Pretty sure I found the problem,left slick had a hole in it.Tires only had about 20 passes on them.I keep my pressure at 10lbs and check them pretty close.The two straight passes were within 10 minets of each other.I then waited a hour for the last run,added 2lbs to tire that had the hole in it,thought it might be a little low because it was in the shade.Had to wait for 45 min in line and didnt check it again.Who knows where it was at on that last pass.Might explain why the first pass was bad also because of the filming wait time.I will allways have someone check tires just before I go to the burnout box in the future.