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    low speed compression ?
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    When researching how to address squatting, my first call was to the shock manufacture (Fox)... they explained squatting is a result of "low speed shock compression" and with the shocks that I have, 2.0 nitrogen / oil, I was S.O.L. and suggested I purchase new shocks (go figure) . As I am not one to give up easily I begin to think of other possible ways to make my existing shocks work. I have revalved both the front and back shocks a couple times and am pretty happy with the current set up.

    So my question is...

    Is there a way to configure the shims (add a bigger one here, spacer there) so that I can reduce the low speed compression without having a drastic affect on its overall compression rate?

    Any thoughts / experiences / recommendations would be appreciated.
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    Re: low speed compression ?
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    What do you mean by “low speed compression “? Are you talking about the rear squatting under acceleration?
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    Re: low speed compression ?
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    Yes.
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    Re: low speed compression ?
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    Stiffen up the rear, sway bars, anti-squat if applicable, but If the suspension works great in every other way then there’s nothing you can do about it. Accelerate more slowly.
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    Re: low speed compression ?
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    Keeper of the Asylum K-fab's Avatar
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    Squat isn't a bad thing - it's weight transfer and it's putting the weight on the rear wheels, gaining traction.

    I don't know if closing off one or two of the bleed holes in the pistons would help with the squat or not. They allow for free flow at slower shaft speeds, like you'll see during acceleration. By blocking off the open hole(s), you'll effectively stiffen the shock at slow speed compression.
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    Re: low speed compression ?
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    Millenium Member Xbird's Avatar
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    in the "early" fox shock IFP type manuals shim chart section they do have the shim stacks divided into low and high speed comp and rebound. might be worth looking at that arrangement for some shim experiments.
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    Re: low speed compression ?
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    Thanks guys for responding...

    I found a website that has a lot of good info on it and wanted to pass along. it is http://www.crawlapedia.com/ shock_tuning.htm
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    Re: low speed compression ?
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    The Wizard bdkw1's Avatar
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    Quote Originally Posted by Frank View Post
    the shocks that I have, 2.0 nitrogen / oil,
    Air shocks correct?
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    Re: low speed compression ?
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    Yes Sir, air shocks. "smoothies" is what they were called on one site I found them on. Applying the KISS principal I am looking at the shocks first. If I can't resolve it through shock adjustment, my next step will be to look at the suspension set up for ways to correct.

    1000' view...I have increased HP (added turbo) in a production buggy and now I'm having to address the affects of that change. Has a three (3) point IRS configuration made from 1" moly tube. I haven't bent anything yet, so it appears it will be sufficient. But, the squatting is affecting the steering.
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    Re: low speed compression ?
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    Millenium Member plkracer's Avatar
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    If you are talking about a revolt, the short wheelbase and relatively high cg will cause the car to squat.

    Shock valving and low speed compression will only temporarily help. After a second or two, the spring will be holding the back end from sagging, not the valving. I changed my bleed holes in my resi shocks because the front were flowing too much, and the car was bobbing around, much like a road car with worn out shocks. The rear shocks didn't have enough free bleed, but the motion ratio is almost 1:1.

    Air shocks have a weak spring progression in the middle of the stroke. Have you tried to max out the oil volume? Coil overs with dual rate springs would likely help a ton, but would be a big upgrade cost wise.
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