[lincpimp]

I run a 2000kv aveox motor that should be almost identical to a 1512 neu. My revo has the full tekno kit and I run 5s lipo. Gearing is 15/40, and I have the wide ratio gearset. Truck does almost 45mph, and has tons of power. I do have 2 clip on heatsinks, and temps are fine.

If you will lock it in second, and use motor brake the 1515 will be needed. With the 2 speed and gearing for around 40mph and mech brakes a 1512 (1800-2000kv ) on 5-6s should be fine. For 4s running you will need some really good lipos, and lower gearing with the 3000kv motor.