I want the engine to rev at arond 2000 rpm at 60 mph, so using 4.11 gears on a 0.72 overdrive with 30" tall tyres is the go.
The taller the first gear the better. The multiplier effect of first x rear gears makes a shorter first gear less practical. I have a T5 in my falcon sedan, and it has a 3.25 first gear with a 3.27 lsd. With 25" tall tyres, I can get 30 mph out of first, at around 4000 rpm, enough for the drags in my coupe.
Joe what did you get your 3.7 first gear'd T5 out of? do you have any numbers?
Cheers
Mark
