deck the heads?

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HT4100 4.1, 4.5, 4.9 Discussion, deck the heads? in Cadillac Engine Discussion; i remember some where about decking the heads to get the compretion ratio up, is that just adding more gaskets ...
  1. #1
    DeVillish's Avatar
    DeVillish is offline Cadillac Owners Connoisseur
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    Jan 2003
    Okinawa japan

    deck the heads?

    i remember some where about decking the heads to get the compretion ratio up, is that just adding more gaskets to raise the head witch raises the ratio? if so how does that give me more power?

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  3. #2
    Katshot's Avatar
    Katshot is offline Cadillac Owners Master
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    Jan 2003
    Newtown, PA
    To INCREASE compression ratio, you need to LOWER the head, not RAISE it. Decking is when you mill the heads slightly to INCREASE the compression ratio. Unfortunately, that can cause a whole lot of other issues that will need to be tended to such as increased engine knock (detonation).
    Doubling up on the head gaskets is an old trick to LOWER the compression ratio so the engine is more compliant for the installation of a turbo or super charger.

  4. #3
    PONCHO's Avatar
    PONCHO is offline Cadillac Owners Member
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    Mar 2003
    correct sir.

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