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Old 11-13-2003, 03:36 PM   #1
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Default tc3 gearing?

ok i need some help. i have an electric tc3 and i am running an monster pro stock motor with a 27 tooth pinion gear and a 72 tooth spur gear. i was running and the motor started to smoke, i didn't even get to finish the battery pack this have happen twice to me. is the gearing wrong? can i get some help?
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Old 11-13-2003, 03:38 PM   #2
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That gearing is fine, what my guess would be is that its a bad motor, have a look at the brushes and see if they are burnt or rebuild the motor and see if you can spot anything. If you get stuck or arnt sure, ask on here and if you want add a picture so we can all see.
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Old 11-13-2003, 03:47 PM   #3
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I've never run larger than a 25 tooth pinion on my TC3 with the monstor stock. I would try starting with a 24 pinion, I think you will find that you really don't lose that much top end and you'll have alot more punch off the turns.
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Old 11-13-2003, 03:51 PM   #4
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well just to let you guy known this only happen when i run the monster pro stock motor. when i run other motor this dosen't happen so i am guessing it the gearing?
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Old 11-13-2003, 05:09 PM   #5
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Quote:
Originally posted by mrredrsx02
well just to let you guy known this only happen when i run the monster pro stock motor. when i run other motor this dosen't happen so i am guessing it the gearing?
I do have a tc3 and the same thing happened to me ,, ( i burn alot of stuff but im getting better).. anyway gear down 1 tooth on the pin,, it worked for me the MS has alot of tq so let it run that way .. try 24 or 25 pin the if the motor is ok go up to 26 and chk heat of the motor... you should be fine some MS motors need to be geared at least 2 lower on the pin..
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Old 11-13-2003, 05:10 PM   #6
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Yer that's a 6.6 OGR, try a 7.0-7.2 with a monster. Like berger said it could be a bad motor or poor maintance habits.

Most torque stock motors(Mvp/Core stock) like around a 6.5 OGR but the monster(rpm based) likes around a 7.0-7.2(in most cases).

Do a complete re-build, cut, brush change..... but if you've smoked a motor it will never perform as well as it did before.
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Old 11-13-2003, 05:24 PM   #7
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Gearing depends on the size of the track, the traction that is available, the springs, and what brushes are on the motor.
When you run the 27 on the Monster, you are at an overall gearing of 6.667.
With a 26 on the car, you are running an overall of 6.92
With a 25 on the car, you are running an overall of 7.2
And a 24 on the car will give you an overall of 7.5
When you run a 27, the track should be HUGE.
Possibally why you smoked the Monster Pro, is because the Pro is said to have higher rpm than the standard Monster
At my home track, I run the Monster at an overall of between 6.9 and 7.5, depending on my brush/spring combo.
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Old 11-13-2003, 06:14 PM   #8
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i always ask bubbles what to gear at so i'd listen to him
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Old 11-13-2003, 06:29 PM   #9
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I've been gearing my monster stock with a 28 tooth spur for the last few races that I've been in, and it's been doing great. I run heavier than normal brushes (purples) and Reedy 767 brushes on my motor. The motor is definately hot after a 5 minute run, but I've run 6-7 quals and 3 mains with that gearing so far, and have yet to burn the motor up. I'd be curious to see what your spring tension is, as I beleive that the heavier springs will pass more current (due to less arcing) and provide more of a tourqey motor. This is just my experience, and I haven't been racing long, so take it with a pound and a half of salt

-Matt
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Old 11-13-2003, 07:37 PM   #10
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140x70 high grip asphalt track and everyone here is running 25 teeth on motor, we did burn up 2 monsters with 27's on them. Fatdoggy is right I tried to save the armatures, but decided just to replace them and start over. The both of them are alive and well and smoke free now.
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Old 11-14-2003, 12:45 AM   #11
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Hey All,

What cells are you using?

With GP3300's you have to be easy on the throttle because of the punch they have. I had the same problem some time ago.

Try lowering the punch from your transmitter or speedo.

Hope this helps.
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Old 11-14-2003, 11:00 AM   #12
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Default 64P gears

Is anybody running 64P gears on a TC3? (smooth carpet track-no bumps...well, hardly no bumps)
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Old 11-14-2003, 02:47 PM   #13
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hey i was wondering why is it seem like my motor get hotter when i use the heat sink. isn't the heat sink suppose to keep the motor kooller?//
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Old 11-14-2003, 03:38 PM   #14
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The heatsink is supose to have an amount of airflow over it, to disapate heat. When under the body, there is less airflow, keeping the heat in or around the heatsink. Another thing to consider when running a heatsink are the holes that you block on the motor that are for airflow THROUGH the motor. When you get airflow restriction(from the heatsink), the heat will just want to stay in the motor, making the motor warmer.
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Old 11-14-2003, 03:40 PM   #15
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Default Re: 64P gears

Quote:
Originally posted by acyrier
Is anybody running 64P gears on a TC3? (smooth carpet track-no bumps...well, hardly no bumps)
I race 64p gears on my TC3, but not on carpet, but on asphault.
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