TC3 gearing

Discussion in 'RC Onroad Forum' started by coolboxerman, Feb 26, 2004.

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  1. coolboxerman

    coolboxerman New Member

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    i have a question, i'm running a green machine 3 in my tc3 and my gear ratio is 7.4:1. the problem is that it gets crazy hot, too hot to touch after each run. am I overgearing it?, how many teeth should my pinion and spur be?
  2. mastmec

    mastmec Member

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    Is 7.4:1 your final or primary(motor/spur) ratio? What pinion and spur are you using now?
  3. coolboxerman

    coolboxerman New Member

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    it's a 59T spur, 25T pinion.
  4. mastmec

    mastmec Member

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    Go back to stock gearing and see if that helps, your motor is a high RPM motor, your running a 2.36:1 primary, I would go much higher, stock first though.
  5. timrock

    timrock Active Member

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    how do you figure 7.4:1 ?
  6. timrock

    timrock Active Member

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    to get good help,you need to tell me what the ratio is.7.4 to one what.

    count how many times the motor turns to one turn of the drive wheel and let Me know.
  7. mastmec

    mastmec Member

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    If you have so much experiance at this, figure it out yourself.
  8. timrock

    timrock Active Member

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    thats not nice to tell the guy,mastec.whats you problem?
  9. mastmec

    mastmec Member

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    That was for you TIM.
  10. timrock

    timrock Active Member

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    well you make no sense coming in here and coming across as if you have experience where you do not.
  11. mastmec

    mastmec Member

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    Well the second dumb question you asked was "7.4 to what" which he said in the beginning, TO 1.
  12. coolboxerman

    coolboxerman New Member

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    the motor turns approximately 7.4 times to make the drive wheel go one full revolution.
  13. mastmec

    mastmec Member

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    One other thing is to check the drive train for any binding and make sure the pinion gear is not too close to the spur.
  14. timrock

    timrock Active Member

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    ok 7.4 is very low gearing.you are not over geared.
  15. timrock

    timrock Active Member

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    man with them small wheels and a 7:1 wheel to shaft ratio,you must have hardly any top end speed.
  16. coolboxerman

    coolboxerman New Member

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    well, i use my rc to run over friends' xmods mostly. I usually give them a head start then accelerate and run over their xmods. Man, so much fun doing that
  17. timrock

    timrock Active Member

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    well if you are enjoying it then thats what matters.7:1 ratio? your TC3 must be pretty quik off the line.i bet,you just hit it the trigger and it is Gone.
  18. mastmec

    mastmec Member

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    OK timrookie, 7.4:1 ratio is at the top of the gearing, one more pinion size and it will be maxed out, he's geared for top end. Where do you get off telling him that he's geared very low.
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