Compressed head gaskets worth it?

Discussion in 'High Performance Modifications' started by Soundwave, Oct 30, 2017.

  1. Soundwave

    Soundwave New Member

    Apr 26, 2017
    Hi Guys! Going with edelbrock 100cc heads with flat tops. Compressed head gaskets a good idea? Shouldbe 9.2 to 1 with those heads... thanks! Oh, 468 big block
  2. Mwilson

    Mwilson Veteran Member

    I pick my gasket based on piston to head clearance. Cant remember exactly I think i'm .009 piston to deck and .030 MLS gasket
  3. SRGN

    SRGN Veteran Member

    Feb 20, 2009
    Central NJ
    That pretty much covers it. Look up squish & quench on google to understand the theory.
  4. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

    Nov 4, 2004
    Ringgold, GA
    Do you mean composite head gaskets? Unless you're going to use a power adder, then no, stick with good old Fel Pro's.
  5. HawkX66

    HawkX66 Member

    Sep 20, 2017
    Don't just change you're gasket thickness without checking your piston to valve clearance.
    Mwilson likes this.
  6. G72Zed

    G72Zed Veteran Member

    Sep 8, 2015
    X2 ^^ All head gaskets compress to a point, whether it's steel shim, composition or MLS (multi layered steel). Like CorkeE said, look at Fel Pro's, the #1027 are noted as "no brinneling" on aluminum heads
  7. 70lt1z28

    70lt1z28 Veteran Member Gold Member

    Oct 3, 1999
    Beavercreek, Ohio, USA
    I would venture to say that you would be hard pressed to get a steel shim head gasket to compress much more than 0.0002. Once the beads deform, the flat steel is effectively non-compressible under bolt torque. To compress the flat steel, it would effectively be coining it and would take a few hundred TONS of pressure for an area this large.
  8. Mwilson

    Mwilson Veteran Member

    I'm not reccomending any gasket type that will be based on your application I'm only describing how I determine my required gasket thickness
  9. 70lt1z28

    70lt1z28 Veteran Member Gold Member

    Oct 3, 1999
    Beavercreek, Ohio, USA
    0.009 seems kind of thin. What is the accepted minimum? I know aluminum rod motors are much more.
  10. Mwilson

    Mwilson Veteran Member

    .009 is piston to deck my gasket is .030 for a total of .039

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