How To Choose A Modification

[tripleblack]

Originally Posted by mitch 01

I am pretty new to this performance thing. I have a 01 GT Auto with CAI, under pullies, 75mm TB and Plenum, and Flowmaster 40 catback. I don't know what to go with next, a tune to get everything working together or throw in 3.73s or what. If there is any advise out there please let me know.

Gears are one of the biggest bank-for-buck changes for these cars. I personally recommend 3.73 gears for daily driver manual tranny 99-04 stangs, but with the AOD I'd consider 4.10's as well (the auto sucks down quite a bit of power lost in the drivertrain, and the extra gears help this problem).

If you're looking to put a twin-screw blower into the car, wait. Your gearing needs for those torque-machines are closer to the stock 3.27's (maybe 3.55's if you are going to put lots of rubber under the rear).

[Buzzch46]

R3 and GT Johnny are right. 3.73's are the best for the road. They give good acceleration and yet still won't eat you out of house and home at the gas pump. 4.10s will drive your revs way over to the right, and at 3 bones/gallon, it just ain't worth it. Haven't done it on my Stang yet, but I went with 3.73's on my 71 Skylark, and a friend went with 4.10's. (Well, gas was under a bone, too. No comments on my age - LOL) Anyway, his left the line quicker for sure, but mine got me to/from college a hundred miles each way on the weekends.

[03stang]

i am in the same boat 03 gt conv stock i dont know where to start i was thinking gears 373 an a cat back or maybe just selling the car an get a 03 cobra or saleen supercharged an just leave it alone