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    Re: Turbo Hayabusa Buggy Suspension issues
    #11
    Millenium Member
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    Just from vid looks like rebound is slow, comp high causing it to pack and pogo. Front didn't look too bad, I'd only play with rear, getting it closer will help front too. But I'm no coilover guru, but spring rate don't sound far off.
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    Re: Turbo Hayabusa Buggy Suspension issues
    #12
    Millenium Member Deranged's Avatar
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    Here is a cool video on spring calculation. I'm pretty much stupid, so this was the only way I could wrap my head around the whole spring-rate. If this was a VHS tape it would be worn out. LOL

    https://www.youtube.com/watch?v=4FZp_oDGQNY
    https://www.youtube.com/watch?v=NLhqHPILqn0

    Way cool ways to determine spring rates regardless of suspension design.

    Justin
    Nowhere near the desert.
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    Re: Turbo Hayabusa Buggy Suspension issues
    #13
    The Wizard bdkw1's Avatar
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    Both of those videos are geared to the rock crawling crowd. Set your minibuggy up like that and it will be way to soft.

    All that frequency talk is a snow job. Frequency matters in valve springs, not coilovers.

    Unsprung weight and sag #'s are all that you need.
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    Re: Turbo Hayabusa Buggy Suspension issues
    #14
    Keeper of the Asylum K-fab's Avatar
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    Quote Originally Posted by bdkw1 View Post
    Whoa, Desert rides flashback.

    Also, that diagram will do nothing for you. It is for a solid axle with a 3/4 link. Your IRS will not react at all like that. Not even a little.
    Quote Originally Posted by bdkw1 View Post
    Both of those videos are geared to the rock crawling crowd. Set your minibuggy up like that and it will be way to soft.

    All that frequency talk is a snow job. Frequency matters in valve springs, not coilovers.

    Unsprung weight and sag #'s are all that you need.
    Sounds like a conversation I had with Flyer recently - he kept going on and on about squat and anti-squat and then someone said "it's for solid rear ends" and we threw it all out the door.

    I've heard the same thing about the frequency thing too - not a real world app for our suspensions. Good to see both of these comments from our local Wizard.
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    Re: Turbo Hayabusa Buggy Suspension issues
    #15
    Millenium Member Deranged's Avatar
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    Quote Originally Posted by bdkw1 View Post
    Both of those videos are geared to the rock crawling crowd. Set your minibuggy up like that and it will be way to soft.

    All that frequency talk is a snow job. Frequency matters in valve springs, not coilovers.

    Unsprung weight and sag #'s are all that you need.
    Very true, the frequency talk didn't sink in very far and I threw that out.

    Justin
    Nowhere near the desert.
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    Re: Turbo Hayabusa Buggy Suspension issues
    #16
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    You can apply the anti-squat to an IRS if you have castor angle built in, the only mass produced example off the top of my head would be on a Polaris outlaw 525 IRS, the rear arms are angled 10 degrees or so - when the tire pushes against the ground to go forward, the reactive force pulls the suspension arm down slightly (maybe not more than the weight transfer of the ATV/rider put on the suspension, but it would act as an anti squat). A solid rear axle that's driveshaft driven has a reactive force about ring/pinion gear that adds to the antisquat relation, while a chain driven axle this force is countered by the tension on the chain.
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    Re: Turbo Hayabusa Buggy Suspension issues
    #17
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    Hey FNS, are you going to Glamis for new years?

    PS,
    I could also use some help from the suspension genius
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    Re: Turbo Hayabusa Buggy Suspension issues
    #18
    Vendor yoshi's Avatar
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    The suspension is packing up really bad. Run the video in slow mo at the 1:31 mark (on youtube hit the space bar fast to pause un-pause). The rear wheels is not coming down so i'm another vote to look at rebound......
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