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Technical Wishbone clearance/wheel travel?

Discussion in 'Traditional Hot Rods' started by Autodave, Aug 17, 2018.

  1. Autodave
    Joined: Jul 28, 2013
    Posts: 125

    from Menifee,Ca

    On my Model A project I'm making my own wishbone, I have about 1 inch clearance between my exhaust and wishbone. Do you think this is enough taking in the consideration with wheel travel?
    Drivers side:
    WilliD likes this.
  2. bobscogin
    Joined: Feb 8, 2007
    Posts: 1,674


    In situations like that, I wrap a ratchet strap around the axle and crossmember and start ratcheting it down to check.

    scrap metal 48 likes this.
  3. gimpyshotrods
    Joined: May 20, 2009
    Posts: 16,500


  4. Autodave
    Joined: Jul 28, 2013
    Posts: 125

    from Menifee,Ca

    Thanks Bob, I was thinking of doing that, I will give it a try!
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  5. Kiwi 4d
    Joined: Sep 16, 2006
    Posts: 2,557

    Kiwi 4d

    Or just jack up one side of the car. I doubt there is enough clearance at present.
  6. Autodave
    Joined: Jul 28, 2013
    Posts: 125

    from Menifee,Ca

    I bottomed it out use a jack and strap, it doesn't hit, but it's close. I'm going to try and angle the ball end down to give me a little more space.
  7. alchemy
    Joined: Sep 27, 2002
    Posts: 14,711


    That will change your caster.
  8. Autodave
    Joined: Jul 28, 2013
    Posts: 125

    from Menifee,Ca

    I know, everything is just tacked at the moment.
  9. Mike VV
    Joined: Sep 28, 2010
    Posts: 1,691

    Mike VV
    from SoCal

    Most probably not (enough clearance).
    Just cycle the suspension/axle thru its travel, as has been noted..!

    Again..????? The "caster" comment above. Its gonna be what it's gonna be, whether the arm hits the exhaust pipe or not..! What the hell.

    Looks like a header change is in order.

    gimpyshotrods and clem like this.
  10. Departed
    Joined: Dec 20, 2010
    Posts: 49

    from Canada

    If you jack up the wheel as far as the jack will let you, you'll see what clearance you have. Don't forget, not only this side of the wishbone will go up, but the other side goes down.. You catching my drift here?
    Try that. If it doesn't touch or is just touching. You could be ok. If not, turn out your header a little ??
  11. BamaMav
    Joined: Jun 19, 2011
    Posts: 3,708

    from Berry, AL

    If it hits, it'll probably put a neat little dent in the pipe for clearance for the next time. :D
    3banjos likes this.
  12. Ned Ludd
    Joined: May 15, 2009
    Posts: 3,877

    Ned Ludd

    A. What is the length of the wishbone?
    B. What is the distance from the wishbone's rear pivot point to where it crosses under the exhaust?

    If A/B is less than about 3½ you've got a problem.
    Cliff Ramsdell and 117harv like this.
  13. 19Fordy
    Joined: May 17, 2003
    Posts: 6,547


    Can you modify your headers?
    55styleliner likes this.
  14. thirtytwo
    Joined: Dec 19, 2003
    Posts: 2,590


    Pull the spring out and put a block between the crossmember and the axle in the center where the ubolts are approx 1 1/2” thick your answer awaits ,

    ive got 3/4” clearance on mine but it’s back torwards the back of the bone so very little movement
    missysdad1 and gimpyshotrods like this.
  15. Street Is Neat
    Joined: Oct 11, 2011
    Posts: 155

    Street Is Neat
    from Hat City

    On my AV8 with unspilt wish bone I have 1” inch clearance . My issue was the 59 back oil pan clearance .
    I’m running rev main eye leaf spring and I think I removed two odd lefts
    Cliff Ramsdell likes this.
  16. Autodave
    Joined: Jul 28, 2013
    Posts: 125

    from Menifee,Ca

    Thanks for all of the replies!
    I ended up doing 2 things, 1) I put a spacer between the ball mount and the cross member which dropped that down 1/8". 2) I piecut the rear of the wishbone which aimed the ball yoke down a bit. When my suspension is fully compressed I have 3/4"-1" of clearance from my header. I feel comfortable with that...the ball actually seems to be in a better position now.
    Departed likes this.
  17. missysdad1
    Joined: Dec 9, 2008
    Posts: 2,813


    Autodave: A miss is a miss. You don't need any "extra" clearance. So as long as everything clears with the suspension fully compressed you're golden. Had I been you I'd have left it alone.
    Autodave likes this.

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