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Old 07-23-2008, 10:46 PM   #1
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Default Putting ice on motors?

I was looking thru the RC Motor Black Book and this guy asked does water affect the motors? And he said no, as a matter of fact you could put ice on your motor to cool it down. Motors run better hot. So does this mean when my motor is hot i can put a ice cube or 2 to cool it off? Will it do anything to the comm if I just got it lubed or will anything bad happen it it?
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Old 07-23-2008, 10:53 PM   #2
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someone told Water does not harm the motor
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Old 07-23-2008, 11:03 PM   #3
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Ice and or water will not harm a motor as far as operation goes. If the motor has bearings in it you need to hit them with a lil WD-40 and then some oil. In fact the old school way of getting performance out of closed end bell motors is to bake them at a high temp in an oven and then drop them in a bucket of ice water and run it for about 10 minutes at around 3-4 volts while it is in the ice water.

Back in my motor experimental days I used to keep stock motors in a cooler full of ice and only put them in right before the heat started just to see if I could see a difference. The motors were definitely stronger throughout the duration of the heat.
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Old 07-23-2008, 11:11 PM   #4
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They make motor coolers now so you don't have to spend money on ice every weekend.

http://www.ampdraw.com/product.php?u...productid=1968

This is also why you see a lot of fans in the pits, you can also throw your car on a fan after your heat to cool it down.
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Old 07-23-2008, 11:12 PM   #5
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My stock motor, Trinity P2K2 to my knowedge doesnt have bearings because it is a stock motor, correct? I was thinking that it might hurt the brushes or comm or armature. So how much performance gain did you get?
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Old 07-23-2008, 11:13 PM   #6
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Quote:
Originally Posted by Wes Briscoe View Post
They make motor coolers now so you don't have to spend money on ice every weekend.

http://www.ampdraw.com/product.php?u...productid=1968
For $66 ice will work just fine!!!!!!! Plus, all I use to make ice is fill up ice cube trays in my sink.
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Old 07-23-2008, 11:15 PM   #7
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I'd be worried about cracking magnets by throwing a hot motor on ice.

But other than that, you should be fine.
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Old 07-23-2008, 11:16 PM   #8
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My stock motor, Trinity P2K2 to my knowedge doesnt have bearings because it is a stock motor, correct? I was thinking that it might hurt the brushes or comm or armature. So how much performance gain did you get?
Your motor has bushing so no worries there although you should be putting a couple of drops of oil on the bushings every couple of runs at a minimum.

It's been a long time since I ran a brushed stock motor but if I remember correctly at the end of a 5 minute heat the motor was about 30 degrees cooler than normal and the first couple of laps there was a lot more torque.

I also did many other things to my motors so your results may vary but I can assure you it won't make you any slower.
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Old 07-23-2008, 11:21 PM   #9
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Can I have a link for bushing oil?

And where do I put the oil?
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Old 07-23-2008, 11:27 PM   #10
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Can I have a link for bushing oil?

And where do I put the oil?
Here's one. There are many available.

http://www3.towerhobbies.com/cgi-bin...?&I=LXDA93&P=7


You can leave the motor assembled and at each end of the motor where you see the shaft running through the bushings squirt a few drops and then rotate the motor several times by hand or hook up and run.

For a more thorough job disassemble the motor and place oil on each bushing and each part of the shaft and then put the motor back together and spin several times.
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Old 07-24-2008, 12:58 AM   #11
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I used to break my motors in by hooking them up to a 4 cell pack and then droping them in a cup of water.
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Old 07-24-2008, 01:10 AM   #12
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Default Talk about old school!

Wow... i remember back like 15 years or so ago we used to break motors in a cup of water.. what this did was to help the brushes conform to the shape of the commutator quickly. The brushes we had back then were fairly crappy compared to what we have now.

As for ice.. well.. brushed electric motors do run better when cooler.. You can run taller gearing for more speed. The hotter they get the more resistance you get.. you will pull more power from a battery (not too much of a concern these days.. unlike the 1200mah we ran back in the day) and with more heat your brushes will wear faster too... for all the hassle you really don't get much out of it.. You would do better making sure your tires are clean everything else is in working order.. inspect your brushes (on a brushed motor)... etc..

Have fun!

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Old 07-24-2008, 01:30 AM   #13
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In addition to the wire resistance increasing with temperature, he motor magnets get weaker as temperature increases. So heat is bad for a motor's performance overall.
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Old 07-24-2008, 09:25 AM   #14
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Even better, I remember at a national race, TC I think, someone had a modified heat sink that allowed them to load ice into it and kept the motor cool. In this case, they used DRY ICE to keep the motor cool. It worked well and that car ran super cool. Motor was barely warm iirc.


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Old 07-24-2008, 11:09 AM   #15
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So would a make a difference with dry ice and normal ice?
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