Normally i don't jump on the motor band wagon,
we ran, i believe it was 5 mains back to back. semi/pro and money, the kid was in the car for about 4 hours.
The only cooling the motor had was when it was sitting on grid waiting to go back out with the fan on.
This motor is a 600 sealed we picked up for last years milion, the hottest it got to was just about 300, then would drop down to 280 at running.
So either we are very lucky, or there is something else to all these motors going south.
just my 2 cents
rob kuczmarski