
Is the one that goes from the inlet boot to the solid pipe at the bottom of inlet(https://uploads.tapatalk-cdn.com/20190326/422ecb54a0c20ab6001f6e8f3e4519ae.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 26, 2019, 12:59:34 PM
No checkvalve i believe thats the vent/ vacuumline  for the omp lines to inlet accordion tube...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 01:01:26 PM
Quote from: boosted on March 26, 2019, 12:59:34 PM
No checkvalve i believe thats the vent/ vacuumline  for the omp lines to inlet accordion tube...

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Cool cheers

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 01:02:02 PM
Will I'm glad I pulled this all off. Fuel line is perished despite being brand new not so long ago!
I'll be changing that now! (https://uploads.tapatalk-cdn.com/20190326/5930b0141199fd72df5e93528291b16d.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 01:11:06 PM
This normal? (https://uploads.tapatalk-cdn.com/20190326/fa7871da45734e0b0886e4501902c5ba.jpg)(https://uploads.tapatalk-cdn.com/20190326/5848f95a555cb747bc06e6991d73a001.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 26, 2019, 01:12:04 PM
Yep just abit of oil mayo...oil and condensation.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 01:12:47 PM
Bloody every where(https://uploads.tapatalk-cdn.com/20190326/d371e82e67ea2f5f06272872715198a7.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 26, 2019, 01:14:25 PM
Dont worry not headgasket lol..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 26, 2019, 01:31:24 PM
All injectors plugged in correctly...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 27, 2019, 07:28:44 PM
2011 might explain it! (https://uploads.tapatalk-cdn.com/20190327/6c6b76b010e65ef87b7d9fa1f51f498a.jpg)(https://uploads.tapatalk-cdn.com/20190327/32da1a3b1409a5b2d535efe3e503e971.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 27, 2019, 07:51:21 PM
Fuel pipe like that cant be submerged in fuel...it will go hard and brittle and probably delaminate inside but outside will be fine for years..
In the fuel pump upgrade kits you get a white convuluted hose that is sutable for submersion in fuel. Fuel hose will have fuel printed on outside....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 27, 2019, 07:53:10 PM
That's just in the engine bay mate

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 27, 2019, 07:54:48 PM
Mmmm, was it made in 2011? Dont look good.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 27, 2019, 08:13:39 PM
Quote from: boosted on March 27, 2019, 07:54:48 PM
Mmmm, was it made in 2011? Dont look good.

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Yep. Not good at all. Was sat in packaging for a couple of years not used. Was brand new when I put it on!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 27, 2019, 08:19:04 PM
Brand new maf(https://uploads.tapatalk-cdn.com/20190327/a4cb2b576c29099014887d0bc8ebb48a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 27, 2019, 08:19:27 PM
All back together(https://uploads.tapatalk-cdn.com/20190327/9582d6288feed25752612f15b3359e83.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 27, 2019, 08:27:34 PM
So if all of this doesn't work I'll be taking a match and a can fuel to the thing.

Failing that my next guess is the fuel pump. Stock the oe one back in which had 33k on it. But I faintly remember buggering the filter sock taking it off.

What did you do for the fuel pump in the mx5 you did boosted?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 29, 2019, 09:45:06 PM
Argh bloody thing. Still misfiring at 4k
What happens on the engine around that rpm? Do any actuators work around that range?
Might swap the fuel pump tomorrow just incase.
Yes I know I need to get a fuel pressure gauge!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 29, 2019, 10:20:28 PM
Just for reference I've changed the following for new components
MAF
Ht leads
Spark plugs
Coils were brand new only covered 5k

I've checked alternator is putting out 14 4v
Ssv and vdi actuators move freely when activated under normal conditions.
I've cleaned air filter recently

The only thing I can think of that's fuel pump is falling?

I rev the engine without load and there's no mis fire. Drive under load and it misfires

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 29, 2019, 10:24:06 PM
Still lights the wheels up though(https://uploads.tapatalk-cdn.com/20190329/4d0c5c6457d0ddd94329f7cb305c6d8a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 30, 2019, 09:26:29 AM
What happens when :
RPM___SYSTEM_______WHAT
3750__Fuel Injectors__#2 primary and secondary injector start
___________________controlled by ECU fuel maps
___________________(All in use during WOT!?!)
3750__SDAIS________#2 primary intake ports open
5500__SDAIS________VFAD may open (Yamaguchi p 115)
6250__SDAIS________Tertiary intake ports open
7250__SDAIS________Primary intake ports interconnnect
___________________adds a second shorter path
7250__SDAIS________VFAD opens on WOT

S dias..is the rx8 port opening sequence its explained in the factory manual on here.

does look like an SSV problem...with the car off put 12v on the ssv coil..it should click an open instantly...that way your testing coil vac chamber and line and ccv actuator.
pinched this from  rx8club.
Here's all you ever wanted to know about the RX-8 intake.

Aftermarket intakes only do away with VFAD. No there is no ecu retuning to account for this. There are gains (very small) though but they are based on total airflow vs resonant tuning. Somone needs to make a resonant tuned intake that flows good too. This would yield bigger gains that ANYONE else's intake system out there. I've said it here for almost a year now and still no one has done it.

I am not sure but I should at least hope that each valve and VFAD open at a set rpm regardless of load. Tuning is rpm based not load based. This would make the most sense.

If you look at the diagram very carefully you can see how everything works. The wavy lines are the air filter in the airbox. This set of diagrams is the 6 port engine. There is also one of the 4 port engine but not pictured here. It is very similar but lacks 2 intake ports and the VFAD duct on the intake.

Below 3750 rpm, only the primary (2 center ports) are receiving air. This insures that all of the airflow going into the engine is at a high velocity unlike the older rotaries where all of the ports were open at the same time. Mazda tried to overcome this problem with a 3 plate throttlebody and only opening the primary plate alone unit 20% throttle. It is a little complicated and I don't want to explain it all here. Let's just say this (Renesis) is superior.

At 3750 rpm when airflow is at its greatest and is starting to hurt power (intake airspeed around .6 mach), the secondary ports open up. Obviously this is why the fuel injectors are fired sequentially so there is no fuel in a nonmoving runner. Now we have a total of 4 ports being used until 6250 rpm. This again becomes a flow restriction and the tertiary ports open up.

At 7250 rpm the VDI (Variable Dynamic Intake as known on the 2nd gen RX-7) valve opens up which retunes the intake for higher rpm use. I'll explain it in a minute. Also at 7250 rpm the VFAD duct on the intake box opens up. This does a couple of things. It does allow a shorter more direct route for air to enter but that is really a moot point. More importantly it retunes the intake box. The stock airbox size along with the intake duct's length and width combine to acoustically tune the airbox to resonate at a certain frequency. This frequency is set to help the engine gain power at lower rpms. When the VFAD duct opens, it is retuning the intake box and adding its own area to the available area for air to flow through. It does a pretty good job considering that it is only a few horsepower less than the aftermarket cone filter systems but has the capability for way less ariflow. The total area for air to enter the stock box is less than the area of either the throttlebody or the MAF sensor. If Mazda would have given it a little more intake area with the same tuning, the aftermarket probably would have never outdone it. If you want to figure out the perfect size for the intake tube, figure out the diameter necessary for air entering the box at 8500 rpms to not exceed 122.74 mph. That will be the optimum size. Length will be determined based on tuning rpm and intake box size. There is a fun exercise for someone.

Back to the subject of VDI. The reason this valve opens is to retune the intake manifold so the engine thinks the runners are shorter. I've posted this before but here it is again. The intake runner lengths are determined by what rpm the designers want a gain to be at. The continuously variable intake runner length as on the LeMans 787B car is not feasible in a streetcar but we can partially simulate the effects. When VDI opens, the pulses from one rotor do not have to go back to a central point before heading back down the opposite runner to either help or hurt it. In essence when the VDI valve is open, the engine only "sees" the runner up to the valve and not after (before depending on your frame of reference) it. Here's the effective lengths.

6 port "effective" intake runner lengths.

Primary VDI closed 19.8"
Secondary VDI closed 20.4"

Primary VDI open 13.5"
Secondary VDI open 14.2"

Tertiary always 17.3" VDI does not effect these runners.

4 port "effective" intake runner lengths.

Primary VDI closed 27.1"
Secondary VDI closed 29.1"

Primary VDI open 14.8"
Secondary VDI open 16.5"

As you can see when the valve opens it is like installing a shorter intake manifold which retunes for better high end power. The real black art is designing an entire system that works together almost seemlessly. Mazda did a very good job on this intake manifold. It is much better than anything they have ever done and most likely will be very tough to improve upon without some big sacrifices elsewhere in the powerband.


The dips in power as seen on the dyno are the valves opening. The problem isn't so much that there is a pressure drop causing the dips but rather than the valves don't open quick enough. They are not electrically opened as other here have stated. They are opened pneumatically. The electric confusion comes from the fact that there is a solenoid that electrically opens at a set rpm that allows air to flow to the actuators which causes them to open. If a reliable servo could be found, it would be a better system. The faster the better.

I forgot to mention another length difference between the 4 and 6 port engines. The intake duct going into the airbox is not the same between both engines. The 4 port engine does not just use the long pipe from the 6 port engine. It uses a longer pipe. Obviously it does not have the VFAD duct either. Different engine require different tunings.

I wonder if I forgot anything else?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 30, 2019, 09:27:19 AM
https://www.google.com/imgres?imgurl=https%3A%2F%2Fwww.rx8club.com%2Fattachments%2Frx-8-discussion-3%2F115464d1203389459-does-mazda-say-periodic-high-rpm-good-untitled.jpg&imgrefurl=https%3A%2F%2Fwww.rx8club.com%2Frx-8-discussion-3%2Fdoes-mazda-say-periodic-high-rpm-good-138317%2F&docid=MMBwGrY319YgOM&tbnid=76KMQ8-CegHXYM%3A&vet=10ahUKEwiJyufcwqnhAhXS1uAKHesxDnoQMwhEKAQwBA..i&w=640&h=402&hl=en-GB&authuser=0&bih=625&biw=1366&q=rx8%20ssv%20valve%20opening%20rpm&ved=0ahUKEwiJyufcwqnhAhXS1uAKHesxDnoQMwhEKAQwBA&iact=mrc&uact=8
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2019, 09:42:47 AM
Quote from: boosted on March 30, 2019, 09:26:29 AM
What happens when :
RPM___SYSTEM_______WHAT
3750__Fuel Injectors__#2 primary and secondary injector start
___________________controlled by ECU fuel maps
___________________(All in use during WOT!?!)
3750__SDAIS________#2 primary intake ports open
5500__SDAIS________VFAD may open (Yamaguchi p 115)
6250__SDAIS________Tertiary intake ports open
7250__SDAIS________Primary intake ports interconnnect
___________________adds a second shorter path
7250__SDAIS________VFAD opens on WOT

S dias..is the rx8 port opening sequence its explained in the factory manual on here.

does look like an SSV problem...with the car off put 12v on the ssv coil..it should click an open instantly...that way your testing coil vac chamber and line and ccv actuator.
pinched this from  rx8club.
Here's all you ever wanted to know about the RX-8 intake.

Aftermarket intakes only do away with VFAD. No there is no ecu retuning to account for this. There are gains (very small) though but they are based on total airflow vs resonant tuning. Somone needs to make a resonant tuned intake that flows good too. This would yield bigger gains that ANYONE else's intake system out there. I've said it here for almost a year now and still no one has done it.

I am not sure but I should at least hope that each valve and VFAD open at a set rpm regardless of load. Tuning is rpm based not load based. This would make the most sense.

If you look at the diagram very carefully you can see how everything works. The wavy lines are the air filter in the airbox. This set of diagrams is the 6 port engine. There is also one of the 4 port engine but not pictured here. It is very similar but lacks 2 intake ports and the VFAD duct on the intake.

Below 3750 rpm, only the primary (2 center ports) are receiving air. This insures that all of the airflow going into the engine is at a high velocity unlike the older rotaries where all of the ports were open at the same time. Mazda tried to overcome this problem with a 3 plate throttlebody and only opening the primary plate alone unit 20% throttle. It is a little complicated and I don't want to explain it all here. Let's just say this (Renesis) is superior.

At 3750 rpm when airflow is at its greatest and is starting to hurt power (intake airspeed around .6 mach), the secondary ports open up. Obviously this is why the fuel injectors are fired sequentially so there is no fuel in a nonmoving runner. Now we have a total of 4 ports being used until 6250 rpm. This again becomes a flow restriction and the tertiary ports open up.

At 7250 rpm the VDI (Variable Dynamic Intake as known on the 2nd gen RX-7) valve opens up which retunes the intake for higher rpm use. I'll explain it in a minute. Also at 7250 rpm the VFAD duct on the intake box opens up. This does a couple of things. It does allow a shorter more direct route for air to enter but that is really a moot point. More importantly it retunes the intake box. The stock airbox size along with the intake duct's length and width combine to acoustically tune the airbox to resonate at a certain frequency. This frequency is set to help the engine gain power at lower rpms. When the VFAD duct opens, it is retuning the intake box and adding its own area to the available area for air to flow through. It does a pretty good job considering that it is only a few horsepower less than the aftermarket cone filter systems but has the capability for way less ariflow. The total area for air to enter the stock box is less than the area of either the throttlebody or the MAF sensor. If Mazda would have given it a little more intake area with the same tuning, the aftermarket probably would have never outdone it. If you want to figure out the perfect size for the intake tube, figure out the diameter necessary for air entering the box at 8500 rpms to not exceed 122.74 mph. That will be the optimum size. Length will be determined based on tuning rpm and intake box size. There is a fun exercise for someone.

Back to the subject of VDI. The reason this valve opens is to retune the intake manifold so the engine thinks the runners are shorter. I've posted this before but here it is again. The intake runner lengths are determined by what rpm the designers want a gain to be at. The continuously variable intake runner length as on the LeMans 787B car is not feasible in a streetcar but we can partially simulate the effects. When VDI opens, the pulses from one rotor do not have to go back to a central point before heading back down the opposite runner to either help or hurt it. In essence when the VDI valve is open, the engine only "sees" the runner up to the valve and not after (before depending on your frame of reference) it. Here's the effective lengths.

6 port "effective" intake runner lengths.

Primary VDI closed 19.8"
Secondary VDI closed 20.4"

Primary VDI open 13.5"
Secondary VDI open 14.2"

Tertiary always 17.3" VDI does not effect these runners.

4 port "effective" intake runner lengths.

Primary VDI closed 27.1"
Secondary VDI closed 29.1"

Primary VDI open 14.8"
Secondary VDI open 16.5"

As you can see when the valve opens it is like installing a shorter intake manifold which retunes for better high end power. The real black art is designing an entire system that works together almost seemlessly. Mazda did a very good job on this intake manifold. It is much better than anything they have ever done and most likely will be very tough to improve upon without some big sacrifices elsewhere in the powerband.


The dips in power as seen on the dyno are the valves opening. The problem isn't so much that there is a pressure drop causing the dips but rather than the valves don't open quick enough. They are not electrically opened as other here have stated. They are opened pneumatically. The electric confusion comes from the fact that there is a solenoid that electrically opens at a set rpm that allows air to flow to the actuators which causes them to open. If a reliable servo could be found, it would be a better system. The faster the better.

I forgot to mention another length difference between the 4 and 6 port engines. The intake duct going into the airbox is not the same between both engines. The 4 port engine does not just use the long pipe from the 6 port engine. It uses a longer pipe. Obviously it does not have the VFAD duct either. Different engine require different tunings.

I wonder if I forgot anything else?
SSV seems suspect then.
Thanks for that.
I might change the ssv solenoid.
I tested all the vac chamber and solenoids and they were fine.
Ssv operates as it should, doesn't get stuck.
Honestly at a loss.
Might change the whole ssv setup and sensor

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 30, 2019, 10:01:50 AM
Worth checking ssv eleccy plug and continuity back to ecu? Mine was a bad contact..squeezing pins solved it. But as everything test ok..could be not switching as not getting signal too? Resistance test at pcm to see coil resistance would show this.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 30, 2019, 01:35:27 PM
Oh my giddy aunt !!!

Jon, can tell your a maintenance engineer!  :13:

I looked at all that and thought i was in a scene from The Matrix...

Please dont start talking about Laplace Transforms, I hated them at Uni
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 30, 2019, 03:21:15 PM
It will be summit simple just working it out is the hard part...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2019, 05:46:17 PM
I've manually activating the ssv actuator and the switch isn't registering on odb scanner(https://uploads.tapatalk-cdn.com/20190330/8304ff8211e82eb9079b8f5b78065a9c.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2019, 06:32:38 PM
I think because the ecu isn't activating it, it wasn't showing.
I've traced all wires and done continuity etc all fine.
Manually activated ssv solenoid, works fine.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 30, 2019, 06:33:05 PM
Prior point i raised early cars didnt have the code for ssv failure to operate which was why i took an age to find my issue...i swapped ecu popped a code a fix in 20 mins.I run this early ecu as its been mapped for 1100rpm.
I have a spare ecu set with immobilser and key that defo has the ssv software onit ...happy to send to you to try?
Looks like you have the switch but not the software for it in the ecu...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 30, 2019, 06:35:37 PM
All you do is cable tie key in coil and hang down..use your key in barrel..just unplug coil reciever and plug in to mine.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2019, 06:40:37 PM
That would be much appreciated if you don't mind.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 30, 2019, 06:41:53 PM
Pm address ill send it out monday.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2019, 06:50:27 PM
Just thinking out loud. At 3750 rpm the primary and secondary injectors open, which is when my misfire happens.
Demand for fuel increases and if the pump isn't performing it will dip momentarily?
Also up the rev range it seems hit and miss some times.
I'm going to swap the pump out just in case

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 30, 2019, 06:57:29 PM
Ok mate worth a try plenty of dodgy fake pumps out there.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2019, 07:00:36 PM
I still want to try your ecu as well please

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 30, 2019, 07:10:42 PM
Will send monday...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2019, 09:52:00 PM
New pump out. Old pump in(https://uploads.tapatalk-cdn.com/20190330/3ea6c85b8e44e9dbb967685b0a1cef1f.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 31, 2019, 08:20:34 PM
Boosted, I'd hold fire on sending me the ecu.

I've come to the conclusion that Quantum fuel pumps are sh!t. Please, any one reading this, do not buy this rubbish.

Old denso pump is in and no misfires or hesistation.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 31, 2019, 08:25:56 PM
 :13: :13: :sign0098: :sign0098:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 31, 2019, 10:50:50 PM
Sweet. Time to enjoy.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 19, 2019, 06:27:08 PM
Hello Paul...hows it going? 

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 19, 2019, 06:28:10 PM
Still going alright, not driven it too much recently. Tyres are a bit low on the back.
Yourself?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 19, 2019, 06:34:58 PM
Good mate...im currently waiting for the old bill to knock on my door are some hoonage down the Trading est ha ha..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 19, 2019, 06:37:46 PM
Ha nice.
Do you know if we get sent information regarding the car show at castle Coombe? I'm a bit in the dark at the moment(https://uploads.tapatalk-cdn.com/20190419/6cbf50ff74ac131c102dac30fb9997aa.jpg)(https://uploads.tapatalk-cdn.com/20190419/58fd322591f73b79cb7b2a3a5fbad502.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 19, 2019, 06:45:24 PM
Yep nearer the time mate, all will be fine super slick organising on RX8OC.
Tempted by the rx8 exclusive session on track????... 15 mins... really good guys real good ettiquette on track. Drive to your limits no pressure...if you just wanna squirt it down the straights and take it steady all fine and no hassling from any mega turbo cars...
Me n Clive usually have a play but were really respectful to other track users...its basically loads of rotarys on track having a hoon.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 19, 2019, 06:51:47 PM
Tempted. Do you have to have a helmet on track?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 19, 2019, 06:58:54 PM
Yes mate. Legs n arms covered. Ive got 1 you can borrow.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 19, 2019, 06:59:50 PM
I've got a big(long) head. Finding a helmet is tricky. I only just found a bike helmet that fits. Better start looking

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 19, 2019, 07:02:26 PM
Lol..ive got a selection of helmets most medium...got an open face 1..that pretty much fits any head..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 20, 2019, 11:48:04 AM
Quote from: Paul_13 on April 19, 2019, 06:59:50 PM
I've got a big(long) head. Finding a helmet is tricky. I only just found a bike helmet that fits. Better start looking

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Paul, that description is bizarre. Im thinking all sorts now lol. People come in all shapes n sizes, plonk Jon’s open face on.... it’s all good
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 20, 2019, 11:50:33 AM
Lol. Head circumference of 64cm

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 20, 2019, 01:06:04 PM
I think there about 8 places left on exclusive trackday and wouldnt worry about helmet..most of the rx8 guys brings spares...
Wayne you got a spare...youve got a big head lol...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 20, 2019, 01:27:43 PM
Paul, are you a mystical creature from a whole new world?

64cm dun sounds that bad?!?!?!

Now if you said inches...........well.......
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 20, 2019, 01:29:06 PM
Big head big brain.......... just roll with it  :icon_thumleft:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 20, 2019, 01:30:55 PM
Do0d,

Im at 60cm and I have no hair to bulk it out?

whats 1.5 inches between friends? cough !
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 20, 2019, 01:35:48 PM
Worst case scenario..we could scoop out a melon...?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 20, 2019, 02:07:23 PM
hahahaha

I was trying to diplomatic !!!

But i dont know Paul as well as you.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 20, 2019, 02:09:01 PM
Ive never met Paul lol...he drives a rotary so hes bound to be cool.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 20, 2019, 02:31:47 PM
Ha I get abuse all the time because of it

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 22, 2019, 12:19:27 PM
Not the end of the fuel pump issue me thinks.
Massive dip in power holding it at 5k going up a slip road

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 22, 2019, 12:36:02 PM
Nothing simple eh.......

I have no clue, wouldnt know where to start...

I just hit things with hammers
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 22, 2019, 02:18:31 PM
Quote from: Paul_13 on April 22, 2019, 12:19:27 PM
Not the end of the fuel pump issue me thinks.
Massive dip in power holding it at 5k going up a slip road

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Bring it to me..we can spend a day onit sorting..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on April 22, 2019, 05:29:34 PM
Random thought,
Has the car got a cat fitted as collapsed cats normally cause issues at around 5K on RX-8's
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 22, 2019, 05:35:51 PM
No, not a problem on my setup

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 26, 2019, 05:10:39 PM
Why can I not find a 6 speed lightened flywheel?!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 26, 2019, 05:32:14 PM
Racing Beat Lightweight flywheel...Mazda Rotary Parts...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 30, 2019, 06:31:50 AM
I think I've fogies what the hesistation under full load accelation is....

Flat foot shift mode.

Restricts the revs back to 6k hence the massive feeling of hesistation.

Wish I realised this sooner!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 02, 2019, 11:52:05 AM
Last time i shifted like that was in my xr2 when i was 19...
Being carbed not FI like my previous xr3i...it revved out and went bang. The conrod came out the side of the block...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 11, 2019, 10:40:00 AM
Really stuck on what wheels to get.
Any favourites? (https://uploads.tapatalk-cdn.com/20190511/8ee7d21df3f5b3eefb918c4e43d6ea21.jpg)(https://uploads.tapatalk-cdn.com/20190511/97c6fb1d462b8bf74b691332f1a9593d.jpg)(https://uploads.tapatalk-cdn.com/20190511/a9e8ec5d2f1c549073ce0bb9d06b0a51.jpg)(https://uploads.tapatalk-cdn.com/20190511/5bb1433173891d585fa57f0cc8fb2c82.jpg)(https://uploads.tapatalk-cdn.com/20190511/30e0142ae9891fb8ae80569276636f2f.jpg)(https://uploads.tapatalk-cdn.com/20190511/dacd2a4249e6d6d6b1510445eb39e9a8.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 11, 2019, 11:19:36 AM
I like the last 1s.
Polished lip will be the first to go corroded...regular wheel maintenance reqd.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: therealbrad_wil on May 11, 2019, 11:21:20 AM
Quote from: Paul_13 on May 11, 2019, 10:40:00 AM
Really stuck on what wheels to get.
Any favourites? (https://uploads.tapatalk-cdn.com/20190511/8ee7d21df3f5b3eefb918c4e43d6ea21.jpg)(https://uploads.tapatalk-cdn.com/20190511/97c6fb1d462b8bf74b691332f1a9593d.jpg)(https://uploads.tapatalk-cdn.com/20190511/a9e8ec5d2f1c549073ce0bb9d06b0a51.jpg)(https://uploads.tapatalk-cdn.com/20190511/5bb1433173891d585fa57f0cc8fb2c82.jpg)(https://uploads.tapatalk-cdn.com/20190511/30e0142ae9891fb8ae80569276636f2f.jpg)(https://uploads.tapatalk-cdn.com/20190511/dacd2a4249e6d6d6b1510445eb39e9a8.jpg)

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Number 2 if it was my choice...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 11, 2019, 11:24:34 AM
Quote from: boosted on May 11, 2019, 11:19:36 AM
I like the last 1s.
Polished lip will be the first to go corroded...regular wheel maintenance reqd.

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I don't clean cars. So I'm of the same opinion!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 11, 2019, 11:25:03 AM
Quote from: therealbrad_wil on May 11, 2019, 11:21:20 AM
Quote from: Paul_13 on May 11, 2019, 10:40:00 AM
Really stuck on what wheels to get.
Any favourites? (https://uploads.tapatalk-cdn.com/20190511/8ee7d21df3f5b3eefb918c4e43d6ea21.jpg)(https://uploads.tapatalk-cdn.com/20190511/97c6fb1d462b8bf74b691332f1a9593d.jpg)(https://uploads.tapatalk-cdn.com/20190511/a9e8ec5d2f1c549073ce0bb9d06b0a51.jpg)(https://uploads.tapatalk-cdn.com/20190511/5bb1433173891d585fa57f0cc8fb2c82.jpg)(https://uploads.tapatalk-cdn.com/20190511/30e0142ae9891fb8ae80569276636f2f.jpg)(https://uploads.tapatalk-cdn.com/20190511/dacd2a4249e6d6d6b1510445eb39e9a8.jpg)

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Number 2 if it was my choice...

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That's one of my favourites! But loads of maintenence

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: therealbrad_wil on May 11, 2019, 11:28:37 AM
Quote from: Paul_13 on May 11, 2019, 11:25:03 AM
Quote from: therealbrad_wil on May 11, 2019, 11:21:20 AM
Quote from: Paul_13 on May 11, 2019, 10:40:00 AM
Really stuck on what wheels to get.
Any favourites? (https://uploads.tapatalk-cdn.com/20190511/8ee7d21df3f5b3eefb918c4e43d6ea21.jpg)(https://uploads.tapatalk-cdn.com/20190511/97c6fb1d462b8bf74b691332f1a9593d.jpg)(https://uploads.tapatalk-cdn.com/20190511/a9e8ec5d2f1c549073ce0bb9d06b0a51.jpg)(https://uploads.tapatalk-cdn.com/20190511/5bb1433173891d585fa57f0cc8fb2c82.jpg)(https://uploads.tapatalk-cdn.com/20190511/30e0142ae9891fb8ae80569276636f2f.jpg)(https://uploads.tapatalk-cdn.com/20190511/dacd2a4249e6d6d6b1510445eb39e9a8.jpg)

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Number 2 if it was my choice...

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That's one of my favourites! But loads of maintenence

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Didn't have to be... So many wheel products... spray on jetwash off... Unless you're doing show and shine

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 11, 2019, 11:34:37 AM
Wheel choice is immense lol...
My fave is Team Dynamics pro race 1.2...
Fantastic well priced wheel. 2 many spokes for cleaning though.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 14, 2019, 06:39:39 PM
Wheels ordered. They didn't have gun metal annoyingly but oh well. Black will do. Less cleaning!
Any one got a spare gearbox? I think the thrust bearing has gone on input shaft.
Extremely noisy with clutch out, makes a clunking  noise when engaging the clutch. With the clutch depressed it's nice and quiet.
The output shaft has a bit of play when I grab it from underneath. (https://uploads.tapatalk-cdn.com/20190514/cab708a9c5e82697bddb21aa5e367c14.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 14, 2019, 06:42:40 PM
Bigpete over on rx8oc prob most trusted source or 1 of the  nearest rx8 specialist prob have a few ...so dont get stung with postage...loads about...and ebay...£60 upwards.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on May 14, 2019, 06:43:10 PM
I’m late to the party...... what about steels with chrome centre caps and wide whitewalls ???
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 14, 2019, 06:44:06 PM
I like them wheels.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on May 14, 2019, 06:45:28 PM
Quote from: boosted on May 14, 2019, 06:42:40 PM
Bigpete over on rx8oc prob most trusted source or 1 of the  nearest rx8 specialist prob have a few ...so dont get stung with postage...loads about...and ebay...£60 upwards.

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Yup I got a 5 speeder recently from eBay for 70 notes, plenty out there !
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 14, 2019, 07:01:23 PM
Needs to be 6 speed.
Ebay prices seem extortionate

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 14, 2019, 07:02:50 PM
Whos your specialist?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 14, 2019, 07:04:29 PM
It was hayward rotary but I don't think he's trading any more?! Website is down and I've been waiting for a text back about warranty on my engine which hasn't happened.
He did text saying he wasn't well and didn't go into any more detail, hopefully just a cold and nothing more serious

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 14, 2019, 07:07:00 PM
Quote from: Jamie R on May 14, 2019, 06:43:10 PM
I’m late to the party...... what about steels with chrome centre caps and wide whitewalls ???
I spent many hours taking through 4x4 websites to right the right steel wheel... Still didn't make my mind up

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 14, 2019, 07:07:10 PM
Quote from: boosted on May 14, 2019, 06:44:06 PM
I like them wheels.

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Thanks

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 14, 2019, 07:07:25 PM
Carl was at Combe for Clives race. Keep trying he will still be trading.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 14, 2019, 07:10:10 PM
Quote from: boosted on May 14, 2019, 07:07:25 PM
Carl was at Combe for Clives race. Keep trying he will still be trading.

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I'll drop him another message.
He did say he had to vacate his workshop and he didn't have any where lined up

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 14, 2019, 07:18:28 PM
Ohh i didnt know that..fingers x he finds something. I know he said it was really expensive and hard to find a decent unit at a sensible price.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 14, 2019, 07:50:02 PM
I've managed to track down an updated denso fuel pump from a Nissan gtr. Cheap.
(https://uploads.tapatalk-cdn.com/20190514/aecd506b243f26f1f1969fcedcc5a017.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Essex2Visuvesi on May 14, 2019, 10:48:30 PM
If you've not pulled the trigger on the fuel pump, give me a shout.
Got something that may be suitable in the shed.  Bought it for my turbo'd MR-S but never fitted it before I sold it
It's unused and looks the same as what you're shopping for
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 14, 2019, 10:49:36 PM
Quote from: Essex2Visuvesi on May 14, 2019, 10:48:30 PM
If you've not pulled the trigger on the fuel pump, give me a shout.
Got something that may be suitable in the shed.  Bought it for my turbo'd MR-S but never fitted it before I sold it
It's unused and looks the same as what you're shopping for
What brand /make is it? What specs?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Essex2Visuvesi on May 15, 2019, 01:26:12 PM
Sorry it's only a Walbro 255PLH
I'll post up some pics when I get home tonight
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 15, 2019, 01:39:34 PM
Ok cheers

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 18, 2019, 10:51:33 AM
I'll get some better pics :)
Went for pilot sport 4 (https://uploads.tapatalk-cdn.com/20190518/065954da932a9b4851fd013b61d70883.jpg)(https://uploads.tapatalk-cdn.com/20190518/0d403bb91e1485f4d5a5eee570486865.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 18, 2019, 11:01:21 AM
Oh and I got the coombe tickets through

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 18, 2019, 06:41:05 PM
Still not a great photo. Look loads better in the flesh.
Performance has improved drastically with the pilot sport 4's :D
The 10 year old tyres were starting to show their age! (https://uploads.tapatalk-cdn.com/20190518/58eaefca4128f6c88a3171e819dfc2c3.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on May 18, 2019, 10:01:52 PM
Wow that sits real nice  :icon_thumleft:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: re japi on May 19, 2019, 06:35:06 AM
Nice, me likes!

Lähetetty minun G8141 laitteesta Tapatalkilla

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on May 19, 2019, 02:03:05 PM
White on black, super combo

Looks good  :icon_thumleft:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 19, 2019, 03:34:41 PM
Yep me like too...ill take a px on the Westory...?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on May 19, 2019, 03:35:09 PM
I agree, I think those wheels look great  :sign0098:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 25, 2019, 08:31:30 AM
Quote from: boosted on May 19, 2019, 03:34:41 PM
Yep me like too...ill take a px on the Westory...?

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Only just seen this lol
My arse is probably too big to fit in the seats.
Thanks every one for the kind words.
Think I'm going to wash it today and take the front plate off. Got one of the static plates

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 25, 2019, 09:03:09 AM
Only 1 seat...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 01, 2019, 07:14:44 PM
P0661 code.

Ssv solenoid circuit...

I'm wondering if the main egi relay is faulty and dropping voltage. Its what supplies the solenoid with power (https://uploads.tapatalk-cdn.com/20190601/dacc365c7e18600a80dfc1ca5504ce01.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 01, 2019, 07:29:48 PM
I’m afraid I’m no use to you, wiring n stuff is like witch craft
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 01, 2019, 07:37:45 PM
The pcm is not seeing the coil open circuit. Youve tested from the pcm pins resistance...i wondering if coil for soleniod breaking down.
Swa with redundant air pump...move plug and vac line onto air pump 1. That will eliminate coil.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 01, 2019, 07:55:09 PM
Quote from: boosted on June 01, 2019, 07:37:45 PM
The pcm is not seeing the coil open circuit. Youve tested from the pcm pins resistance...i wondering if coil for soleniod breaking down.
Swa with redundant air pump...move plug and vac line onto air pump 1. That will eliminate coil.

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Done all of that already... Checked all the wiring.
I've activated the actuators under vacuum... Everything checked out OK.
My only thought is the power supply to the solenoids is failing

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 01, 2019, 08:02:55 PM
Quite a few things powered off that so youd have multiple codes...
Wondering if coil breaking down with heat?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 01, 2019, 08:32:50 PM
Quote from: boosted on June 01, 2019, 08:02:55 PM
Quite a few things powered off that so youd have multiple codes...
Wondering if coil breaking down with heat?

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Maybe. I'll try and source another.

It was just really random.
Was on the M4 for at least 5 mins. Outside lane and out of no where just died for a second, then come back to life with the eml on

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 01, 2019, 08:36:22 PM
Intermitent faults are a pain to find. Id swap coils as suggested. Eliminate that from query.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 02, 2019, 08:49:23 PM
Had any one got a spare solenoid valve?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 07, 2019, 09:31:02 AM
Right getting done where with this now.
I swapped the vac lines and plugs over between SAP and SSV and now the hesistation under full accelation has returned.
So I've got one coil which is slow to respond and one which dies under heat.
I'm going to swap the coil at the moment over for the spare I bought and probably buy another spare to replace the VDI solenoid


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 07, 2019, 06:22:19 PM
Fingers x.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 07, 2019, 08:31:55 PM
I was having a chat with Jamie at Coombe about lightened flywheels and I'm still confused by it.
Will a 5 speed lightened flywheel fit 6 speed engine?
And will a 6 speed clutch fit a 5 speed lightened flywheel?
Lastly are rx8 5 & 6 speed prop shafts the same?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 10, 2019, 08:25:18 PM
Clive has a lightened flywheel and counter weight available which I'll be buying tomorrow :)
Also tracked down a 5 speed box. Are the output shafts on the propshaft the same size on both 5 & 6 speed?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on June 11, 2019, 01:45:13 PM
Many thanks for the sale Paul and don't worry the prop-shafts are interchangeable. 
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 13, 2019, 08:46:10 PM
:)
Picking up gearbox tomorrow(https://uploads.tapatalk-cdn.com/20190613/45c5f05af71925250b79d471cd91956a.jpg)(https://uploads.tapatalk-cdn.com/20190613/b294b1dfe72685d6a8f1c488c408fd85.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 13, 2019, 09:19:08 PM
Nice!

From what I understand, you run a clutch from a 6 speed on to the flywheel designed for a 6 speed  whether it's lightened or not.

Don't put a 6 speed clutch on a 5 speed flywheel or vice versa, I think they are different sizes.

The input shaft MUST be the same as 5 speeds swaps have been done.

I can guarantee that the output shaft is the same as I plugged the 5 speed gearbox with the old carbon prop shaft to stop it losing oil while I'm storing it.

Sorry for confusing you lol
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 13, 2019, 09:21:43 PM
Think I'm late to the party ........ Again

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 13, 2019, 09:26:08 PM
Quote from: Jamie R on June 13, 2019, 09:21:43 PM
Think I'm late to the party ........ Again
Lol! No worries

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 15, 2019, 07:22:15 PM
Box out. Very f*cked. Lots of play on input shaft.
Clutch is fine.
5 speed box to go on.
Half way there now(https://uploads.tapatalk-cdn.com/20190615/fb4884c32e72ef25bbede81e9402b2f4.jpg)(https://uploads.tapatalk-cdn.com/20190615/2505fb4f0b98c2e0a2b02d3b4cfc36dc.jpg)(https://uploads.tapatalk-cdn.com/20190615/d8c0fd1e8e2a4839aeff5859646c2f29.jpg)(https://uploads.tapatalk-cdn.com/20190615/1b3b1ef6bbd74cf12de9cfd00a3fdc56.jpg)

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(https://uploads.tapatalk-cdn.com/20190615/054ae6ae417c333423909df816055336.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 15, 2019, 10:29:09 PM
Going to need to get creative with the grinder tomorrow, the socket my neighbour gave me has metal welded on, that all needs to come off as socket won't fit on(https://uploads.tapatalk-cdn.com/20190615/51fb2314322a43a4e3d16317a0effcd7.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 07:58:11 AM
All back together...

I prefer the 6 speed ratios. The gap between 1st and 2nd is huge...
Might get used to it.

It does pick up well though, I think the ecu is learning still as I did a reset

I dropped the idle back to 800 and its jerking about at low revs. Will be putting that back to 1k when I get home.

Going to look at fabricating an exhaust next

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 19, 2019, 09:36:04 AM
Maybe its something to get used to.

Most of the competition gear sets I've seen over the years calls for a really long first gear and close ratios on the rest.

Same as most sports motorcycles, they do in excess on 70mph in 1st and then its all close ratio.

I guess on the track its rare to get into first unless you're starting off.

Just give it some more beans up to the redline before you shift into second lollll

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 05:48:43 PM
Argh bugger
Exhaust manifold has to come off by the looks of it(https://uploads.tapatalk-cdn.com/20190619/d9662b06b794c49809823448277ae764.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 19, 2019, 06:03:44 PM
Ooops

not enough contact with the exhaust, summat been flexing at the weld by the looks, work hardened, and parent material failure.

All is not lost, repair the crack and put some extra webbing to spread the load and prevent it flexing around the weld.

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 06:04:25 PM
I think it was where I slipped with the torque multiplier doing up the flywheel nut.... Doh

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 19, 2019, 06:13:19 PM
Quite possibly, but its not an ideal situation and could have been weakend prior to you being Popeye lol

Couple of images quickly knocked up. first is your current set up, a simple added webbing brace will prevent any further aggro
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 06:23:24 PM
Check you out with your flashy CAD skills!
I'll see if my neighbour has any spare metal lying about in his workshop.
Cheers

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 19, 2019, 06:36:52 PM
Just a thought...what are your engine mounts like? If there worn or weak then that manifold  mount will acting as an engine mount too. too...worth checking...have you got ant harsh vibrations?
My exhaust is totally isolated from chassis bar 1 silencer mount bobbin.  I put a camera on exhaust shortly after build and despite solid ( landrover) engine mounts engine still moves fair bit id say 5mm til i solid mounted gearbox with again a landrover engine mount.
And whilst looking over your car at Jdm...i did noticed a lambda sensor tad close to chassis tunnel..be a good time to reposition the 02 boss.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 06:41:32 PM
Quote from: boosted on June 19, 2019, 06:36:52 PM
Just a thought...what are your engine mounts like? If there worn or weak then that manifold  mount will acting as an engine mount too. too...worth checking...have you got ant harsh vibrations?
My exhaust is totally isolated from chassis bar 1 silencer mount bobbin.  I put a camera on exhaust shortly after build and despite solid ( landrover) engine mounts engine still moves fair bit id say 5mm til i solid mounted gearbox with again a landrover engine mount.
And whilst looking over your car at Jdm...i did noticed a lambda sensor tad close to chassis tunnel..be a good time to reposition the 02 boss.

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The heat shield was sagging down quite bad. I taped the heat shield back with metal tape. Loads of room now.
Engine mounts however... I think I need to fill them. They're not leaking but I noticed the engine bobbing up and down from underneath when I push the sump

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 19, 2019, 06:42:28 PM
Quote from: Paul_13 on June 19, 2019, 06:23:24 PM
Check you out with your flashy CAD skills!
I'll see if my neighbour has any spare metal lying about in his workshop.
Cheers

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Lol not really skills....... its part of my Job.

Ive done you a pretty picture in 3D

In all seriousness...........Im not expert on really complex stuff, if anyone needs anything knocking up, give me a shout.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 06:49:42 PM
:)

On another note, does anyone have a rx8 exhaust back box lying about? I need the measurements between the tail pipes. Centre - centre

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 19, 2019, 06:58:04 PM
Sorry Paul, cant help you there......... got rid of mine ages ago

on the subject of exhausts I did however weigh in my old Catalytic converter yesterday after Clive and Jon told me to junk it.

Im £330 better off  :13: :13:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 19, 2019, 07:36:54 PM
When manifold off rock engine again...if more then there bad.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 19, 2019, 08:02:29 PM
From memory the RX8 engine mounts aint cheap?

That why you went with Land Rover Jon
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 08:03:14 PM
I think it's cracked the whole way along(https://uploads.tapatalk-cdn.com/20190619/2383f26f38709429d250012dd45326d2.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 19, 2019, 08:05:00 PM
Yep...solid n dirt cheap...made up some spacers in alloy at work to adjust height.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 19, 2019, 08:07:36 PM
That’s no slipping of the torque wrench Paul
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 19, 2019, 08:13:42 PM
That be metal fatique...work hardened due to acting as an engine brace/mount.
I think you can remove and resin fill the engine mounts?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 08:19:17 PM
Quote from: boosted on June 19, 2019, 08:13:42 PM
That be metal fatique...work hardened due to acting as an engine brace/mount.
I think you can remove and resin fill the engine mounts?

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I was going to do that with the engine mounts. I've ordered poly urethane and I have a spare set knocking about

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 19, 2019, 08:20:51 PM
Cool...bloody silly them 8 mounts..mind you the fd came with solid alloy 1s...absolutely horrible vibration and noise throughout car.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 09:37:38 PM
That was a struggle. Don't laugh at the sandals! (https://uploads.tapatalk-cdn.com/20190619/9f68ab32375b8a95250b8b3671a5bcb7.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 09:40:01 PM
Might aswell but a new one lol(https://uploads.tapatalk-cdn.com/20190619/6b73fd350d1493734e407ca512cc344c.jpg)(https://uploads.tapatalk-cdn.com/20190619/69a1f46d98612450aca2acb9dda5dfa1.jpg)(https://uploads.tapatalk-cdn.com/20190619/f543be08e1d5168bb292c3d4a6ffc817.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 19, 2019, 09:42:50 PM
Exhaust gasket blown to shit also(https://uploads.tapatalk-cdn.com/20190619/930c9bffa98306421c2fa79bc08689fb.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 19, 2019, 10:06:24 PM
It's definately seen better days
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 20, 2019, 08:29:16 PM
My neighbour is a legend and has welded the exhaust for me

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 20, 2019, 08:57:18 PM
Happy days.....

In the words of Hannibal from the a-team...... I love it when a plan comes together
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 20, 2019, 11:29:05 PM
All back together. Test drive in the morning

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 21, 2019, 08:01:47 AM
Driving well, low rev lean afr's seems to of disappeared also. My friend at Kam racing has a sports exhaust for a mk3 mx5 made by scorpion which I may look into.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 21, 2019, 08:02:59 AM
Every time I go to Tapatalk to view this thread, I am reminded of my abnormally sized head. Thanks Jamie(https://uploads.tapatalk-cdn.com/20190621/dfbb21c921a8754600c96884cfd76047.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 21, 2019, 08:23:04 AM
OMG hahahahaha I remember that!

I completely forgot about that at combe.

For the record, its looks normal mate.

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 21, 2019, 08:26:26 AM
Quote from: Jamie R on June 21, 2019, 08:23:04 AM
OMG hahahahaha I remember that!

I completely forgot about that at combe.

For the record, its looks normal mate.
Ha thanks

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 21, 2019, 11:20:20 AM
Tis funny....i got a shitty brown car accompanying my fd...(https://uploads.tapatalk-cdn.com/20190621/186cafc86e27bad812057b335f6f2db2.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 22, 2019, 10:29:02 PM
This car is doing my head in now. Since changing the box there's a knocking noise from the front now at low rpm.
The rear arb is knocking - powerflex bushes are wrong size! Not deep enough. I've emailed them.
The exhaust isn't sitting right., pulling to one side on back box.
Going to do a full bolt check all round and see if the arb links have died


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 22, 2019, 10:49:35 PM
Ppf alignment?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 24, 2019, 07:56:52 AM
Rear arb link is dead. One problem pinpointed.
Did a bolt check on the front and all seemed OK. Knocking still there. Need to jack it up and check a few bits.
Ppf looked OK.
Pulled the middle silencer about a bit and the back box is sitting better.
Might take it up the hill climb Sunday at Prescott if I'm allowed :)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 24, 2019, 08:30:58 AM
Might see you there Paul,

The MAC Shelsley membership allows us to get in at Prescott, and its not a million miles from home.

See what FIL is doing, I know there's an event on, I cant remember whether he fancied Shelsley or Prescott.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 28, 2019, 07:00:06 AM
Quote from: Jamie R on June 24, 2019, 08:30:58 AM
Might see you there Paul,

The MAC Shelsley membership allows us to get in at Prescott, and its not a million miles from home.

See what FIL is doing, I know there's an event on, I cant remember whether he fancied Shelsley or Prescott.
Might see you there then :)
Possibly my favourite venue I've been to


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 28, 2019, 07:01:29 AM
I'm contemplating buying this and modifying the back box to fit.
Has any one got a rx8 back box lying about they could measure please? Need the measurements between tail pipes(https://uploads.tapatalk-cdn.com/20190628/0fee177e94634e42c61003b587db2ba4.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 30, 2019, 08:00:51 PM
Is there a way of making the solenoids for vdi/ssv last longer? Thinking of trying to vent the bonnet or engine bay some how.
Had a few blips today on the way to Prescott Hill climb.
Then on the way back, the SAP solenoid kept illuminating the CEL. Low circuit /Heat failure.
I've zero'd that code out now on mazda edit.

Also had a momentary drop in power for a split second and then it resumed normal service.




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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 30, 2019, 09:39:52 PM
I think its time to try a pcm Paul youve been through it all. Had this issue from start maybe the donor had it...happy to send my spare for a test.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 30, 2019, 09:58:55 PM
Quote from: boosted on June 30, 2019, 09:39:52 PM
I think its time to try a pcm Paul youve been through it all. Had this issue from start maybe the donor had it...happy to send my spare for a test.

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Yes please, do you still have my address on pm?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 30, 2019, 10:04:49 PM
Send it again then i defo got it. Worth a try.
I struggled for months with a throttle cut til i swapped in a different pcm.popped a code acted on it job done.
Take a about a week as currently sipping a long island ice tea in Gran canaria..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 14, 2019, 11:06:32 AM
Good news... The replacement rack solved the knocking noise. I ordered a rack from Charles trent off ebay and it turned up damaged sent them an email complaining and they refunded me straight away. All I had to do was swap the steering angle sensor over and it was fine!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 14, 2019, 01:49:23 PM
Good news Paul,

you coming to Beaulieu?

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 14, 2019, 01:51:25 PM
When's that on?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 14, 2019, 03:49:20 PM
2 weeks today...............
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 14, 2019, 03:50:35 PM
http://mazdarotaryclub.com/forum/index.php?topic=84865.15
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 14, 2019, 04:48:49 PM
Just remembered i need to send pcm...ill send tomorow.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 15, 2019, 04:36:52 PM
Quote from: boosted on July 14, 2019, 04:48:49 PM
Just remembered i need to send pcm...ill send tomorow.

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Cheers mate.
Weirdly hasn't done it again...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 16, 2019, 04:26:49 PM
Darn it....blimin forgot....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 19, 2019, 06:42:07 PM
Idle was going crazy earlier. Kept dropping and nearly cutting out. Engine management light lit briefly on each occasion but went out.
Need to plug in diagnostics.
I've added an extra earth on incase earth was dodgy

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 20, 2019, 03:55:27 PM
No fault code with the issue I had yesterday.

Also made progress on the engine mounts. Opened up the mounting holes to slide the mount forward a bit.
Filled them with polyurethane.
Results were good.
The engine is pulling on the mounts about 10-12mm less now. I can't modify the ppf holes as I would lose all travel on the gearstick. The gear turret would also foul the chassis

Some pics for you all(https://uploads.tapatalk-cdn.com/20190720/fc87885cb72188a058d29ae90acabd6b.jpg)(https://uploads.tapatalk-cdn.com/20190720/4270f51922aa84ca9f2bdf07cc98dfab.jpg)(https://uploads.tapatalk-cdn.com/20190720/1927a5a470c11d0fa8e99d4696c29ef7.jpg)
^before
(https://uploads.tapatalk-cdn.com/20190720/c82fb584634e8835ce55d3a9686f9953.jpg)
^after

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 23, 2019, 07:36:29 PM
Engine feels a lot more solid now... Stating the obvious. Doesn't feel like it's flopping about as much

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 24, 2019, 07:17:35 AM
Quote from: Jamie R on July 14, 2019, 03:50:35 PM
http://mazdarotaryclub.com/forum/index.php?topic=84865.15
I'll see if I can make it. The wife is having a few heart issues at the moment + being heavily pregnant doesn't work out well.
Her heart went into 15 seconds of VF the other week. For this who know what it is, it's bloody scary!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 24, 2019, 09:40:05 AM
Jesus,  its all going on
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on July 24, 2019, 01:24:53 PM
Sorry to hear that Paul. It must be an extremely worrying time, especially with the pregnancy to complicate matters. I hope all turns out OK for your wife and the new arrival.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 24, 2019, 01:41:23 PM
Yes mate fingers crossed all ok.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 27, 2019, 07:50:49 AM
There's certainly a lot of bad luck going round. Got everything crossed.

On a lighter note......

You still running the 5 speeder?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 07:55:58 AM
Quote from: Jamie R on July 27, 2019, 07:50:49 AM
There's certainly a lot of bad luck going round. Got everything crossed.

On a lighter note......

You still running the 5 speeder?
Yeah. Really don't like it. Looking to replace the input shaft bearing on the 6 speed and swap the box.
The gap between first and second is huge. The other gears are a bit odd as well

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 27, 2019, 08:55:25 AM
Fair enough.

Maybe its an application thing. Clive swears by his.

Ill have to try both when mines finally up n running.

See which suits driving style, car weight, engine set up, etc.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 09:26:30 AM
Maybe. I think if I had more power it wouldn't bog when changing from 1st to 2nd so bad. It's really ruined the driving experience for me.
The lightened flywheel has probably compounded the issue.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on July 27, 2019, 10:18:25 AM
Quote from: Paul_13 on July 27, 2019, 09:26:30 AM
Maybe. I think if I had more power it wouldn't bog when changing from 1st to 2nd so bad. It's really ruined the driving experience for me.
The lightened flywheel has probably compounded the issue.

Sounds like something else is going on as the Flywheel would only affect getting off the line not once your up n running, indeed it should help as the revs fall away fast allowing for faster gear changes.

Out of interest what diff ration does the car have because a high ratio would have the same effect. You really need a 4.4 or a 4.7 so maybe the MX-5 one is higher ?   
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 10:23:26 AM
4.1 diff ratio - 5 speed lsd




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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 10:43:10 AM
I know what boosted is thinking.... Should of gone with Rx8 subframe...

I wouldn't know where to start looking for a replacement 4.7 crown and pinion for mine

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 27, 2019, 10:53:17 AM
I thinking about coolant...or where is my coolant going to be more precise...lol

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 10:58:39 AM
Ha

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 27, 2019, 11:11:38 AM
5.1 120 top end but rapidooo.
4.4 rx8 series 4.7 rx8 r3.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 27, 2019, 01:06:01 PM
IF you have a 4.1 diff, thats where the problem potentially lies
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 01:09:41 PM
It's either 3.7 or 3.9. They are the other options

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 01:13:08 PM
I'm wondering if the ecu isn't recognising it's a 5 speed box. Flat foot shift no longer works.
There no switch on mazdaedit to change the gear config

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on July 27, 2019, 01:26:17 PM
Quote from: Paul_13 on July 27, 2019, 01:09:41 PM
It's either 3.7 or 3.9. They are the other options

There you go Paul, 100% there's your reason as the gears are now spaced  much further apart which is why you have the "issue" you think you have,

Either Ratio is way way too high.


I tried a 4.3 in my road RX-8 and I think this is the highest ratio that will work against an NA  RX-8 , the diffence from just 4.4 to 4.3 was very very noticeable with 1st gear in particular becoming noticeably longer, also much quieter on motorways in top.       
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 01:29:09 PM
Ok. There's not a lot I can do to move away from the diff I have then (4.1 ratio)
I'll go back to a 6 speed box.
Solved that one then

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 27, 2019, 01:32:52 PM
Supercharger?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 01:34:37 PM
Honda s2000 diff fits a mx5. Not sure if it fits NA/NB or NC

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 01:34:57 PM
Quote from: boosted on July 27, 2019, 01:32:52 PM
Supercharger?

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Don't.... I've been looking. And turbo

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 27, 2019, 01:38:56 PM
Quote from: Paul_13 on July 27, 2019, 01:34:57 PM
Quote from: boosted on July 27, 2019, 01:32:52 PM
Supercharger?

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Don't.... I've been looking. And turbo

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Both?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 01:40:33 PM
Any one got a tip for getting the input shaft bearing off? Atkins rotary/mazda sell replacements.
I've take both split rings off. Can't get on the bearing with a puller (https://uploads.tapatalk-cdn.com/20190727/0170f2cc75da60dd36876a7200c9845a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 27, 2019, 01:40:59 PM
No and no.....cheaper to put an rew....( rx7 engine ) in and more reliable.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 27, 2019, 01:45:04 PM
Ref bearing i would have thought youd withdraw gear assembly complete out of casing. Then pulloff with std puller.
Weve got some fancy pullers here that go on inside of inner or outer race after digging seal out. Bearing is scrap then but gets em out.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 01:46:57 PM
Or reverse the whole conversion and put a 2.5 MZR/duratec engine in...










but where is the fun in that.

Seriously though, I have been looking at Rx7 engines but I can't find one. There is a kit now for putting a REW engine in rx8.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 01:48:29 PM
Quote from: boosted on July 27, 2019, 01:45:04 PM
Ref bearing i would have thought youd withdraw gear assembly complete out of casing. Then pulloff with std puller.
Weve got some fancy pullers here that go on inside of inner or outer race after digging seal out. Bearing is scrap then but gets em out.

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Looking at that shortly. But major ball ache. I've not rebuilt a gearbox before.
In my  eyes, the input shaft bearing needs changing and that's an easy way to achieve it by pulling off the bearing as it is now

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 27, 2019, 01:49:48 PM
Pah...200hp...souless dull engine..cams throttle bodys ecu 250hp if you lucky...lots of money....
S2000 or k20...k20 my choice.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 27, 2019, 01:51:05 PM
Weld 2 lugs on?
Or another 6 speed plenty about..60quid going rate.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 01:51:06 PM
I've blown up around 10 piston engines... Mostly Peugeot gti6 engines.
Don't want to go back to piston. Too many moving parts

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 01:51:32 PM
Quote from: boosted on July 27, 2019, 01:51:05 PM
Weld 2 lugs on?
Or another 6 speed plenty about..60quid going rate.

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Where are you looking? Ebay has nothing of that value. I'm not on face book

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 27, 2019, 01:52:46 PM
Thall be that flat shifting mate lol. And ern.....there French....lol.
I used to add £5 per hour french tax when working on french cars....and grease up my 3 elbow.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on July 27, 2019, 01:54:59 PM
Big pete rx8 forum...maybe im wrong but last 1 i sold 60 quid... i got a spare in my garage if desperate...it was going with westy as spares package. Came out of crashed road car 80k onit. I have engine in Westy.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: rote8 on July 27, 2019, 07:24:44 PM
Another one for 'bigpete' at Boston Rotary who should have one available or can source. https://bostonrotary.wixsite.com/bostonrotary (https://bostonrotary.wixsite.com/bostonrotary)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 27, 2019, 07:45:24 PM
Thanks I've sent him an email

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 28, 2019, 08:37:17 PM
I don't like gearboxes(https://uploads.tapatalk-cdn.com/20190728/e98f21eaf8117007008e9520fa0522c4.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 28, 2019, 09:36:12 PM
Ta dah.
Now trying to work out how to put new bearing on... (https://uploads.tapatalk-cdn.com/20190728/ad911bf504122a96fcd987b5371ad389.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 28, 2019, 09:42:57 PM
Long tube over the shaft that bears on the inner race of the hew bearing and drive it home.

Don't do that in case it beaks summit internally on the gearbox
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 28, 2019, 10:01:27 PM
Refit the bell housing and tap the outer race into the hole?   

If you can wait till tomorrow I'll got a rx8 manual on the gearbox I'll look on there .......
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 02, 2019, 09:32:44 PM
5 speed out. Managed to get box out in just over an hour.
Honkytonk off rx8oc dropped the 6 speed box off at mine, big thanks to him. (https://uploads.tapatalk-cdn.com/20190802/76855d5f3fdf0bbdc43c5a228108325f.jpg)(https://uploads.tapatalk-cdn.com/20190802/e669ed798cb07b51a079d6b1fdc8f12e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 02, 2019, 09:48:46 PM
Good job Paul.

Shame the 5 speeder didn't work of for you !

Hope you start enjoying it again   :icon_thumleft:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 02, 2019, 10:42:08 PM
Just checked the rear diff ratio.... 3.7/9
Not 4.1 like I thought it was.
I've got the 1.8 open diff stashed away, I'll have to check that one see what it is

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 03, 2019, 05:46:36 AM
A 4.4 or 4.7 really gonna make your car fly through the gears. Im sure a cwp is available for your current diff with amount of nc,s in motorports, Roddinsons springs to mind hed know if available.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 07:21:48 AM
I've emailed them. Thanks for heads up

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 03, 2019, 07:34:52 AM
I only now about the 6" then 7" torsen and super fuji,s from the mk1 2 and 2.5s ...not got a clue on the nc...theres bound to be a solution out there plenty of NCs hillclimb. I was trying to work out with your current diff ratio your top speed gotta be 160 plus lol.
I think it will be the best mod on your car....apart from the engine...
I wonder if an 8 cwp will bolt into an nc diff...


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on August 03, 2019, 10:29:42 AM
Hi Paul.
As you will know the NC and RX-8 share the same floor pan so, having looked for an alternative gear ration for the NC diff and drew a blank, here's a suggestion.

As you know, to turn your car into a proper flying machine, you really need an RX-8 Diff.

Looking at the picture, it mounts the same and looks like the same width and drive shaft sizes, but the nose looks shorter.

I have an RX-8 diff you can borrow for measuring purposes to see if this will work.

If the wheelbase on both cars is the same, I suspect you will be able to use an RX-8 Prop and power plant frame and just bolt it all in ?       
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 10:43:41 AM
Thanks Clive. I believe the ppf mounting bolts are ever so slightly different. I did a few measurements when I carried out the conversion. The actual diff bracket/mounting points are the same.

I wonder if it's a case of just swapping the inner cv cups?

I keep reading that Honda s2000 diffs fit nb mx5's and I believe they're the same size as nc

I have an rx8 diff on the donor car, just a pig to get to as it's in a council garage.

Different wheel base. Mx5 is a bit shorter

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 10:46:37 AM
I'm going to double check the open diff I have and see if it's 4.1,if it is, ill swap the crown wheel and pinion in and go from there.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 03, 2019, 11:00:53 AM
Go 4.4 Paul. I run a 4.1 in the Westy on 13s...diff calcs the top speed is 150...4.4 would be 130. 4.1 will be compromise.
That 1 i was involved in they chopped abit out the middle of the 8 ppf.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 11:03:54 AM
Not fussed about top speed

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 11:17:53 AM
Quote from: boosted on August 03, 2019, 11:00:53 AM
Go 4.4 Paul. I run a 4.1 in the Westy on 13s...diff calcs the top speed is 150...4.4 would be 130. 4.1 will be compromise.
That 1 i was involved in they chopped abit out the middle of the 8 ppf.

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Did they swap the mx5 hubs /driveshafts for rx8 items?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 03, 2019, 11:19:17 AM
Actually....forget the 4.1 go for the 4.4 or 4.7...
I was having a track battle few years back in the fd against a honda accord type r...
I had 1 and standard due to final drive they annoyingly drop out of vtec...i could not get by it it slung shot outta corners...id catch it going into bends znd it would drive away from me coming out of corners....
Avon rise i would on its arse..but too dodgy to overtake...he had an altered final drive summit crazy like 5.1...he said best mod he done. But he said first was useless...gotta find the balance....i reckon 4.4

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 03, 2019, 11:23:18 AM
Quote from: Paul_13 on August 03, 2019, 11:17:53 AM
Quote from: boosted on August 03, 2019, 11:00:53 AM
Go 4.4 Paul. I run a 4.1 in the Westy on 13s...diff calcs the top speed is 150...4.4 would be 130. 4.1 will be compromise.
That 1 i was involved in they chopped abit out the middle of the 8 ppf.

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Did they swap the mx5 hubs /driveshafts for rx8 items?

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So long ago mate i cant 100% remember but i was led to believe it was front n rear subframe complete swap with a section cut n shut from ppf.  Car did race of reremberance Anglessly then pretty much disappeared after that....i look for it on ebay lol.
But i did splice the mx5 abs sensors into the rx8 loom so may it was still running mx5 hubs...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 11:30:42 AM
Quote from: boosted on August 03, 2019, 11:23:18 AM
Quote from: Paul_13 on August 03, 2019, 11:17:53 AM
Quote from: boosted on August 03, 2019, 11:00:53 AM
Go 4.4 Paul. I run a 4.1 in the Westy on 13s...diff calcs the top speed is 150...4.4 would be 130. 4.1 will be compromise.
That 1 i was involved in they chopped abit out the middle of the 8 ppf.

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Did they swap the mx5 hubs /driveshafts for rx8 items?

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So long ago mate i cant 100% remember but i was led to believe it was front n rear subframe complete swap with a section cut n shut from ppf.  Car did race of reremberance Anglessly then pretty much disappeared after that....i look for it on ebay lol.
But i did splice the mx5 abs sensors into the rx8 loom so may it was still running mx5 hubs...

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Someone in rx8 oc enlightened me to the fact its not a straight swap as such. Chassis bolt isn't long enough to accommodate the subframe bushe. There must be a differential/c&p which will. Someone has fitted a ND diff to NC.
PPF isn't the NC item so I wonder if the ND one swaps over

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 03, 2019, 11:35:55 AM
This was Academy Motorsport opp North so full motorsport outfit...racing Ginettas and now Astons in support of btcc so full facilities.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 01:46:15 PM
Moment of truth(https://uploads.tapatalk-cdn.com/20190803/3637c9362018d84612c091a3d1ec7b69.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 05:44:33 PM
3.7 again....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 03, 2019, 05:52:07 PM
 :c002:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 07:36:40 PM
Back on the floor. Test drive later(https://uploads.tapatalk-cdn.com/20190803/00b0494bb0ee7bae02245c321345e131.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 09:51:24 PM
Holy (censored)ing shit, this thing is on point again. Almost feels like the ecu was in limp mode with the 5 speed box. I'm getting 48 mph instead of 55mph in 1st and 78 mph instead of 88mph in 2nd.

I changed the back box to the stainless steel toyosport one I had lying about, scared the living day lights out of some lads in a micra.
The whole road lit up behind me like a speed camera had flashed the flame was that big.

Happy with this again :)



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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 03, 2019, 10:03:58 PM
Just imagine a 4.4 then lol 

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 03, 2019, 10:08:13 PM
I have been doing a bit of thinking...
The engine is in an mx5 which is lighter than a rx8, I'm running 17" wheels instead of 18".
Smaller /thinner disc brakes all round...
I think a 4.1 should do.
I'm really struggling to find anything other than the standard ratios for the nc. I'm going to pull the 1.8 open diff apart and do some measurements.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on August 04, 2019, 10:06:45 AM
4.1 on 17's should work ok, with out working it out, this would  probably be like an RX-8 with a 4.3 .

Interesting you say the boinger weighs more, Rotary is 106 Kilo , any idea how much your removed engine weighed in at ? 
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 04, 2019, 10:14:07 AM
Sorry it should of read that the mx5 is lighter than the rx8.

Mx5 is 1110kg standard
Rx8 1373kg standard

Engine weight I'm struggling to find figures

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on August 04, 2019, 02:01:30 PM
Quote from: Paul_13 on August 04, 2019, 10:14:07 AM
Sorry it should of read that the mx5 is lighter than the rx8.

Mx5 is 1110kg standard
Rx8 1373kg standard

Engine weight I'm struggling to find figures

OK, still curious about how much the engine weights, any ideas 
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 04, 2019, 02:03:48 PM
Bare mzr block weights 76kg apparently. Then probably 30kg for AC comp/alternator etc

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 04, 2019, 04:07:25 PM
Quote from: clive on August 04, 2019, 10:06:45 AM
Rotary is 106 Kilo , any idea how much your removed engine weighed in at ?

Seems a lot for a tiny lump, is that all in?

I remember pintos we’re around 130kgs
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: re japi on August 05, 2019, 01:33:12 PM
I reckon that abit + 100kg is near. Modern 2 litre four bangers are abit less.. .

Pinto engine is very very heavy lump. Even similar Volvo engines are much lighter

Lähetetty minun G8141 laitteesta Tapatalkilla

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 05, 2019, 01:40:23 PM
I wouldn't disagree, I've never carried one, only dragged renesis + sub frame + gearbox, across gravel from under the RX8.

I know its HEAVY. I assumed the 6 speed gearbox was heavier than the engine.

I'll find out soon enough on tear down lol
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 05, 2019, 07:30:36 PM
Just a thought....
My throttle blip at 5k ish... It only happens when it's warm.
Would the circuit wiring be falling under heat from the coolant loop through the body?
Might bypass it

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 24, 2019, 08:20:05 AM
I by passed the throttle body and seemed to of helped so far.
Also picked up a decat pipe from a rx8oc member. Got it home and it measured at 76mm on the centre section, bonus.
Going to cut the reducer off and weld the flange straight on (https://uploads.tapatalk-cdn.com/20190824/f9441c3acbb8ae075d9be2eba85b4028.jpg)(https://uploads.tapatalk-cdn.com/20190824/813c67e34e5f6885488375de8e0496b2.jpg)(https://uploads.tapatalk-cdn.com/20190824/b59bf461cb3e083154e133a00c362ae9.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 24, 2019, 08:23:52 AM
Also started to monitor afr's as the engine was getting a bit warm under light throttle 4-5k. Turned out it was leaning out to 17:1.very worrying.
So far I've forced the car to run in open loop and dropped the afr target around this rpm and it's gone back down to 14.7:1 and below.
I've managed to get another maf screen to e if that helps(https://uploads.tapatalk-cdn.com/20190824/50007cc2c4c5894c0aa4db8f722555b5.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 24, 2019, 08:29:50 AM
Sounds like progress Paul
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 24, 2019, 08:34:58 AM
Quote from: Jamie R on August 24, 2019, 08:29:50 AM
Sounds like progress Paul
Getting there. Spent the last week doing all the rear suspension bushes on the wifes bmw e46 touring. Not a fun job. 12 hours solid on one of the days. (https://uploads.tapatalk-cdn.com/20190824/fdc87f29ab44489510624361fdaeb418.jpg)(https://uploads.tapatalk-cdn.com/20190824/947312bb1a6bc94a8eb881666a402e79.jpg)(https://uploads.tapatalk-cdn.com/20190824/7688b9af5c4039583bff80e8ea281840.jpg)(https://uploads.tapatalk-cdn.com/20190824/f55b995c3a7ae89f1be4776dde1f2cab.jpg)(https://uploads.tapatalk-cdn.com/20190824/acd09586d72518e839d701715a9009f7.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 24, 2019, 09:29:12 AM
I hope you thoroughly washed ya hands after messing with that stuff lol 😝
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 24, 2019, 09:34:16 AM
That was French cars I washed my hands of

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 24, 2019, 09:37:10 AM
Sorry french cars all ceased to exist after the finish of the 205 T16 group B car
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 24, 2019, 09:37:42 AM
Quote from: Jamie R on August 24, 2019, 09:37:10 AM
Sorry french cars all ceased to exist after the finish of the 205 T16 group B car
Beast of a car

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 25, 2019, 04:10:25 PM
And again. What is wrong with fuel hose now a days? (https://uploads.tapatalk-cdn.com/20190825/382ad0a308663f8629cc9f1cdbded2a4.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 25, 2019, 04:20:17 PM
Yeah i had to replace all mine...it may be fuel hose but it does not like fuel being spill on the outer surface...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 25, 2019, 04:42:45 PM
Quote from: boosted on August 25, 2019, 04:20:17 PM
Yeah i had to replace all mine...it may be fuel hose but it does not like fuel being spill on the outer surface...

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There's no oil or fuel near it. That's what I can't get my head around

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 25, 2019, 04:47:12 PM
I put brand new hose on it back in March this year!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 25, 2019, 04:51:54 PM
Chinese? Pop to Pirtex..
Get some branded?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 25, 2019, 04:59:54 PM
Quote from: boosted on August 25, 2019, 04:51:54 PM
Chinese? Pop to Pirtex..
Get some branded?

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Halfords...
I've bought some other hose from an online supplier

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 26, 2019, 09:49:29 AM
Some to a friend who's done a bit of research into this and there is some cheap Chinese stuff which isn't r9 grade as advertised. Merlin motorsport sell the correct (expensive) stuff

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 26, 2019, 09:58:57 AM
Ive bought lots of cheap junk from ebay and lots of quality expensive parts from Merlin...there customer service is great too.
Thumbs up for Merlin.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 26, 2019, 07:55:10 PM
Just found these. After weeks of searching! (https://uploads.tapatalk-cdn.com/20190826/df4191ad72a88d44d32c1f57e46cdc38.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 28, 2019, 06:40:46 AM
A few pics of exhaust progress. Cutting the reducer section of the exhaust out to improve flow (https://uploads.tapatalk-cdn.com/20190828/afdd9e27cac1181c9177cc8e5c444278.jpg)(https://uploads.tapatalk-cdn.com/20190828/797870ffa0e0d9570d003bbd82c5e213.jpg)(https://uploads.tapatalk-cdn.com/20190828/7147f5ab4e50d8f16e9f1390f6106026.jpg)(https://uploads.tapatalk-cdn.com/20190828/6d9ebb3346af74a4943495df09c52635.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 28, 2019, 07:08:04 AM
Ahhhhh you been busy too then
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 29, 2019, 06:44:33 AM
Starting to make my own exhaust for a fraction of the price that some companies at charging. Should be reasonably quiet. 6" diameter 76mm bore by 10" long. I'm going to try and squeeze another silencer in where the cat is*cough*
(https://uploads.tapatalk-cdn.com/20190829/b1502bb3b00dbf3d6696b7af6ddaa982.jpg)(https://uploads.tapatalk-cdn.com/20190829/c67222252b1917b7d8e8bea8b1fb4b52.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 29, 2019, 07:24:18 AM
Do you have  a resonator on your system, there was a small one after the cat in stock form.

I fitted one, no idea if it's the right spec, or in the exact spot in relation to the engine, but I'd like to think some of those sound waves get cancelled out.

Just asking coz I've not heard your car running, so dunno if it's loud, or it has an annoying drone at certain rpm.

https://www.google.com/shopping/product/1?q=3+inch+resonator&client=safari&channel=ipad_bm&biw=768&bih=928&tbs=vw:l,ss:44&prmd=sivn&prds=num:1,of:1,epd:6275872973335008073,paur:ClkAsKraX617DjjFOOCbh9FdrhN1dxOoIwTgx-iTLoOLZIcT7upGP6_KiP1BteyPoMsRPu9V6cbUfo46JQ4cI94EqI6VJG3_c6OCs8kHPXGeXifpCTb6W2IpbhIZAFPVH71fCtl31vUwVxQdEwiyBmKzTaXoRQ,prmr:1,pid:6275872973335008073,cs:1

I fitted that coz of the slim body and I have zero room, it has a provision for a sensor if required.

I'm sure you can get one from somewhere in the uk to speed up lead time on delivery.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 29, 2019, 08:56:10 AM
Quote from: Jamie R on August 29, 2019, 07:24:18 AM
Do you have  a resonator on your system, there was a small one after the cat in stock form.

I fitted one, no idea if it's the right spec, or in the exact spot in relation to the engine, but I'd like to think some of those sound waves get cancelled out.

Just asking coz I've not heard your car running, so dunno if it's loud, or it has an annoying drone at certain rpm.



Very loud and boomy under 4k currently with a horrendous drone noise.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 29, 2019, 09:02:49 AM
World is your oyster then.........

I just hope you don't fit a silencer and you don't get a quieter car with the same drone.

Might be a bit of trial and error.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 29, 2019, 09:10:26 AM
ok just read that back and that made no effin sense.

meant .......... a quieter car but still with a drone

.........LOL
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on August 29, 2019, 10:30:14 AM
For the NC Racing Beat silencers, they offer three lengths of tail pipe to keep drone under control with the different bumper shapes, so maybe extending the tail pipes will help. 
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 29, 2019, 10:56:30 AM
that's a fair point,

I don't always think of RBE when I think of MX5's

my bad
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 29, 2019, 10:59:32 AM
Quote from: clive on August 29, 2019, 10:30:14 AM
For the NC Racing Beat silencers, they offer three lengths of tail pipe to keep drone under control with the different bumper shapes, so maybe extending the tail pipes will help.

That is an issue I've had with Pug 205's previously. I was going to extend the tail pipes out a bit further  :icon_thumright:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on August 29, 2019, 01:39:46 PM
I wish it wasn't that way Jamie as you know where my passion lies, but without MX-5 sales I'm pretty sure we wouldn't be in business :( 
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 29, 2019, 01:40:31 PM
Quote from: clive on August 29, 2019, 10:30:14 AM
For the NC Racing Beat silencers, they offer three lengths of tail pipe to keep drone under control with the different bumper shapes, so maybe extending the tail pipes will help.

Heres a thought (for myself, because Im being selfish, nothing new there)

If I fitted an exhaust tip to my Rotus system that had a downturn and directed exhaust to the floor, would you think that would be preferable in terms of using the floor to "deaden" the noise levels?

Ive seen westfields etc in the past with a bend pointing slightly down after the silencer, I thought it was to stop shooting flames at pedestrians lol
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 29, 2019, 01:42:12 PM
Quote from: clive on August 29, 2019, 01:39:46 PM
I wish it wasn't that way Jamie as you know where my passion lies, but without MX-5 sales I'm pretty sure we wouldn't be in business :(

I was looking on wiki this morning about the fiat/abarth 124, I didn't know it was the same base roots as the mx5
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 29, 2019, 01:43:55 PM
Quote from: clive on August 29, 2019, 01:39:46 PM
I wish it wasn't that way Jamie as you know where my passion lies, but without MX-5 sales I'm pretty sure we wouldn't be in business :(

Well, my shopping wish list for RBE is getting bigger as I near the stage of strip down and buying new parts for the final build up...... so Ill do what I can to put some "Jam on the bread"
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on August 29, 2019, 01:45:26 PM
Racing Beat make some silencers that point to the ground to cut noise.

I have an elbow for the race car that I use for extra low noise limits.
I have used it enough times to know it cuts 2 decibels off the static noise tests.

Yes, we also sell parts for the  Fiat124 made by Mazda as well.     
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on August 29, 2019, 01:46:28 PM
Quote from: Jamie R on August 29, 2019, 01:43:55 PM

Well, my shopping wish list for RBE is getting bigger as I near the stage of strip down and buying new parts for the final build up...... so Ill do what I can to put some "Jam on the bread"

:great: I like Jam  :13:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 29, 2019, 08:03:56 PM
More exhaust progress(https://uploads.tapatalk-cdn.com/20190829/0813075af53de41cb8d8836e13ac8dfb.jpg)(https://uploads.tapatalk-cdn.com/20190829/9bbdc80bd58fe713519b68c66ec37539.jpg)(https://uploads.tapatalk-cdn.com/20190829/211909d690f4411c5b149d80eb7f205c.jpg)(https://uploads.tapatalk-cdn.com/20190829/126118130c3f10d1033544ff0ef136b3.jpg)(https://uploads.tapatalk-cdn.com/20190829/16c49d4948333fd2b75abc9c82c43dd4.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 04, 2019, 08:35:19 PM
Bit of a size difference! Got to chop 150mm off the pipe before the flange to make it fit(https://uploads.tapatalk-cdn.com/20190904/1b362a441867146e0fdb187ccb9150b4.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 04, 2019, 09:08:29 PM
Make it fit mate, take no prisoners


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 04, 2019, 09:14:48 PM
Sounds sexual

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 06, 2019, 07:46:28 PM
Couldn't of fitted better. Need to jiggle the resonator block over a bit. The old exhaust was close. (https://uploads.tapatalk-cdn.com/20190906/1890db1a49dda29ccb483c10d10ca710.jpg)(https://uploads.tapatalk-cdn.com/20190906/777a7bb23d0c7396f31b7c22f31f45fc.jpg)(https://uploads.tapatalk-cdn.com/20190906/52deeecfb1d46060811b6ddac9f4d010.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 07, 2019, 09:42:26 AM
Nice job Paul !!


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 07, 2019, 02:40:17 PM
Modified the inlet so there are now 2 maf screens(https://uploads.tapatalk-cdn.com/20190907/15d607b415c5546a940bed579f677a80.jpg)(https://uploads.tapatalk-cdn.com/20190907/cc91a70fc3f94c20089ba6f230d128a2.jpg)(https://uploads.tapatalk-cdn.com/20190907/b45665c7cce5763f4b5138cd06571f38.jpg)(https://uploads.tapatalk-cdn.com/20190907/1c468d84413bc0c11a6a1221829c2740.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 08, 2019, 09:21:26 AM
Car is a lot smoother down low now and the afr aren't so erratic

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 08, 2019, 09:43:26 AM
Nice to know, I’m running (well when it’s finished) 2, but either side of a smooth radius 90 degree bend.

Air “flow” shouldn’t be affected by the bend..... lol fingers crossed


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 09, 2019, 09:04:30 AM
The correct back box arrived :) minimal cutting required(https://uploads.tapatalk-cdn.com/20190909/ae8b54e00670109066b52fa647e53bf3.jpg)(https://uploads.tapatalk-cdn.com/20190909/fbb9e6f85c746bd1e68689e9c0b4cebe.jpg)(https://uploads.tapatalk-cdn.com/20190909/5241efc1a9e11f7a155222233e578e38.jpg)(https://uploads.tapatalk-cdn.com/20190909/4d558d61edb2cf564f9f44f710bcdd77.jpg)(https://uploads.tapatalk-cdn.com/20190909/e07964707372f45543a4e8f8a8bf96a5.jpg)(https://uploads.tapatalk-cdn.com/20190909/5deef4370c7ff2e0aa87a73ff81d524b.jpg)(https://uploads.tapatalk-cdn.com/20190909/2a606fba4ff4f630da977065faef27a1.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 09, 2019, 09:30:10 AM
Nice, looks like a relatively simple diy build.

Should look good with some new tips
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 09, 2019, 09:45:39 AM
Quote from: Jamie R on September 09, 2019, 09:30:10 AM
Nice, looks like a relatively simple diy build.

Should look good with some new tips
They're on the way

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 09, 2019, 10:22:58 AM
Quote from: Jamie R on September 09, 2019, 09:30:10 AM
Nice, looks like a relatively simple diy build.

Should look good with some new tips
A lot cheaper as well. Cobra mx5 back box is £400-500. I've built whole system for less

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 09, 2019, 12:31:07 PM
Quote from: Paul_13 on September 09, 2019, 10:22:58 AM
Quote from: Jamie R on September 09, 2019, 09:30:10 AM
Nice, looks like a relatively simple diy build.

Should look good with some new tips
A lot cheaper as well. Cobra mx5 back box is £400-500. I've built whole system for less

No meaning to be a wet blanket but if you use conventional exhaust boxes on a rotary you will rapidly end up with an empty can because the stuffing will burn out.

From memory they need to have Rockwool inside.

To give an idea of heat, on the MK 2 version of the RX-4 which was the first time the 13B engine appeared, unlike mine it had a huge back box.
Dealers were instructed to tell new owners not to park on grass after a long run for fear of setting the grass alight  :wee_hee:     
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 09, 2019, 12:40:18 PM
Quote from: clive on September 09, 2019, 12:31:07 PM
Quote from: Paul_13 on September 09, 2019, 10:22:58 AM
Quote from: Jamie R on September 09, 2019, 09:30:10 AM
Nice, looks like a relatively simple diy build.

Should look good with some new tips
A lot cheaper as well. Cobra mx5 back box is £400-500. I've built whole system for less

No meaning to be a wet blanket but if you use conventional exhaust boxes on a rotary you will rapidly end up with an empty can because the stuffing will burn out.

From memory they need to have Rockwool inside.

To give an idea of heat, on the MK 2 version of the RX-4 which was the first time the 13B engine appeared, unlike mine it had a huge back box.
Dealers were instructed to tell new owners not to park on grass after a long run for fear of setting the grass alight  :wee_hee:   

Lol glad I bought a repackable one, mine has like a white wadding blanket that wraps around the perf tube. When you mean rock wool you mean like the loft insulation stuff, I know you can get the stainless steel “wool” as well.



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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 09, 2019, 01:09:21 PM
I'll get a repackable mid box. They're bloody expensive. Bit stuck on the back box but it is what it is

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 09, 2019, 01:26:50 PM
Tail pipes now at correct centres(https://uploads.tapatalk-cdn.com/20190909/96e91db43bd427b959b851956cd711ef.jpg)(https://uploads.tapatalk-cdn.com/20190909/a6081dbe37f44a5c94905532c59b5535.jpg)(https://uploads.tapatalk-cdn.com/20190909/d84bf69b464e4ffc61d396629b12e99f.jpg)(https://uploads.tapatalk-cdn.com/20190909/919677c69edc5c1f9ab2c51c2a4642fe.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 09, 2019, 01:30:32 PM
Quote from: Paul_13 on September 09, 2019, 01:09:21 PM
I'll get a repackable mid box. They're bloody expensive. Bit stuck on the back box but it is what it is



If you can hang on I may have an option, I have some unused Racing Beat mid boxes but I cant get you pictures with measurements till tomorrow evening.

They are the front boxes as used in the mid pipe shown, If they are any good to you £60 would buy one.

It would cost but you can also get Rotor shaped ones but they won't be £60  ;)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 09, 2019, 02:10:00 PM
That would be handy. Could you get some measurements please.

Cheers

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 09, 2019, 02:23:29 PM
...
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 10, 2019, 03:46:24 PM
Any joy Clive?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 10, 2019, 09:00:03 PM
Here we go
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 10, 2019, 09:29:53 PM
That's ideal. What's the internal/external diameter of the pipe? How many do you have?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 10, 2019, 09:38:52 PM
Quote from: clive on September 10, 2019, 09:00:03 PM
Here we go
If you have 2 and they're 3" pipe diameter I'll take 2

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 11, 2019, 11:10:56 AM
Yes, I have quite a few of these and they are for 3" diameter, so two for £120 delivered.

Pop me a PM and we can sort it out if you want. 

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 11, 2019, 11:23:44 AM
Done
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 11, 2019, 11:35:07 AM
Can i have 1 pls Clive. Ta Jon.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 11, 2019, 01:36:26 PM
Quote from: clive on September 11, 2019, 11:10:56 AM
Yes, I have quite a few of these and they are for 3" diameter, so two for £120 delivered.

Pop me a PM and we can sort it out if you want.

Clive can you send me your Paypal please. I'm not sure if the Forum PM system is working.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 11, 2019, 01:52:25 PM
Here we go gentlemen.

PayPal is sales@racingbeateurope.com thank you
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 11, 2019, 01:54:20 PM
All paid.

Do you need my address or has that come through on the PM?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 11, 2019, 01:54:44 PM
Quote from: clive on September 11, 2019, 01:52:25 PM
Here we go gentlemen.

PayPal is sales@racingbeateurope.com thank you

Some jam going on the bread this week ole bean
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 11, 2019, 02:51:25 PM
Paid. No hurry on mine...Pauls is priority over me.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 11, 2019, 06:43:47 PM
Quote from: Jamie R on September 11, 2019, 01:54:44 PM
Quote from: clive on September 11, 2019, 01:52:25 PM
Here we go gentlemen.

PayPal is sales@racingbeateurope.com thank you

Some jam going on the bread this week ole bean

Many thanks, we will send these out tomorrow.
Jon are you back yet?.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 11, 2019, 07:00:08 PM
Please please please be here for Friday/Saturday

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 11, 2019, 07:04:08 PM
Im here mate...ive not been anywhere lol.
Normal grind for me.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 11, 2019, 08:09:55 PM
3 mounts welded on. Snapped one bending it to suit pipe diameter d'oh!

10 mm out mount to mount, I'll get that on the rubber mounts(https://uploads.tapatalk-cdn.com/20190911/2e3754a79e0652a3de84d68e02e589a2.jpg)(https://uploads.tapatalk-cdn.com/20190911/c2fe6839f7e83d76224127bf4664a947.jpg)(https://uploads.tapatalk-cdn.com/20190911/ec4324791b09bcbbf4028f422feb47c0.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 12, 2019, 02:54:25 PM
Fail(https://uploads.tapatalk-cdn.com/20190912/4ba09a8b09b5b81943d18e8b9b67b13c.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 12, 2019, 02:56:40 PM
Lucky I didn't have a fire(https://uploads.tapatalk-cdn.com/20190912/41f78ae615c5560719fbfcb2655f8750.jpg)(https://uploads.tapatalk-cdn.com/20190912/3c5af69acf6b00f94fd3e8a1a2e60627.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on September 12, 2019, 02:56:55 PM
Did you use the rx8 subframe with mx5 suspension arms? Did it all just bolt together easy

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 12, 2019, 02:58:38 PM
Quote from: Grant Monkhouse on September 12, 2019, 02:56:55 PM
Did you use the rx8 subframe with mx5 suspension arms? Did it all just bolt together easy

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Rx8 front subframe.
Mx5 arms and rx8 arms are the same. Rx8 hubs are different. If you want to retain rx8 dsc/abs you'll need to use rx8 hubs

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on September 12, 2019, 03:14:31 PM
Quote from: Paul_13 on September 12, 2019, 02:58:38 PM
Quote from: Grant Monkhouse on September 12, 2019, 02:56:55 PM
Did you use the rx8 subframe with mx5 suspension arms? Did it all just bolt together easy

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Rx8 front subframe.
Mx5 arms and rx8 arms are the same. Rx8 hubs are different. If you want to retain rx8 dsc/abs you'll need to use rx8 hubs

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I just want to run the front subframe and reuse the mx5 suspension etc

Thanks

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 12, 2019, 03:25:10 PM
Does any one know where to get one of these gaskets from?
Really struggling to find one(https://uploads.tapatalk-cdn.com/20190912/af59f7d2ecd93182f3456704463c55aa.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 12, 2019, 04:13:04 PM
Pics. Need to cut a section out of the mid pipe bend. Couldn't find a 3" 5 degree bend weirdly(https://uploads.tapatalk-cdn.com/20190912/ea1ce51ed48ef82aff6d7312c40350df.jpg)(https://uploads.tapatalk-cdn.com/20190912/cc0016809962b7236b2de8eb5cc931ac.jpg)(https://uploads.tapatalk-cdn.com/20190912/6af421af4f7b49dbaf58c264f619bb41.jpg)(https://uploads.tapatalk-cdn.com/20190912/bafed981f4dd6a6fe56564397c212cf5.jpg)(https://uploads.tapatalk-cdn.com/20190912/b5972789aad29e45b3e882581dc0831e.jpg)(https://uploads.tapatalk-cdn.com/20190912/a41e93305c2cd9de489452fea284f56d.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 12, 2019, 04:22:00 PM
Shes in good nick underneath Paul..maybe time for some waxoyl or equivalent.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 12, 2019, 04:23:45 PM
Don't look too close. Think it's been picked up with a fork lift. Was a cat d

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 12, 2019, 04:31:22 PM
Gaskets......

.......Jon showed me a link to an American company that sells the gated sumps, I think they sell the triangle ones I'll have a look
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 12, 2019, 04:33:38 PM
https://www.rx8performance.com/products/3-bolt-exhaust-gasket

There ya go
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 12, 2019, 04:35:42 PM
Quote from: Jamie R on September 12, 2019, 04:33:38 PM
https://www.rx8performance.com/products/3-bolt-exhaust-gasket

There ya go
Cheers. Shipping is 29usd

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 12, 2019, 04:36:35 PM
What?...

Maybe Clive can help? He may have contacts as he's shipping from the states all the while, or racing beat in America may do them
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 12, 2019, 06:43:23 PM
Racing Beat let me have parts sent in for the race car and pop them in the box for me. Only problem is, if they post internally you end up paying the postal charge along with the USA sales tax, in other words its not worth it on a small value item.

Also I hope he plays ball as I have tried to deal with him in the past and its not gone well.

If you need that gasket, personally I would say its really for bodging  purposes to get around flanges that don't line up  ::)   
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 12, 2019, 06:47:07 PM
The issue is the mazda crush gasket is to small for the manifold. The groove is to big. Gasket too small

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 12, 2019, 11:10:41 PM
Managed to find one. Ford mondeo 1.8 dt should just fit... (https://uploads.tapatalk-cdn.com/20190912/6af8506c411596867a96da2eb118adec.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 13, 2019, 08:00:35 AM
Rx8Performance in usa is where my gated fandango sump came from...fantastic product let down by poor customer service.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 13, 2019, 02:11:01 PM
Thanks Clive! (https://uploads.tapatalk-cdn.com/20190913/5f32a4ebb0ff22d636bb5a73a6931c32.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 13, 2019, 02:16:57 PM
Happy days, no excuse now Paul


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 13, 2019, 02:18:52 PM
Just the royal mail who is slacking now. No delivery yesterday. Waiting on essential parts

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 13, 2019, 08:45:19 PM
The mondeo ring didn't fit... But it fits in the mood pipe groove. If I double up the gaskets it roughly works(https://uploads.tapatalk-cdn.com/20190913/f8a43e2c79d2af744134a9786af1fd80.jpg)(https://uploads.tapatalk-cdn.com/20190913/7684a545fcc009bebd0d55f613acc854.jpg)(https://uploads.tapatalk-cdn.com/20190913/cbda7e72a437bdd5acb763ea02470655.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 13, 2019, 08:46:08 PM
More pics. Welding skills are very rusty.
Tips are a temp measure until others turn up.
(https://uploads.tapatalk-cdn.com/20190913/211faa7205cecafc10b8accccf9b146d.jpg)(https://uploads.tapatalk-cdn.com/20190913/0245a82c2db3b353ea598c752c2ebb0a.jpg)(https://uploads.tapatalk-cdn.com/20190913/d96c3ad3401cb0ebdff80454b2299494.jpg)(https://uploads.tapatalk-cdn.com/20190913/e4a484fa14fc8b686fb42179f84bd671.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 13, 2019, 08:47:06 PM
This is going to be a bit tight. Need to lose 20mm on the overall length(https://uploads.tapatalk-cdn.com/20190913/82602cc901e9bc50982418a21a15c806.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 13, 2019, 09:29:34 PM
Seen a lot worse Paul ...... smidge off your wire speed and you’ll be groovy


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 13, 2019, 09:49:25 PM
I upped the amps and turned the wire speed down. Bit better(https://uploads.tapatalk-cdn.com/20190913/f37d2d6628c56b8f3e57bfa3e69e6b12.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 13, 2019, 09:50:14 PM
I'm used to mma pipe welding. Mig is in theory easier but I find it harder

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 13, 2019, 10:02:27 PM
Looks flatter without cutting the parent steel.
Whenever I’ve taught anyone to mig weld at work, I’ve always stressed that setting up the machine right and getting comfortable in position is about 80% of a good weld.
Pulling the trigger and laying it down is the easy bit if the first 2 are right


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 14, 2019, 09:09:47 PM
Boom(https://uploads.tapatalk-cdn.com/20190914/17f65a134301206a1fd01093102f2597.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 14, 2019, 10:09:50 PM
Bit smokey in the garage!
I've created a monster(https://uploads.tapatalk-cdn.com/20190914/ab80083adbc4a10f576e317459109416.jpg)(https://uploads.tapatalk-cdn.com/20190914/f52ba6cee138670fd9ef32c109561c93.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 14, 2019, 11:27:39 PM
Quote from: Paul_13 on September 14, 2019, 09:09:47 PM
Boom(https://uploads.tapatalk-cdn.com/20190914/17f65a134301206a1fd01093102f2597.jpg)

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Sweet
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 15, 2019, 06:03:33 AM
Ahhhh the old Clarke hobby welder.

You've stripped that back to its racing weight haven't you? Lol. No wheels or rubber handle.

Ive still got mine after 20+ years. It's done some work, never been serviced as such. Brilliant tool for the money.

Comes in handy when I don't want to lug the big one about  :13:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 15, 2019, 09:55:52 AM
Quote from: Jamie R on September 15, 2019, 06:03:33 AM
Ahhhh the old Clarke hobby welder.

You've stripped that back to its racing weight haven't you? Lol. No wheels or rubber handle.

Ive still got mine after 20+ years. It's done some work, never been serviced as such. Brilliant tool for the money.

Comes in handy when I don't want to lug the big one about  :13:
Borrowed it off of a mate of mine. The daughter knocked the bottle over and properly fudged one of the gauges..... Little turd

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 15, 2019, 10:08:13 AM
Lol ah the joys of parenting

could have been worse, could have a pressurised gas bottle flying around from a snapped off gauge..........
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 15, 2019, 02:26:58 PM
All back together. Not happy with the gasket arrangement(https://uploads.tapatalk-cdn.com/20190915/1349351d13e778d3ff9789c270ccdbe9.jpg)(https://uploads.tapatalk-cdn.com/20190915/99e4b4cb2e31a8383de4c729210802bf.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 15, 2019, 02:29:23 PM
Does it blow?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 15, 2019, 02:30:14 PM
Got to wait for the family to wake up first.....

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 15, 2019, 02:33:50 PM
Lots of clearance every where and it's sitting  straight(https://uploads.tapatalk-cdn.com/20190915/b4b154e2cc57b6d37c8357494eeb1160.jpg)(https://uploads.tapatalk-cdn.com/20190915/f54cb83740764b6408c5d5ff73c6be9d.jpg)(https://uploads.tapatalk-cdn.com/20190915/7fe13e6f52a45e6ea5a4e20f9f4fbb34.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 15, 2019, 02:38:46 PM
Tail pipes should sit nicely. I wanted to get them away from underneath the car to reduce drone(https://uploads.tapatalk-cdn.com/20190915/14d23df2444f6395289d6793d6b979a9.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 15, 2019, 03:50:06 PM
Ugh trying to upload a vid but file is too large

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 15, 2019, 03:57:20 PM
The seal actually worked. I'm amazed

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 15, 2019, 05:26:59 PM
https://youtu.be/RJuO4VMJy0A

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 15, 2019, 05:34:24 PM
That sounds really nice mate!

2 things...........

1, youre head is sooo big lol (joking)

2, aint ya supposed to let rotarys warm up before ya turn them off? lol
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 15, 2019, 05:35:45 PM
Quote from: Jamie R on September 15, 2019, 05:34:24 PM
That sounds really nice mate!

2 things...........

1, youre head is sooo big lol (joking)

2, aint ya supposed to let rotarys warm up before ya turn them off? lol
Yes...

Haven't really had an issue with flooding. Goes the compression is that good lol

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 15, 2019, 05:36:08 PM
on a serious note, youve worked hard to get all that sorted!

Worth the graft  :13:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 15, 2019, 05:42:09 PM
Yep well done sound great.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 18, 2019, 05:49:31 PM
I just crapped my pants.
Oil level warning light come one. Checked the oil level and it is fine.

I googled the issue and apparently mazda recalled my year of engine for defective sensors

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 18, 2019, 07:04:50 PM
Quote from: Paul_13 on September 18, 2019, 05:49:31 PM
I just crapped my pants.
Oil level warning light come one. Checked the oil level and it is fine.

I googled the issue and apparently mazda recalled my year of engine for defective sensors

Wow, that's a result  8)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 18, 2019, 07:06:58 PM
Where you doing any sideways actions? If the level sensor triggers will stay on til cycle off ignition.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 18, 2019, 07:11:59 PM
Quote from: boosted on September 18, 2019, 07:06:58 PM
Where you doing any sideways actions? If the level sensor triggers will stay on til cycle off ignition.

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No sideways action. Just going down a steep hill and coming to a stop at a junction. When I checked the oil level at the road side it was around half way up the dipstick. The ground was uneven though.

When I got home and on level ground, the oil level was probably near 1/4 to 1/3 up the dipstick. The steep hill probably caused the oil to wash to one side and trigger the oil light.

Like you say, it went away after a cycle of the ignition

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 18, 2019, 07:15:00 PM
I had it on track in a S type jdm rx8...yep brown trouser moment...but that car with its soft suspension was on its wing mirrors in the corners.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 18, 2019, 08:42:22 PM
On a positive note, the exhaust sounds mental when at full throttle. Got the same kind of ring to it as the 787b. Obviously doesn't sound anything like the real deal but still sounds awesome.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 20, 2019, 03:52:16 PM
I had a big momentary loss of power at 5k today and the AFR's leaned out a bit afterwards. I bit the bullet and bought a AEM fuel pump. These have quite good reviews. 340LPH (https://uploads.tapatalk-cdn.com/20190920/3567a1a1937cb5066b4ce3dbb19e5511.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 20, 2019, 06:43:49 PM
Hi mate,
Are you sure this is not a bad earth connection...i had same in Westy...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 20, 2019, 06:55:41 PM
I checked all of that a while ago. I stuck another earth on the engine to chassis as a precaution.

I have put that quantum fuel pump back in a couple of weeks ago.

I don't think either of the fuel pumps I have are up to the job

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 21, 2019, 11:06:36 AM
Had a think of what you said and I'm going to run an additional earth off of the pump to chassis. Then run another earth from rear to front of car. (https://uploads.tapatalk-cdn.com/20190921/5c0ad36821e25f6cee902424aad83309.jpg)(https://uploads.tapatalk-cdn.com/20190921/afcfafa88b3c2fefc04111563a45a168.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 21, 2019, 11:47:54 AM
The assembly the fuel pump sits in inside is fuel filter...these can get clogged over time...
Could be the fuel pot assembly ....a fuel pressure gauge will show this... or a momentary lose of power due to a cut in electrical power on a circuit...which is why i suggest checking all the earths. Engine and fuse box earths.
Happy hunting.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 21, 2019, 11:55:29 AM
I ordered the fuel pressure gauge and it never showed up. The company didn't even take the money out the account even though I had the confirmation email...
I was thinking the other day where it had gone.
Going to reorder

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 21, 2019, 12:04:41 PM
Cool.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 21, 2019, 03:55:00 PM
I have now linked the earth points on the front and rear of the car. I also added an extra earth onto the fuel pump loom which goes to the chassis at the back and connects to the engine bay.
Yet to swap the fuel pump due to my daughter projectile vomiting

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 21, 2019, 04:01:41 PM
Quote from: boosted on September 21, 2019, 11:47:54 AM
The assembly the fuel pump sits in inside is fuel filter...these can get clogged over time...
Could be the fuel pot assembly ....a fuel pressure gauge will show this... or a momentary lose of power due to a cut in electrical power on a circuit...which is why i suggest checking all the earths. Engine and fuse box earths.
Happy hunting.

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That first bit only just clicked for me....
Going to buy this(https://uploads.tapatalk-cdn.com/20190921/c27e713f061b57c9ad209da934fda12f.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 22, 2019, 07:51:35 PM
Tonight's job was to fit the AEM fuel pump.

I had an issue where the filter on there was a bit dirty and no matter how much I tried I couldn't get the dirt out of the filter.
The filter also has a plastic bar which sits right across the opening and would probably cause a restriction.

So I looked at modifying the pump bracket to accept a different style filter.

The type of filter I've put on there is less restrictive (hopefully) and a fairly common size /type. The mazda variety is a bit of an oddball.

I could visibly see bubbles in the high pressure filter which moved from top to bottom so I'm fairly happy that filter isn't blocked.(https://uploads.tapatalk-cdn.com/20190922/e9baebdf12009d36286dfb8568401087.jpg)(https://uploads.tapatalk-cdn.com/20190922/9f95df12af74f42a9de237837ce562af.jpg)(https://uploads.tapatalk-cdn.com/20190922/64addcd6480a935074217fd1b7b73116.jpg)(https://uploads.tapatalk-cdn.com/20190922/3bc4d2aba1c729d4d68a36a0e9bb58fe.jpg)(https://uploads.tapatalk-cdn.com/20190922/53c5a814630128faa49a93e788f4e4ac.jpg)(https://uploads.tapatalk-cdn.com/20190922/9d06aadb7e99181df1cd64c7e9bbdbae.jpg)(https://uploads.tapatalk-cdn.com/20190922/0ce9e0ea02b495c6f647287b3b296ad1.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 22, 2019, 07:52:37 PM
Any body know what the VE tables control on the rx8?

I've got a few values which go up to 15-16. Might explain the lean running at low rpm (https://uploads.tapatalk-cdn.com/20190922/5300b04e2796d60aa41ee672093166c5.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 24, 2019, 05:52:08 PM
Hopefully this is the right size. This time lucky(https://uploads.tapatalk-cdn.com/20190924/9b3caa5ebe36c4285035b7c751780dfb.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 27, 2019, 03:36:43 PM
Prefect fit. Woooo! (https://uploads.tapatalk-cdn.com/20190927/a788aed1b6330703e6923fd14275c10e.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 27, 2019, 04:32:50 PM
Exhaust all finished now.
Now got to wait for the toyosport manifold to snap(https://uploads.tapatalk-cdn.com/20190927/ff5dd7bea896d75c7f7ea4b7da2a532a.jpg)(https://uploads.tapatalk-cdn.com/20190927/599d90e932263159a28d5ff54b70f79b.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 29, 2019, 12:30:16 PM
Quote from: boosted on March 30, 2019, 06:33:05 PM
Prior point i raised early cars didnt have the code for ssv failure to operate which was why i took an age to find my issue...i swapped ecu popped a code a fix in 20 mins.I run this early ecu as its been mapped for 1100rpm.
I have a spare ecu set with immobilser and key that defo has the ssv software onit ...happy to send to you to try?
Looks like you have the switch but not the software for it in the ecu...

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Boosted, do you know what year the software was included?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 29, 2019, 01:40:18 PM
All i know is early cars...cant remember who told me...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 29, 2019, 09:19:31 PM
Annoyingly despite re doing all of the earths I'm still getting the misfire at 4.5k and 6k. Now I started to monitor the voltage and vacuum (pressure) whilst driving.

Voltage is pretty much a steady 14.1-4 v throughout. Although I remember seeing 10v the other week on the pcm feed?!

And the vacuum is a bit of a strange one in my eyes....
It is negative (vacuum) under light accelation and cruising, however if I accelerate hard it goes into positive figures i.e boost.
Now being a naturally aspirated engine, it should always be vacuum?!

I'm wondering if the vacuum chamber is emptying itself and that is what is causing my misfire at 4.5k as the solenoid is struggling to switch.

Help!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on September 29, 2019, 09:21:03 PM
Sounds bizarre!

I wish I could help bud


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 30, 2019, 08:47:05 AM
Well done. the tail pipes are just right, any shorter and it would have droned in the cab. Racing Beat make three different length tail pipes because of this.

The SSV problem was a mechanical thing as the valve used to get carboned up, so I'm guessing you know that that's free to move OK     
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 30, 2019, 08:59:57 AM
Been staring at the vac lines diagram are struggling to see where the positive pressure  can come from..
If you pull off the vac pipe feeding the vac chamber at the vac chamber should hear a psst noise as air rushes in equalise pressure. If no noise then there is a leak...are you sure the check valve is in the right way round? As vac opposite to what you think...flow from vac chamber to Uim.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 30, 2019, 05:08:44 PM
Just a thought. Where is the vac sensor?! Or is this figure predicted by the ecu?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 30, 2019, 05:10:01 PM
Quote from: clive on September 30, 2019, 08:47:05 AM
Well done. the tail pipes are just right, any shorter and it would have droned in the cab. Racing Beat make three different length tail pipes because of this.

The SSV problem was a mechanical thing as the valve used to get carboned up, so I'm guessing you know that that's free to move OK   
SSV moved fine when I checked. The actuator took a lot more vacuum to move than the vdi actuator

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 30, 2019, 05:10:16 PM
No vac sensor Paul...i was wondering how your monitoring this pressure in the vac chamber?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 30, 2019, 05:11:59 PM
Quote from: boosted on September 30, 2019, 05:10:16 PM
No vac sensor Paul...i was wondering how your monitoring this pressure in the vac chamber?

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I was using torque Pro...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 30, 2019, 06:54:00 PM
Had no dealings with tech pro or mazda edit
..but there defo isnt a vac sensor...
If the vac chamber is holding vacuum when the car is off...then no leak.
I pulled the plug off and used 12v of the jump pack to fire my ssv with the stored vacuum.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 30, 2019, 06:59:31 PM
Must be theoretical pressure.

I checked all of the vac lines previously. All seemed OK... Definitely worse when hot. Need to double check connections(https://uploads.tapatalk-cdn.com/20190930/53ba85d3f8263f23bcd890620bf2e020.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 30, 2019, 07:09:35 PM
Maf sensors calculations?..

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 30, 2019, 07:10:31 PM
Maybe. Not thought of that.


*off to look at wiring diagram *
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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 30, 2019, 07:39:22 PM
Phil bate answered it. Calculated from engine load

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on September 30, 2019, 08:05:56 PM
Ok...its gonna be something simple...just blimin finding it...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 05, 2019, 03:30:41 PM
I got a replacement SSV Actuator and vac lines from bigpete on rx8oc.
The old actuator was a bit slow to respond so see if that eliminates that issue. I've got a spare solenoid if not.

I'm trying to come up with a way of keeping a bit of heat away from the solenoids. I might make a heat deflector plate which will shield them from the direct engine heat.

The vac tank is holding pressure :)

The next thing I might look at is the breathing mod which will do away with the catch tank. The oil filler tower is directly linked to the inlet manifold bungs/nipples

Fitted a replacement rear o2 sensor, hopefully will fix the heater failure fault code.

I've raised the rear by 15mm so the exhaust doesn't scrape so bad (https://uploads.tapatalk-cdn.com/20191005/5dae83bded8c8135991ce775ba951837.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 08, 2019, 11:51:57 AM
Next job. Oil pressure and temp(https://uploads.tapatalk-cdn.com/20191008/f67eaeb16e211157d71044814b45fa22.jpg)(https://uploads.tapatalk-cdn.com/20191008/e841a4bf26199d1a285e5a3ef5bafa3b.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on October 08, 2019, 08:10:53 PM
Looks a nice bit of kit
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 08, 2019, 08:20:23 PM
Cheap ass amazon crap :D

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 12, 2019, 04:45:46 PM
1 gauge installed. Fiddly as f(https://uploads.tapatalk-cdn.com/20191012/71f4d24e4554b46f042447d5c1655399.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on October 12, 2019, 04:50:49 PM
lol, you gotta allot of fuel in the tank :13: very un rotary that!!! :))
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 12, 2019, 04:53:09 PM
Ha. Thirsty beast this.
I think because I linked the 2 sender wires, the fuel tank reading is roughly right. It never reaches 100% full on the ecu strangely. Maxes put at 92%.

As soon as the gauge passes 3/4 it drains rapidly

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on October 12, 2019, 04:59:48 PM
yep....you need to try a 25l tank.... :-[
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 13, 2019, 06:57:53 PM
All done and wired up.
Got 1.5 bar at idle which seems OK. I've dropped the idle back to standard from 1k.

(https://uploads.tapatalk-cdn.com/20191013/588f21073540861f079893b41aea1d04.jpg)(https://uploads.tapatalk-cdn.com/20191013/70c69a3551ecb5c6ba3c1b0c7c503516.jpg)(https://uploads.tapatalk-cdn.com/20191013/c779102ad6ddba348b32516f37344624.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on October 13, 2019, 06:59:28 PM
Looks great Paul

Makes a change to look at something good instead of filler !


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 13, 2019, 07:00:15 PM
Haha. Dread to think what the inside of your lungs look like.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on October 13, 2019, 07:00:50 PM
I gotta die of summat


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 14, 2019, 05:09:58 PM
Today's job

Quite surprised to see that there was no outer metal sleeve on the OE bushes(https://uploads.tapatalk-cdn.com/20191014/c43159508d19cb24046d927ed32539de.jpg)(https://uploads.tapatalk-cdn.com/20191014/8e2e9aad9d6e9ab1ae003c44fbcca4f9.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 27, 2019, 06:04:36 PM
Found why it was flat above 7.5k...

Thanks to a chap on rx8oc I now have the updated oil filler tower with 2 breathers, bit of a bonus that turning up(https://uploads.tapatalk-cdn.com/20191027/fb3e4842acbe638b258984dbc4fa632a.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on October 27, 2019, 06:09:05 PM
Happy days


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on October 27, 2019, 06:35:52 PM
Just check that idle oil pressure when oil at 80deg c and above. Pressure drops as it warms and thins.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on October 27, 2019, 06:52:26 PM
Sits at about 1.5 bar when warm

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on October 27, 2019, 06:55:12 PM
Brill... i seen 9psi on old engine idling after hot track session..hence now a 1100 rpm idle...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 15, 2019, 12:20:05 PM
Think I found the reason why the dsc was kicking in unannounced. The passenger side sensor was slightly further away from the abs ring than the drivers. Closed the gap up now and see how it goes(https://uploads.tapatalk-cdn.com/20191215/7abbbf25d22eba992dd2195642a77e51.jpg)(https://uploads.tapatalk-cdn.com/20191215/d04d71b5706c044c87fb8a603f34e8fe.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 25, 2020, 06:50:16 PM
I fitted a dB reducer from jetex into the mid pipe. Despite all the naysayers - it has worked nicely and reduced the mid /low range drone. I've got a proprietary joiner to install. (https://uploads.tapatalk-cdn.com/20200125/b81c0a81c206d5a6660f91f98e6a09c0.jpg)(https://uploads.tapatalk-cdn.com/20200125/6bd74d333a539991d1a2844b917a6194.jpg)(https://uploads.tapatalk-cdn.com/20200125/50acad73a0d379d2a4e93938c89de138.jpg)(https://uploads.tapatalk-cdn.com/20200125/332a9f402d9f56fc5c186f575153bd72.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 25, 2020, 06:51:11 PM
Good news, the fire ring I used on the toyosport manifold sealed perfectly. (https://uploads.tapatalk-cdn.com/20200125/7b9b90379f7ba0d81fe6ec23711e7a97.jpg)(https://uploads.tapatalk-cdn.com/20200125/fda8bfa28f261519fb2fcb249b4aaaba.jpg)(https://uploads.tapatalk-cdn.com/20200125/443070bcda1d894c6ddb6c70e023f85e.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on January 26, 2020, 06:00:19 AM
Its all panning out quite nicely


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on January 27, 2020, 05:16:23 PM
When you installed the steering rack did it fit straight up to the mx5 hubs?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 27, 2020, 09:54:25 PM
It should bolt straight up yes. I used the rx8 hubs though due to the abs sensors
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on January 27, 2020, 10:37:06 PM
I will try get under the car tomorrow and get it bolted up, maybe my wheels aren't level as the rack seems wider

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 14, 2020, 09:50:17 PM
My job this weekend...

I think I tore the oe bushes when I freed off the camber bolts(https://uploads.tapatalk-cdn.com/20200214/100b88e7c899917050e8c8c6da79ee95.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on February 15, 2020, 05:53:26 AM
Morning Paul. Good to see you’re alive!

Thought everyone had died this week.

Btw? Flip flops with socks? Wtf??? Are you an alien ???
Pushin socks further between ya toes !!!

Summat Germanic about that


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 15, 2020, 07:17:49 AM
Argh I didn't crop that out.
No one was meant to see that
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on February 15, 2020, 07:18:38 AM
Mate my attention to detail is second to none lol


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on February 17, 2020, 06:41:05 PM
 :)) I can't unsee that now  ;)

Nice bushes though  :icon_thumleft:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 20, 2020, 09:38:37 PM
All bushes are now in. Wasn't too bad of a job, trying to fabricate a press tool was probably the hardest bit.
Managed to slip a pair of spanners and whacked myself in the face with them. Some how managed to pop the lense out of my glasses, luckily they've gone back together!
Test drive to work tomorrow morning. Will be interesting to see if the DSC kicks in like before when turning a corner normally in(https://uploads.tapatalk-cdn.com/20200220/4e61f325c32c1fe0c4b6b7aa4625ec25.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 21, 2020, 06:23:40 AM
Fingers x sorted the dsc issue.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 21, 2020, 07:14:33 AM
Still doing it. Oh well. Need to get tracking done again.
Need to get a DA polisher as I've majorly f*cked the paint work on this car. My mate Greig has given me some swirl remover which I need to start chipping away at.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 21, 2020, 08:16:12 AM
I know youve checked all readings on mazda edit etc..is it worth pulling abs and dsc fuses...so system is off and trying to rule out a mechanical problem and confirm dsc is cutting in...ive had it on a rx8 with cheapo tyres its not very nice.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 21, 2020, 01:40:25 PM
100% dsc. If I turn dsc off, problem fixed
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 21, 2020, 02:48:58 PM
Is there any pid tables in mazda edit you can manipulate?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 21, 2020, 05:19:12 PM
Quote from: boosted on February 21, 2020, 02:48:58 PM
Is there any pid tables in mazda edit you can manipulate?

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Unfortunately not...
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 21, 2020, 05:59:55 PM
Im just wondering whether a calibration issue..ie. set up for rx8 not mx5. Longer wheelbase but would think similar handling...if you could get to the pid tune it out a bit...
Could moving the yaw sensor do this ? I would think centre line of rear axle to its position compare the 2 readings mx5 and rx8? Mx5 gonna be shorter so bigger yaw rate value? ( maybe centre line of front axle).
Maybe just maybe moving forward has desired effect...
Id be interested to see measurements of a rx8 and if its smack bang in middle of axles and yours is more rear biased?
Maybe a load of codswallop but worth getting the tape measure out? And move it?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 21, 2020, 07:08:53 PM
The mx5 is 400mm shorter than rx8. I can't find anything on the mounting point  (rx8).

I have been looking at different as built data for the dsc. I'm wondering if I flash the dsc module with mx5 settings or may solve it(https://uploads.tapatalk-cdn.com/20200221/685124335c9c6f8c93fe13c2bf7067cb.jpg)(https://uploads.tapatalk-cdn.com/20200221/9319b935289ee0b886155ca2b884ab25.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 21, 2020, 07:25:44 PM
Ive do some background reading and the yaw sensor is usually positioned in the cars centre of gravity? I sorted understand that  which to me would be smack bang middle of car and the middle lengthways between the axles....but if not then clever data and pid tuning...
If you can download the mx5 data its defo worth ago.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 21, 2020, 07:29:22 PM
I can work out the vin by using the method in the pic. I'll look in the service manual and check the dsc units are the same and then use forscan to change as built data(https://uploads.tapatalk-cdn.com/20200221/74b1f0672bf068ea7e06a7f12c791367.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 21, 2020, 07:34:13 PM
Cool. Fingers crossed.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 21, 2020, 07:44:17 PM
Or rewrite the as built with one of the other configurations in the pic and see where that gets me(https://uploads.tapatalk-cdn.com/20200221/2f0cd1b091c9d406996f67f04d154924.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 21, 2020, 08:01:08 PM
Brill...so load with mx5 data then?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 21, 2020, 08:05:17 PM
That's rx8 data. Need to work out a suitable mx5 vin and pull the as built off mazda website. Then compare codes line by line
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Mr Spiller on February 21, 2020, 08:54:50 PM
I havnt read your  full thread yet . Can I ask , how far have you ran it after the dsc is kicking in ?
It may be insignificant , but I done a track day at castle Combe and my near side camber bolt had seized . Near side toe was -5 OS was -2. So all to hell
On the sighting lap the dsc was kicking in badly
I came back in
Done the second round of sighting laps it was a bit better
After 2 other easy 3 laps it righted it self so I guess the computer done something  and was great for the day
Mine is an RX8 so not sure if it’s the same
Just a thought


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 21, 2020, 09:39:48 PM
I have contemplated whether it's the tracking. When they did it last, I wasn't too certain he was doing it right. I need to go back to wheels in motion and for the guy who runs it this time
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: re japi on February 22, 2020, 07:26:56 AM
Dutch grazy scientist Kees Hoebeke made similar swap to his Miata. I reckon he might know the answer to your dilema...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 22, 2020, 07:43:32 AM
:((https://uploads.tapatalk-cdn.com/20200222/d9ba1c993a63729a360e75ac205bc58e.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 22, 2020, 07:44:00 AM
Quote from: re japi on February 22, 2020, 07:26:56 AM
Dutch grazy scientist Kees Hoebeke made similar swap to his Miata. I reckon he might know the answer to your dilema...

Lähetetty minun G8141 laitteesta Tapatalkilla
I think he used the mx5 dsc/abs pump. Something I should of done
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Mr Spiller on February 22, 2020, 09:40:48 AM
Quote from: Paul_13 on February 21, 2020, 09:39:48 PM
I have contemplated whether it's the tracking. When they did it last, I wasn't too certain he was doing it right. I need to go back to wheels in motion and for the guy who runs it this time
Easy enough to check with string line and spirt level to see if all sides are equal .
Have you driven it loads and got the dsc kicking in multiple times to see if it could right itself ?
Has this always happened or just since you changed the rear bushes ?


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 22, 2020, 09:38:25 PM
Quote from: Mr Spiller on February 22, 2020, 09:40:48 AM
Quote from: Paul_13 on February 21, 2020, 09:39:48 PM
I have contemplated whether it's the tracking. When they did it last, I wasn't too certain he was doing it right. I need to go back to wheels in motion and for the guy who runs it this time
Easy enough to check with string line and spirt level to see if all sides are equal .
Have you driven it loads and got the dsc kicking in multiple times to see if it could right itself ?
Has this always happened or just since you changed the rear bushes ?


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It's only happened since putting the rx8 dsc system into the mx5.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 23, 2020, 04:05:07 PM
Question for Jamie. R I've bought one of these. What's the best way to stick it on(https://uploads.tapatalk-cdn.com/20200223/c385e6b225bdba7793ad84a7ab96c91c.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on February 23, 2020, 04:10:06 PM
Upol tiger seal imo.
Used it to put a sim spoiler on an rx8...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on February 23, 2020, 04:16:46 PM
Ah, i cheated a bit as i made my own and moulded in my own captive bobbins / lotocones through holes i already drilled in the bootlid.

Are there any provisions for a mechanical fixing?

If not try chemical adhesion as jon recomended just get it in the right place.

Another option is VHB tape by 3M.....we use it at work. its like double sides sticky tape, but its immensley strong, they used it to mount some double glazing to a hotel in Saudi about 20 years ago
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 23, 2020, 06:46:55 PM
Thanks for the tips. Might go for the 3m stuff. Will be easier to remove in the long run
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on February 23, 2020, 06:59:32 PM
Line it all up coz once it’s on it’s on.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 28, 2020, 08:36:23 PM
Need to clean the car next(https://uploads.tapatalk-cdn.com/20200228/c3e1d4704aa8d54a5b9ba7c5f04fe233.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on February 28, 2020, 08:43:18 PM
Did it come with any  cleaning wipes ?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 28, 2020, 10:06:30 PM
Nope
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 29, 2020, 02:28:52 PM
Tracking booked in for next weekend at wheels in motion
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 29, 2020, 08:25:31 PM
What would you recommend cleaning the paintwork with before sticking the adhesive tape on?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 29, 2020, 08:27:36 PM
Forgot it was white! (https://uploads.tapatalk-cdn.com/20200229/c2fc237605cbac59fe06f71387d98b24.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on February 29, 2020, 09:18:07 PM
No idea, as long as it's dust free without any residue from cleaning it should be fine

One of the kids toilet wipes lol
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 06, 2020, 02:50:00 PM
4.1 diff ordered :) need to swap lsd unit over
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 09, 2020, 06:52:24 PM
Managed the polish the car yesterday in an attempt to get rid of done off the holograms/paint damage. Didn't come up to back. Bonnet is the worst bit.

Not happy with the alloy, the paint looks like it's reacted
(https://uploads.tapatalk-cdn.com/20200309/2f8afbca4578ec29d6f2cb79fbbe46d5.jpg)(https://uploads.tapatalk-cdn.com/20200309/a9fad825051ac5d5fd5c7820735a612e.jpg)(https://uploads.tapatalk-cdn.com/20200309/51a3e564d0f836c19b60993d80773267.jpg)(https://uploads.tapatalk-cdn.com/20200309/e6ad09f155f0554826219957064038c6.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 10, 2020, 07:10:02 AM
Has any one vinyl wrapped anything before? I've got black vinyl for the door mirrors to go with the spoiler.
I don't want to paint at the mirrors are limited edition colour. Also the cosy of second hand mirrors is extortionate. Everything body wise on an NC is a fortune and hard to find
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 10, 2020, 07:11:27 AM
Also been looking at front splitters.
Shane they don't seem these in UK. It's about £160 delivered(https://uploads.tapatalk-cdn.com/20200310/2e8d653a286449384dd9ad6c7750c9dc.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 10, 2020, 03:23:05 PM
Never wrapped anything

My mate has n it looks ok,

Prefer paint


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 10, 2020, 04:41:32 PM
Ive tried wrapping..full of bubbles and creasing lol...i spent hours trying to perfect it...all the tools heat gun...need lots of patients and tobe an octopuss.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 10, 2020, 10:05:24 PM
Hmmm....
Might look for black mirrors
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 10, 2020, 10:05:40 PM
Got the diff out the box and it is 4.1 :)
(https://uploads.tapatalk-cdn.com/20200310/318e3520f3830543d3e42b6ca7e0a6d0.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 13, 2020, 10:20:36 PM
Diff progress.
Next job to get the diff out of the car out(https://uploads.tapatalk-cdn.com/20200313/ee4de5e6ede8907801b202607afd72a6.jpg)(https://uploads.tapatalk-cdn.com/20200313/f99e70b8d643ee4accf9b618f60cb19c.jpg)(https://uploads.tapatalk-cdn.com/20200313/e76e109e16a7be0758cf250edbcf3de6.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 14, 2020, 07:52:11 AM
Oooo oily oily


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 15, 2020, 08:58:46 PM
Diff swapped over. Luckily no adjustment needed!

Just got to get the rest of the paint off now(https://uploads.tapatalk-cdn.com/20200315/9c9faeb28b9d8aa3abefa6477226e8b1.jpg)(https://uploads.tapatalk-cdn.com/20200315/fe0a7c14f45471d4934123ee3c5826b1.jpg)(https://uploads.tapatalk-cdn.com/20200315/75d4cf3c396e754d223e4bb6a4fbc43a.jpg)(https://uploads.tapatalk-cdn.com/20200315/cf23b3caee2dfa12a5a15c8fba9f98be.jpg)(https://uploads.tapatalk-cdn.com/20200315/59ed605d4b7a60b47d1e3271a8585eaa.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on March 17, 2020, 04:00:41 PM
How did the paint get there  ???
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 17, 2020, 05:50:31 PM
Me. Checking the tooth engagement
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on March 17, 2020, 06:14:51 PM
 ;D Ah, now it makes sense.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 21, 2020, 08:10:50 AM
Goes well with the 4.1 diff. :) roads are deadly quiet at night with all this virus bollocks. Some sprinted driving took place last night
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 21, 2020, 08:20:22 AM
I bet!!! 4.7 in the rx8 1 i had in here...top speed 90mph lol...nah but it was rapid.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on March 21, 2020, 11:50:28 AM
Quote from: Paul_13 on March 21, 2020, 08:10:50 AM
Goes well with the 4.1 diff. :) roads are deadly quiet at night with all this virus bollocks. Some sprinted driving took place last night

Excellent - enjoy  :13:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on March 22, 2020, 07:14:47 PM
Paul, I saw your fuel pump  question over on RX8OC and if it were me, I would just give the pump a 12Volt feed and done with, the same as I had to when I had all the RX-8 wiring intact at the start of the race car project.

Also am I right in thinking that you fitted the RX-7 cwp in the MX-5 case, or did I miss somthing :-[       
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 22, 2020, 07:22:27 PM
Westy just ran 12v straight to pump too...no issues.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on March 22, 2020, 07:56:57 PM
I agree, just jumper the ballast resistor or dump it all together. I did this for a while when I was checking for a fuel starvation issue and it didn't cause any issues.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 25, 2020, 07:05:31 AM
Thanks guys. I'll look at doing a direct 12v feed, but will probably try the jumper first.
Seems a bit of a silly design really. When the high pressure relays kick in there's 3no relays supplying power at once from what I can work out. Fuel, circuit and EGI relays. Asking for trouble

It was a mx5 NC 4.1 crown wheel, not Rx7.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 29, 2020, 09:18:16 PM
Jumper wire made.
Next job is to figure how to utilise the old mx5 fuse board and create a new 12v relay feed(https://uploads.tapatalk-cdn.com/20200329/6b4df1a6973161e90a442b678cdc66b7.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 29, 2020, 09:22:21 PM
Annoyingly the spoiler started to lift off of the 3m adhesive tape.
I've got some fischer adhesive which should be up for the job. Tiger seal is polyurethane,so is this stuff. (https://uploads.tapatalk-cdn.com/20200329/5c59e1af6fce20334161a6d2147b35f0.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 29, 2020, 09:41:27 PM
Quote from: Paul_13 on March 29, 2020, 09:22:21 PM
Annoyingly the spoiler started to lift off of the 3m adhesive tape.
I've got some fischer adhesive which should be up for the job. Tiger seal is polyurethane,so is this stuff. (https://uploads.tapatalk-cdn.com/20200329/5c59e1af6fce20334161a6d2147b35f0.jpg)
Wtf ? I am very surprised


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 29, 2020, 09:42:02 PM
I thought it will pull the paint off the car first


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 29, 2020, 09:58:32 PM
Unless it's counterfeit stuff,I'm not impressed. To be fair, the spoiler isn't the easiest surface to grab on to. The spoiler has a recess of 3-4mm where the 3m tape is applied. The edge of the spoiler is curled over.
Sorry probably not making much sense, had quite  a lot of spiced rum. I tried to give up drinking but this current situation is driving me crazy. (https://uploads.tapatalk-cdn.com/20200329/05a489853c0b0205288010037c817b0a.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 29, 2020, 09:59:46 PM
Double it up ? I dunno


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 29, 2020, 10:00:04 PM
... (https://uploads.tapatalk-cdn.com/20200329/14d4350bd17358a6333af33026cdfa44.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 29, 2020, 10:01:35 PM
Run out now unfortunately. Either order thicker stuff or bond it. I can't pull the spoiler off the section which has stuck down
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on March 30, 2020, 09:52:29 AM
Tiger seal  :great: :great: :great:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 30, 2020, 06:58:00 PM
Quote from: Paul_13 on March 29, 2020, 10:01:35 PM
Run out now unfortunately. Either order thicker stuff or bond it. I can't pull the spoiler off the section which has stuck down

You mean its stuck firm?

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2020, 06:58:58 PM
The part above the number plate yes
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 30, 2020, 07:04:20 PM
I mean it grips well. We use it at work,

Maybe 1 layer was just not thick enough for that application.

Feeling bad

One way or tother ya gotta get it bonded


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2020, 09:46:35 PM
Got it off. (https://uploads.tapatalk-cdn.com/20200330/6df89298d56937d5ac1de0e203dbcfb3.jpg)(https://uploads.tapatalk-cdn.com/20200330/44e44e19f14cc845a41d201250ab840c.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2020, 10:04:29 PM
Going to order 2 thicknesses. Same as before for vertical and twice as thick for horizontal
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 30, 2020, 10:12:08 PM
Fingers crossed

The best advice I can give with this is make sure your surfaces are clean prior to sticking




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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2020, 10:13:14 PM
Cheers. They were. Made sure of that.
Have you got a link to the stuff you use? Make sure I'm getting the right stuff
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 30, 2020, 10:29:08 PM
If you can wait till I get to work tomoz I'll email the purchasing dept at work n found out.

I know you can't buy from 3m direct, but from one of their distributors

https://www.amazon.co.uk/dp/B07TC16SZ7/ref=sspa_dk_detail_0?psc=1&pd_rd_i=B07TC16SZ7&pd_rd_w=PnTY8&pf_rd_p=1055d8b2-c10c-4d7d-b50d-96300553e15d&pd_rd_wg=PyASa&pf_rd_r=832VM5XAHSWKQHV61PDJ&pd_rd_r=627799e2-bf40-44bd-b0bb-9749eaa6377a&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzS0kxOVdUTE41WkhUJmVuY3J5cHRlZElkPUEwNTM5ODk2M1E2NU5VMjk5WjhJRiZlbmNyeXB0ZWRBZElkPUEwMjEzODc5MUtHSEVDNjRZMk9EMyZ3aWRnZXROYW1lPXNwX2RldGFpbCZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

I know the stuff we use is dark grey in colour with a red tear off backing.

Lemme know how much you need too 👍👍
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 30, 2020, 10:34:23 PM
I wonder if I bought counterfeit stuff. It was clear in colour
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 31, 2020, 09:19:19 AM
(https://uploads.tapatalk-cdn.com/20200331/3836a2b3dfe3bdd31b664cb5ba6a9d83.jpg)

All sorted..... proper stuff !


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 31, 2020, 09:23:34 AM
Good man thanks again
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 31, 2020, 09:02:03 PM
Can someone give me some electrical help please. Would the below work for a "direct" 12v feed to the pump?
I daren't ask on rx8 oc as they are a bit finicky about stuff like this(https://uploads.tapatalk-cdn.com/20200331/74d8726f9ed4d9d17396fdcf2fc0d128.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on March 31, 2020, 09:08:32 PM
3m tape will fix it lolllll


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 31, 2020, 09:10:28 PM
Trollololol
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on March 31, 2020, 09:22:03 PM
Yep no worries at all.

But i may have mentioned it b4 fuel pressure tester? Lol



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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 31, 2020, 09:39:11 PM
That reminds me I need to reorder the pressure gauge. I ordered one but for some reason the order didn't go through
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on March 31, 2020, 09:40:45 PM
I don't think it's pressure related though. It's the electrical supply to the pump. It was randomly cutting out like the relay was failing. It's better with the fuel pump resistor removed and bridged.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on March 31, 2020, 10:09:51 PM
I would suggest you just leave the relay bridge in place. It has the same result as your planned rewiring, but means you can leave everything in place and easily return to OEM setup in future.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 01, 2020, 07:33:01 PM
For a test just bridge the relay...or maybe you have lose connection within the fusebox from conversion ..little clips it lifts out... can check the connections underneath.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 02, 2020, 05:49:00 PM
All received thanks
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 02, 2020, 06:15:00 PM
No stress Paul.

I’d very disappointed if it doesn’t work out for you, we have great success with it at work .


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 02, 2020, 06:17:13 PM
How would you prep the spoiler?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 02, 2020, 06:23:30 PM
Is is smooth ?

If so just like an alcohol wipe will suffice.

The blokes on the shop floor don’t bother. They stick acrylic sheet onto galvanised steel and that can be rough and lumpy. It’s quite forgiving. Just make sure you compress it enough to ensure maximum adhesion.

They do in fairness use a little roller but I can imagine that could be difficult for your application.

Just try and make sure it compresses enough before the spoiler bottoms out on the bodywork if that makes sense


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on April 02, 2020, 08:50:10 PM
There's only two plugs on the back of the dash and I think these are the ones in your hand.

Race cars 10miles away so I cant check either  ;) 
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 02, 2020, 09:30:45 PM
Yep 2 plugs ..lh passenger side canbus power neutral etc rh drivers side plug fuel sender.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 02, 2020, 09:33:41 PM
Is this the right convo?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on April 02, 2020, 09:36:12 PM
Lol...i was reply to Clives comment...
So noty my fault

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 05, 2020, 06:21:26 PM
Spoiler on. That felt a lot more positive to stick on this time. Cheers Jamie (https://uploads.tapatalk-cdn.com/20200405/d8243f69199b33f13d481fe0df30e667.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 05, 2020, 06:26:28 PM
Welcome


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 05, 2020, 06:27:41 PM
Some scrote has tagged/scratched something into my bonnet. Not sure if it's a neighbour or is been done when I've been parked up somewhere. Luckily it's not too noticeable.

Started to get through the jobs which have been on my list for a while.

-finish swapping the fuel hose over
-DSC pump
-brakes front
-spray the fog light surrounds black
-sort fuel pump

Just on the fuel hose. The stuff that halfords sells and numerous other online merchants is not fit for purpose.
This hose was purchased 3 months ago from advancedfuelsolutions(?) and its already perished. Same stuff that halfords sell.

I bought some replacement hose from Merlins and it seems to be spot on(https://uploads.tapatalk-cdn.com/20200405/0afc971192e598eb122246084ea4cf6d.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 05, 2020, 07:24:03 PM
Then stop using it as a whip you kinky boy !


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 10, 2020, 06:29:08 PM
Been tinting a few bits. Really impressed with this stuff. Shame I messed up the NS rear light. It doesn't come off with white spirit annoyingly (https://uploads.tapatalk-cdn.com/20200410/ad3beb30ef0d4e0296c34d616d67dd74.jpg)(https://uploads.tapatalk-cdn.com/20200410/ade96f7ea9df56667af617c368ea5b2b.jpg)(https://uploads.tapatalk-cdn.com/20200410/ccaf7479743131d902db3989da0f8061.jpg)(https://uploads.tapatalk-cdn.com/20200410/e4eb1fefa8e1a27fc0dc4daa7f4e0fec.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 10, 2020, 06:30:15 PM
I completely overlooked the indicator colour. It flashes red instead of orange. Apparently changing/painting the bulbs green fixes the issue!
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 18, 2020, 08:04:34 PM
I ended up stripping the bodged tint off this evening. Comparison photo for you(https://uploads.tapatalk-cdn.com/20200418/dc25c79e1e5dd6805471fb125ca5ac11.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 18, 2020, 08:04:52 PM
And yes the green bulb fixed the issue
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on April 19, 2020, 08:38:22 AM
Looks better without the tint on a white car! They come up like new too!
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on April 19, 2020, 09:42:01 AM
That looks good and much more modern :great:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 19, 2020, 09:50:37 AM
I prefer the red Tint
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 19, 2020, 09:16:59 PM
keep getting a code pop up on the abs module. B1318 - battery voltage is too low.
It gets its feed straight from the fuse and ignition switch.

Any ideas? Is it a known fault?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 19, 2020, 09:26:47 PM
That might explain a few issues! (https://uploads.tapatalk-cdn.com/20200419/61df7796efd432ab62e4f9946fd9c145.jpg)(https://uploads.tapatalk-cdn.com/20200419/376fe85d397332cf9bd9ef3f8da5ea87.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 20, 2020, 07:16:38 AM
What’s wrong with the maf?


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 20, 2020, 07:22:46 AM
O ring split. Might explain a few issues I was having
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 20, 2020, 08:36:27 AM
Ahh I see it now I zoomed in.

No, it’s not ideal


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 22, 2020, 06:59:32 PM
Got the Ramair filter through. Hopefully might make the car a bit quieter compared to k&n(https://uploads.tapatalk-cdn.com/20200422/1c039d6c5754e76cdf5e88f7e4f74733.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 23, 2020, 09:14:19 PM
I've reinstated the throttle bypass for fault finding. Hopefully I don't have the momentary power loss anymore, maybe the throttle body is at fault.
Running out of things to do on the car to keep me busy. I've ordered a mx5 ARB to swap out for the rx8 item which will hopefully cure understeer.
Then just sit at home drinking lots of rum bored out of my head! Going crazy at the moment
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 23, 2020, 09:15:11 PM
I've also put a sleeve over the ssv stop post to try and stop the car chattering on idle so much
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on April 24, 2020, 08:56:37 AM
Quote from: Paul_13 on April 23, 2020, 09:15:11 PM
I've also put a sleeve over the ssv stop post to try and stop the car chattering on idle so much

Paul, Have you pulled out the SSV, as they only normally chatter when they are carboned up and the noise is where they are struggling to work.   
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 24, 2020, 09:05:11 AM
Quote from: clive on April 24, 2020, 08:56:37 AM
Quote from: Paul_13 on April 23, 2020, 09:15:11 PM
I've also put a sleeve over the ssv stop post to try and stop the car chattering on idle so much

Paul, Have you pulled out the SSV, as they only normally chatter when they are carboned up and the noise is where they are struggling to work.
I haven't pulled it out, but it looks clean from the top with upper inlet manifold off and it operates freely. Extensively tested for fault finding
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 01, 2020, 10:16:28 PM
I've swapped the front anti roll bar to a mx5 item and it seems less inclined to understeer.
The dsc still kicks in unfortunately under right tights easily.
Going to swap out the dsc pump next. See what that does
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 05, 2020, 09:22:10 PM
Swapped the pump out and strangely a code has popped up which confirms my suspicions.
C1155 Front left speed sensor failure. Why this hasn't popped up before removing the abs pump I don't know.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 05, 2020, 10:03:36 PM
Fingers x that puts the dsc issue to bed.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 05, 2020, 10:04:57 PM
Are the abs rings built into the bearings on the front?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 05, 2020, 10:05:31 PM
Ive no idea mate.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 10, 2020, 07:35:54 PM
I ended up jacking up the front wheel with forscan connected and wiggled the abs cable whilst the wheel was spinning and there was no drop in signal
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Mr Spiller on May 11, 2020, 09:23:05 PM
Quote from: Paul_13 on May 10, 2020, 07:35:54 PM
I ended up jacking up the front wheel with forscan connected and wiggled the abs cable whilst the wheel was spinning and there was no drop in signal
I think it’s either 4 or 5 mph is when Is when the light normally triggers if there’s a fault
Can you move it and read it live ?


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 11, 2020, 10:32:16 PM
I have done previously and nothing was out of the ordinary
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 25, 2020, 10:36:37 AM
I've been having a few issues with jerky throttle and cutting out.
Double checked the earth onto the cross member and for some reason I had put copper slip on it and bolted straight onto paint. Serves me right for working on the car drunk when I did the conversion.
Drives like a complete different car now
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 25, 2020, 10:46:13 AM
Yay!!! I havent had a drink working on a car for about 10 years after i drilled through my hand...washing a car in early eve sun nice to have a beer though!
I was wrong on ppf earth..thats mk1s and 2s mx5s as battery in boot. Soz about that. (https://uploads.tapatalk-cdn.com/20200525/02f10bc5f0e7d0faabd89d7429a97c13.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 25, 2020, 12:55:16 PM
Ouch!

I was starting at the rx8 ppf last night and thinking where does the earth connect to. Glad I wasn't going mad (der)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on May 25, 2020, 12:58:30 PM
Soz got mixed up. Been working on a mk1 5 all day. And 1 job was cleaning its ppf earth point.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 01, 2020, 09:27:32 PM
Still getting lean AFR's at light throttle 5k ish revs.
Can someone measure the distance between the MAF screens please?
I'm wondering if I have them spaces too far apart.
Is rx8oc down? (https://uploads.tapatalk-cdn.com/20200601/c52d2a8b5fe205fa8bef1faebe7a0b64.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 13, 2020, 10:32:29 AM
Ended up getting a rx8 air box and in the middle of putting it in.
Unfortunately to get the rx8 airbox to fit, I needed to refit the mx5 fuse box.
Lots of silent sobbing going on in my head at the moment. One of those jobs you wish you didn't start(https://uploads.tapatalk-cdn.com/20200613/9d147a3e2b64e06ba38f00aad6497449.jpg)(https://uploads.tapatalk-cdn.com/20200613/cd5eda14af60821b2680182ea9d260f8.jpg)(https://uploads.tapatalk-cdn.com/20200613/b9f40ca6ba6492073071e4610fe81307.jpg)(https://uploads.tapatalk-cdn.com/20200613/2f3f0fd2be5c8d9940085f1404ea511a.jpg)(https://uploads.tapatalk-cdn.com/20200613/fea12e2dc84a5d3a4483ac37f055f631.jpg)(https://uploads.tapatalk-cdn.com/20200613/b99da96d40537001c9c2b6c18ea42b50.jpg)(https://uploads.tapatalk-cdn.com/20200613/57ffae860d8f43e63d5cd9a4c1ee1959.jpg)(https://uploads.tapatalk-cdn.com/20200613/5c3b6da8b5e44fa4ae1a4cee2a0b091a.jpg)(https://uploads.tapatalk-cdn.com/20200613/1fd1357ca7562d968af2955f4cb4eec1.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on June 13, 2020, 11:23:25 AM
I would have rather modified the air box than mess with the rats nest of wiring

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Orange rx7 on June 15, 2020, 12:59:06 PM
That will keep you busy till xmas good luck


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 20, 2020, 06:36:37 PM
Any news Paul? Big job but worth it! I was delighted when Westy and Clives started  first go after chop chop of looms.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 20, 2020, 06:48:21 PM
I have 1 more relay to swap over. That's the starter relay. Unfortunately it's bigger than that the mx5 item so need to create a relay holder.

The ignition IG fuse 40A caused a bit of confusion. The mx5 setup doesn't have this fuse

All the rest is done. Next job is to reroute the wiring so it fits into the fuse box
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 20, 2020, 06:54:44 PM
Cool! Fingers crossed.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 20, 2020, 08:29:42 PM
Last few to go(https://uploads.tapatalk-cdn.com/20200620/aee4a4175876ef8548fe2144a1b7f7d9.jpg)(https://uploads.tapatalk-cdn.com/20200620/5a3916ef76ef9f39a8da35dbfe00beb8.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Mr Spiller on June 20, 2020, 09:25:16 PM
Good job that
I wouldn’t have a bloody clue


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 20, 2020, 10:03:19 PM
That's the rx8 fuse boards out.
Now just to tie up a few loose ends and tidy up all the wiring(https://uploads.tapatalk-cdn.com/20200620/5652b4787979a5335cb13fbcf7edebef.jpg)(https://uploads.tapatalk-cdn.com/20200620/19e94e3d31416be70ce8709487f76dd1.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 21, 2020, 06:35:36 PM
More progress. Fuse box swapped over. Just got to sort the slack on the cables. Hopefully have that sorted tonight(https://uploads.tapatalk-cdn.com/20200621/be9ba0815924aa7fb18e2fc71d544090.jpg)(https://uploads.tapatalk-cdn.com/20200621/c7fd0cb9f6ed68612d7b27bf89ecc764.jpg)(https://uploads.tapatalk-cdn.com/20200621/ddbeba7310e1d412d96dbb2dc031b32a.jpg)(https://uploads.tapatalk-cdn.com/20200621/a9e3ea4cd397055d9f112f7ebb541546.jpg)(https://uploads.tapatalk-cdn.com/20200621/407877687c7c1a84c22f5051afb75cd9.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 21, 2020, 07:31:15 PM
Quote from: Paul_13 on June 21, 2020, 06:35:36 PM
More progress. Fuse box swapped over. Just got to sort the slack on the cables. Hopefully have that sorted tonight(https://uploads.tapatalk-cdn.com/20200621/be9ba0815924aa7fb18e2fc71d544090.jpg)(https://uploads.tapatalk-cdn.com/20200621/c7fd0cb9f6ed68612d7b27bf89ecc764.jpg)(https://uploads.tapatalk-cdn.com/20200621/ddbeba7310e1d412d96dbb2dc031b32a.jpg)(https://uploads.tapatalk-cdn.com/20200621/a9e3ea4cd397055d9f112f7ebb541546.jpg)(https://uploads.tapatalk-cdn.com/20200621/407877687c7c1a84c22f5051afb75cd9.jpg)
I get cold shivers just looking at that


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 21, 2020, 10:22:41 PM
:D
That's better at least I can get some tape around it
(https://uploads.tapatalk-cdn.com/20200621/50cee118aa713d493ad5e477f4ade24e.jpg)(https://uploads.tapatalk-cdn.com/20200621/fee8b79885cad8d9570d836b88d02b87.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on June 22, 2020, 12:28:40 PM
Don't suppose you know the width between the chassis legs in the engine bay do you? I'm away at work for the week and trying to measure up for fitting a rad and fuel cell in there but forgot to. Measure  how much room I have available

Thanks

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 22, 2020, 12:52:37 PM
I'll give it a go later for you.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 22, 2020, 09:16:11 PM
665mm from lip to lip.
There's a 25mm over hang(https://uploads.tapatalk-cdn.com/20200622/0e961a8a2f17c5982a44678d1d93f63a.jpg)(https://uploads.tapatalk-cdn.com/20200622/a4671fbdf13ff6401d93d4025961fdcd.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 22, 2020, 09:17:06 PM
Had some winning tonight.
Hook the battery up to do some testing and everything works so far apart from the rear fog light(https://uploads.tapatalk-cdn.com/20200622/853bb41646185354cca0c90ca64b3020.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 22, 2020, 09:28:59 PM
Epic job! Welldone

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on June 22, 2020, 09:59:55 PM
Quote from: Paul_13 on June 22, 2020, 09:16:11 PM
665mm from lip to lip.
There's a 25mm over hang(https://uploads.tapatalk-cdn.com/20200622/0e961a8a2f17c5982a44678d1d93f63a.jpg)(https://uploads.tapatalk-cdn.com/20200622/a4671fbdf13ff6401d93d4025961fdcd.jpg)
Thank you. Think it's just wide enough to fit a fuel cell and rad in

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 22, 2020, 11:09:11 PM
Figured out the issue with the rear fog light. Had the fused 12v feed mixed up with the switching signal.
2 wires to swap over and it's sorted
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 23, 2020, 05:13:21 AM
Quote from: Paul_13 on June 22, 2020, 11:09:11 PM
Figured out the issue with the rear fog light. Had the fused 12v feed mixed up with the switching signal.
2 wires to swap over and it's sorted
You’re a clever cookie

Nice one bud


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 23, 2020, 10:09:55 PM
:D
Tonight has been a night of testing.
Plugged the battery in, ECU and PAS ECU.

Fired up Forscan and carried out a Key on engine off test. Ended up getting a fault on cooling fan 1.

Double checked the relay socket and found the switching wiring terminal loose. Popped it back in the socket and all is well.

Got the rear fog light wiring as well. That was a combination of getting wiring terminals mixed up + a dodgy fuse board terminal.


(https://uploads.tapatalk-cdn.com/20200623/7dfe32597c0d1d65a176f7d71a11032c.jpg)(https://uploads.tapatalk-cdn.com/20200623/78d7907452a94ca1cb0b6d031f80f060.jpg)(https://uploads.tapatalk-cdn.com/20200623/bc3d29af16f36f52d6a2e36f4482cb3c.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 24, 2020, 11:10:37 PM
That's the wiring tidied up and lower air box tray mounted. Just need to jiggle all of the mechanical bits to fit(https://uploads.tapatalk-cdn.com/20200624/93cc29a6c43f9e0a6007b0bb62151eac.jpg)(https://uploads.tapatalk-cdn.com/20200624/d34e7522aa761488146e949230f33b52.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on June 24, 2020, 11:17:47 PM
10/10


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 25, 2020, 10:27:49 PM
Airbox tray mounted. Now to squeeze in the battery(https://uploads.tapatalk-cdn.com/20200625/45794a7b9890f477ef633696074004c1.jpg)(https://uploads.tapatalk-cdn.com/20200625/833dc732286a93244fb715266788f0bd.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on June 26, 2020, 06:54:37 AM
Yep, thats a squeeze
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 27, 2020, 10:06:18 PM
I ended up getting some draft seal strips from screw fix which will do the job.

Made good progress tonight and then got rained off 

ECU box is now mounted. I've trimmed down the battery box and it JUST fits.
Started to apply the tape to the radiator and that's when the heavens opened.


(https://uploads.tapatalk-cdn.com/20200627/12eb68dee2ed9b61fc830ac7ac9b4c61.jpg)(https://uploads.tapatalk-cdn.com/20200627/9658c89efe3382033f5755c9ca8b4907.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on June 27, 2020, 10:11:22 PM
Great progress..the end is nigh!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 27, 2020, 10:15:02 PM
Quote from: boosted on June 27, 2020, 10:11:22 PM
Great progress..the end is nigh!

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Yep. Next step is to fabricate a battery tray mount and fit battery. After that is for air box and undertray. Job done
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 30, 2020, 12:10:22 AM
Battery mounted. Nearly there(https://uploads.tapatalk-cdn.com/20200629/eb47966f860229662d2dd06b9a646911.jpg)(https://uploads.tapatalk-cdn.com/20200629/9ac5c495b16d14a2d55724b95b189eec.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on June 30, 2020, 08:47:09 PM
Amazing to get that all to fit - looks very neat too - well done Paul  :icon_thumleft:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 30, 2020, 11:07:18 PM
Tighter than a nun's c u next tuesday.
No idea how I'm going to get that acordian pipe on. Need to shave a bit off the VFAD mouth, it clashes with the bumper. Should have it back on 4 wheels tomorrow
Expansion bottle is mounted evening(https://uploads.tapatalk-cdn.com/20200630/4d356cd1ca9afc3bdfab1ae94ef689f4.jpg)(https://uploads.tapatalk-cdn.com/20200630/98dc0ee76ffc3bb1a24b9d43193edcae.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 01, 2020, 10:39:54 PM
That was a twat of a job getting that acordian pipe on.
Engine bay back together.
Front bumper half on. Need to finish that off tomorrow.
Also had confirmation my job role isn't at risk, so that's a bonus! (https://uploads.tapatalk-cdn.com/20200701/fa1c5e5ae10a9283dbd7ade66d6c4ba6.jpg)(https://uploads.tapatalk-cdn.com/20200701/4cdc6de36d48a480ec29250cce763c44.jpg)(https://uploads.tapatalk-cdn.com/20200701/f61288a73f6c8fc5a6ffa8db827def80.jpg)(https://uploads.tapatalk-cdn.com/20200701/86ad009a24d2816181d857ae7e6da381.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 02, 2020, 06:45:46 PM
Winner winner chicken dinner!!!

Great news on the job

Car looks good too


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 02, 2020, 10:39:21 PM
All back together. Need to drop it on all 4 wheels. (https://uploads.tapatalk-cdn.com/20200702/c2415e8973315897ead9a470c2dca267.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 04, 2020, 11:56:33 AM
Drives well. It's quieter.
Only problem is the PAS isn't kicking in. Fault code present(https://uploads.tapatalk-cdn.com/20200704/250375a291ff434592dcf70223e3e938.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 04, 2020, 05:11:44 PM
Looks like my earth connection to the EPS ecu was heavily corroded
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 04, 2020, 05:39:05 PM
Just started it problem solved
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 04, 2020, 11:18:35 PM
Drives well. Power delivery has changed a bit.
It's quieter. But does heat up loads when stood idling
(https://uploads.tapatalk-cdn.com/20200704/bc6a9055207473a47a503f6ebef41dbf.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on July 05, 2020, 05:49:29 AM
Liking this Paul.

You’re doing what Mazda should have done


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 23, 2020, 10:49:59 PM
So bit of an update.
Still running lean at light throttle at 5.5k.
Replaced the upper inlet manifold
Sourced a replacement set of Injectors
Checked all breathers /joints on inlet.
Checked fuel pump pressure (4.5 bar at a standstill)

Still running lean.

I've now resorted to replacing the exhaust manifold with the oe unit.

I've got some seals turning up from Clive for the injectors and VDI (https://uploads.tapatalk-cdn.com/20200723/fb8613fa4332a5211d887e913fb65950.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on July 23, 2020, 11:31:35 PM
Have you had the injectors cleaned at all?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 23, 2020, 11:53:10 PM
No, but the same symptom appears across both sets of Injectors I have tried, making me think it's something else.
A whole ago I had to weld up the exhaust mount due to stainless steel cracking under stress. I wonder if there's another crack I can't see
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on July 24, 2020, 01:16:24 AM
What about fuel filter? I take it its only going lean at 5.5k? Does it richen back up after that?

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 24, 2020, 07:26:30 AM
Yes, it's fine fine above 5.5k. 13:1 to 11:1 AFR
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on July 24, 2020, 09:35:38 AM
This just came to me(https://uploads.tapatalk-cdn.com/20200724/fced6d0902c0e25113d1ac601ac9a9d8.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on July 24, 2020, 11:40:57 AM
The engine is bridge ported. Might be the problem
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on July 24, 2020, 01:03:47 PM
I think the bridge port/tertiary ports open up around 7500 rpm based on the rotation of the sleeve.

That's what my bridge ported rx8 did. All on a stick ecu

The more you drive it the better the ecu compensates for the added air flow, its a smart ecu for what it is.

The problem is if you are watching the gauges all the time you are going to see things.

Best solution is to get rid of the gauge

Get some serious miles on the car and you will find that it goes away

With my bridged rx8 the "feel" of the engine power got better the more I ran it, possibly due to the engine bedding in and compression going up, but the transition of air and fuel delivery improved.

Best thing about it was that when the tertiary ports open you could feel the extra power come in and take you up to 9500 rpm without the power really dropping off

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 06, 2020, 11:29:55 PM
So I swapped the exhaust manifold, same problem.
Played about with the maf curve and it was better.
I've hooked up a temp pressure gauge to monitor fuel pressure. (https://uploads.tapatalk-cdn.com/20200806/2a02efa39ced33c2ee41862db514eb46.jpg)(https://uploads.tapatalk-cdn.com/20200806/ccb3507f9f165165947e3e327af216d8.jpg)(https://uploads.tapatalk-cdn.com/20200806/418d2593835ebdc9fb10fc52b08bea98.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 13, 2020, 07:12:23 PM
I have found the air leak..... Eureka
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 13, 2020, 07:21:59 PM
Go on ?


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 13, 2020, 08:17:34 PM
https://youtu.be/XBbxvnvH95I
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 13, 2020, 08:31:18 PM
Nice one bud


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 13, 2020, 08:55:16 PM
Need to catch up on your build thread later
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 13, 2020, 10:26:31 PM
Quote from: Paul_13 on August 13, 2020, 08:55:16 PM
Need to catch up on your build thread later
No rush it's just filler n grp, same old same old


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Mr Spiller on August 14, 2020, 12:21:21 PM
Happy days


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on August 14, 2020, 06:25:21 PM
Nice detective work Paul  :sign0098:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 15, 2020, 09:29:49 PM
Hmm (https://uploads.tapatalk-cdn.com/20200815/596d5008cb4139196c89aa733a34f1d4.jpg)(https://uploads.tapatalk-cdn.com/20200815/54a3cced230f11909cd1d0b969f09216.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Grant Monkhouse on August 16, 2020, 12:19:08 AM
At a guess I'd say they're brokened

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on August 16, 2020, 11:26:44 AM
Those could be a problem  ;)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on August 16, 2020, 03:25:33 PM
Not the Happiest I've ever seen
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on August 16, 2020, 04:12:28 PM
Hahaha I don't even know what the hell im looking at apart from its summat that's broken

Yeah Paul what they said ......


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 16, 2020, 11:26:40 PM
Tonight's job. Clean SSV housing.
What a c*** of a job(https://uploads.tapatalk-cdn.com/20200816/24acbce11204695fb1b5ffebd0be7b22.jpg)(https://uploads.tapatalk-cdn.com/20200816/42ff364bf525c2d34a300c00b39b0fd7.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 21, 2020, 09:28:00 PM
I'm still lurking. Works been manic and we're typing to move house which has added to the stress of things. Luckily we've ended up in tier 2,most of my family and friends are tier 4.
Ended up getting bored and removing all of the quiet exhaust mods I've done recently. The inner rude boy says I need more noise and flames to cheer me up(https://uploads.tapatalk-cdn.com/20201221/fc1d3c71d5f4a503250dcc377afab2b0.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on December 21, 2020, 09:30:06 PM
Glad your still around Paul, alive and well. How's the fingers ?


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 22, 2020, 07:17:40 PM
Better, but still not great. Its leaning towards my little finger quite a bit. Only option I've got is joint replacement

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 23, 2020, 11:59:25 PM
Like like were heading into tier 4 on boxing day so I thought it would be a good idea to take the mx5 for a spin. It's really on point and rapid with the aftermarket manifold fitted and dB reducer removed. Might look at the fitting the homebrew cold air intake again to see what the difference is

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 29, 2020, 10:47:21 PM
I fitted the home brew cold air intake and crikey its so much quicker. Spins the wheels changing gear and feels more on point all through out the rev range.
I've also been looking at building my own rx8 style back box. Jetex sell all the bits to fabricate your own back box.
On the bright side.... My wife found the missing smax keys my daughter lost and we sold our house today :) looking at an ex-mod house in Tadley.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on December 30, 2020, 06:05:15 AM
Congrats on the move, I've heard it's difficult atmo with everything going on.

Keys  ..... tick

And an increased 1000bhp.

2021 looking bright for you ole bean


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on December 30, 2020, 08:01:12 PM
Looking at installing a heimholtz resonator onto my exhaust to try and stop the drone.
Just need to figure out where I can fit it in!

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 01, 2021, 11:44:51 PM
And 2021 started off with a bang... Literally
Hit a deer doing around 50-60mph..
I just can't get my head around why mk3.5 parts are so hard to get hold of.
Looking at £250 used front bumper in red. Or £600 for one ready to spray + £300+ for new front grille.. (https://uploads.tapatalk-cdn.com/20210101/506fd5ea9a2be3efba948a7ec4b9b3d4.jpg)(https://uploads.tapatalk-cdn.com/20210101/e446442454ff2099e501e204a29c66b3.jpg)(https://uploads.tapatalk-cdn.com/20210101/660448a1f5c427d416acfda69c356757.jpg)(https://uploads.tapatalk-cdn.com/20210101/533ed6c8e8d8c9ee365a20da4f70d363.jpg)(https://uploads.tapatalk-cdn.com/20210101/0e8be89f7e857ed45a0cf5eec6c5915a.jpg)(https://uploads.tapatalk-cdn.com/20210101/e74975440149776a636b667d7ea91522.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: xamtex on January 02, 2021, 12:59:40 AM
did you take the deer home for dinner?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on January 02, 2021, 05:29:52 AM
Jesus Christ mate!

Glad ya ok. Could be worse


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on January 02, 2021, 05:33:18 AM
https://createmarts.com/products/car-bumper-crack-repair-welding-machine-set?fbclid=IwAR3pONgB8ffMqZin--8fCOZrtNN3Ag_cq__XNG6QDzUri_VVzbFE6UK5gBk

Ironically i posted this on Facebook like 3 days ago

It's on sale, 50quid for the gun and 14 quid for the staples

I was contemplating buying one of the off chance I'll need one for the future.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on January 02, 2021, 05:36:21 AM
Quote from: xamtex on January 02, 2021, 12:59:40 AM
did you take the deer home for dinner?
That's illegal, they class it as poaching.

However if a car pulled up behind Paul and put the deer in his boot, then that's not illegal, that's picking up roadkill.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: re japi on January 02, 2021, 08:05:11 AM
Oh s**t. And literally

Lähetetty minun G8141 laitteesta Tapatalkilla

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 02, 2021, 10:58:37 PM
Getting there with the paint removal. The paint hasn't adhered to the primer so it's coming off easy(https://uploads.tapatalk-cdn.com/20210102/d40f06626ea98ac907236f46579367b3.jpg)(https://uploads.tapatalk-cdn.com/20210102/a499f777d3aefca24b30e5474070cba4.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on January 03, 2021, 02:05:21 PM
Glad your ok...i always find after a crash thats blimin annoying at the time its the catalyst for the car to come bigger better than it was b4.

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on January 03, 2021, 05:25:37 PM
So glad to hear you are OK. Could have been so much worse - the mass of that deer, muntjac by the looks of it, would have been huge. Well done with the repair so far, looks like you'll get a good result  :icon_thumleft:

Shame about the deer though  :(
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on January 08, 2021, 07:15:36 PM
Bloody mot has run out on the 3rd. I thought it was tonight.
Nearly there with scraping the paint off. Annoyingly mx5 parts has run out of grilles...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 08, 2021, 05:56:35 PM
I'm still here, lurking.
Got a bit of an issue on the mx5.
I parked the car up for work this morning and got back in it this afternoon to drive home. All was well for the first 2 mins and then the car starts smoking quite badly.
I think I've blown an oil seal, it clears when warm.
The oil pressure at idle has dropped to 1 bar.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on April 08, 2021, 06:59:35 PM
Unfortunatly I would say one of the Rotor "rubbers" has failed because you are able to burn off the oil thats getting in the chamber :-[
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 08, 2021, 07:48:02 PM
I can't tell if you're being sarcastic or not :D
What's a rotor rubber

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 08, 2021, 07:57:28 PM
The oil control rings have gone on mine, mine smokes and stinks to high heaven. I see it as extra lube for the apex seals lol no need for r3 spec 3rd omp injector hahaha.

I take my decent cat off too and put it on for it's annual test coz the excessive oil killed the internals on my last cat.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 08, 2021, 09:14:34 PM
I think the flames have killed the rings

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on April 09, 2021, 08:32:00 PM
One of these will have failed
https://www.racingbeateurope.com/mazda-rx8--r3-rotor-oil-control-ring-set-2222-p.asp
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 25, 2021, 05:40:18 PM
Weirdly the smoking has stopped...

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 25, 2021, 05:45:15 PM
Post bumper repair(https://uploads.tapatalk-cdn.com/20210425/ed74d8eba1d2b125794ea7933cea4d21.jpg)

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(https://uploads.tapatalk-cdn.com/20210425/071706953673e32f1369386a9f2f43c3.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 25, 2021, 05:48:42 PM
Welded a heimholtz resonator onto the exhaust. Has helped slightly.
I did an an extra 90' bend(https://uploads.tapatalk-cdn.com/20210425/95a1df102a985baff7204a8606de56a8.jpg)(https://uploads.tapatalk-cdn.com/20210425/82357dcbf700031ed81fe11f04a84359.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 25, 2021, 05:49:07 PM
Just bought a bmw m140i back box... Will post some pics shortly

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on April 25, 2021, 08:43:33 PM
Pics(https://uploads.tapatalk-cdn.com/20210425/004ba241105756058a1178b87e5c0550.jpg)(https://uploads.tapatalk-cdn.com/20210425/0e5926b2ae0466ec593092008fb0e1dd.jpg)(https://uploads.tapatalk-cdn.com/20210425/a596c1c5dcb83176588769b90b39b727.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on April 26, 2021, 06:38:34 AM
Nice progress Paul


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on April 26, 2021, 11:55:09 AM
Front bumper looks as good as new Paul. Welding looks great too  :icon_thumleft:
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 02, 2021, 12:37:24 PM
Few more progress pics(https://uploads.tapatalk-cdn.com/20210502/64c50a7df248ff6e4fb448802ed5a794.jpg)(https://uploads.tapatalk-cdn.com/20210502/61bd0b3fcfd7fc2f0f9991bc4e1a7ff2.jpg)(https://uploads.tapatalk-cdn.com/20210502/6fe1d7295b2950d1ed349aac66380723.jpg)

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(https://uploads.tapatalk-cdn.com/20210502/bf40296a731d5796dd7606af21e05544.jpg)
(https://uploads.tapatalk-cdn.com/20210502/d7e73bee97259310cb998de33203047e.jpg)
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on May 04, 2021, 11:21:43 PM
All mounts on. Just waiting on a 3" 90 bend(https://uploads.tapatalk-cdn.com/20210504/92b04a955bda3fdb73834684be8328ac.jpg)

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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on February 01, 2022, 09:37:03 PM
Update time!

The engine still smokes badly on cold start. In the process of removing engine to give to Haywards.

Meanwhile the Stagea is being used as a daily.


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Jamie R on February 03, 2022, 07:24:28 AM
Smokey joe

Nice stagea


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 17, 2023, 02:37:43 PM
Hello all.

Back again.

The replacement engine has very low compression and only last just over a year. 5.8 on the front and 3.8 on the rear... Haywards are at a loss why its failed

Haywards have helped me out and are in the process of building me replacement engine for a very good price.

I'll post some pictures soon.

Going to spend a bit more time on here. RX8OC has gone to pot
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Mr Spiller on June 17, 2023, 04:38:14 PM
Quote from: Paul_13 on June 17, 2023, 02:37:43 PMHello all.

Back again.

The replacement engine has very low compression and only last just over a year. 5.8 on the front and 3.8 on the rear... Haywards are at a loss why its failed

Haywards have helped me out and are in the process of building me replacement engine for a very good price.

I'll post some pictures soon.

Going to spend a bit more time on here. RX8OC has gone to pot
yes it has


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Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on June 17, 2023, 06:21:10 PM
Quote from: Paul_13 on June 17, 2023, 02:37:43 PMHello all.

Back again.

The replacement engine has very low compression and only last just over a year. 5.8 on the front and 3.8 on the rear... Haywards are at a loss why its failed

Haywards have helped me out and are in the process of building me replacement engine for a very good price.

I'll post some pictures soon.

Going to spend a bit more time on here. RX8OC has gone to pot


You should know you are very welcome on here Paul along with anyone with a Rotary interest, hope all goes OK for you.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 17, 2023, 07:00:01 PM
It's good to see that the forum has been updated. Really easy to use and looks great
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 04, 2024, 06:48:04 AM
Morning all.
Been meaning to post up here for a while, life and 3 kids getting in the way.

Had a few ups and mostly downs with the car over the last year. 2 engine rebuilds later + many many many months of waiting for a replacement engine it's back on the road.

I carried out a compression test at the weekend (cold engine, yes I know) and it barely made it over 4 bar. I need to repeat with a warm engine and see if the results improve, but at least the spark plugs weren't covered in oil this time round. The engine has done around 1.4k miles and expected the compression results to be a bit than that!





Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on June 05, 2024, 06:56:51 AM
So sorry to hear this Paul and unfortunately with all the issues I have seen you post up, lack of compression has obviously always been the cause.

I so hate reading about yours and other stories like yours as the Rotary just ends up with a bad name when its not actually the engine that's at fault.

I had the same happen to me last year so sadly I know how you feel.

Paul I will ask someone who is reputable if they still have an engine that I know had very very little mileage, excellent compression and had never been opened.

I will see if its still available and how much later for you.       
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on June 05, 2024, 07:52:12 PM
Quote from: clive on June 05, 2024, 06:56:51 AMSo sorry to hear this Paul and unfortunately with all the issues I have seen you post up, lack of compression has obviously always been the cause.

I so hate reading about yours and other stories like yours as the Rotary just ends up with a bad name when its not actually the engine that's at fault.

I had the same happen to me last year so sadly I know how you feel.

Paul I will ask someone who is reputable if they still have an engine that I know had very very little mileage, excellent compression and had never been opened.

I will see if its still available and how much later for you.     

Many thanks again Clive. I did respond to your email.
Just praying it keeps running as funds are tight at the moment
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on June 11, 2024, 08:11:04 PM
Sorry to hear this latest news on your engine, Paul  :(
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 14, 2024, 09:11:04 AM
A few progress pics.
The amount of sealant used is insane.
Lots of magic sparkles
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 14, 2024, 09:19:57 AM
Not sure why the pictures posted twice. I can't seem to edit either
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 14, 2024, 01:39:45 PM
First thing I noticed is that the rear rotor housing outer coolant seal was completely missing...
Not sure if rear iron is salvageable, there are some pronounced ridges where the side seals run
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 14, 2024, 01:41:56 PM
Broken side seal on rear rotor middle iron side with heavy damage to rotor side. Bearing is completely trashed. E shaft faired pretty well!
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 14, 2024, 01:49:02 PM
Middle iron heavy damage.
Both housings have chrome peel.

Whole lot is pretty much scrap.

Considering the new engine is making as much compression as this engine did on the failed rotor, I will be buying my old 330i touring back from my mate and breaking the mx5 I think.
Over 5 years, the engine builder has had £5k~ from me and I still do not have a fully working engine.

Doing this engine conversion has been a learning curve and a bit of fun, but finances are tight at the moment with 3 children and I need to cut my losses.

Thanks to every one who has offered me help over the last few years, it has been appreciated.

There will be a load of parts listed for sale in the next month or 2 on here as I've just renewed my membership
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on August 15, 2024, 08:29:29 PM
Paul. I am absolutely mortified to see this has Happened to you.

Sadly over the years I have seen many walk away from the Rotary scene purely due to multiple Bad Engine builders that have come and gone :angryfire:

It so annoys me as these things happening gives the Rotary a totally uncalled bad reputation.

Paul. "if" you have receipts,  I can only advise going to citizen advice first, which is free, then the small claims court which I think costs £250 to try and at least get some money back.       
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 15, 2024, 08:41:55 PM
Hi Paul, dont break it park it up and look for rusty rx8..with good running engine..?
My last engine in westy was from a crash damaged car..it was sweet.
Ive asked Wayne if he knows of any engines..he get em for his race car.


Sent from my SM-G977B using Tapatalk

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 17, 2024, 02:29:59 PM

Quote from: clive on August 15, 2024, 08:29:29 PMPaul. I am absolutely mortified to see this has Happened to you.

Sadly over the years I have seen many walk away from the Rotary scene purely due to multiple Bad Engine builders that have come and gone :angryfire:

It so annoys me as these things happening gives the Rotary a totally uncalled bad reputation.

Paul. "if" you have receipts,  I can only advise going to citizen advice first, which is free, then the small claims court which I think costs £250 to try and at least get some money back.       
No receipts unfortunately. Seems to be a recurring theme, other people I have spoken to haven't had receipts either.
The thing that annoys me the most is when the rotor oil seal was repaired (at the cost of £900) around 5k miles before it failed spectacularly. I was told the engine was immaculate condition and if I bought new apex seals it would of been given warranty.
But judging by the state of the engine in the photos, it was not in immaculate condition and I highly doubt if I had of opted for new apex seals they would of been fitted.

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on August 17, 2024, 02:31:24 PM
Quote from: boosted on August 15, 2024, 08:41:55 PMHi Paul, dont break it park it up and look for rusty rx8..with good running engine..?
My last engine in westy was from a crash damaged car..it was sweet.
Ive asked Wayne if he knows of any engines..he get em for his race car.


Sent from my SM-G977B using Tapatalk



I haven't got the spare cash unfortunately, need to break/sell mx5 to fund new car
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: boosted on August 17, 2024, 06:35:17 PM
Sorry to hear mate...
I blew 2 engines in westy...
3rd from crashed 8 was a peach.
Family first


Sent from my SM-G977B using Tapatalk

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Casey on August 21, 2024, 12:56:59 PM
I'm so sorry to hear the latest news on this ongoing sad saga, Paul. Such a terrible experience for you to go through, at great expense too  :(

Sad to have to break it, after all the hard work you have put in, but understandable.

Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 12, 2024, 06:15:16 PM
Argh it's not even Friday the 13th yet and I'm having rotten luck. The clocks just ticked over 100k and a coolant hose went bang on the way home, should of stopped sooner than I did but it didn't go into the red on the clocks
It drank 9l of water when refilling.

The engine still starts...

How do these engine fair with this sort of things?
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 13, 2024, 12:10:23 PM
I've replaced the hose, refilled and bled the coolant and it started OK.
Got it up to temp and there's no obvious bubbles appearing in the coolant tank.

Might of got away with it
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 14, 2024, 09:11:26 AM
If your not seeing bubbles you may well be OK.

Paul, good to see you got an engine back in the car somehow ?.   
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Paul_13 on September 14, 2024, 01:11:48 PM
Quote from: clive on September 14, 2024, 09:11:26 AMIf your not seeing bubbles you may well be OK.

Paul, good to see you got an engine back in the car somehow ?.   

It's the replacement engine that's got low compression. The pictures above are from the first engine which failed
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: clive on September 15, 2024, 07:43:26 AM
Very pleased to  hear you have an engine back in the car and didn't abandon the car after all the work you have put into it.
Title: Re: MX-5 NC with RX-8 231 Engine
Post by: Eccentric shaft on September 16, 2024, 09:26:33 AM
Sounds like a close call, that. Well done to save it!  :great: 
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