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Hot Rods Posies Quarter Elliptical Springs - removing a leaf

Discussion in 'The Hokey Ass Message Board' started by BeaverMatt, Jul 16, 2019.

  1. BeaverMatt
    Joined: Jun 17, 2013
    Posts: 25

    BeaverMatt
    Member

    Has anyone removed a leaf (or two) from a set of Posies quarter elliptical springs? Was it successful, a failure, or something else? I have a set in the rear of my car. The car rides VERY harsh and I'm looking to soften it up a little.
     
  2. Torana68
    Joined: Jan 28, 2008
    Posts: 1,189

    Torana68
    ALLIANCE MEMBER
    from Australia

    What shocks, what rear tyres and pressure?maybe a photo of the set up .....
     
  3. BeaverMatt
    Joined: Jun 17, 2013
    Posts: 25

    BeaverMatt
    Member

    Thanks Torana68, not to sound flippant, but I'm really just want to know if anyone has pulled a leaf or two out of a set of Posies quarter ellipticals and if so how it worked.
     
  4. Torana68
    Joined: Jan 28, 2008
    Posts: 1,189

    Torana68
    ALLIANCE MEMBER
    from Australia

    Point was it might not be your springs.......
     
    1946caddy likes this.

  5. KevKo
    Joined: Jun 25, 2009
    Posts: 441

    KevKo
    Member
    from Motown

    What Torana68 said. Remove your shocks and go for a short ride. If the suspension is compliant you need a softer shock, or a less severe angle (assuming tube shock). May be other binding too. Play with tire pressure. That's free. Of course if you've already done all that, we don't know.
     
  6. krylon32
    Joined: Jan 29, 2006
    Posts: 6,627

    krylon32
    Alliance Vendor
    from Nebraska

    I've done several customer chassis with the Posie 1/4 elliptic setup using shackles and holding the rear in place with P&J ladder bars. So far I've never had a complaint about ride. I use a fairly soft P&J shock. One thing that has happened is I've had 2 of the cars (both 32 roadsters) with high miles have the main leaf break thru the spring bolt hole? I've never liked the way the spring flexes thru the spring bolt as it rests against the adjusting bolt. Maybe they've changed this?
     
  7. BeaverMatt
    Joined: Jun 17, 2013
    Posts: 25

    BeaverMatt
    Member

    Been away for a while. Thanks for the replies. I'm really asking a generic question about removing a leaf from these springs. My car had some binding from a crack in the frame (causing one spring to be out of alignment, which I've repaired and improved). This has made things much better. I'm also trying new shocks - which will help a lot given that my shocks are very stiff on compression. I'm not new to suspension. I've built several cars with different types of suspensions. This is my first go with a quarter elip, and while I'm repairing and improving, I just wanted to ask if anyone had done it, in case after exhausting my other options, it could be something to try. The bolt thru style worried me about trying it, so I thought I'd ask. Krylon - what you mention about the eye bolt cracking was something I was worried about. haven't seen it yet, but it looks like a week link to me.

    Thanks everyone!
     
  8. 1ton
    Joined: Dec 3, 2010
    Posts: 399

    1ton
    Member

    The setup where the adjusting bolt contacts the top leaf directly just seems wrong. I once saw a design that had a load bearing plate between the adjuster and spring. Looked like they machined it out of ductile iron or something. It was countersunk on top for the adjuster screw and rounded on the bottom, front to back, to spread the load at that point..
     
  9. Never2old
    Joined: Oct 14, 2010
    Posts: 648

    Never2old
    Member
    from so cal

    I took a leaf out of the rear springs on my RPU.
    I am happy with the ride. cab only.JPG LA Roadster-6.jpg
     
    OFT likes this.
  10. BeaverMatt
    Joined: Jun 17, 2013
    Posts: 25

    BeaverMatt
    Member

  11. lostone
    Joined: Oct 13, 2013
    Posts: 1,358

    lostone
    Member
    from kansas

    BeaverMatt if you remove a spring, which I see no problem doing, I would be sure to replace the removed spring with a short piece of strap the width of the spring.

    I think those are 1_7/8" wide so a plate say 1_7/8 x 4" to keep some thickness and strength around the center bolt.

    I've heard of them fracturing around the spring bolt hole so that's why I built my own with upper and lower plates to run an adjusting bolt against.

    Here's mine,
    https://www.jalopyjournal.com/forum...ter-elliptical-springs.1115374/#post-12732628
     
  12. BeaverMatt
    Joined: Jun 17, 2013
    Posts: 25

    BeaverMatt
    Member

    Thanks for sharing lostone. Great build thread and advice!
     

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