I went to the track a couple of months ago and I was down a half second. My buddy has this hand scanner that we hooked up and it was pulling a lot of timing out. The only thing since the tune is the 4.10's. What would cause it to do this? His brother said a stretched timing chain but it isn't making any noise.

 

What does your time slip look like?

 

When I had 3.42's and street tires I went 13.6 at 104 and now a 14.2 at 102 wit the same 60 ft. A shitty 2.2.

 

When I first got the 4.10's I would rip second off without even trying. Now it can't spin the whole way through second.

 

could be alot of things.not even related to your car. could be the heat. or humidity. or the added shift

 

Could be the headers or the 1.6 rr's making extra noise that the knock sensor is picking up. Try getting an LT4 knock module and see if that helps any if you don't already have one.

FWIW, my car was pulling timing and turned out to be partly becuase of my headers making extra noise and also a failing fuel pump. Replaced the pump and put the LT4 KM in and all is good now.

 

I do have the lt4 knock module. It is just recently the car has been running like this.