For some the Reduce RPM setting is a solution. For me the reduce RPM setting reduced the RPMs even with a full pack. I had good punch, but little top end power. On cut off it would do just that and cut off on anything over around 1/3 throttle. Race mode seemed to give full power, though I never actually got to drive the truck in this mode. I only tested race mode while holding the truck off the ground. In race mode I got about 3000 more peak rpm versus the other modes.