2010 5.7 Hemi into 1971 Demon

New Hemi Engine Swaps

  1. champyfz450

    champyfz450 Well-Known Member

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    I've spent many hours reading the threads on this website, but I figured it best to start a new thread of my own to address any particular issues that I may have. Please let me know if any of you knowledgeable folks see any flaws in my plan.

    Heres what I have:
    1971 Dodge Demon (318/904)
    2010 eagle 5.7 truck engine (No cam or lifters as it wiped a cam lobe)
    2006 truck harness (plan to pinout the harness for my needs)
    2006 computer (I know 05 is preferred, can the 06 be used?)

    Heres what I need:
    MDS elimination kit MPR53032221AA (shophemi.com)
    Oil filter relocate MPR53021610AF (shophemi.com)
    TTI headers TTI61HC-c4 (TTIexhaust.com)
    TTI motor mounts 57MMA (TTIexhaust.com)
    Comp XFI273 Cam 249-112-501-11 (Jegs)
    Comp non MDS lifters w/eliminator kit 312-53032221AAK (Jegs)
    Milodon oil pan MIL-31000 (modernmuscleextreme)
    Milodon centre sump pickup MIL-18331
    Napa coolant Hoses NAPA9128 (upper) NAPA7515 (lower)
    Cam Phaser lockout kit CMP-5760 (shophemi.com)

    If there is anything that I am missing or if you have any questions please feel free to post it up.

    demon2.jpg
     
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    • Johnny Mac

      Johnny Mac www.blueprintengines.com FABO Vendor

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      You are mixing two very different animals.
      That cam wont go in the vvt engine. Reluctors are different also, so computer isnt correct.... gonna take some research.
       
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      • champyfz450

        champyfz450 Well-Known Member

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        Thank you Johnny. I'll look into it.
         
      • Johnny Mac

        Johnny Mac www.blueprintengines.com FABO Vendor

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        You can put an old reluctor into the new engine, but you also need a custom timing set that would allow the old computer to be used.

        IMO, You are honestly better off abandoning the harness and ecu you have, and getting an aftermarket harness/ecu for the vvt engine. Put a vvt era cam in it, even with a vvt limiter or lock.

        Vvt era oil pickup is also diff than pre 09
         
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        • champyfz450

          champyfz450 Well-Known Member

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          Thank you very much for the clarification Johnny. I have considered hotwire and Megasquirt so at some point today I will make a decision on which to use and order it up.

          Also, I lookes at a VVT compatible cam through modernmuscleextreme, are those suckers ever expensive!!! ouch!
           
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          • 408 swinger

            408 swinger FABO Gold Member FABO Gold Member

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            Best bang for the buck, 6.4 SRT auto cam. It's like 70 bucks from Mopar. I've done a couple of 5.7 VVT engines with this cam. Wakes it up! Also have used the Hotwireauto harness and computer. Easy-to-use and can keep the vvt, and, delete the MDS.
             
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            • champyfz450

              champyfz450 Well-Known Member

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              Thank you very much for that! I was researching vvt performance cams and was horrified by the price.
              So would I just pair that cam with a set of non mds lifters (since I want that removed) and use the mds eliminator kit for the plugs on top of the block?
               
            • 408 swinger

              408 swinger FABO Gold Member FABO Gold Member

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              Yep! Make sure you use Non-MDS yokes, too. The lifter bodies on the MDS are a little bigger. If you put a Non-MDS lifter in a MDS yoke, it is too sloppy. Allows the lifter to rotate slightly.
               
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              • champyfz450

                champyfz450 Well-Known Member

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                So essentially I should be looking for lifter yokes from an earlier engine, that didnt come with MDS?
                 
                Last edited: Jul 26, 2019
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                • Cudazilla

                  Cudazilla Member

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                  I believe if you go with the 6.4 cam, you also need different springs and pushrods due to the lift. Also I would go with hellcat lifters as they are pretty beefy compared to stock older versions. Maybe someone can correct me if I'm wrong but I read somewhere that dodge used msd lifters in older engines but were never activated. I haven't tore into a older block to see the lifters myself to verify this but something I read somewhere.
                   
                • Cudazilla

                  Cudazilla Member

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                  Well I corrected myself, here is a add for stock oem non msd lifters with years and applications, if that helps

                  Screenshot_20190727-060421.png
                   
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                  • champyfz450

                    champyfz450 Well-Known Member

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                    Thank you very much for that cudazilla there’s a lot of good technical info in that ad! Appreciate it.
                     
                  • Cudazilla

                    Cudazilla Member

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                    No problem, good luck!
                     
                  • champyfz450

                    champyfz450 Well-Known Member

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                    So to clarify, I will now be using the 6.4 cam with mopar non mds lifters. What about pushrods guys, will I use the early non MDS engine pushrods and valve springs?
                     
                  • 408 swinger

                    408 swinger FABO Gold Member FABO Gold Member

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                    I have put the 6.4 cam in the Eagle engines. Left the 5.7 springs and pushrods. No issues.
                     
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