That could easily be your problem.

+1 on what ghost said as well.... you could have the tune all fuxed with your new exhaust.

 

Cool thanks for all the info. so when you say "dyno tune" doI take it to my local speed shop and ask for a dyno tune?? thanks.

 

Yea, just take it to Your local shop and If they have a Dyno You should be able to go there and pay some money and have it dyno tuned and If you can put in a diablo cip and they will be able tot tune it with ur dyno run and you will most likely see a nice difference in your runs!

 

Something is different... When I was stock with 3:73's and street tires I ran a 14.59 as my best run... After I installed my exhaust and got nitto drag radials I ran a 13.744 with only a 2.1XX 60ft...

 

I would loose the slicks on a stock rear, what mods do you have, cause if u just have exhaust and a few bolt on , and if ur running a large size slick u may be ******* yourself a little, try a pair of drag radials

 

You can use Diablo or SCT, I have diablo, just because thats what I heard was the best when I got mine installed, I have heard good things about SCT, look into either of them

 

Ya ill look into it.I take it next week to get a dyno tune. hope it makes a diff. thanks.

 

When I installed my LT I gained 3 tenths in the eighth. You said it was 90 degrees out. That could make a diffrence in what your car ran the time before. If you had better conditions with the other runs thelast time at the trackThat could make a diffrence. Thats just something else to consider

 

Well the next timeI take it to the track it will have a dyno tune and it should be much cooler at the end of sept. so ill let you guys know howI did.