First off are you using the kit tires? The V-rage?
IF YES???? GET RID OF THEM.
Seriously. If your running them you will go no where fast.
Get a set of foam tires or if your club does not allow them(shame on them) get some proper racing rubber tires. The v-rage i have yet too in competative use nitro or electric..
Mine are sitting on my pit table in the original bag.
On top of this if your using a 1hp + motor rubber tires are going to be very hard to keep traction with.