Originally posted by Entropy
I don't think so, but the weather is warm where I live (can get 30+ degrees celcius) in the day and I've personally seen some thermal shutdown cases in open races here. Even with fans on the ESC and BL.
I do have a Novak BL at my disposal should it be needed...
There certainly was that at the Tamiya enduro I heard. I don't know enough about brushless but I imagine that they should run cooler without the brush and give you longer run time.