[RACER X #99]

John,
One idea, you may want to go for a set of slicks for the track. Most of the guys running slicks on their Cobras are running Goodyear bias ply stock car tires. Available from Roger Krause racing. Realitively cheap about $100.00 each and are a lot more forgiving than Radials. They are real forgiving for us beginners in that you can slide the car around the corners much easier than Radials which offer better grip until you go over the edge than they offer zero grip.
Ask the other "racers" for their tire opinions.

Good luck,
Cranky