keliente

iTrader: (22)

I've got a 99 A4 with a 3600 stall, shift kit, cooler, headers and a cam.

Before the cam/headers, the gear seemed pretty optimal as far as crossing the traps at a good RPM. Now though it seems like it lacks a little. It has the 3.23 gears. In the 1/8th I am in third at 4900 rpms, and at the 1/4th track I am at 5500. Would it be wise to switch up to a 3.73 or a 3.90?

Ragtop 99

iTrader: (7)

3.73s with a stall are good for .1 and 1 mph in the quarter. 3.90s might get another .02 but could be worth more if you are going to run a bigger than stock tire. 3.90s are nice for NA, but if you might add spray, stay with the 3.73s.

If your traction now is borderline, 3.73s+ will push you into needing more tire.

BlackScreaminMachine

iTrader: (17)

^ Thats what I was feeling, all out 1/4 really would benefit from 3.90's. As long as you can rev the car out so your not going into 4th at the end of the 1/4

jlashley2001ss

iTrader: (5)

what about 3.42 or is that not even worth it since he already has 3.23 gears?

LS1 Eddie

iTrader: (2)

Not worth it.