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Thread: moroso vacum pump & msd crank trigger

  1. #1
    Senior Member RACING JUNKIE
    Join Date
    Feb 2004
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    san antonio, texas
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    1,233

    moroso vacum pump & msd crank trigger

    what is the purpose of having a vacum pump as well where does
    a crank trigger work with the timing, building a 496EFI and notice
    some of the strong motors use the pump and a trigger, should
    i consider using these and would they benefit, thanks for helping

  2. #2
    Junior Member SHOW GUEST
    Join Date
    Mar 2006
    Location
    Kansas
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    5

    Re: moroso vacum pump & msd crank trigger

    Quote Originally Posted by signsbyesa
    what is the purpose of having a vacum pump as well where does
    a crank trigger work with the timing, building a 496EFI and notice
    some of the strong motors use the pump and a trigger, should
    i consider using these and would they benefit, thanks for helping

    A vacuum pump helps greatly with crankcase ventilation to help reduce windage. They do add 15-30 hp according to some dyno figures I have read about. Less windage, more horsepower. A crank trigger all around keeps your timing where it should be. With a proper crank trigger set up I have never seen our timing vary at all. A crank trigger will not increase horsepower, but is a reliable piece to ensure your timing stays where it should be.

  3. #3
    Senior Member RACING JUNKIE
    Join Date
    Feb 2004
    Location
    san antonio, texas
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    1,233

    lets vacum

    thanks sst521mechanic
    i have seen john cunningham build some strong sbc and each had
    a vacum pump, i think i will add it to the 496 to keep the
    motor at its best with a trigger thank again
    ernest

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