When my car was stock except for exhaust(2007,5-speed,3.31 rear end) I took it to test and tune at the local 1/4 mile track. I had a friend with a 99 LS1 Trans Am who wanted to race me. He ran a consistant 13.6/13.7 all night stock and I couldn't go any faster than a 14.1. I tried running 7 times with different launches and nothing would change. At the time I had a loaner Hypertech from one of my vendors. I decided to challange him again on a back road Sunday. I now have just a MMR CAI and a Diablosport with a 93 perf. B@ma tune. We raced 3 times, 2 times from a roll (20mph) and once from a stop. I pulled on him EVERY time up until 120mph where we let off! He didn't even stand a chance. I will be running at the track again Sat. and will post my numbers. Just wanted to say thanks to everyone on here for the advice on doing the CAI/TUNE as the first mod. Also would like to tell everyonethat the mail order tunes from Doug are worth every penny.

 

Have you considered changing out those 3.31 gears?

 

Yes, it is one of the next things on my list. I plan on doing going to a 3.73 to keep it fair on gas. I travel alot. I already have 16k miles on it!

 

with your cai + tune, it looks like a pretty
close matchup....nice kills



320 horsepower and 335 lb-ft of torque.
0 to 60 mph 5.1 sec
1/4 mile (E.T.) 13.4 sec

 

1+ and change the rear gear and you will have a beast for relatively little modding money!

 

I know I read somewhere that the 07 GT was a heavier car that 05 and 06. Some people write that they had stock times of 13.7-13.9. I thought still I could do better than a 14.1. Hell, my 88 lx 5.0 did that stock. About the rear end gears, I heard from somewhere that FRPP and Motive are the same and then I also heard they are not. Has this been put to a close yet? The FRPP are only $20 higher