Here's mine:
Mamba Monster V3
Zippy 4S Flightmax 5000 mah 25C
CC 2200kv
62t spur
14t pinion
Servo: Hobby City HXT12K ($8.00)
http://www.hobbycity.com/hobbycity/s..._10kg_/_.16sec
Tires: Crimefighters
Runtime: Track ~20 min
Bashing ~25 min
Temps: I haven't bothered because everything feels like it is less that 100 degrees
Other things that I have tried:
13t pinion. I felt like I never got a good mesh with this pinion. It would always clack when I used the brakes. It seems that pinions with higher tooth counts mesh better. I would really like to try a 16 tooth pinion with this combo. I've found that with higher tooth counts I tend to get better acceleration because the torque does not hit the wheels so hard causing spin (thus less acceleration). I will say that if unlimited traction were available, lower gearing would produce faster acceleration, but in the real world where I can spin my tires at will even on pavement, higher gearing gives me better acceleration.
I also was using a Hobby City 9xl until it froze up. I was happy with this motor, the temps stayed low, and the power was good. I would use one again, but I think it is better for the long run to just go with the CC motor and forget about it.