Compression change with head gasket

Discussion in 'PSI Superchargers Tech Questions' started by Nemo963, Feb 7, 2018.

  1. Nemo963

    Nemo963 Member

    Joined:
    Aug 11, 2014
    Messages:
    31
    Likes Received:
    4
    moving to a larger blower so going from a MLS style gasket to a copper with o-ringed block/heads. I’m currently at 10.6:1 compression running a 4.584 bore .053 compressed MLS gasket with a 14.50 cc compressed volume. The copper gaskets come in a 4.57 bore .050 thick (13.795 cc) or .060 thick (17.106 cc) compressed. Assuming the .050 was the way to go just not sure how much that raises my compression...didn’t know if there was a formula to figure it out. On a big block Chevy with 4.525 bore and 4.25 stroke.
     
    #1
  2. moparchris440

    moparchris440 Member

    Joined:
    Jun 8, 2008
    Messages:
    370
    Likes Received:
    0
    ,010 gasket changes compression roughly .25 of a point
     
    #2
  3. jay70cuda

    jay70cuda Well-Known Member

    Joined:
    Sep 30, 2009
    Messages:
    1,139
    Likes Received:
    35
    I always used .010 of gamete was .3 of ratio. According to one of the top engine builders in Nhra.
     
    #3
  4. BEDNAR1320

    BEDNAR1320 Member

    Joined:
    Oct 8, 2008
    Messages:
    323
    Likes Received:
    21
    It depends on the bore and stroke of the engine in question....
    In this case .003 thinner gasket will not change CAR enough to matter
     
    #4
  5. Cpt Kludge

    Cpt Kludge Member

    Joined:
    May 15, 2009
    Messages:
    41
    Likes Received:
    3
  6. Critical Mass

    Critical Mass Member

    Joined:
    Aug 5, 2010
    Messages:
    169
    Likes Received:
    4
    We need to know your head chamber volume and piston dome volume?
    Joe
     
    #6
    Last edited: Feb 7, 2018

Share This Page