Magnum valve springs

Discussion in 'Magnum Engine Swaps' started by motorpirate, Aug 6, 2018.

  1. motorpirate

    motorpirate serial mopar owner

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  2. Abodybomber

    Abodybomber Breaking street machines , since 1983.....:)

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    Hughes Engines 1110 with matching retainers ,my good man.
     
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    • jdsduster

      jdsduster Well-Known Member

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      i have the stock springs off a 300 hp 360 crate magnum.your welcome to them
       
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      • motorpirate

        motorpirate serial mopar owner

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        That would be awesome!!!
         
      • motorpirate

        motorpirate serial mopar owner

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      • 93ragtop

        93ragtop Well-Known Member

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        I may be wrong, but double check those 360 300 hp crate engine springs.
        I believe those are stock springs, and your cam has .517 lift with the factory magnum rockers.....
        IMO that is way too much lift for stock springs.
        Again, ask others who know, but that is my understanding......
         
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        • motorpirate

          motorpirate serial mopar owner

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          these will be for the factory EFI Durango cam only. We will be going with the Hughes versions when the cam change happens next year.
           
        • Bobzilla

          Bobzilla Well-Known Member

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          The 2002 Mopar Performance catalog says the service part number valve spring for both the 300hp and 380hp crate engines was part number P5249464, so it should work perfectly for a stock Durango camshaft.
          The problem is the retainers. The crate motors and service heads all used different retainers than factory Magnum beehive setup. Just have jdsduster check the springs he offered are straight, not beehives, and that will verify it.
           
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          • motorpirate

            motorpirate serial mopar owner

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            Here us what I have 20180111_092837.jpg
             
          • motorpirate

            motorpirate serial mopar owner

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            Did I read on here somewhere the P springs were used with 2.2 retainers??
             
          • MoparLeo

            MoparLeo NRA PATRON LEVEL LIFE MEMBER FABO Gold Member

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            What is wrong with the stock springs ?
             
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            • motorpirate

              motorpirate serial mopar owner

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              Too lite for any real RPM and no factory computer/rev limiter to protect them.
               
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              • mderoy340

                mderoy340 Well-Known Member

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                Yes the 2.2 works and the 300 crate has the upgraded springs.
                 
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