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Mace MLS Head Gasket size for Holden VT L67 3800?

Discussion in 'Mace Engineering' started by VT CAL INT, Jan 28, 2018.

  1. VT CAL INT

    VT CAL INT New Member

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  2. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    I believe .063" is stock so using the .051" will see a slight increase in CR.
     
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  3. MACE

    MACE Well-Known Member

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    Hi VT CAL INT,

    Thanks for your enquiry.

    To build on immortality's answer, stock ecotec L67s run a head gasket thickness of approximately .062 thou. Running a thicker gasket will decrease compression, while running a thinner gasket will increase compression. For every .006" change in gasket thickness you will add or subtract approx .1 points of compression.

    Hope this helps.

    If you have any more questions please don't hesitate to ask.

    Kindest Regards,
    Steve
     
  4. VT CAL INT

    VT CAL INT New Member

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    Thanks Steve,
    - so a decrease in gasket thickness (going the 0.051 inch gasket) will increase combustion pressure, and if going the 0.063 inch gasket will keep it around stock (maybe decrease pressure by the slightest).

    This is probably a stupid question to most, but, which one is better? when should I pick the thinner gasket over the thicker? any performance gains?? do I choose based on what mods i've got?

    Thanks
    Matt
     
  5. MACE

    MACE Well-Known Member

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    Correct.

    To keep things simple, stick with the stock thickness gasket. While the thinner gasket will make more power, it will increase the likelihood of the engine pinging. Therefore you need to have a good understanding of your current application and requirements etc.

    If you have any more questions please don't hesitate to ask.

    Kindest Regards,
    Steve
     
  6. whipple v6

    whipple v6 New Member

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  7. MACE

    MACE Well-Known Member

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    Would definitely want to use these gaskets with a quality bolt or stud kit for sure.
     

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