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Technical Pistons down in the hole variance

Discussion in 'The Hokey Ass Message Board' started by 30tudor, May 23, 2020.

  1. ekimneirbo
    Joined: Apr 29, 2017
    Posts: 1,102

    ekimneirbo
    Member
    from Brooks Ky

    So you are saying you just assume piston to head clearance and valve to piston clearance should be taken for granted and let the chips fall where they may,.......


    Edited ...
     
    Last edited: May 25, 2020
  2. saltracer219
    Joined: Sep 23, 2006
    Posts: 749

    saltracer219
    Member

    Depends if you trust your machinest. If the answer is no than maybe you need to find another one. . 010 difference on a street engine is just fine. I would be way more concerned about combustion chamber size if you are that worried about static compression.
     
    30tudor likes this.
  3. ekimneirbo
    Joined: Apr 29, 2017
    Posts: 1,102

    ekimneirbo
    Member
    from Brooks Ky

    It's not about static compression, it's about insuring that part tolerance stack up in components purchased from different sources don't cause harm to each other. It's possible that the .010 difference may not be the only issue. Maybe the deck is .010 too short and a reconditioned rod is a little longer, and the crank journal is not indexed perfectly......all those things can stack up. If you don't check.......you don't know.
    Lots of engines have been thrown together without checking much and lasted a long time. The law of averages says it will work......the law of averages also says sometimes it won't.
     

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