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Old 04-14-2008, 01:02 AM   #1
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Default Motor Temperature?

Just wondering what everyone's thoughts are on maximum motor temperature. How hot is too hot? I check my motor temperature from time to time with an infrared thermometer but its not very helpful when I don't have an optimum temperature to go by.
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Old 04-14-2008, 01:08 AM   #2
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If I may add, can also someone include run times with what setups and how long of cooling time in between your practice runs or just having fun?

Good question quick5pnt0 this was just on my mind but was wanting a bit more info.


So lets hear them temps
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Old 04-14-2008, 01:42 AM   #3
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70' C is HOT.......don't ever reach that number...
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Old 04-14-2008, 02:01 AM   #4
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Depends on the application

Mod <80C
Stock 60-70C
Bashing <60C
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Old 04-14-2008, 06:14 AM   #5
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160 f degree is high. my batteries can't even feed enough amp to get it moving when it gets that hot. the lower temp you run the motor the better performance it gets. that's how electrick works.
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Old 04-14-2008, 06:39 AM   #6
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Nobody's asked this, are you running a Brushed or Brushless motor???

I think everyone is assuming Brushless, but would be good to know.
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Old 04-14-2008, 08:43 AM   #7
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my hot water pump's bushless can handle 333 f degree from its spec
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Old 04-14-2008, 08:51 AM   #8
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I race outdoors so when the outside temp is a little over 90 and the track temp is over 120degrees it will be hard to keep the motor temps under 160..

I had a high of 179 this weekend running a final drive of 4.6 on a 13.5 novak.

I usually run my motors closer to 160 with a final drive of 4.4 on cooler days...
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Old 04-14-2008, 08:51 AM   #9
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...double post
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Old 04-14-2008, 10:35 AM   #10
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Quote:
Originally Posted by kn7671 View Post
Nobody's asked this, are you running a Brushed or Brushless motor???
I was speaking of brushed, but I'd like to hear about both.

Also where are you taking your temp readings from? The can? The endbell?
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Old 04-14-2008, 12:25 PM   #11
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Quote:
Originally Posted by quick5pnt0 View Post
I was speaking of brushed, but I'd like to hear about both.

Also where are you taking your temp readings from? The can? The endbell?
Brushed motors normally come off in between 180F to 220F. Obviously, the lower temperature you can maintain, the better. In hot conditions (over 90F), it is pretty important to run a fan or two along with a heatsink to keep the motors in check. These items will also assist in cooling the motors off quicker once the race is over. In other words, don't let your motors just sit and bake once they come off the track, if possible.

As for where to check the temps, the hottest reading you can find with your temp gun. I usually rely on the temp gun "Highest" reading value, which allows you to move the temp gun all around the motor, and then get the highest reading.
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Old 04-14-2008, 02:55 PM   #12
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What if/any damage could occur over 220F on a 27T stock motor?

..... mine got hot during this weekend....
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Old 04-14-2008, 07:07 PM   #13
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220 in stock pretty much = fried motor, i race stock brushed and im running a blue can, i have it from 145 to 165, but keep in mind i race asphalt outdoors so temps will very with the diffrent seasons. but me personoly i wouldnt run it a stock brushed past 180. that is the limit but for me i try to stay under 170.

hope that helps
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Old 04-14-2008, 09:32 PM   #14
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Quote:
Originally Posted by SantozRey View Post
What if/any damage could occur over 220F on a 27T stock motor?

..... mine got hot during this weekend....
You'll ruin the brushes. Check them after a big temp, and they'll be discoloured blue/purple at the contact ends. They then don't conduct very well at all, and should be replaced.
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Old 04-15-2008, 06:06 AM   #15
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You will probably ruin a lot more than just the brushes. The com copper will also discolor, both brushes and the com will harden. The winds will get darker, which is the lacquer starting to burn off. If this condition persists will lead to shorted stacks. Over heating will also weaken the magnets, as will any heat, really.

Heat is really a bad enemy to any electronic component. 165 should really be the highest temp that any stock brushed motor sees.
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