TS6

iTrader: (41)

I just got my 12 bolt this summer with 3.73's and am thinking of going with a D1SC and built motor with ported heads and properly sized cam, thinking 600 rwhp roughly. I have a built 4L60E and can run 28" tires if need be. Will the 3.73's be too much? Its primarily a street car but I like to go to the track when I can.

2000 Tran Zam

iTrader: (2)

id say bigger gears actually would probably work better with a blower.

only reason for that is when you have a blower, typically you reach full boost the higher the rpms. the faster you rip through gears, the faster you should reach that RPM.

If it is a turbo, thats different. It creates a different kind of load making the turbo need to spool.

So if you dont have enough time to let the turbo spool up, its not matched up properly and is wasting part of it.

Please correct me if im wrong.

STALL UP

iTrader: (2)

I have a pisc-1 8-9psi with 3.73 and a 3000 stall and love it

Urban Legend

iTrader: (5)

3.73 gears have worked great for me. Redline set at 6200 rpms.

Bankz27

I would try out the car with the 3.73s and if you feel that you are going through the gears too quickly then change them to 3.42s or 3.23s depending on how you feel.

RedSuperSport

Ya i agree with stall up the ps-1c is a better supercharger that is also from procharger thats what i got

Wicked_Hugger99

iTrader: (1)

i ran 4.10s on my old vortech YSI setup w/ no probs. Me thinks 3.73s will be just fine for ya in an A4 but, as mentioned above, if they're not then drop down

SStolen

iTrader: (22)

What about in a T-56?

Pro Stock John

iTrader: (34)

600rwhp, 4l60e, 3.73's, blower setup, no big deal. Should work okay.

TrakDay

iTrader: (7)

My 3.73s are on the way. It was that or 3.91 and 3.91 would put me in 5th gear which is an extra shift...

BudH

iTrader: (3)

Unless you run taller tires, you will run out of gear in 3rd gear! Go with 3.42s!

kp

iTrader: (34)

I have a 3.70/28" tires. 6600rpm going through the traps @ 138mph.

You should be fine..