Hey im going to race indoors today on a carpet track with a lot of turns and one ~ 30 ft. straight, my spur gear is a kimbrough and is 69 tooth and 48 pitch, i have a 17 turn peak jaguar motor, and i need to know from your guys experience what kind of pinion i should use. Please help!!!

Eh, wrong board. This is for drifting, not racing. Try this.

http://www.rcuniverse.com/forum/forumid_147/tt.htm

alright, thanks a lot man, i had no idea. I went with a 28 tooth pinion for anyone who needs to know, it works great.