I've had my car to the track twice now and I'm confused. My launch is terrible(60'= 2.45- 3.57) and for some reason my trap speed is always 86mph. Even on my 17.22

I trapped 86. 16 flat, I trapped 86. 15.7, I trapped 86. Is my car falling on its face after the shift to fourth gear? Am I doing something wrong? I'm lost.
-R-