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looking to do a Quarter Elliptical rear end. any advice?

Discussion in 'The Hokey Ass Message Board' started by FoMoCo_MoFo, Oct 12, 2007.

  1. FoMoCo_MoFo
    Joined: Mar 30, 2001
    Posts: 1,666

    FoMoCo_MoFo
    Member

    Here's the deal I am looking to do a QE rear end on my RPU. I have a boxed A frame, a 48 ford rear end with split wishbones and I am using an open drive

    So any pics or suggestions on how do get `er done would just be fabulous.
     
  2. CTaulbert
    Joined: Apr 8, 2007
    Posts: 1,248

    CTaulbert
    Member
    from Detroit

    I'm running Posie's quarter elliptical setup on my '34 truck. I'm using hairpins on it, and the ride is really good. The parts are excellent quality and the ride height is adjustable which makes it nice. The whole package is pretty thin profiled, so it leaves quite a bit of room under the bed.
    [​IMG]
     
  3. FoMoCo_MoFo
    Joined: Mar 30, 2001
    Posts: 1,666

    FoMoCo_MoFo
    Member

    wow. that looks killer! do you have anymore pics of how it's attached to the Axle etc?
     
  4. Flatty
    Joined: Sep 26, 2007
    Posts: 98

    Flatty
    Member

    I like!!!! I have built 3 1/4 ellip's on my rockcrawlers, but never on a rod. I was looking at doing this on the front. It seems to work pretty well. The only question is why the panhard? Why not the inverted 4 link?

    dima
     

  5. FoMoCo_MoFo
    Joined: Mar 30, 2001
    Posts: 1,666

    FoMoCo_MoFo
    Member

    here's a bunch more I have found on here using the search button, though only a few as nice as yours.
    [​IMG]
     
    Last edited by a moderator: Jun 1, 2014
  6. FoMoCo_MoFo
    Joined: Mar 30, 2001
    Posts: 1,666

    FoMoCo_MoFo
    Member

    More...
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    [​IMG]
     
    Last edited by a moderator: Jun 1, 2014
  7. Flatty
    Joined: Sep 26, 2007
    Posts: 98

    Flatty
    Member

    What springs are you guys using for this? Are there specific 1/4 lipstick springs? I am liking this idea more and more.

    Dima
     
  8. FoMoCo_MoFo
    Joined: Mar 30, 2001
    Posts: 1,666

    FoMoCo_MoFo
    Member

    some guys use the Posies Springs which are purpose built and some guys use trailer springs and others just cut buggy springs in half...

    there are a ton of posts on here with guys using them up front but not too many about them being used in the rear...
     
  9. CTaulbert
    Joined: Apr 8, 2007
    Posts: 1,248

    CTaulbert
    Member
    from Detroit

    I ran a panhard to eliminate the chance of side travel since the rearend is just located with hairpins. You could make some brackets for the rear, but for the money, I just bought speedway's brackets for putting a transverse spring on top of the rearend. The radius on their brackets fits a 3" tube, so I just turned the bracket to face the spring. I used the actual mounting end of the bracket for the link to my friction shock.
    [​IMG]
    [​IMG]
     
  10. flatheadpete
    Joined: Oct 29, 2003
    Posts: 10,191

    flatheadpete
    Member
    from Burton, MI

    Look at this...Not a super pic but it's 1/4 ell. Bad ass. Search for Dan Webb Submarine.
     
  11. FoMoCo_MoFo
    Joined: Mar 30, 2001
    Posts: 1,666

    FoMoCo_MoFo
    Member

    TudorChevy, I like the set up and dig how you are using the Speedway brackets as the friction shock mounts as well...
     
  12. dickster27
    Joined: Feb 28, 2004
    Posts: 3,197

    dickster27
    Member
    from Texas

    Dave Gail, was the king of quarter eliptic spring setups, both front and rear. RIP.

    I have a pair running transversely under my Phaeton in the rear over the quickchange. From the back it just looks like a standard transverse buggy spring setup.
     
  13. CTaulbert
    Joined: Apr 8, 2007
    Posts: 1,248

    CTaulbert
    Member
    from Detroit

    A quarter elliptical setup, as well as a transverse spring, makes the rearend look a lot cleaner.
    [​IMG]
     
  14. scottwaters
    Joined: Oct 12, 2007
    Posts: 38

    scottwaters
    Member
    from DFW

    Too funny, just got in from my shop where I JUST finished this exact style build!
     
  15. FoMoCo_MoFo
    Joined: Mar 30, 2001
    Posts: 1,666

    FoMoCo_MoFo
    Member

    Well, let's see some pics!
     
  16. 51Gringo
    Joined: Jul 22, 2006
    Posts: 652

    51Gringo
    Member
    from Nor Cal

    Quick question, how do those springs ride?
     
  17. brewsir
    Joined: Mar 4, 2001
    Posts: 3,278

    brewsir
    Member

    They ride nice......they are just like running regular leaf springs just mounted differently.
     
  18. JOECOOL
    Joined: Jan 13, 2004
    Posts: 2,760

    JOECOOL
    Member

    [​IMG]
    I did mine the cheapass way. 57 chevy rear springs cut in half. Stiff part to the front because of weight,other part to the rear. I did not use a shackle as I use the spring as a lower link with a tubing link up on the top for a leaf link rather than a four link. Angle the top link and you don't have to have a panard bar. May not be perfect but the price is right and it rides well .
    [​IMG]
    [​IMG]
     
  19. krylon32
    Joined: Jan 29, 2006
    Posts: 7,422

    krylon32
    Alliance Vendor
    from Nebraska

    My first was a set of springs made from a 40 Ford front. Used the springs on top and a bars on the bottom. Worked great, I see the car every year at the LARS with over a 100K on the speedo and still going strong. I have built several deuce chassis using the Posie spring kit with shackles and P&J ladder bars on the rear. They work and ride great!
     
  20. twofosho
    Joined: Nov 10, 2005
    Posts: 1,153

    twofosho
    Member

    Any transverse "buggy" spring is functionally just two quarter elliptics connected together.
     
  21. Kamp
    Joined: May 27, 2006
    Posts: 358

    Kamp
    Member
    from Peoria, IL

    I also used '57 Chevy wagon leaves cut in half. CE coilover brackets on the axle. It's not as clean as some here, but ride height is adjustable, as is the upper bar. I drove it for the first time at HCPU on Saturday, but it seems like it worked well.

    This picture is from initial mock up.... not completed, but you get the idea.
    [​IMG]
    http://www.jalopyjournal.com/forum/showthread.php?t=133842
     
  22. uncle buck
    Joined: Feb 13, 2007
    Posts: 1,651

    uncle buck
    Member

    I found this old thread doing a search and was wondering if anybody besides Posies is offering Quarter Elliptical Spring Kits? I have been giving it some thought for my 29 rpu
     
  23. powmia
    Joined: Oct 4, 2009
    Posts: 126

    powmia
    Member

    Made mine with everything I needed from Big R (Tractor Supply Co. is the same). All trailer springs, ended up only needing a couple brackets from Speedway. The trailer springs are the same rating and 1 3/4" wide w/3/4" eye just like the ones speed shops sell. Ended up doing the front and rear of my bucket for under 100 bucks![​IMG]
    [​IMG]
    [​IMG]
     
  24. pasadenahotrod
    Joined: Feb 13, 2007
    Posts: 11,776

    pasadenahotrod
    Member
    from Texas

    When some guys back in the 70s were working with the 1/4 elliptic idea they used cut Pinto/Bobcat rear springs. Very cheap and spring rate was good for light roadsters and coupes.
     
  25. SPEEDBARRONS
    Joined: Aug 23, 2004
    Posts: 1,248

    SPEEDBARRONS
    Member

    A springs
     

    Attached Files:

  26. Window Licker
    Joined: Apr 18, 2009
    Posts: 288

    Window Licker
    Member

  27. zzford
    Joined: May 5, 2005
    Posts: 1,823

    zzford
    Member

    It should be noted that if using a four bar or hairpin for locating the axle, the spring MUST have a movable shackle on one end. Otherwise, something will eventually break. When the spring deflects, it also straightens putting a bind in the suspension. Also, when using a spring as a suspension link with only one trailing arm on each side, pinion angle will change on bumps. Will it work? Yeah, but why not do it correctly and use 2 arms per side and a shackle on the spring?
     
  28. nightperson
    Joined: Feb 1, 2008
    Posts: 90

    nightperson
    Member

    can anyone help with the calculations of the top bars? I'm wanting to run the 1/4 ellipticals in the rear on triangulated 4 link. these are the specs on the spring. I'm also wanting to run the bars from center to th outside of the rear. does this create too much binding?

    1-3/4" wide
    17-3/4" overall length
    15-5/8" eye to spring end
     

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