Hi Ed, I don't have room in the fuse for a bigger battery. I am going to try a Scorpion 4025 series spinning a 13x8 prop. I agree I need to draw about 60 amps and at least 1200 watts to get the performance I need. In about a week I should have all the components I need installed in the D.B. I like experimenting because you learn a lot. It is very possible a better battery will solve the problem. I have a Zippy 3700 mah coming tomorrow. By the way, I have tried a 15x8, 15x10 , and a 16x10 will no better results so I will try another solution ie. higher kv motor and stronger battery. Skip