I did some more research and I have come up with this solution to a 4s set up. A Neu 1506 3d, 3400 kv, geared 54 spur 18 pinion gets me to 43 mph on 3s. The new battery I am looking at is the C-Tech 5300 3s 30C, 159A continuous, 318 burst. Im just afraid that a high power 4s pack in a Jato will be way to much power and make it uncontrollable to race. Thoughts/Opinions?