Ok this is a little bit out of my reach. I was at the track tonight with some others from the site, now in weeks prior I was trapping 113-114 in the quarter. Tonight the car was a consistant 106 mph, there was a little head wind but nothing to serious, and about 70 degrees. On my way home from the track I thought about how much I was boosting, hit the gas in third and the boost only went upto 17 and then slowly climd to 19. Before it would spike 24 and settle 21-22. any ideas, boost leak? I have no idea. Oh and nothing on the car was changed for tonight.

 

I was gonna say clogged cat, however, you don't have a cat.

 

Maybe the air quality was just poor,high humidity,or whatnot.Just because it was 70 doesn't mean there was no humidity.Were your 60 ft times consistent with your other runs? Did you hit the NLS just right or did you miss just a little and let the car get out of boost?A combo of these would be reasons for your lower trap.