Vaccuum advance
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Vaccuum advance

  1. #1
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    Default Vaccuum advance

    My old dizzy went south. Can I use a hei with vaccuum advance on my bbc 454. what are the pros and cons.

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  3. #2
    Senior Member GT Jets's Avatar
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    Quote Originally Posted by BAJA JA View Post
    My old dizzy went south. Can I use a hei with vaccuum advance on my bbc 454. what are the pros and cons.

    Yes, I would lock out the vacuum pot...It can be removed and locked with a simple piece of aluminum, marine engines are under too large of load for the vacuum advance to work...

    If you have an enclosed engine compartment, I would discourage it totally....

    GT
    GT


    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

  4. #3
    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by BAJA JA View Post
    My old dizzy went south. Can I use a hei with vaccuum advance on my bbc 454. what are the pros and cons.
    Not likely safe and /or "Marine approved" and as Glenn said the Vac advance is of no real use ,However in a Jet boat application , if you do decide to use it/one you'll have to modify it to give a greater total centrifical advance or run quite lot of initial to get mid 30 "ish" total Tom


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  6. #4
    AKA OhOneWS6 Last Mohican's Avatar
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    I completely removed mine and locked it out with a screw. I also added a curve kit and the lightest springs.




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