What 4 Link to choose?

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  1. biomedtechguy

    biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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    On my 70 Roadrunner, I may mini tub.
    What does a "spring relocation kit" with the Gerst triangulated rear suspension look like or do compared to a relocation kit for leaf springs?
     
  2. Torkmnstr

    Torkmnstr Well-Known Member

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    He offers an inboard lower bar setup, so you can use with a mini tub and leaf kit to gain as much room as possible for tire size.
     
  3. biomedtechguy

    biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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    That's the part I don't understand. If you have a triangulated rear suspension, from Gerst or RMS, aren't coilovers what replaces leaf springs?
    Sorry if that's a dumb question, but this is my understanding.
     
  4. Torkmnstr

    Torkmnstr Well-Known Member

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    63-75-Mopar-A-Body-Rear-Leaf-Spring-Re-Location-Kit-_1.jpg

    This is what I mean by relocation kit, then with the inboard lower bar you gain tons of room. The top bars have no dog in the fight, the bottom if they mount in the stock location you wont get any better clearence.
     
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    • biomedtechguy

      biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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      Got it.
      Is that US Car Tools relocation kit?
       
    • 747mopar

      747mopar Well-Known Member

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      I have yet to switch my car over from the leaves but here's my take after researching the options. I personally don't like heim links on a regular driver, to much vibration transfer and they're open to the elements.. I'd prefer poly bushings. As far as tri vs straight 4 link I don't think there's much difference except the tri gets rid of the need for a panhard bar. My other observation is all the kits are meant to be bolt in not correct, ideally the top and bottom links should be equal in length not a stubby upper arm but obviously many are running these setups so they must work fine so maybe that's not so important?? When I do switch mine out I'm going with a torque arm setup, to me it's a easier fit and very simple. I'd also look really hard at how the different kits fasten to the chassis, some have small coilover bars, others have cheesy ways of mounting the upper tri bars.. pick out something that looks well thought out and avoid problems down the road.
       
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      • 5.7 hemi

        5.7 hemi FBBO Gold Member FBBO Gold Member

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        The RMS kit is actually a triangulated 4 link, the upper bars point inward. Can’t comment on the Gerst as I’ve never seen it or installed one.
         
      • Torkmnstr

        Torkmnstr Well-Known Member

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        Yup
         
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        • Torkmnstr

          Torkmnstr Well-Known Member

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          Torque arm is the best setup.
           
        • 1967coronet440

          1967coronet440 Well-Known Member

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          Is anyone making a torque arm kit for mopars? I haven’t seen any.
           
        • Torkmnstr

          Torkmnstr Well-Known Member

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          None that I know of...
           
        • 747mopar

          747mopar Well-Known Member

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          I don't think so but they're pretty simple, I plan on building my own.
           
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          • biomedtechguy

            biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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            My understanding is that any 4 link that requires a panhard or watts bar precludes being able to use the stock fuel tank.
             
          • Torkmnstr

            Torkmnstr Well-Known Member

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            Watts link will require different gas tank. Panhard bar should clear the tank. Trianglulated link will clear due to the smaller upper arms. It also has the most articulation out of the two.
             
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            • Average Joe

              Average Joe FBBO Gold Member FBBO Gold Member

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              I run a 4 link with panard bar. It has worked good. I did have to plate the frame from all the G-force of racing a 4000# car.
              I switched to heim joints when I fixed the tear in the frame. I didn't notice a lot of vibration in regular drivability. But the car is pretty stiff so kinda hard to comment on that.

              DSC01820.JPG DSC01821.JPG IMG_0830_2.jpg IMG_0831_2.jpg IMG_0835_2.jpg
               
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              • aeon280

                aeon280 FBBO Gold Member FBBO Gold Member

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                I think it depends on how you mount the panhard. I'm sticking with leafs but went with composite leafs and then fabbed up a panhard mount that mounts to extended differential bolts and the other end mounts to the old bump stop location. The whole unit set on top of the diff. right in front of the tank.
                 
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                • Mike Gaines

                  Mike Gaines Well-Known Member

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                  This is the true 4 link setup on my 65 Belvedere.
                  The car has a round tube chassis back half from the torsion bar crossmember to the back.

                  29.jpg 30.jpg 31.jpg 31a.jpg 33.jpg
                   
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