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buggy torque issue
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steveo
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buggy torque issue - 09.16.2009, 12:46 AM

i have a kyosho mp777, aveox motor ,mamba monster , 4s zippy lipos for my set and it is very powerful, and since this is my first buggy i dont know much about set up

when i gas the hell out of it it darts off to the left very hard and my tires on the left show more wear than the right, i had a on road car that would torque the same way , is it the motor like causing it to gyro in its direction
   
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_paralyzed_
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09.16.2009, 06:28 AM

nope, not the motor, poor setup

I'd check caster, camber and toe ins on all 4 corners. holding a ruler flat to the face of the tire gives you a good visual to approximate degrees.

A decent spot to start is 1 degree camber on all 4 tires (tops point in to chassis)

1 degree toe out up front and 1 degree toe in out back

and make sure caster is equal on both sides


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Dafni
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09.16.2009, 07:54 AM

On a direct-drive setup with a centerdiff the torque-steer gets kinda canceled out by the weight of the diff spinning in the opposite direction.

If you have a large heavy rotor I can imagine you may feel a bit of torque twist/steer, but nothing like you described.

On that note, I once had a setup with an idler between diff and motor (i.e. diff and motor spinning in the same direction) and the torque steer was noticeable on straight-line dragracing, or in mid-air.

I guess your issue is indeed setup related. Check all the settings. A slightly bad bearing somewhere might cause the same issue, btw.

Daf


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steveo
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09.16.2009, 07:10 PM

thanks i will check al 4 corners, got it from e-bay so you never know what someone else had it dialed in for
   
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Bondonutz
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09.16.2009, 07:22 PM

I don't know if this is related or even true ?

I've read on a couple forums where fellas were having torque steer problems and they turned the diffs over in the case and reversed the motor, viola' problem sloved.


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FG101C
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09.16.2009, 09:35 PM

Yep, my Hyper 9e torqued to the right. Then I flipped the diffs and now it accelerates hard in a straight line.

Last edited by FG101C; 09.17.2009 at 09:19 PM.
   
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steveo
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09.17.2009, 06:59 PM

well somebody let me borrow a set of foam tires and the car accelerated straight, i am thinking is was lack of traction from the tires on the left of the car, but further testing should be done, i will keep in mind reversing the diffs
   
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