I have been hovering on the 10.000000 bubble for almost a full season. I tweaked and poked around trying to sqeeze that little bit extra out, but to no avail. Finally stepped up to a pair of Hoosier radial slicks (30x10.5RX15) from a Hoosier 29.5x10.5x15 bias slick. All I can say is WOW!
Ran a 9.98 at 134 with a 1.395 60'. That was with a corrected altitude of 3300' . Previous best was 10.004 with a 1.414 60'. Had tire pressure set to 20 psi! That took some getting used to! Plus the car drove so much smoother and more stable as well. All is not perfect though, as I did spin real bad a few times, but the track was pretty bad.
I am still pumped over it and cant wait to go out again. Dont know if I'll go through all the hassle of licensing just yet, I've spent enough money this year!!