well i think i solved my motor overheating problem. installed a reedy sonic 5.5 550 motor. and dropped it down to a 12T pinion. ran is outside in a parking lot for 20 minutes pretty hard and the motor only got up to about 110 degrees. i'm impressed how much cooler this reedy runs than the lrp. i guess the real test will be when my son runs a few 6500 packs in it at the track tomorrow...

i still have no idea how the lrp burned up with a 13t pinion... luckily associated is fixing it for free!