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Technical Another triangulated four link question.

Discussion in 'Traditional Hot Rods' started by 1941Torpedo, Dec 2, 2016.

  1. 1941Torpedo
    Joined: Oct 6, 2014
    Posts: 45

    1941Torpedo

    Hey all,

    I know tri-link has been covered in multiple threads, and I have read and researched. It's enough to make your head spin, but I thought it was time to actually do something.
    So I'm out in the shop about to start the mock-up, and it occurs to me I'm unclear where the upper arm angle is measured from!
    I am planning on 7 degrees down. Is that 7 degrees in side view or along the length of the control arm?

    Thanks,
    Jeff[​IMG]

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  2. 1941Torpedo
    Joined: Oct 6, 2014
    Posts: 45

    1941Torpedo

    I just did some checking, and it DOES make a difference. A 2 degree difference.

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  3. chopolds
    Joined: Oct 22, 2001
    Posts: 6,313

    chopolds
    Member
    from howell, nj
    1. Kustom Painters

    But if I remember correctly, they used to sell a kit that raised the pivot on the G body links (rear end side), to make it hook up better. Not sure what it did for cornering, though.
    You might also consider making new upper arms, with adjustments , so you can set pinion angle, if you run lower than a stock geometry. I've done them with Thor Bros pieces.
     
  4. Relic Stew
    Joined: Apr 17, 2005
    Posts: 1,237

    Relic Stew
    Member
    from Wisconsin

    Geometry angle calculations are done from side view and top view.
     
  5. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 9,253

    mgtstumpy
    Member

    Setting it up at ride height is the key to success. Correct pinion angle is critical and having some degree of adjustment is a bonus. Most kits leave no room for error with initial set up angles being final setup angles. Lower arms need to be set up so they are NOT pointing down towards the front
    TRIANGULATED4-LINK.jpg tri4link.jpg
     
  6. 1941Torpedo
    Joined: Oct 6, 2014
    Posts: 45

    1941Torpedo

    As I understand it, there is a trade off between hooking up and wheel hop under braking.

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  7. 1941Torpedo
    Joined: Oct 6, 2014
    Posts: 45

    1941Torpedo

    Yup, mocked at height with correct pinion angle, will have threaded rod ends. No kit, but will not build in any other adjustability.
    I have seen these layouts before, I have copies on my computer. They contain conflicting elements, both in control arm length and angles. I think this is what makes figuring out what to do so frustrating.
    I know there is that Excel spreadsheet download that you can plug #s into. I was hoping not to dive in that deep. Maybe I'll mock it up how it works for me and plug in my #s and see.
    Thanks.

    Sent from my SM-G935T using The H.A.M.B. mobile app
     

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