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Good info in this thread. I'm doing a similar thing but with S5 block a 62-1, .96 a/r. The customer wants 400hp at wheels so I'm concentrating on making the engine as efficient and responsive as possible so its not working too hard to make the power. The car will weigh about 1900lb so power to weight should be good, especially for road use.

R.P.M.

So would leaving the port timing close at its stock position, but open earlier help with bottem end power?

Psycho_Dad

im not meaning to think outside the square or anything... but if he wants instant power on the roll on(and i agree that the turbo ideas here are very good) but why not supercharge the bloody thing

admittedly it weighs more, but if he really wants fast response down low(and 500 odd hp) wouldnt a s/c be the most obvious answer? or have i just spent the last few sentances commiting sacralige?



Peace

Psycho_Dad

RONIN FC

From my experience, its hard to make a super charger efficient all the way to 8000 rpm. Not saying it isnt possible,







Turbo is more efficient on high reving engines.

SomeGuy_sg

I think i got the answer for your customer :P get a V8 . For that kinda power and torque with a low rev limit like 7000 it would be good for his applications.