Cool , I see your in Austin. Do you race at the hobbytown?
Anyways, start at a 39 and go up from there. On the track I race at I just put my 414 back on the track and with a 39 tooth pinion and 128 spur i was able to keep up with the other drivers on the straight. But I could have used alittle more top end.... This was with a putnam chameleon.