hi,
I've seen that motor in action last weekend, here in Hamburg/Germany. In the beginning, the motor got quite hot (about 80 deg. c), after that I've cut a big hole in the shell, and I think the fan on the motor didn't work first.
later the motor was - like that - around the 50 deg. C/122f (or a bit more), but not really dangerously hot.
the car was pretty fast. The motor has a small magnet, therefore it needs high rpm.
the new esc stayed cool all the time, pretty good for such a small esc.
there's a mod on the motor to keep it cool, put some thermal lube on the inner side of the motor like that:
http://www.offroad-cult.org/Board/zu...mitgebaut.html
it's in German, but you only have to look at the pics...
florian