So I took my motor out to go pick up a new pinion gear, and I was curious as to how hot the motor would get not in the vechile, so I took it out and I was running it at like 1/4-1/2 throttle on my work bench, and It reached 165, Is that normal, I would think it should run a hell of a lot cooler not having a load on it, or was it because it had no load on it that the temp was there?
yes, running a motor with no load on it will cause it to heat up really quick! i have done it before with several motors, brushed and brushless. temps will never get too hot, but the temps rise VERY quickly.
dont ask me why/how this happens. it does seem backwards. i think it just has to do with the RPMs the motor turns with no load. even tho you had only 50% throttle, the motor was spinning much faster than if you had a load on it.
i cant say if the Xrun motor is any better than the ezrun version in the 8E's. but compared to other BL motors i have run it runs very well. considering how heavy the truck is and that its running on 4s and how fast it can go for the temps it hits(that may be a run on sentence there) it does very well.
do you have the heatsink/fan yet? mine will arrive wednesday. should bring temps down around 150. but again, most brushless motors can run 180-190 without damage.