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Discussion Starter #1
Quick Q:

I have checked various previous threads but haven't come up with a great answer. I have an '89 with a 331, and 67mm turbo. I run a stock T5 with 3.73s. I think the gears are currently a bit to steep for the turbo setup, and was thinking of going with something a bit taller. 3.55s or 3.27s. Which would work better for my setup?
 

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I'd do 3.08 maybe even 2.73's , what is the car used for ? The longer the gearing the longer you stay in boost .
 

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Mine has smaller twins with 3.27's & 26" tires... I'd honestly be happier with 3.08's (and I'd have to respring for taller tires).
is this with a 5spd???
 

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Discussion Starter #7
I run a 26" tire so it looks like 3.27s or maybe a 3.08 for me. My car is basically just an overpowered street car, but with the current 3.73s first gear is so short it is basically useless.
 

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Mine has smaller twins with 3.27's & 26" tires... I'd honestly be happier with 3.08's (and I'd have to respring for taller tires).
I guess its whatever you like. The 3.08's wont perform at the track. But you or the OP may not be interested in that.
 

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I have 3.08's and a TKO and this works well to load my car at only 2,300 lbs to help it make boost. What is the weight of your car? if it is 3,000 lbs up I would go with 3.27's in the rear, the TKO and 3.08's 1st gear is a little tall for my taste and if my car had more weight I would go with 3.27's. With 3.08 gears I make 7-8 psi 1st gear, 14 in second and 20+ in 3,4 and 5th gears. Gearing makes alot of difference with your turbo set-up and the weight of the car.
 
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