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Old 06-21-2009, 07:04 PM   #1
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Default Brushless Motor Temps

Hey guys,

Just chasing some input on what temps you guys are getting off your Brushless motors. In particular 17.5 Brushless for both Novak and LRP motors. I know it varies from different manufacturers, but what is acceptable? I'm trying to gear my TC to motor temps and so far I've had to run ridiculous FDR's (3.2) to be competitive at my track and my motor is coming off at around 70-80 C (158-176 F). At wat temps should I be concerned?

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Old 06-21-2009, 08:45 PM   #2
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Originally Posted by bee200sx View Post
Hey guys,

Just chasing some input on what temps you guys are getting off your Brushless motors. In particular 17.5 Brushless for both Novak and LRP motors. I know it varies from different manufacturers, but what is acceptable? I'm trying to gear my TC to motor temps and so far I've had to run ridiculous FDR's (3.2) to be competitive at my track and my motor is coming off at around 70-80 C (158-176 F). At wat temps should I be concerned?

Cheers
keep it around 165 and you should be just fine anything over that i would be concerned
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Old 06-22-2009, 12:50 AM   #3
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keep it around 165 and you should be just fine anything over that i would be concerned
Right, & while it may not be exactly meant for ALL brands of brushless motors, I think Novak's notice on that(found here: http://www.teamnovak.com/tech_info/i..._motor_doc.pdf ) can be a good guideline....
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Old 06-22-2009, 01:58 AM   #4
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I need to ask the silly question....sorry in advance... when using your temp gun to measure the temp's of the motor, what is the best place to take a reading from.....end of motor, or just point it at general direction of motor.
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Old 06-22-2009, 02:34 AM   #5
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If the motor has a metal end cap then you can temp it, otherwise temp the center of the can or through a vent if your motor has vents. If the motor can is silver then you need to temp it where the decal is to get a good reading.
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Old 06-22-2009, 10:33 AM   #6
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I stay around the 70 C with a max of 75 C. I use this temp with all of my motors.
GM says that the best temp is about 80 C. I don't think that's a good for most motors. The most motors can't handle to high temps and they forget that you measure the outside temp and that the inside temp is even hotter.
I have seen and heard that many motors are burnt because of to high temps.
So keep the motor cool.
Use a motor cooler as you are getting close to the 80 C.
Better a bit slower over the race than a burnt motor no finish and no motor after the race.
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Old 06-22-2009, 01:09 PM   #7
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On stock speedpassion motors i was told to temp the center of the bearings to measure the rotor temp and reference against the can temp.
Can temp of around 65 - 75 deg/c max.

When you gear longer there will be a bigger difference in temp between can and rotor. From what i have experienced rthe otor is anything from 5 to 10 deg hotter.
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Old 06-22-2009, 03:43 PM   #8
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Quote:
Originally Posted by aussierevo View Post
I need to ask the silly question....sorry in advance... when using your temp gun to measure the temp's of the motor, what is the best place to take a reading from.....end of motor, or just point it at general direction of motor.
Seems to vary with each manufacturer.

I take the gun and test all over the motor until I find the area that's hottest.
On Speed Passions etc where the endbell bearing is exposed you can see the end of the rotor in the centre of the bearing.

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Old 06-22-2009, 04:14 PM   #9
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thanks for this information guy's....very handy. I've been running mine around 60 degrees, so that is ok for me.
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