I am running this motor http://www.gorillabobsshack.com/catalog ... cts_id=160 it is a $24 motor and a 60 Amp speed control $35 and BEC $10 on Emoli 4 cell. I can't make 5 minutes at full throtle, but with a small amount of throttle control can. It is turning the 10X4 Master right at 14,500 on the ground.