Mopar 400 block 8 sleeves

Big Block A body Tech

  1. Miszny

    Miszny Well-Known Member

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    Hello everyone!

    To start, I am in Europe and getting a 400 block here is near impossible... Importing one from USA is around 1500-1800$ after all the shipping and taxes...

    So I had an idea to sleeve it in all 8 cylinders and re-use the pistons that are already in it.
    Is there anything against what I plan to do?
    I talked to 440source about it and they told me its not a bad idea especially given that it will cost me around 1000$ done with Mahle sleeves.

    The pistons that are in it will be sent to line2line coating for ceramic coat on skirts. Normally they media blast them to get better adhesion of ceramic coating. This will give me a chance to see how good their coatings really are. The block is currently .030" over and it will not clean up at anything but .050"

    Any feedback would be nice before I start putting money into this idea ;-)

    Thank you.
     
    Last edited: Feb 29, 2020
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    • Demonracer

      Demonracer 71 Demon 00 Ram 16 Chrysler 300S 05 Caravan FABO Gold Member

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      I think you have a good idea, but I think by the time you get it all done that the expense is going to be a lot more than getting a block. You need to talk to your machinist & get a price out the door for what you want. I could be wrong on this, but those are my thoughts.
       
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      • silversedan

        silversedan Well-Known Member

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        nothing wrong with sleeves , good way to save a block.
         
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        • Plymouth 65

          Plymouth 65 Floorable Deplorable

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          Sleeves are fine, the cost of doing all 8 needs to be confirmed before deciding to go that route. 65'
           
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          • fratzog lover

            fratzog lover Well-Known Member

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            Sleeves get a bad rap because they are not "factory." There is a reason racers use them. Machining costs are your main concern, properly installed, that block will be plenty strong.
             
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            • rumblefish360

              rumblefish360 So close, yet so far away FABO Gold Member

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              I’ll consider the machinist is not only capable but a really good machinist that can get it done right on the first go around.

              Cost is the draw back. That’s it.
               
            • Sedanman

              Sedanman 67-9 Valiant specialist

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              Are you in Poland? There is a shipper near me that is always shipping cars,bikes,boats and farm equipment to Poland in containers weekly. They might ship you one cheaper than that.
               
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              • krazykuda

                krazykuda Well-Known Member FABO Gold Member How-To Section Editor

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                Sleeves are good when you have a runny nose and no kleenex....
                 
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                • Miszny

                  Miszny Well-Known Member

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                  I just talked to machine shop today. For 8 sleeves, decking and hone align mains + crankshaft finish they want 1400$.
                   
                • Miszny

                  Miszny Well-Known Member

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                  Thanks but I learned not to trust people the hard way. I would need to find a block close to someone I know in USA to really know the condition. This complicates things further. Also shipping within USA is CRAAZY expensive. For shipping of 2 Indy heads, intake and some smaller bits I paid 300$. I can’t imagine how much shipping of cast iron block would be. Also packing it would probably cost and it seems that good 400 block is not cheap either.
                  Adding it all up makes me want to go with the sleeves...

                  Yes I am In Poland.
                   
                  Last edited: Feb 29, 2020
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                  • Miszny

                    Miszny Well-Known Member

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                    Yes its an old machine shop with guys my fathers age that do this longer that I live, I’m not worried about their experience and expertise. Price is good because I know them for years and I do everything there...
                     
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                    • AndyF

                      AndyF Well-Known Member

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                      I have a 400 block sitting on a pallet waiting to go to the scrap yard that you could have for free if you were local. I'm tossing it because the cylinders are too thin for a stroker. I'd never put multiple sleeves in a 400 block but I guess you have to do what you have to do.
                       
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                      • Miszny

                        Miszny Well-Known Member

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                        Where I am the options are limited... Wish I had the market you guys have.
                        My next step is getting aluminum block. Big expense for me but seems more future proof.
                        Just got full Indy top end ported by Nick Wilson. It’s new and spent some years waiting for project that never happened.
                        Took my old top end off and discovered what I discovered...
                        What is the problem with sleeving this block in your opinion?
                         
                      • EchoSixMike

                        EchoSixMike Well-Known Member

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                        We just put 8 sleeves in a megablock because it wouldn't go 4.500. If you know everything else is good, sleeve away. S/F....Ken M
                         
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                        • RustyRatRod

                          RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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                          So bore it .060 and call it a day. Is this a trick question?
                           
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                          • Miszny

                            Miszny Well-Known Member

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                            Question is what is stronger, sleeved block or .060 over? Whoever I talk to tells me sleeved...
                             
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                            • rumblefish360

                              rumblefish360 So close, yet so far away FABO Gold Member

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                              The thicker the cylinder walls the better.
                               
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                              • bobscuda67

                                bobscuda67 Well-Known Member

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                                I have a 400 block sitting in my garage. Its stock bore and should clean up at .030 easy. Maybe even .020.
                                It was gonna go into my car but I know now it'll never happen.
                                 
                              • famous bob

                                famous bob mopar misfit

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                                Alot of nhra racers sleeve blocks right off the git go , better material , and thicker , and perfectly uniform w/ no thin spots .
                                 
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                                • IQ52

                                  IQ52 Well-Known Member

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                                  When my family ran in NASCAR with factory blocks, the first thing that happened to them was all 8 cylinders were sleeved.
                                   
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                                  • yellow rose

                                    yellow rose Overnight Sensation

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                                    Sleeve it and don't look back.
                                     
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                                    • rumblefish360

                                      rumblefish360 So close, yet so far away FABO Gold Member

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                                      And don’t even think about it.
                                       
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                                      • Miszny

                                        Miszny Well-Known Member

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                                        Is there standard for sleeve wall thickness? Should I worry about it or I just overthink this?
                                         
                                      • Miszny

                                        Miszny Well-Known Member

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                                        Please send me PM about it, I see you are in MI, perhaps we can work something out. I will sleeve the block in this topic but who knows, perhaps we can work out a deal.
                                         
                                      • rumblefish360

                                        rumblefish360 So close, yet so far away FABO Gold Member

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                                        Your over thinking this and worried and I get it. I understand. Been there myself. NO worries.

                                        Sleeves will come in all sorts of lengths & thickness. Your machinist will look up what is available and bore the engine out as far as practical to accept the sleeve.

                                        Once it is done, it will hold a lot more power than a big overbore and last a long time.
                                         
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