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Old 07-07-2008, 08:51 AM   #1
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Default motor coolers and brushless motors

does anyone to this to their brushless motors? or should a fan just be on the motor ?
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Old 07-07-2008, 09:08 AM   #2
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Originally Posted by josh short View Post
does anyone to this to their brushless motors? or should a fan just be on the motor ?
I know that chilling a Brushed motor will help it a little, because when the magnets get hot, they lose a little strength.

Possibly you could assume the same for a BL motor. If you keep its rotor cool, it wont lose magnetism.

I havent tried it, but it might help a little if you've got a larger pinion than a spur!
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Old 07-07-2008, 09:48 AM   #3
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I played a little with a motor cooler in 12th. It seems to help a little up front but the motor still reaches the same temp by the end of the run.

I had better luck with a clamp-on heatsink and a fan because it actually reduces the motor temp for the entire run.

With a bit of dremel work you can rout the novak heatsink around the axle of a 12th car and put a fan on it. Makes a big difference in 17.5.
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Old 07-07-2008, 12:38 PM   #4
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I have to agree with the use of a motor cooler being only good for the initial part of your race as my experience also showed that the motor still hit the same temps at the end of the run.

More recently I have ditched the motor cooler and fans on the motor and am finding performance no different. I think its best to understand the temps of your motor (brushed or brushless) and how gearing affects this.

Coolers and fans could skew these results and could possibly lead to a situation where your fan dies mid-run and all of a sudden your motor hits its threshold temp and burns out

Fans also add weight to your car

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