You cant compare your times with mine, different cars and drivers. What I learned you need to get that power to the ground. All the J @ P cars always had M and h's or slicks. Hook is everything. I'll give you 2 examples.
My 87 when i first got it. notchback, lightened it up a bit
on crappy bfg's 13.7 @ 101 not bad 2.1 60ft
borrowed friends slicks
proper burnout and told me to launch at 5000, i though he was nuts. did what he said
same car Never forget it, my first 12 sec run
12.94 @ 104 1.6 60ft
hooked like hell...