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Need Vacum and PVC information

This is a discussion on Need Vacum and PVC information within the General Help forums, part of the LSx Technical Help Section category; I am building a high horse power LQ9 (two of them actually) I am running a hydroboost on both cars ...

  1. #1
    Junior Member
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    1986 Buick Regal

    Need Vacum and PVC information

    I am building a high horse power LQ9 (two of them actually)

    I am running a hydroboost on both cars do I don't need vacum for brakes, I am not running a vacum control fuel pressure regulator (using the vette one)

    The valve covers I have for both motors have no PVC or breather locations on them.

    If I am not worried about emmissions, so what or any vacum and or PVC connections do I need to worry about?

    We are using a Professional Product intake on one and a FAST on the other.

    Thanks

  2. #2
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    You need to vent the crankcase some how. If you go with a PCV system, you may need to use the LS6 or LS2 valley cover with the PCV port on it and then install a breather on the oil fill tube. What year is your LQ9?

    LS6 valley cover


    LS2 valley cover

  3. #3
    1000+ HP member SteveZ28's Avatar
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    2002 Camaro Z28

    What happens if the crank case isn't vented?

  4. #4
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    You'll blow out the valve cover and oil pan gaskets, and the front and rear crank seals. Basically it'll leak oil EVERYWHERE.

  5. #5
    1000+ HP member SteveZ28's Avatar
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    2002 Camaro Z28

    Quote Originally Posted by Cutlass View Post
    You'll blow out the valve cover and oil pan gaskets, and the front and rear crank seals. Basically it'll leak oil EVERYWHERE.
    What about condensation? Would it push moisture and/or oil up into the combustion chambers?

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