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Thread: LF Bump stop?

  1. #1
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    Default LF Bump stop?

    Not sure if anyone will share any info on it or not, but whats it do ? I see them a lot nowadays.

    I would think its so you could run a softer spring to help get the Car to steer, but then not fall off a cliff if you get out of the Gas real quick but i never ran one to know.
    Last edited by Kromulous; 03-21-2023 at 09:12 AM.

    Just say no...

  2. #2
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    Quote Originally Posted by Kromulous View Post
    Not sure if anyone will share any info on it or not, but whats it do ? I see them a lot nowadays.

    I would think its so you could run a softer spring to help get the Car to steer, but then not fall off a cliff if you get out of the Gas real quick but i never ran one to know.
    It's about having two different rates and a reliable stopping point. Reasons can include wanting a soft spring to aid weight transfer upon acceleration, soft rate on initial turn-in as you suggested, or probably quite a few other uses. It can actually be easier to tune entry with one, IMO, especially where you slow a lot before entering the corner.
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  3. #3
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    Soft spring to aid weight transfer upon acceleration. Hmm thats interesting, i need to study on that i guess.

    I guess i need to get one on and start tinkering with it LOL.

    Just say no...

  4. #4
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    Quote Originally Posted by Kromulous View Post
    Soft spring to aid weight transfer upon acceleration. Hmm thats interesting, i need to study on that i guess.

    I guess i need to get one on and start tinkering with it LOL.
    I'd say the weight transfer deal would not be a modern use. Back in the leaf and early 4 bar days, guys would run dual rate across the front to have a light rebound rate for maximum weight transfer. You could drag race like nobodies business. Entry was another story...
    Modern Day Wedge Racing
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  5. #5
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    Default

    Back in 2018 i played a bit with 5" X11" springs 250-275# left front 225# RF on a chevelle clip modified.
    had a bump stops on both front shocks.
    at lawrenceburg it would coil bind the RF because of the waves, woop sections in the track.
    I think there should be lifeguards in the genepool.

  6. #6
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    Nov 2007
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    Quote Originally Posted by Kromulous View Post
    Soft spring to aid weight transfer upon acceleration. Hmm thats interesting, i need to study on that i guess.

    I guess i need to get one on and start tinkering with it LOL.
    It is still the same as the left rear, using a soft spring maintains more weight on the tire for the same amount of travel.

    100# spring

    600# load.

    Unload 200#. Spring is 2 inches longer than at ride height.

    600# spring

    600# load

    Unload 200#. Spring is .333 inches longer than at ride height.

    For a given travel, softer spring maintains more load.

    For a given unload, softer spring travels farther.

    Raising the center of gravity is generally synonomous with weight transfer.
    Last edited by 95shaw; 04-01-2023 at 07:14 PM.

  7. #7
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    So your saying in simple terms that the LF Spring can retain some weight longer with the lighter spring, makes since.

    A 275 and 225, thats crazy.

    Just say no...

  8. #8

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    after watchinq a few usmts races this year i think they might have the bump stops on the LF to act as litteral bump stops. a lot of them dropping pretty hard onto the LF on entry

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