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Technical Gambino 4 link

Discussion in 'The Hokey Ass Message Board' started by brooksinc1976, Apr 14, 2017.

  1. brooksinc1976
    Joined: Dec 4, 2009
    Posts: 282

    brooksinc1976
    Member
    from P-Town

    It has arrived and now the learning curve. Are there any dimension or diagrams out there so I don't totally screw this up? Thx


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  2. Might need more details...................
     
  3. brooksinc1976
    Joined: Dec 4, 2009
    Posts: 282

    brooksinc1976
    Member
    from P-Town

  4. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 9,279

    mgtstumpy
    Member

  5. choptop40
    Joined: Dec 23, 2009
    Posts: 5,743

    choptop40
    Member

    Bags are for groceries.....just kiddin....lots of great info here...
     
  6. brooksinc1976
    Joined: Dec 4, 2009
    Posts: 282

    brooksinc1976
    Member
    from P-Town

    Thx for the info. Keep it coming ha. I was planning on bringing in the "parallel" bars about 1.5" in from the frame hopefully that will have plenty of clearance. How should I plan for the pinion angle if I don't have the trans, I'm planning on having the car ride pretty level. With a level frame should I set it at zero? Thx again


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  7. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,551

    gimpyshotrods
    ALLIANCE MEMBER

    Frame level to the ground. Pinion 3º up, at ride height. The bars are adjustable, set them in the middle of the thread travel.
     
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  8. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 9,279

    mgtstumpy
    Member

    Set the car at ride height (Level) with rear end in and on tyres, measure distance to floor from frame at opposite locations, centre of axle to floor and wheelbase. Hopefully the frame is square and rear end is mounted correctly. Sit the frame on stable stands to replicate ride height and remove rear end. Set replacement rear end centering it in and square to frame so it replicate where it sits at ride height.
    Set the pinion at 3 degrees up and tack weld brackets to housing and frame to keep it where it needs to be before you even think about locating the arms and brackets. Measure and double check lengths and diagonals to ensure everything is where it should be. When you mount the engine / transmission later set it 3 degrees down at rear as per Gimpy.
    Looking at photos above I would use an 1/8" reinforcing plate where the upper and lower brackets attach to frame to spread the load over a larger footprint, less likelihood of a stress crack developing where brackets join top hat frame. I would also gusset the forward end of the lower bracket both horizontally and vertically but that's me. The centre of the notch should be above the centre of the housing tubes. Cut once, measure twice to ensure each side is identical, that way it maintains correct geometry when driving. Remember at ride height that the lower arm pivot points on frame need to be higher that the mounting points on rear end.
    Pinion.jpg
     
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  9. brooksinc1976
    Joined: Dec 4, 2009
    Posts: 282

    brooksinc1976
    Member
    from P-Town

    [​IMG][​IMG]
    More questions:
    - I get level left/right but how do you level it front to back or do you just go for ride height/rake?
    -on the C-Notch I have a 1/4" gap do I leave it on the bottom of the top hat or raise it to stay inline with the top of the notch?
    -does anyone have some center line measurements of the rear end? I measured from the back to CL at 37 1/4", 131 3/4 to the front of the frame and 77 5/8" to the K-member. [​IMG]
    This is where I measured from

    Thx again
    Also, how precise do I need to be on CL to the 1/16?


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  10. brooksinc1976
    Joined: Dec 4, 2009
    Posts: 282

    brooksinc1976
    Member
    from P-Town

  11. Happydaze
    Joined: Aug 21, 2009
    Posts: 2,393

    Happydaze
    ALLIANCE MEMBER

    It's true, you do learn something every day! Today I've learned / seen a different way to move the rear axle rearwards in order to center the wheels in the wells. Looks pretty funky, but functional. Looks to me while you have good access to it all you might as well convert what you have to a more conventional method with the U bolts around the axle, rather than how it appears, around something where the axle used to be. You'll need to fab or buy new axle pads. Mightn't necessarily be better / safer but it'll have less huh or hhhmmm to it.
    Chris
     
  12. 40desoto
    Joined: Jun 19, 2013
    Posts: 80

    40desoto
    Member

    Im sure by now youve probably already got your answer, but where you questioned about having a 1/4” gap, you lay your c notches where you have them placed on the picture and trim the 1/4” off the top cover.
     

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