What lipos do you guys use for speed runs, I have power hobby 3s 5200 but I'm sure there better lipos out there for speed runs. There going to be used in a Felony with stock firma 150 esc and stock motor. I do have a castle mamba x8s with a 1717 1650kv motor but had issues with it and had to send it back to castle and waiting for its return. Any info would be greatly appreciated.