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Maximum Safe Temp

Maximum Safe Temp

Old 06-16-2004, 08:41 AM
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Default Maximum Safe Temp

Does anyone have a ballpark figure for the maximum safe temperature for an electric motor at the end of a run? I've been going by the "if it burns my finger, then it's too hot" method, but I'd like to get more precise than that with a temp gauge.
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Old 06-16-2004, 11:28 AM
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Around 120 deg.
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Old 06-16-2004, 12:10 PM
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for GP
idle 90 deg.
running 120 deg

EP eh.... as long as i can get 5 minutes without the battery dumb that will do..

Last edited by rcsabah; 06-16-2004 at 12:15 PM.
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Old 06-16-2004, 12:14 PM
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no way, you can push those motors much more than 120. Measure at the end of the brush, right where the shunt comes out. right there it should be about 180-190MAX for stock, and about 180MAX for mod. There really isnt a point in measuring on the can, because you are worried about the brush burning up and the comm, not a chuck of metal, lol.
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Old 06-16-2004, 12:18 PM
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yah agreed with u maintain the speed and runtime that will do
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Old 06-16-2004, 04:23 PM
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I run stockers at about 150, a 12 turn at around 175, a 10 at 185, and 7 around 210. (Heat taken when i get back to the pits) The 210 is really pushing it and i usually have to dun a fan to keep it from unsoldering.
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Old 06-16-2004, 10:31 PM
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mine equiped with a fan blowing the end bell
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Old 06-16-2004, 10:57 PM
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I think the hottest I've ever got with my stocks is 200 ish, then it blew. But on any given race day, I'm running between 150-175 on the hoods. I'm not worried too much about heat. You know you're too hot if you're getting soft before the end of the race or if your brushes change color.
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Old 06-17-2004, 02:00 AM
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i sometimes get concerened about the temparature of my stock motor, orion core. So as long as the brushes do not burn blue is it ok?
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Old 06-17-2004, 07:21 AM
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ya, especially on a stock, the brushes shouldnt change colors through a 5 min run, at least they shouldnt in normal track and race conditions (you, of course, could be running in Death Valley like conditions, )
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Old 06-17-2004, 08:18 AM
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Yeah, see i'm running on an outdoor asphalt track in the middle of the desert. A typical high during the summer here is in the 110-115 range. I'm running a xxxs, so the motor is right next to the asphalt, which already gets extremely hot. I'm seriously considering one of those new Reedy fans. I've heard they work really well.

So what's a good, reasonably priced temp gauge? Nothing too fancy, just something that I can use to take accurate measurements.
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Old 06-17-2004, 09:02 AM
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I have heard that some new duratrax one for like 30-40 dollars is decent, although I have not tried it. I would do some research and look for a Sunon (the brand) Coreless 5V 40mmx40mm fan. They are the best. I would tell you where I found where you can buy them, but I lost all of my notes, lol.
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Old 06-17-2004, 09:36 AM
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You know, the main reason mod motors don't generate as much heat as a stock has a lot to do with the brush-comm configureation. Mod motors have standup brushes which allow for less brush overlap. Stock motors have laydown and thusly have increased overlap....especially when the comm gets small. So, to combat against that, on a stock motor, you can narrow the face of the brush by a little bit. Shave a little bit off of each side of the brush and physically narrow the face. That way you reduce the overlap and lower overall temperature. It also increases efficiency will make your motor run longer.
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Old 06-17-2004, 03:01 PM
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what's the best place of the motor to make the temp measurement????
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Old 06-17-2004, 04:37 PM
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as I stated in a few posts above...right behind the brush, where the shunt comes out.
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