Went to the track today and the best I pulled on the motor was a 13.7@103, on the bottle I went 13.4@110. Previously the car went 13.4 at 107 consistently, on the motor, that was with a stock tune and rev limiter. I added a PCMforless tune and I shift at about 6200rpm. The car seems to be going rich up top, but I'm at a loss as to why it is so slow now. I'm doing a compression/leak down test this week, and I'm order LT1edit ASAP. Anybody got any other ideas? I also trashed my rear today, so I think it's time for 12 bolt.

 

what was the pressure in the tank?

 

1200 psi in bottle, 38-43 psi for fuel.

 

did you get a nitrous tune also or just N/A and you changed the fuel settings on your own?

 

Maybe it was just a traction problem.

 

Check the tempatures of your exhaust primary's.
could be an exhaust valve problem.

 

Did you pull your plugs and check them? Maybe you burned a plug on the spray? Burned wire? Does the car seem to run smooth, but it's just down on power?

Are the only changes programming? If so, I'd look there for the problem.

 

Programing was the only major change. PLugs and wires are brand new, car runs fine, really smooth, just down on power.