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Technical 392 overbore

Discussion in 'Traditional Hot Rods' started by 3w Hank, Oct 3, 2025 at 5:39 PM.

  1. 3w Hank
    Joined: Jan 29, 2022
    Posts: 927

    3w Hank
    Member

    On the early Hemi 392, what max bore should of experiance be done.
    Shore just a hone and custom pistons is best but now its 2025 and one find what one find.
    This is a nice block but caps is missing ( for me no problem ) and cylinders is nice but its 060 over.
    Price is not low but decent.
    -How to see this case ?
     
  2. patsurf
    Joined: Jan 18, 2018
    Posts: 2,419

    patsurf

    sleeve it and start brand new!
     
  3. gene-koning
    Joined: Oct 28, 2016
    Posts: 5,570

    gene-koning
    Member

    With it being .060 over already, I think I would spring for the cost of a sonic test to determine if there is any core shift, and find out exactly how much meat is left in the block. How much more over bore does it need? Finding the correct bore oversized pistons for that Hemi could be the limiting factor, I think I would start there.

    Having it sleeved it back to the standard bore could be a great idea. Could get costly (would save the cost of a sonic test), but that could solve a lot of problems.
     
  4. 3w Hank
    Joined: Jan 29, 2022
    Posts: 927

    3w Hank
    Member

    Its nice in hone now so I think I’ll jus need do a fresh out hone or maybe leave it.
    Ok if wall is enought its Ok but how think do one need.
    If one read on webb its sometimes noting ir max 020 and some its .120.
    To do a full 8 sleeve plus main caps is not worth it even if I can do it myself.
    Also one need stop for sleeve that mean more bore before sleeve.
    Its caps/sleeve plus Allot of time.
    -I can get a std block with caps but its way more money as seller see the case on missing caps but dont see the 60 over as a big case here so he little to high price.
    Shore I can borrow it and test ( I dont know anyone has it here but I’ll check.
    Min wall ?
     

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