[Si Coe]

Well its a bit more complex than that. I've been running one for ages in my B4 with a 7.5 motor and not had a problem, but then I tried it in my old Cat'98 I use for indoor racing and it wouldn't run for 3 minutes without overheating.

The problem with the Cat, one you will also have with your Durga is that the ESC sits literally right next to the motor. Which means all the heat the motor pumps out goes to the esc, and vice versa. They effectively overheat each other.

In part I solved the problem by fitting a heatsink with fan to the motor, cooling that, another fan to the esc and fitted the receiver between the two as a buffer. Its not perfect as its still runs warm, but it doesn't get hot enough to shut down in a 5 minute race at least.


So the esc can handle motors lower than 10.5, right down to 7.5 for sure, but only with adequate cooling and the right location. I suspect the revised 10.5 limit is due to too many complaints just like yours and mine, which are more car specific. Its 10.5 in a Durga or an old Cat, but 6.5 in a 2wd!