Ls1 valvesprings for stock magnum heads

Magnum Engine Swaps

  1. Dustert73

    Dustert73 Stripping bolts since ‘10

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    Wondering what it takes to put stock ls1 valvesprings on stock magnum heads, and is it really worth the trouble or should I stay with the stock magnum springs? I have had the stock cam reground to pretty much comp xe268 specs. I would like to get Hughes springs and retainers but on a college ramen noodle most of the week budget, I can't afford them. All my research on this has came up with "I've heard that you can", I haven't seen definite answers as of yet.
     
  2. Shainesboostin

    Shainesboostin Well-Known Member

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    In for responses. Not sure if there "LS1" stuff, but a few locals here do run Chebby stuff on there mag heads.
     
  3. rumblefish360

    rumblefish360 So close, yet so far away FABO Gold Member

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    I thought I read an article on that some time ago. You will have to start with the springs dimensions for the Magnum and the LS head. Installed height, width and lock/retainer to use. How many grooves on the valve stem? What's available?
     
  4. Dustert73

    Dustert73 Stripping bolts since ‘10

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    I'm going to look more into this. Seen that mopar 2.2 retainers allowed you to use a more standard cylindrical spring. Doesn't have to be a ls1 spring either, whatever works for the least amount of money is what I'm going for
     
  5. Bulldozer

    Bulldozer free ice cream sandwiches

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    Magnum springs aren't made of gold. Why are you trying to use something different?. Hell you could shove half of them in your pocket and give 2.00 for the other 8 at Pull-n-pay
     
  6. mderoy340

    mderoy340 Well-Known Member

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    • Dustert73

      Dustert73 Stripping bolts since ‘10

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      I have stock magnum springs on the heads now. Looking for a possible cheap upgrade to handle the cam better
       
    • Johnny Mac

      Johnny Mac www.blueprintengines.com FABO Vendor

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    • rumblefish360

      rumblefish360 So close, yet so far away FABO Gold Member

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      This ^^^^^

      Because it is crazy cheap and less mass to move around.
       
    • Dustert73

      Dustert73 Stripping bolts since ‘10

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      Now seeing that stock magnum installed height is 1.64, ls series springs are 1.80 installed height. I would think that would cause binding even on lower lift cams?
       
    • rumblefish360

      rumblefish360 So close, yet so far away FABO Gold Member

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      Longer valve useage???????

      Behaive springs come in assorted sizes as well.
      Retainers as well. They can change a few things around.
       
    • Dustert73

      Dustert73 Stripping bolts since ‘10

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      Found these; edelbrock 5812. Installed height of 1.67, OD 1.435, ID 1.041, open pressure 185, installed pressure 80. Not sure if those pressures are adequate for the cam, but the measurements are awful close to magnum specs. And with a 20% off (access20) and a speed perks 5$ off 20$ through advance auto that cuts the price down to 47.19. A price I can do something with.

      Another big speed bump is the retainer. I seen over on moparts that the gm 3100 retainer might be able to be used? Not sure as of yet.

      image.png

      image.png
       
    • turboking15

      turboking15 Well-Known Member

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      I use ls6 springs and retainers in my mag heads. You will need the tool to cut the spring pocket id down. I also cut the pocket depth down a little to get a 1.700" install height. Current cam is 242/248@.050 .550/.555 lift, it has seen 7200 rpms.
       
    • TrailBeast

      TrailBeast AKA Mopars4us on Youtube

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      I have a brand new, never run set of springs retainers locks and stem seals from a set of EQ magnum heads.
      After receiving the heads I pulled them and replaced em with Hughes stuff.

      Pay the shipping and they are yours. (Ramen pricing:D)

      Message if interested.
       
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      • TrailBeast

        TrailBeast AKA Mopars4us on Youtube

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        Couldn't send a pic via message, but I went out and got them to be sure everything was there.
        16 springs (slight conical)
        16 retainers
        32 lock halves
        16 positive stem seals
        Open pressure on these is supposed to be in the 300lb range.
        120 closed and a max safe lift of .480-.490


        I have been paid forward by members here, so now it's your turn. :D

        eqsprings1.JPG
         
        Last edited: Dec 1, 2016
      • xLURKxDOGx

        xLURKxDOGx "An angel fat, at satan's feast" FABO Gold Member

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        If he didnt take it i will pay you for them.

        Jake
         
      • TrailBeast

        TrailBeast AKA Mopars4us on Youtube

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        They are on their way out to Duster73 in the morning, but thank you
         
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        • xLURKxDOGx

          xLURKxDOGx "An angel fat, at satan's feast" FABO Gold Member

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          Cool.
           
        • jos51700

          jos51700 Hemi Orange you glad it isn't a political avatar?

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          I want beehive springs and itty bitty retainers because it just makes sense. This was surprisingly hard on magnum heads to do last time I looked into it a few years ago. Maybe it's easier with edelbrocks.
          I wish I knew who came up with the beehive spring instead of the bigger bigger bigger springs problem of the late '80's.

          I should just go to pick n pull and pop apart some stuff to see if the 3100 parts work.
           
        • MOPAROFFICIAL

          MOPAROFFICIAL FABO Gold Member FABO Gold Member

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          Agree. best thing to do is to put +.100 long 11/32 sbc stem valve into them and get into the 1.725 range. Then you can implement +/-.050 locks and or shims.
           
        • rumblefish360

          rumblefish360 So close, yet so far away FABO Gold Member

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          Interesting.......
           
        • Krooser

          Krooser Reform School Graduate

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          Ancient post... But the op would have to have new guides to use 11/32 valves.
           
        • Dustert73

          Dustert73 Stripping bolts since ‘10

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          Back from the dead! Just as an update for this thread I ultimately went with the Hughes 1110 (from memory) springs after I had a valve spring break on me unfortunately. That 360 is still installed and running in my car after 4 hard years. I like to run it hard lol.

          Thank you trailbeast for helping me all those years ago, I very much appreciate it and you.

          Currently welding subframe connectors on the duster and building a 340 six pack for it. With the 2.02 J heads I bought from you rumblefish. They are assembled and ported to the best of my ability and ready for installation btw
           
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          • rumblefish360

            rumblefish360 So close, yet so far away FABO Gold Member

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            Oooooo yeaaaaa, I remember those J heads. I hope they fit the bill well.
             
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            • Dustert73

              Dustert73 Stripping bolts since ‘10

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              Another classic example of people being generous on this forum. Those J heads were crazy cheap. Thank you for that
               
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