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Old 04-16-2015, 09:09 PM   #1
MisterBlah
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Default Front drive power limits?

So, I'm starting the powertrain and drive train build for an 818 kit car. If any of you know anything about it, then you know it is a mid engine kit car that uses only the front drive line of a Subaru. My curiosity is currently centered around how much power and more importantly, how much torque I can build the motor to since the car only uses the front drive line.

So, does anyone know what a stock 5 speed or sti 6 speed can handle through the front wheels, alone? I've heard in various places, including here, that the sti 6 speed can handle 550 lb-ft of torque, but nothing said ever mentions the specifics of front our rear limitations.
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Old 04-18-2015, 02:02 AM   #2
Uncle Scotty
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nobody knows

there is no way of telling what the 818 chassis will do

there are MANY factors....weight...wheel/tire size....fd ratio.....lsd or not and what type....clutch---I would NOT use any sort of 'racing' clutch unless and until you deem it necessary---and it may not be if the car is light enough

I would think that a 4.11 fd with a helical lsd wouldn't be likely to break the 5mt unless wide slicks are used and somebody seriously ham fisted it badly....but....

YOU are the guinea pig....YOU tell US

I wouldn't use a 6mt unless it was the last option


a v7 or v8 jdm motor reved out to 8k in that would rock
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Old 04-18-2015, 03:07 AM   #3
Bikelok
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I agree with Uncle Scotty.

It's going to be very light, so the 5 speed and a OEM type clutch would be my choice.

The 5 speed will most likely hold up just fine in such a light car and only driving 2 wheels.

While the 6 speed is very burly, it's also real heavy too.
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Old 04-18-2015, 03:23 AM   #4
Uncle Scotty
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and the whole reason to use a trans with more gears(other than idiot kiddies thinkin they NEED moar) is that the motor isn't flexible enough with its power delivery and you need the gears to keep the motor in the power band

the jdm v7 or v8 2.0 with any reasonable size turbo wouldn't need that unless somebody really stupid tuned it or set it up totally wrong

id suspect that it would be just STUPID FAST with even just 300whp...and an 18g on e85would ROCK that
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Old 04-18-2015, 01:43 PM   #5
Bikelok
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Quote:
Originally Posted by Uncle Scotty View Post

id suspect that it would be just STUPID FAST with even just 300whp...and an 18g on e85would ROCK that

That would rip!!!

It would also be reliable too.
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