Author Topic: Finnish race car project  (Read 11505 times)

Offline re japi

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Re: Finnish race car project
« Reply #345 on: July 16, 2017, 12:24:10 PM »
Rallycross Mazda RX-7 13BPPN/A (3): http://youtu.be/iI9JxEvpxQk

Rallycross Mazda RX-7 13BPPN/A (4): http://youtu.be/z3rnDzkOeE8

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Re: Finnish race car project
« Reply #346 on: July 16, 2017, 04:12:27 PM »
wohoo, lovely Brap!  :sign0098: :13: :great: :P 8).
92 FD rx7 Twins 13.5psi. Track car
94 Westfield Se 231 rx8 street port powered. Race car
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Offline re japi

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Re: Finnish race car project
« Reply #347 on: July 16, 2017, 04:35:46 PM »
It really sounds epic!!! I recon its because it has long exhaust system. But I think it needs to be redone, its frickin loud! Only revved it up to maybe 2500rpm, I wonder what noise it will make at 10k...

But what really confuses us is that idle is really nice, smooth and in quite low revs. Maybe only 1000-1100rpm...

Makes us wonder how "mild" ports and port timing Carl did..? I quess he does know what he is doing, so no worrys there. Afterall, bro asked him to do max rev range and torque, not max power...

But you cant believe our filings now! One big step forward was agognizing 5 year wait... To this point it has been really epic journey, and its only just has begun basically! So that you for your support!!!
Braplife and rotarded for life!!!

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Offline re japi

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Re: Finnish race car project
« Reply #348 on: July 17, 2017, 11:43:52 AM »
Oh..  For example Clive, Jim, Kev and Aston sae my filings at holland when I heard that IT has started. Did I look happy?

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Re: Finnish race car project
« Reply #349 on: July 17, 2017, 11:53:55 AM »
Whens it shake down on a track ?

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92 FD rx7 Twins 13.5psi. Track car
94 Westfield Se 231 rx8 street port powered. Race car
EAT SLEEP ROTOR REPEAT.

Offline Grant Monkhouse

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Re: Finnish race car project
« Reply #350 on: July 18, 2017, 12:51:17 PM »
Port timing on a PP... well the port is never actually ever closed is it the apex seal is what would close but they're only 2mm wide. So I would say you have 359.8 degrees of inlet timing

From what I can remember carl does 2 different port shapes on a PP, one is a squared of corners port, which gives max power max inlet etc and a D shape port which is more for a less of an extreme engine, more of an endurance engine so I'm guessing yours is the D shape port.

What size were the PP inlets welded too the housings? I'm prett certain Carla largest ones are either 62 or 64 mm diameter?

Are you using IDA carbs? If so what size are they?

Can't say what timing you need to put into it if the engine is running hot, I would suggest a call to Carl and he will point you in the right direction

What length have you done the primary exhaust headers before merging them into one? Varying lengths have a great effect, I learnt all this stuff years ago as my Rx4 was meant to be PP bit I've forgotten it all now! I had even contacted racing beat for advice and got a couple of emails from Jim Merderer himself!


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Offline Casey

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Re: Finnish race car project
« Reply #351 on: July 23, 2017, 06:37:04 PM »
Looks great and sounds amaaaaazing  :13:
RX-8 230 Bridgeported: Racing Brake Disks & 4 pot front calipers,Full Racing Beat (RB) SS Exhaust system,RB ARB's F & R,RB REVI intake,Tein MonoFlex Coilovers & front strut brace.
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Offline Grant Monkhouse

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Re: Finnish race car project
« Reply #352 on: July 26, 2017, 03:56:20 PM »
Did carl explain about the intake trumpet length to help move the power into a range where best suits you?  Long trumpets should give better longer mid range torque, shirt ones make it peaky and make power up in the higher revs?


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Online Essex2Visuvesi

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Re: Finnish race car project
« Reply #353 on: August 06, 2017, 10:05:23 PM »
Moi!

Just thought I'd pop in and say hi

I live part time between UK & Finland (Hence the name) and live about 2hr or so north of you in Visuvesi (Near Ruovesi)
My Finnish is shockingly bad even tho I lived and worked there for more than 5 years!

Offline re japi

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Re: Finnish race car project
« Reply #354 on: August 08, 2017, 07:21:11 AM »
Moi!

Just thought I'd pop in and say hi

I live part time between UK & Finland (Hence the name) and live about 2hr or so north of you in Visuvesi (Near Ruovesi)
My Finnish is shockingly bad even tho I lived and worked there for more than 5 years!
Moi! :)

Well, rotarys here are not as common as in UK. But we have little club which has about 30 active members and maybe 500 followers. Please check out Rotary Garage at Facebook. There we also have some other nationality members so feel free to join us... :)

Dont worry about your finnish, I cant speak it either. And some of these people here knows that my english is shit too ;)
Power is nothing without control. Weight is enemy of performance, handling and braking.

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Offline re japi

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Re: Finnish race car project
« Reply #355 on: August 08, 2017, 07:36:45 AM »
Grant,  seems like my brother hasnt answered you, even that I told him to long time ago :D

Yes, I recon its D shaped, not sure tho. I think inlet is about 56mm. Carb is 48. Quite "neutral" setup maybe, but bro wanted it that way.

Yes he did explain that trumpet stuff. Dont remember how long those are. Seems like quite normal lenght to me :D

When bro build that exhaust, we thought that long system would bring better torque. I think primarys are about 2 meters, and measurements are from Carl... But now we are not so sure about which is better. Some say that there is now big difference, and long system is better in all areas. I have tryed to learn and asked lots of questions in different places. But that long system is heavy, no doubt about that...

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Power is nothing without control. Weight is enemy of performance, handling and braking.

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Offline re japi

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Re: Finnish race car project
« Reply #356 on: October 26, 2017, 08:40:47 AM »
Bugger... Well, now "power" is falling from the sky...   But I did have fun driving my AWD Toyota to work

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Re: Finnish race car project
« Reply #357 on: October 26, 2017, 02:23:37 PM »
Blimey, I dont like snow atall.

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92 FD rx7 Twins 13.5psi. Track car
94 Westfield Se 231 rx8 street port powered. Race car
EAT SLEEP ROTOR REPEAT.

Offline re japi

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Re: Finnish race car project
« Reply #358 on: October 26, 2017, 05:11:06 PM »
Why that pic is up side down????

Yes, I dont either. I hate it. Only good snow is on ice, at frozen lake, marking the "race track"

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« Last Edit: October 26, 2017, 05:12:41 PM by re japi »
Power is nothing without control. Weight is enemy of performance, handling and braking.

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Re: Finnish race car project
« Reply #359 on: October 26, 2017, 09:40:07 PM »
Central Finland this morning
Heading Back on the 10th of November