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balancing knock-off's

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Old May 24, 2003 | 07:19 PM
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Default balancing knock-off's

Hi Guy's. Has anyone experienced balancing problems with knock -off's? I have tried about 4 different shops to get rid of a shimmy @ about 55 - 60 mph. Each shop has difficulty mounting the wheels on the balancer. Can you balance them with the hub and spinner?
Thanks
Dave :confused:
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Old May 24, 2003 | 07:33 PM
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Default Re: balancing knock-off's (ddaveyboy@home.com)

Heh Dave,
I just did my KO's with 215/70R/15's. The shop I used had no problem with the balance job. They were not balanced with the spinners or the cones.The shop used stick on weights rather then Hammer on type between the wheel and tire. The stick on's I have been told are better do to the fact that they can be placed more accurately.

I'm sure our forum experts could add some more info for you. It is important to choose a shop with the latest balancing equipment. :cheers:


[Modified by Viet Nam Vett, 7:35 PM 5/24/2003]
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Old May 24, 2003 | 07:35 PM
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Default Re: balancing knock-off's (ddaveyboy@home.com)

You need to find a shop with a Hunter 9700 and have the wheels and tires tested for runout/radial force variation. If it's in the tires you should be able to get an adjustment on a replacement set. Go to :
http://www.gsp9700.com

to locate a shop in your area with a 9700.

Duke
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Old May 27, 2003 | 08:40 AM
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Default Re: balancing knock-off's (SWCDuke)

Thanks for the help. I have located a shop with that balancer. Have you heard of centering rings? They are suggesting that I find ( or make) a set prior to balancing the wheels. Thay center the bolt on hub to the original hub.
Thankls
Dave :chevy
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Old May 27, 2003 | 03:01 PM
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Default Re: balancing knock-off's (ddaveyboy@home.com)

I had my knock-off's balanced several times with poor results. I found out that the tires were old (10 yrs.), sat too long and had flat spots. The side walls tend to soften on one side not the tread so it's hard to notice. I installed new tires and the wheels balanced perfectly. :hurray:
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Old May 27, 2003 | 03:24 PM
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Default Re: balancing knock-off's (ddaveyboy@home.com)

Thanks for the help. I have located a shop with that balancer. Have you heard of centering rings? They are suggesting that I find ( or make) a set prior to balancing the wheels. Thay center the bolt on hub to the original hub.
Thankls
Dave :chevy
Get a set of valid Hunter 9700 data before you buy some snake oil fix. Hint: record actual measured radial force variation and wheel runout. If you're not there watching the numbers to write them down, specify on the RO that you want the data WRITTEN DOWN ON PAPER. Chalk mark each tire/wheel with a number so you know which the data applies to.

Post the data here, so we can evalutate it.

Duke
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Old May 27, 2003 | 06:35 PM
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Default Re: balancing knock-off's (ddaveyboy@home.com)

Balancing the wheels should not be a problem or issue, but eliminating the shimmy might take a little effort.

I've been there-done that and the only way I eliminated shimmy/wobble/vibration at certain speeds was to "index" the adaptors and wheels.

With the wheel removed, start with a stationary object positioned extremely close to the adaptor. A jack stand or block of wood, etc works fine. Rotate the hub/adaptor and observe for "hop", "wobble" or any other type of distortion. Then remove the adaptor and rotate it one lug position over, and repeat the process of observation. After you've rotated the adaptor around all 5 lug positions determine which position gave the least amount of distortion and mount the adaptor in that position.

Then mount the wheel, and using the same process, determine which of the 5 lug positions give the least amount of distortion.

Then repeat with the other 3 wheels. :eek: :cheers: :eek:

Doing it this way is a Royal PITA, but it works. If I've not explained it clearly, gimme an E-Mail.
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Old May 28, 2003 | 01:59 AM
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Default Re: balancing knock-off's (7vettes)

Thanks for all the help. I can probably do the indexing with a dial indicator,to get the best (or least mrunout)
Dave :iagree:
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