Track prep was ok. My friend was in the other lane and had me to the 330. ran him down by the 1/8. Short burnout. Got right to the line. He has the 275/50/15 drag radials and less power and I had to run him down.
Maybe you are to fast, relasing your clutch, dear to be slow when releasing, at least 0.5 sec... Hmm, think you should see 1.65- 1.70 , at least...
12- 14 psi should be ok for your tires.