Went to the drag track with 01 cobra. I have bbk cold air and bbk off road exhaust with 5 speed and 327 gear. I ran a 9.20 at 78.41. I have a tune and a sctx4 but think I should have been faster. Car has 41000 miles and I have a .0655 reaction and 2.1577 60 ft and 6.0768 300 ft. Any thoughts on this