<< A/F is right around 13:1 until about 4750rpm, then it drops down to about 11:1 by 5400 rpm. The car's got 3.73 gears in the back, and is running on firestone firehawk SZ50 tires. they were at the full 35psi that I use them at on the street.
Drag radials are my next purchase. >>
Hey, I run the same tires on the street. When I go to the track on street tires, I lower the pressure in the rear tires to around 22 psi, and jack up the front to 40.
That gear is fine for street tires. If you get more gear without softer tires, you are just going to spin your way down the track.
Auto or stick? Try to vary your launch rpm to find the optimum point between spin and bog.