Anybody running 440 4006452 heads on a 383?

Mopar Performance Issues

  1. 383FormulaS67

    383FormulaS67 Bob

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    My 67 383 is .060 over, block has been decked, flat top pistons, .105 piston depth in the hole. Engine is at machine shop, and I'm try to pick heads for it. Had 516 small valves on it. I'm interested in RV heads for better cooling, unleaded fuel etc. Do not want to over spend, if that's possible. Looking for someone with 452 heads on their 383 and how they're set up/performed.... Shop said we'll need to go to dome pistons to help keep compression up. Looking into Lunati Voodoo cam 475/494 lift 262/268 duration w/323 gears. Thanks!

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    • jaws

      jaws I put the fun in dysfunctional FABO Gold Member

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      Had them on my 383 in my race car. Are you sure your pistons are a tenth down hole?(that's a lot) I was running flat tops that came .020 out, witch is factory.
       
    • twayne24365

      twayne24365 Well-Known Member

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      My 383 has 516s 2.08/1.74 valves, motor ran mid 12s in a b body.... if pistons really are that far down better stick with the closed chamber heads, spend a couple bucks in a good valve job w/ hardened seats
       
    • swing69

      swing69 fightin' socialism

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      I have a set of rebuilt 452 heads, all ready to go. Never installed. $250 if interested. I'll be headed out to Ohio in mid July to "mid Ohio" fo races, I could bring them out..........Mike
       
    • 383FormulaS67

      383FormulaS67 Bob

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      yes, shop started on it yesterday. Older rebuild from previous owner 20 plus years ago low miles overall, But was surprised on the .105
       
    • RustyRatRod

      RustyRatRod Weenie idiot loser. FABO Gold Member

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      I think 452s would ba backing up, but what do I know?
       
    • 383FormulaS67

      383FormulaS67 Bob

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      Thanks Mike will follow up
       
    • 383FormulaS67

      383FormulaS67 Bob

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      So I can just put 1.74 valves in my 516 heads and move on?
       
    • 383FormulaS67

      383FormulaS67 Bob

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      What do you mean backing up, going down in compression??
       
    • brian6pac

      brian6pac Well-Known Member

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      Yes put the big valves in the 516's, keep the closed chambers
       
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      • RustyRatRod

        RustyRatRod Weenie idiot loser. FABO Gold Member

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        Just all the way around. I much prefer a closed chamber head....and you already have them. I would put big valves in the 516s, and get a zero deck height piston for that 383. Hardened seats on a street car are really not necessary, especially as light as the A bodies are.
         
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        • 383FormulaS67

          383FormulaS67 Bob

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          Roger that, sounds good.
           
        • 383FormulaS67

          383FormulaS67 Bob

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          Thanks Rusty
           
        • RustyRatRod

          RustyRatRod Weenie idiot loser. FABO Gold Member

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          Sure. Opinions vary, and I am sure others will disagree with me, but my thinking is, you HAVE the 516 heads. To me, unless you have 2K to drop on aluminum heads, you'll come out less expensive using what you have. Unless you're trying to build a 600 HP 383, the 516s will work good with a few changes.
           
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          • fishmens67

            fishmens67 Well-Known Member

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            Part # of piston ?
             
          • 383FormulaS67

            383FormulaS67 Bob

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            True, I need to spend it wisely. I want to take advantage of the 383 and get it over 6,000 rpm. Will it be OK, with this set up?
             
          • dano

            dano Evil Handy Man

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            I'm not surprised at the 0.10" in the hole. The 440 my dad rebuilt was over 0.1" when he tore it down. KB pistons and 915's fixed it right up.
             
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            • twayne24365

              twayne24365 Well-Known Member

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              I would go 2.14/1.81 if I was paying to have it done, but all the stock iron heads are going to flow roughly the same in stock form, so the compression increase with your 516s over a set of 452s is going to help you a ton more over very few CFM of flow.
               
            • Jadaharabi

              Jadaharabi FABO Gold Member FABO Gold Member

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              67 383 was not .020 out of the hole but a 69 383 Road Runner was out of the hole.
              Next.
              Why would you want to put big valves in a small Port head.
              The 452 are great heads use them.
               
              Last edited: Apr 19, 2019
            • BigBlockMopar

              BigBlockMopar BigBlockMember

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              IMO the engine will act a low CR smogger.
              I've had an openchambered 383 once (with a mild "Roadrunner/268 dur" cam in it) and it was a turd that liked to ping easily too.
               
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              • jaws

                jaws I put the fun in dysfunctional FABO Gold Member

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                My car was a 69 Dart
                 
              • jas0162

                jas0162 Well-Known Member

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                If you put the 452 heads on a 383 with the pistons down in the hole that far the compression ratio will be around 7.5 or so. Keep the 516s if you are keeping those pistons. 383 will run great with a stock pair of 516s, a mild cam, and pistons that come up all the way.
                 
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                • RustyRatRod

                  RustyRatRod Weenie idiot loser. FABO Gold Member

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                  'Swat I've been tryin to tell him. With great resistance.
                   
                • fishmens67

                  fishmens67 Well-Known Member

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                  I have never seen a 383 with a positive deck piston from the factory, the closest I've seen is 68 hp and they were close to zero deck, but still slightly down in the hole.
                   
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                  • jaws

                    jaws I put the fun in dysfunctional FABO Gold Member

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                    3A346E98-22A4-405D-ADD9-343D3D15C1E5.jpeg BCEE1599-2EAC-4CF9-8BEA-B1F4F4685712.jpeg
                    Can’t find the order form, but they a custom JE pistons only number on them is 315F, think that is the raw forging number.
                     
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