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GM3 Comm problems

GM3 Comm problems

Old 08-20-2001, 05:42 PM
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Jeff - heh... True!
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Old 08-20-2001, 06:29 PM
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I like my GM3 for off-road, cause it seems smoother. For on-road, I like my P2K. AE Racer, yeah, the Fantom P2K's are not bad, I had one that flew!
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Old 08-20-2001, 06:43 PM
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Anybody run a Rage much? I'd like to get a high RPM motor for my 1/12, but if GM3's are allmost a hazard, I'd like to find another choice. What about the TOP motors? Any of them high RPM? I'm doing allright with a P2K in it, but I really think a higher RPM motor would help.
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Old 08-20-2001, 06:50 PM
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the Rage is ok, but I still say try another GM3 or get a P2K
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Old 08-20-2001, 06:53 PM
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Right now I've got 4 P2K's, 2 MVP's, and 1 junk GM3. I suppose I could try slotted or cavity brushes in a P2K or MVP to get more RPM... Should probably try that instead.
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Old 08-20-2001, 07:39 PM
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Originally posted by JeffC
Anybody run a Rage much? I'd like to get a high RPM motor for my 1/12, but if GM3's are allmost a hazard, I'd like to find another choice. What about the TOP motors? Any of them high RPM? I'm doing allright with a P2K in it, but I really think a higher RPM motor would help.
I ran a Rage for a good part of last summer. I'd have to agree with others who have said it's a very high revving motor, but it is not very torquey. For a touring car gearing would be critical, but in a 1/12 car I think it would be pretty nice.

My Rage was happiest with BRP Silver Hollow Laydown brushes, and either the springs that came with it or a Trinity Red on pos and Green on neg. For 1/12 I'd probably go with the Red/Green combo.

One thing about the BRP Silver Hollow brushes... You need to really make sure they're fully seated to the comm before they start making power. The usual three to five minute break in won't get the job done. I use a brush contouring tool to face the brush, then a few minutes of break in. Without the contouring tool, you couls spend 10 to 15 minutes breaking those brushes in. On the plus side, one set usually lasts me the life of the motor, unless I go really crazy with the gearing.

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Old 08-20-2001, 08:49 PM
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i love my gm3s....you must be carful when gearing, troys was just bad, cause he was geared like i was, as for fantom, they put out a great product, in our area a trinity pro, and a fantom are the same price, and i would take th fantom every time...
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Old 08-20-2001, 08:55 PM
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I like the fantom P2K's, they rock, but the GM3's, in my experience aren't very good. At least they aren't true to the dyno numbers...
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Old 08-20-2001, 09:04 PM
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why would they be honest with the p2k and not with the gm3....
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Old 08-20-2001, 09:07 PM
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I have no clue why mine went poof... It makes a cool video though! Oh well, another $13 down the drain for a new arm.
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Old 08-20-2001, 09:11 PM
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Hey troy, How can I get the video?
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Old 08-20-2001, 09:12 PM
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I think the brushes they put on the P2K are better, cause when I fired up my fantom GM3 with the stock brushes, it was crap. I put some niftech X-cuts on and performance went up alot. Plus, due to the reduced surface area of the X-cuts, the motor doesn't get as hot, and the brushes are softer, for longer comm life.

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Old 08-20-2001, 09:16 PM
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they put f315s in the p2k and gm3, which is basically a 767...i found that most of the time my motors run best with those or the team one 4140...so i think you are just mistaken...ha ha
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Old 08-20-2001, 09:22 PM
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Originally posted by TSR6
I have no clue why mine went poof... It makes a cool video though! Oh well, another $13 down the drain for a new arm.
If the only thing that goes POOOF is the motor then that's cool but your ESC can also go...
A few weekends ago I geared my Banzai GM3 at 85/29 (5.86) on my schumacher axis, the whole time I was waiting for that magic white puuuuffff of smoke. It never happened and I ran it twice back to back. I think that some of the comms just came defective from the factory and you either got a good one or you got the ones that go poof.
BTW, that race was at night on a wide open track
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Old 08-20-2001, 09:25 PM
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Originally posted by Speedo
I think the brushes they put on the P2K are better, cause when I fired up my fantom GM3 with the stock brushes, it was crap. I put some niftech X-cuts on and performance went up alot. Plus, due to the reduced surface area of the X-cuts, the motor doesn't get as hot, and the brushes are softer, for longer comm life.

Speedo
Speedo - how are those x-cuts working out for you?? I tried some but they were breaking and jamming my motors. Are the niftech brushes any good? What kind of power are you getting compared to the other brushes? Thanks
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