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    Author Topic: Vacuum for Power Brake from Manifold or Carb ?  (Read 1099 times)

    Offline LukeSkywalker

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    Vacuum for Power Brake from Manifold or Carb ?
    « on: December 02, 2013 - 06:27:11 AM »
    I've got a Holley street Dominator manifold with a 4 port carb (Holley Avenger 4150 870cfm el.choke).

    Where do you get your Power Brake Vacuum from? Manifold vac intake or Carb vac intake?

    Is there a difference?

    Currently I have mine connected to the manifold intake.
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    Offline Bullitt-

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    Re: Vacuum for Power Brake from Manifold or Carb ?
    « Reply #1 on: December 02, 2013 - 06:57:49 AM »
    Manifold vacuum for power brakes.....I have seen carbs that have manifold vacuum in the baseplate but most manifolds have a nipple or place for a nipple for the purpose. 
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    Wade  73 Rallye 340..'77 Millennium Falcon...13 R/T Classic   Huntsville, AL
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    Offline Chryco Psycho

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    Re: Vacuum for Power Brake from Manifold or Carb ?
    « Reply #2 on: December 02, 2013 - 08:50:39 AM »
    I agree , the brakes draw off the manifold , it will not affect any given cylinder where the vaccum is drawn from , the PCV should connect to the carb base so it is distributed to all cylinders evenly .
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    Offline 72cudamaan

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    Re: Vacuum for Power Brake from Manifold or Carb ?
    « Reply #3 on: December 02, 2013 - 08:52:10 AM »
    Definitely manifold vacuum. You want it unmetered so that you have as much as possible to utulize. As Bullitt said, the
    nipple at the base of the carb works, or a port on the manifold.
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    Andy  (phukker whither)

    Offline LukeSkywalker

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    Re: Vacuum for Power Brake from Manifold or Carb ?
    « Reply #4 on: December 02, 2013 - 01:57:33 PM »
    Ok. One less worry... Thanks guys. :)
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