Help my car is slow!!!

[chrisbryan800]

I've been buying up all I can to get started in 1/10th off road racing, and thought i'd made some good purchases in order to be reasonably competitive, but my car seems slow and i'm not sure why. Any ideas??

I have a rc10 b3 with stealth transmission and general upgrades. But ultimately i'm running it with a Reedy Mr 10x1 and a Novak Dually Speed Control. The gears are 81 tooth spur and 23 tooth pinion. I'm using 4200nimh's and the car seems slow like an old tamiya running a 540 stock motor. Am I missing something obvious here?