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    Spring weights flipped
    #1
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    On a dual rate set up. What would be the advantage to putting the heavier spring in the top position and the lighter spring in the lower position?

    This configuration is recommended by Elka for the front end of my buggy and I am trying to understand the benefits / reason for doing this.

    Thoughts?
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    Re: Spring weights flipped
    #2
    Keeper of the Asylum K-fab's Avatar
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    Same length springs?
    Do you have adjustable cross over rings on the shock bodies? If so that would be a no. You’ll lock out the heavier rate spring during heavy compression if you do.
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    Re: Spring weights flipped
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    Admittedly I'm completely uneducated on the subject, but I can't even see how it would make a difference at all? I mean the softer part of the spring will compress easier than the stiffer part no matter where it is, right?
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    Re: Spring weights flipped
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    I could see it being an issue if one spring is too short to be on the bottom. I would think that would be an obvious problem though. Like if it didn't reach far enough up on the shock body.

    I would think the softer spring would be on the bottom, just to lessen the amount of movement of the spring that slides up and down on the shock body? Just an uneducated guess though.

    Cant really tell from the image. That crossover setting has my mind spinning..lol
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    Re: Spring weights flipped
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    OK I think I got my mind wrapped around it...lol Like Kfab already said, I think you put the soft part up top, so when you reach the crossover, it will eliminate the soft spring and only rely on the stiffer bottom spring. Without the cross over setting, I don't think it would matter which spring was on top or bottom.
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    Re: Spring weights flipped
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    The only way I can see it making sense the other way around, is if the two springs together are softer than the one ''soft'' spring alone. Which I guess is a possibility, because there are twice as many coils.

    You can thank me for not helping at all..lol I will shut up now and hope you two work it out.
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    Re: Spring weights flipped
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    [QUOTE]
    Quote Originally Posted by K-fab View Post
    Same length springs?
    Springs are different lengths. Bottom spring is 12" x 125# and the top spring is 8" x 150#. Travel is 10"

    You’ll lock out the heavier rate spring during heavy compression if you do.
    Yes that crossed my mind and is the part that's not making any sense to me...lol

    I'm wondering if it has to do with the higher than normal unsprung weight.
    Last edited by Frank; 10-15-2019 at 10:48 PM.
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    Re: Spring weights flipped
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    I know I said I was gonna shut up lol , but it looks like you answered your own question. If the travel is 10'' and the short spring is 8'' then it couldn't be on the bottom. It wouldn't reach the shock body where the two springs meet.

    And I think I might be on the right track with the two springs acting together, they may be softer than with the one spring locked out.
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    Re: Spring weights flipped
    #9
    Keeper of the Asylum K-fab's Avatar
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    If you have a separator and a cross over collar, soft on top, no question.

    8 & 12 lengths - shorty on top. Id ignore Elka on this one.

    And I think I might be on the right track with the two springs acting together, they may be softer than with the one spring locked out.

    And I think I might be on the right track with the two springs acting together, they may be softer than with the one spring locked out.

    Yes, to a point. Bottom part of the page explains it. http://yellowdogracing.com/springs.htm
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    Re: Spring weights flipped
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    Millenium Member plkracer's Avatar
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    125 lb and 150 lb/inch spring combo gives you an effective rate of 68 lb/inch at the beginning of the stroke.

    Depending on which spring you consider your main, you would jump up to a 125 lb/inch, or a 150lb/inch once the crossover collar is contacted.

    Too much main spring can cause pogo problems, but it can be bandaided with adjustments to the cross over. Either of those should be fine, though, and since your 8 inch spring is too short to act as the main, leave the 12 as your main.
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