Originally Posted by DirtyD
Assuming my redline is set to 7200 RPM, in 4th gear (1.32:1) with 3.55s and a 27" tire, I'll be turning around 123-124 MPH.
A 26" tire would basically give me 118-119 MPH at 7200 RPM redline
I think a 26" tire height is my best bet for the power level I will have my car at for a long while before boost. I should never trap more than 118-119 if I'm around 420-430 rwhp (after E85 conversion and maybe a TB). Right?
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You will want to give yourself a little cushion. Peak power with the stock intake is going to be around 6,500. 118 with a 27" tire and 3.55 is ~6,900.