Gearing for this turbo fed street car....help
02-22-2014, 04:35 PM
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Gearing for this turbo fed street car....help Alright I'm not sure if this was the right place for this, but I figured there would be more turbo people reading it here. I just got my 9" for my 97 ls swapped rear mount trans am. Its a convertible with a roll bar and extra weight adders so I would say it weighs in around 4000 lbs. I had 3.42s in the 10 bolt and it would pull harder in third gear than it would in first or second. The car is an A4 with a 25-26" drag radial. The turbo is a rear mount t76 with a .96 ar exhaust. I was told that it needs more load on the engine to produce the heat the turbo needs and that I should be looking for a higher gear ratio like a 3.00 or 3.25. I don't want to go too high so I am looking into what is working out on the streets.
02-22-2014, 06:34 PM
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I was wondering if I would need anything higher since it is a rear mount. The car started out with 3.23 pre turbo and I didn't notice much when I went to 3.42. You think it would be enough of a difference?
02-22-2014, 08:10 PM
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When you guys run the really long rear end gears do you have any issues with cutting good 60' times? I see people often posting about running 3.50-3.25 or even lower numerically, but is that more of a street car thing to help spool, or would that apply to a track only car too?
02-22-2014, 08:50 PM
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My 3.42s cut a 1.96 on drag radials foot braking to 2300 so I don't know wether a higher gear would help me or not. That's what I'm trying to cure.
02-23-2014, 04:42 AM
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When you guys run the really long rear end gears do you have any issues with cutting good 60' times? I see people often posting about running 3.50-3.25 or even lower numerically, but is that more of a street car thing to help spool, or would that apply to a track only car too?
