1515 2200kv heat issues in buggy

[nuz69]

Hello
There is an issue indeed, my mp7.5 with 14/46 ratio and 1515 2200Kv on 4S barely breaks 100-105°F... If you have the same problem with different motors and ESC it comes from somewhere in the vehicle. Is your motor mount correctly installed ? There is black plastic under the motor, maybe it strains your motor ?? Give us some closed photos so we can see if the motor is well installed.
Or like you said maybe your temp gun, so measure the temp with your friends temp gun.

[KniteWulfe]

Last weekend I took the readings with my friend's temp gun and it was at 175 on the end-bell and 150-155 on the sides. Ambient temp was 75 and windy. Better, but the lower ambient temp I'm sure had something to do with it. The weekend before, track temps were like 120 degrees.

I was under the same assumption, that the vehicle was the issue, but I cannot find any binding at all, it is very smooth. When I let off the throttle it coasts as easily as can be expected from a notchy 4-pole motor. I am going through the drive-train and rebuilding though just as a precaution. My motor mount is installed properly, and I put a piece of foam rubber on the black plastic thing to cradle the motor better.

As I was typing this I was inspecting the mount and the black plastic brace thing. I pulled the motor and noticed quite a bit of wear on the underside of the end of the can, it looks like the brace was doing nothing for the motor and it was slapping the chassis. I wonder if you are on to something and the pinion is binding under flex causing added heat. I'll test the motor in another vehicle this weekend and see how it temps with the same gearing. It would have to be something that only happens under throttle or under flex causing binding if the car is the issue.

[nuz69]

Anyway I don't like the kyosho 2 pieces mount, I replaced it with the RCMonster one, and the spur is far better close to the motor, meaning less strain on the front bearing. But with the kyosho mount I had'nt this kind of high temps. There is probably something with the motor mount