Recommended rear coil-over. (4-link)

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  1. Jarven1977

    Jarven1977 Well-Known Member

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    I've decided to build a similar type of 4-link that Alterktion has, the Streetlynx setup but with some of my own ideas.
    Does anyone here have a recommendation on what type and spec. of coil-over to use?
    Springrate, length etc.
    Help would be appreciated.
     
  2. Kern Dog

    Kern Dog FBBO Gold Member FBBO Gold Member

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    Yeah. Leaf springs and better shocks.
    You're welcome. :bananadance:
     
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    • Jarven1977

      Jarven1977 Well-Known Member

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      Well thank you for that input, I will change all my plans now, you convinced me!
       
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      • dvw

        dvw Well-Known Member

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        A 14" spring will give you about 7" of travel, 12" about 5". For street spring rate on a B-Body 130-150. Track only I wouldn't use this type of setup up but 110-120 springs are close. The angles and lengths of the bars gets tricky for track use. Best to copy an existing car for street. Chevelle, Mustang etc. And I agree this is a lot of work for ??? Why are you doing it?
        Doug
         
      • Jarven1977

        Jarven1977 Well-Known Member

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        Well for starters, curiosity is one big reason.
        From what I have read I will get more adjustability and less risk of wheel hop.
        It will mostly be driven on the street but I would like to use it on track occasionally.
        My dad had it on one of his previous Chargers and I really liked how that one behaved.
         
      • Lefty71

        Lefty71 FBBO Gold Member FBBO Gold Member

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        There. I fixed Kerndog's post. Now you wont have wheelhop either. :thumbsup:

        Seriously tho, if you build the setup you mention, it would be kool to see how it turns out, if you pull it off without a reduculoius amount of trial and error and a shop full of garage sale items. I know ( and maybe everyone will counter me here ) a drag race four link is not going to need a whole lot of travel, and it seems to me that they dont run very much preload on a medium stiff 200#? spring either. For the street, I would think you need longer travel to simulate a dynamically loaded car that had to endure differing conditions, utilizing a stiffer spring with an inch or two max of preload, but I'm guessing to a degree.
         
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        • dvw

          dvw Well-Known Member

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          The correct leaf spring and shock package won't wheel hop. I've made hundreds of passes in my 4 speed Challeger. Leaving at 5500 with slicks. Stock factory springs, auto parts store gas shocks and a pinion snubber. I'll be the first guy to say it's your car, build what you want. I'll also tell you that in my 45 years in this hobby I've seen a lot. People get ideas of what they want. This is great. But do thorough research on the big 3. Benefit, cost, and time, then decide. Every day there are things I see that can be done by my big 3. Easier, cheaper, quicker. Above all never compromise the quality of your work. If its no good, start over. Just my 2 cents.
          Doug
           
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          • Jarven1977

            Jarven1977 Well-Known Member

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            Thank's for the replies and input.
            What would you consider a good package if I should keep leafsprings? Not closing any doors here..
             
          • 68Moparmaniac

            68Moparmaniac Well-Known Member

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            R/T, Super Stock leaf springs, pinion snubber some Bilstein's and call it good
             
            Last edited: Dec 3, 2019 at 10:11 AM
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            • dvw

              dvw Well-Known Member

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              What are you trying to do? Street? Stock stuff is fine. Drag race? How quick, tire type,converter? Road race?
              Doug
               
            • Jarven1977

              Jarven1977 Well-Known Member

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              Street and some track. Not dragrace. Manual gearbox.
               
            • slepr1

              slepr1 Well-Known Member

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              About 6 years ago I installed a 4 link in my 71 Cuda (street driven). I have mixed feeling about that mod now. The ONLY thing I like about it is the cool looking factor. Its a noticeable looking upgrade and car guys comment all the time. Other than that it rides rough & noisy. In talking to others that have made this mod, I haven't heard anyone say its good for the street.
              I should have stayed with leaf springs.
               
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              • Jarven1977

                Jarven1977 Well-Known Member

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                Thank's! Man, I really have to think this through!
                 
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                • greycharger

                  greycharger Well-Known Member

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                  The way it was explained in the sixties was that Mopars were given long leaf springs for a smoother ride and the axle was set forward of center to gain a stiffer spring in front of the axle.
                  It was said that with the Direct Connection snubber, the stock springs would wrap up a proper amount for a good launch. Air shocks prevent the springs from working and the springs will wrap up.
                  I remember seeing a lot of late model Mopars with N50 tires, too wide for original wheel wells, jacked up with air shocks, and soon after, they had traction bars to deal with the wheel hop. The stiff suspension created a lack of traction issue.
                  These are all recollections from a long time ago by a child, but a child who lived and breathed Mopars.
                   
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                  • dvw

                    dvw Well-Known Member

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                    I'd run the stock springs with some good shocks.
                    Doug
                     
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                    • greycharger

                      greycharger Well-Known Member

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                      Factory is always a good bet. SS springs and 50/50 shocks IIRC. . They spent many millions on spring development, so I always figured: who am I to out-engineer them?
                       
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                      • biomedtechguy

                        biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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                        I was absolutely certain, and had been for over a year, that I was definitely going to go with a triangulated 4 link, and my only question was RMS or Gerst...
                        That was until this thread, and it has been quite informative.
                        https://www.forbbodiesonly.com/mopa...f-this-thread-but-sliders-or-shackles.182378/
                        The short version: Full Caltracs setup including the split mono leaf springs is my decision, and THAT is NOT changing.
                        I hope to transition from only a few trips to the 1320 a year to going a couple of times a month.
                        Good luck!
                         
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                        • Jarven1977

                          Jarven1977 Well-Known Member

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                          You guys really got me thinking twice about this.
                          Any particular brand/supplier of mono leaf springs, caltracs, shocks and sliders you would recommend?
                          The only thing left that I would miss is the simple way of adjusting height with coil-overs and triangulated 4-link.
                          With the mono leafs I guess it is back to using blocks between leaf and rear axle?
                          I'm after the low pro-touring look..
                          Thank's for all the good Input, I really appreciate the help.
                           
                        • biomedtechguy

                          biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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                          I am hoping that some will reply with what options are available to adjust rear end height with leaf springs.
                          :popcorn2::popcorn2::popcorn2:
                          If that is what you want, a triangulated rear suspension system may be best for you.
                           
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                          • slepr1

                            slepr1 Well-Known Member

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                            For the leaf springs on my Cordoba I'm looking at Eaton Detroit Springs in Detroit Michigan. They offer stock or custom leaf springs for whatever you want to do. They can alter your height higher or lower by up to 3" than stock height. They have the leaf spring blueprints for virtually every car manufactured so they can adjust the final ride height from there. I have lowering blocks on mine right now and don't like them. Many here have suggested SS Springs from Mopar. They ride high from what I hear. I will finish the rear off with Bilstein shocks.

                            https://www.eatondetroitspring.com/leaf-springs/
                             
                            Last edited: Dec 4, 2019 at 11:42 AM
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