I just installed an XERUN 80A 1/8 esc in my 4x4 SCT with a Novak 4.5 HV 550 and its stuttering when I apply full throttle. If I gradually apply it seems ok, I am using Venom 5000 20c and pro-tech 3200 25c batteries. When I used the same combo with my Novak GTB esc I had no problems at all. I have the program box, is there something else I need to change?