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Spring behind rear on model "A" coupe

Discussion in 'The Hokey Ass Message Board' started by scrap metal 48, Dec 17, 2009.

  1. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 6,128

    scrap metal 48
    Member

    Rear crossmember is welded at frame,gusseted under crossmember and braced to frame. Spring is 1946 front. Hairpins are 32" long attached to crossmember mount.
     

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  2. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 6,128

    scrap metal 48
    Member

    Stance is better too.........
     

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    Last edited: Jan 21, 2014
  3. SniffnPaint
    Joined: May 22, 2008
    Posts: 434

    SniffnPaint
    Member

    Stance looks much better.
     
  4. blackout
    Joined: Jul 29, 2007
    Posts: 1,320

    blackout
    Member

    Has a nice profile now. That is some good home shop hot roddin
     
  5. Dyce
    Joined: Sep 12, 2006
    Posts: 1,980

    Dyce
    Member

    Nice stance!! I wonder if the crossmember will take the twisting load though. I would do some gusseting in the corners to be safe if it was mine.
     
  6. LSGUN
    Joined: May 26, 2007
    Posts: 1,389

    LSGUN
    Member
    from TX

    Looks great! What size tires are you running?
     
  7. von Dyck
    Joined: Apr 12, 2007
    Posts: 678

    von Dyck
    Member

    If you completely box the rear crossmember with 3/16" plate, it'll take the twisting.
     
  8. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 6,128

    scrap metal 48
    Member

    Tires are 7.10x15" rear and 5.60x15" front............
     
    Last edited: Jan 21, 2014
  9. bobscogin
    Joined: Feb 8, 2007
    Posts: 1,797

    bobscogin
    Member

    +1 on that. The crossmember wasn't designed for an eccentric load, so it needs some added torsional strength.

    Bob
     
  10. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 6,128

    scrap metal 48
    Member

    As stated in opening thread; Rear crossmember is welded to frame,not just rivited.Crossmember is gusseted underneath. There are 2 angled braces between crossmember and side rails. There appears to be NO cantilever effect with these modifications....But I ain't no expert........
     
    Last edited: Dec 18, 2009
  11. Dyce
    Joined: Sep 12, 2006
    Posts: 1,980

    Dyce
    Member

    Sorry, I didn't notice the 2 braces. If you have the ends reinforced and the braces in place it should work.. Nice coupe!!
     
  12. orcas tow
    Joined: Nov 23, 2004
    Posts: 282

    orcas tow
    Member

    I have been stalled on my A coupe build looking for a good clean route to install my 36 rear banjo, radius rods, rear mounted spring & closed driveline in my 31 A coupe with a rumble seat, your straight froward mod is the ticket, thanks for posting.
     
  13. Zombie Hot Rod
    Joined: Oct 22, 2006
    Posts: 2,452

    Zombie Hot Rod
    Member
    from New York

    Why not just move the cross member back?
     
  14. Southfork
    Joined: Dec 15, 2001
    Posts: 1,465

    Southfork
    Member

    Moving the crossmember back seems like the usual way, but this should work well too, and probably is less time consuming.
     
  15. fab32
    Joined: May 14, 2002
    Posts: 13,985

    fab32
    Member Emeritus

    I like your method of getting the spring centerline back for the "spring behind" application. I'm going to try that on the Model A frame I'm putting my '27 body on. Looks like it might be a little less work than lenghthening the frame.

    Frank
     
  16. even if you moved the crossmember back , the `46 front spring would not fit up into it
     
  17. Like that spring behind. Outa dump my coil overs under my roadster and do it. Maybe somday.
     
  18. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 6,128

    scrap metal 48
    Member

    Thought I would bring this thread back up to say after 2 1/2 yrs with this set up, everything was still working fine.. I have seen some questions about spring behind setups on stock model A frames and thought maybe this could help.. I've since sold the coupe and moved on to other A's..
     

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