Compression change with head gasket

Discussion in 'Manton Push Rods Top Alcohol Tech Questions' started by Nemo963, Feb 7, 2018.

  1. Nemo963

    Nemo963 New Member

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    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.
     
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  2. moparchris440

    moparchris440 Member

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    ,010 gasket changes compression roughly .25 of a point
     
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  3. jay70cuda

    jay70cuda Member

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    I always used .010 of gamete was .3 of ratio. According to one of the top engine builders in Nhra.
     
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  4. BEDNAR1320

    BEDNAR1320 Member

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    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
     
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  5. Cpt Kludge

    Cpt Kludge Member

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  6. Critical Mass

    Critical Mass Member

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    We need to know your head chamber volume and piston dome volume?
    Joe
     
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    Last edited: Feb 7, 2018

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