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      01-03-2012, 11:16 PM   #42
Twisted Six
CarbonFiber Engineer @ ZeroMassMotorsports
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Drives: Z4si-coupe
Join Date: Mar 2009
Location: -Laguna Beach Ca.

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Quote:
Originally Posted by ZooyorQ View Post
My M3 (e46) Getrag tranny and the Z4M ZF tranny aren't geared all that different and I think the final ratios are pretty close as well. The gearing up top is perfect but the gearing down in 1st/2nd is way to aggressive..

Changing the final drive would probably net you better results in 1st and 2nd but you'd be sacraficing 3rd-6th.. the ultimate thing would be to find out a way to gear 1st and 2nd to be a bit longer.. especially 1st.. M cars have always had a notoriously low first gear.. which creates the impression that the car is quickier then it really is.. soon as you add F/I that 1st gear is absolutely worthless.
Red above ^

One thing for sure.....you'll want to find the gearing that allows to match the sweet spot where your choice of turbo breathes the hardest and lives there the longest for the most torque and drive-ability.....but I'd bet your already schooled on those points.
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