which BL motor should I use (3 choices)

[SpEEdyBL]

I would get a 4.5 version orion motors you were thinking of or even better, a tekin redline sensored motor or a novak motor which have ribbed cans for even better heat disapation. Castle creations and similar motors have wide rotors and will lack the snap that the motors I suggested have. Has anyone ever tried a neu 1506 in a 1/10 touring car? Efficient yes, but not something I would spend nearly 200 bucks on since it doesn't even have solder tabs and may not even fit in your car because of the wider diameter. I haven't heard of any heat problems even with novaks 3.5 and 4.5 motors.