Axial yeti rock racer.

[Harleyrocker]

I got this on a trade has a lot of upgrades . It is running the axial vanguard esc and vanguard 3150kv motor . After i run it a little while the motor and esc are pretty hot. I have a 16 tooth pinion and the spur gear is a 64 tooth . Would a 14 or 15 tooth pinion be better for it. The speed is descent so i know if i drop on pinion it will be slower just more torque. Will this make it run cooler. Thanks

[CoolRunning]

New ESC is really needed if your environ isn't cold. Mine was an egg cooker. At 60A it's hugely underspec'd.

Haven't had an issue with the 3150 motor though. I think 55C is the max it's hit after a major thrash in near 40C weather.

[magic_yeti]

if running 3s it's normal that it gets hot to cock eggs. stock is fine with 2s. going down 1or 2 on pinion helps on 3s but don't really solve it. also a fan on esc and motor will help. buti would replace the esc with a mamba x .

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[Harleyrocker]

Cool thanks guys. Ill swap the esc out.

[poohsad]

Yea, I swap out for a Hobbywing Sc-8. Can be found under $60, has a fan, and capable of 4s, so it barely gets warm on 3. I find it gives much better throttle control than the stock unit, too.

I have a fan on my motor, but it's not necessary. On the hottest, most disgusting, Missouri days it gets around 120° Frankenstein.

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[DavidH]

I ran the RTR motor/esc for year, and it was still working fine when I swapped in a new combo.

I did have the 2-speed installed with the 16/64 gearing, which takes a lot of heat out of it for crawling and trail running, and eventually put a small 12v fan on the ESC and a castle fan on the motor so that the ESC would only hit its thermal cutoff when I purposely stalled the motor when climbing.

However, I did use 5" or smaller tires which would gear it down a bit.