hmmm, i might drop the voltage down to 14.4 volts then. and i was thinking of gearing up a little. That way i wont peg the rpm's out on the motor unless i just do a fullspeed run. This is mainly a basher with some sprints thrown in. Right now according to a speed calc adjusted for load and resistance ill have it at 39800rpm. which is right below the mac recommended value of 40000. So, we'll see how this works lol. I'll have to dig up a couple computer fans to help it.