In loving memory of Kenis D. Keathley 6/4/81 - 3/27/22 Loving father, husband, brother, friend and firewood hoarder Rest in peace, Dexterday

The good, the bad, and the ugly

Discussion in 'Chainsaws and Power Equipment' started by hokie94, Oct 6, 2014.

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  1. hokie94

    hokie94

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    Good deal.
     
    hokie94, Oct 31, 2014
    #61 Top
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  2. mdavlee

    mdavlee

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    I know of a few 7900s are running at .014".
     
    mdavlee, Oct 31, 2014
    #62 Top
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  3. DexterDay

    DexterDay Administrator

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    Phew.. That's tight..

    Work saws or race saws?
     
    DexterDay, Oct 31, 2014
    #63 Top
  4. mdavlee

    mdavlee

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    Work
     
    mdavlee, Oct 31, 2014
    #64 Top
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  5. Aclarke

    Aclarke

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    Excessive squish velocity from too tight a clearance increases the chance of detonation.

    Increasing the compression by means of tightening squish into the teens is counterproductive in that you are putting extra heat into the piston and head from the extra compression AND the "insulating" affect that a proper squish provides is gone, compounding the heat
    transfer.
     
    Aclarke, Oct 31, 2014
    #65 Top
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  6. Aclarke

    Aclarke

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    You're better off increasing compression by other means and keep the squish where it's productive. There are some good squish value calculators available online if anyone is interested in playing with different scenarios.
     
    Aclarke, Nov 1, 2014
    #66 Top
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