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Mazda Rotary Club

Cars by Model Type => Cosmo's and Other Rotary Powered Vehicles => Topic started by: boosted on September 06, 2014, 12:13:37 AM

Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on September 06, 2014, 12:13:37 AM
(http://i1065.photobucket.com/albums/u397/boosted38/2014-09-05213754_zpsa3cff196.jpg)

(http://i1065.photobucket.com/albums/u397/boosted38/2014-09-05213701_zpsb8080e7e.jpg)
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on September 06, 2014, 12:31:42 AM
better photos tomoz.....4 hour round trip in the car 12 hours on the car its alive!

231 SP install into mk3 mx5.

donor was immobilsed. injector plugs on wrong injectors. not doing start up routine...loose connection...leads dead.....

done in me! but it runs!
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on September 06, 2014, 12:35:07 AM
(http://i1065.photobucket.com/albums/u397/boosted38/2014-09-05213821_zps4ec650f5.jpg)

eyes are still stinging from upteen defloods.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on September 06, 2014, 12:37:18 AM
(http://i1065.photobucket.com/albums/u397/boosted38/2014-09-05213746_zps8b9f139d.jpg)

soz photos are hazy.....workshop full of smoke.....because race car!
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on September 06, 2014, 12:39:40 AM
(http://i1065.photobucket.com/albums/u397/boosted38/2014-09-05213835_zps4b09e62c.jpg)
Title: mx5 mk3 rx8....running after 12 hours!
Post by: clive on September 06, 2014, 01:31:15 PM
Well done getting it going Jon, especially after all that time the team lost with their "specialist"-------- I knew you would sort it , just mine to  sort now :D
Title: mx5 mk3 rx8....running after 12 hours!
Post by: re japi on September 06, 2014, 05:59:28 PM
Good job Jon! :)
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on September 06, 2014, 07:38:10 PM
Both me and Matt nearly torched it a few times! Basic fault was car was immobilised. And this was not realised by guy doing conversion i think and then some added faults trying to fix afterwards 1 injector unplugged etc and rear housing was only 1 getting fuel. Still need to verify 100% that plugs are on right injectors for hi power and secondary.
The throttle response on fly by wire needs looking at further.

Didnt realise that this model mx5 nearly became rotary powered and shares same chassis platform as rx8.

This car has the 8 front subframe and engine fits perfect and gearbox lever sits in original position.  

theres still loads todo on it and i expect ill be involved again! Matt\'s offered me a go on track once done which is motivation enough!
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on September 19, 2014, 07:38:16 PM
Title: mx5 mk3 rx8....running after 12 hours!
Post by: Brett on September 25, 2014, 10:33:43 PM
Great work - you should be proud of that one! :)
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on October 18, 2014, 09:19:24 PM
Had another day helping out on this today...

taking shape bigtime and some lovelly racing beat parts on it!

Held 1 of Clives Ballastic race batterys ....unbelivable 500g?

Managed to splice the rear end lights and abs into the rx8 loom.

its running great...8hr endurance race looming lots todo!
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 02, 2014, 07:29:15 PM
(http://i1065.photobucket.com/albums/u397/boosted38/2014-11-02132302_zpsc20050f8.jpg)

ended up in my garage for a few electrical gremlins to sort!
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 02, 2014, 07:30:26 PM
(http://i1065.photobucket.com/albums/u397/boosted38/2014-11-02162416_zps3f2d652e.jpg)
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 02, 2014, 07:33:58 PM
(http://i1065.photobucket.com/albums/u397/boosted38/2014-11-02122139_zps7bddc6cb.jpg)

we had to drive it to test it.....this shifts....makes my 8 feel lethargic.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 02, 2014, 07:36:23 PM
(http://i1065.photobucket.com/albums/u397/boosted38/2014-11-02140356_zps2ef1ad99.jpg)
all my cats are rotor heads!
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 02, 2014, 07:44:14 PM
Think ive sorted now was cutting at 7000rpm. oil misting on maf....not 100% as got a leaky oil hose when testing. but fingers crossed.
Got the eps, abs working.

handles sublime realised that my race car handles no where near like this!:mad: But it is quicker in a straight line:chat
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 02, 2014, 08:56:24 PM
raaa still not 100% head in drawings will pull gears 1.2.3 to 9k for 10 plus runs then cut at 7000. same feed for Maf, IAT and hi Power fuel relay...getting codes for iat, maf and barometric. been ecu pin to plugs all good. Unsure volt drop/short . gonna rewire and replace relay in morning.
Its gotta do an 8hr endurance next sat.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: clive on November 02, 2014, 09:55:52 PM
Is the  barometric sensor still connected as I have mine plugged in and I\'m sure you need it to me this a distinct posabilaty for what you describe
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 02, 2014, 10:20:11 PM
Its in bud on the 2nd 1 maf changed as well and cleaned. Codes are all pionting to voltage drop/ break in feed. I got a few hours b4 work tomoz to rewire . Summit funny going on. Cut out and replace.

i want 1 though!
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 03, 2014, 07:48:19 PM
Car picked today and been ragged around an airfield and all seems fine now. Result a Mk3 rx8mx5 in the UK!
 
i need abit of help from you race guys/trackers on oil usage the car will be coming into the pits every hour for fuel. so will neeed topping up with oil but whats usage gonna be like and any recommendations for how much how often?
Title: mx5 mk3 rx8....running after 12 hours!
Post by: Casey on November 03, 2014, 10:38:12 PM
A hour on track is about the same as a morning on a trackday (4x 15minute sessions). In that time I\'d expect to top up with (very approximately) a half litre, or slightly less than that. If the oil starts at ~3/4 on the dipstick, to avoid oil being blown back into intake, then a top up of around 1/2 litre every hour should be fine. Engine temperature management will clearly be crucial if running endurance.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 03, 2014, 10:56:03 PM
Cheers Casey. Will pass info on...

Hopefully cooling ok theres been no time for them to test....But it has a combined rad oil cooler by Radtec ....its mahosive so fingers crossed.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 07, 2014, 11:33:28 AM
Just heard from Matt...theyve made it to Anglesey and are testing now!...Got some heat management issues.....oil getting to hot so advised to plumb in a 2nd oil cooler as demon Tweeks not to far away!....

9 hour endurance race this sunday if anybody local....should be awesome to watch and hear!
Title: mx5 mk3 rx8....running after 12 hours!
Post by: Casey on November 07, 2014, 12:10:59 PM
Yep, I feared they might run into heat management issues. Let\'s hope the 2nd oil cooler will do the job.

I hope someone can get to the race on Sunday and take some pics and video.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 07, 2014, 08:24:35 PM
me 2 shame i cant make it too much on. and miles away....sounds awesome and flame thrower to boot! Matt and 2 others driving...hes a multiple champion so could be interesting!
Title: mx5 mk3 rx8....running after 12 hours!
Post by: re japi on November 08, 2014, 05:12:32 AM
How much that car weight?
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 08, 2014, 08:23:49 AM
Its on Matts todo list.
was a school track car with 2.0 duratec or duratorq init.
So cage been added .
But fibre glass bonnet and doors. Roof removed. Ac egr and airpump gone.
No ew cl etc.
front and rear rx8 subframes fitted along with 8 ppf...with 14" cut out.
Its also had a 4.7 cwp made for the s1 diff.Bum dyno it felt rapid and planted.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: re japi on November 08, 2014, 11:14:35 AM
Ok, some things has be done allready. :) Just looked so stock.

Was is hard to fit rx8 subframes on it? Cause I remembered Steve saying that there are not much difference between those two models.

Does he need s3 lump with 5,125 and lsd? ;)
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 08, 2014, 12:16:42 PM
Subframes just bolted in relatively straight forward. the power plant frame tieing the diff to the gearbox just needed shortening.

It looks a straight forward job...this 1 was complicated because the donor was bought salvage and immobilsed....and not realised.

thing is if you thought about it you could reverse engineer it back and put the 2.0 duratec/torq engine in an 8!

Flame proof underwear on! but here goes....

seriously though literally buy 2 cars 1 rx8 1 mx5 mk3. swap engines and boxes. looms etc still left with 2 cars at the end! get the 2.0 sport mk3 though.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 08, 2014, 04:07:45 PM
Just heard car all sweet qualification going well...not sure how that works for endurance racing.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 08, 2014, 06:52:33 PM
https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCEQFjAA&url=http%3A%2F%2Fwww.raceofremembrance.com%2F&ei=YmZeVIvNMsbQ7AaoqIAI&usg=AFQjCNG45_M_OBpJ-SVxMd8A3-tUNjDvmw&sig2=Fm6Z85sKIyg4uf3PKqqLcQ&bvm=bv.79189006,d.ZGU
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 09, 2014, 05:15:19 PM
not heard from Matt today but found the timing website and does not look good...case of flyin and dying...some quick laps followed by slow laps and pitwork.

dunno if they fitted that 2nd oil cooler as advised but summit up.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: re japi on November 10, 2014, 03:55:42 AM
Does he have incar video onboard?
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 10, 2014, 08:34:20 AM
heard from mate said epic fun all day but battling a fuel pressure issue all day. Run sweet for 10 laps then loose all pressure.
asked if any vids/pics if i get some ill post up.
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 12, 2014, 08:48:48 AM
(http://i1065.photobucket.com/albums/u397/boosted38/IMG_9564_zpsd08b853c.png)
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 12, 2014, 08:50:22 AM
(http://i1065.photobucket.com/albums/u397/boosted38/IMG_1981_zps022872fd.png) proof its a rotor! They wanna 3 rotor it now!!! I think Matt will probably do it! lol
Title: mx5 mk3 rx8....running after 12 hours!
Post by: re japi on November 12, 2014, 09:02:17 AM
Spitting fire, nice :D
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 12, 2014, 05:55:04 PM
its burnt out 2 fuel pumps in 8 hours those flames ignited some spilt fuel in the boot and caused a flash over whilst out on track....all 4 drivers loved it!
Title: mx5 mk3 rx8....running after 12 hours!
Post by: re japi on November 13, 2014, 04:15:37 AM
2 fuel pumps?  Do you know why?
Title: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on November 13, 2014, 09:03:51 AM
Not 100% but sucking air me thinks fuel surge. I modded to 12v only running. Matt fitted a swirlpot after. They where loosing pressure after 10 laps. So i think pump over heating. Also fpr fitted on the bulkhead set at 4.2 bar as per mazda manual. Dont know tbh. Its getting a new tank and redesign.
Title: Re: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on October 09, 2015, 10:15:10 AM
Hi Rees,

This was the mini thread on the RX8 converted mx5.
Title: Re: mx5 mk3 rx8....running after 12 hours!
Post by: efini85 on October 13, 2015, 11:47:59 AM
Quote from: boosted on October 09, 2015, 10:15:10 AM
Hi Rees,

This was the mini thread on the RX8 converted mx5.


Thanks Jon,

Will see what we can do with ours.


Kees
Title: Re: mx5 mk3 rx8....running after 12 hours!
Post by: boosted on October 14, 2015, 12:52:27 AM
Cool....dont forget a build thread....with a lot of piccies!
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