Update:

We switched to a 12t pinion gear. It ran pretty well and did not cut out as much or as early but it did thermal out. We then removed the BEC jumper and hooked up a 4 cell AA pack battery holder for the receiver. Now, it runs pretty fast and does not thermal out. This is with 103 degree outside temp, running on hot pavement, and several full speeed runs. The motor and ESC were pretty hot but did not melt any6thing this time. They cooled off pretty quickly after the run.

I think I'll order one of the motor heatsinks and maybe a 10t pinion to try also. I'm going to make a mount to get the esc higher up in the chassis for better airflow across it. Now I have to decide whether to go UBEC or reciver pack. I'll post up a seperate thread to ask opinions on that.

Chris

BTW - thanks Mike, that was very quick shipping. Ordered it Friday, got it yesterday (monday)