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  1. #1
    Join Date
    Aug 2007
    Location
    Toronto
    Posts
    570

    Default Carter AFB 3921 - ported vacuum?

    Hi all,

    Re: Carter AFB 3921

    Can someone tell me if the small port on the passenger side front for vacuum advance is ported or not?

    Thank you,
    Gary
    Gary
    65 Special thin pillar 401/ST400

  2. #2
    Join Date
    Dec 2002
    Location
    Bucks County, Pa
    Posts
    5,778

    Default Re: Carter AFB 3921 - ported vacuum?

    That's the 1965 401-automatic carb. Used on several different cars, including GS. Should be manifold vacuum. I have pics of the 2 styles here:
    http://www.v8buick.com/showthread.php?t=209697
    The ported vacuum carbs have the vacuum source right at the throttle blade.
    Walt K
    (1)'66 GS Astro Blue, 13.41 et (2)'66 GS Saddle Mist, L76 Q-jet option, 1 of 132 (3)'66 GS Flame Red, Calif car (4)'66 GS Silver Mist, 4 speed (5)'66 Special, Flame Red, 300 (6)'79 Turbo Regal, 14.1 et (7)'65 GS 4 speed 'vert

  3. #3
    Join Date
    Aug 2007
    Location
    Toronto
    Posts
    570

    Default Re: Carter AFB 3921 - ported vacuum?

    Quote Originally Posted by wkillgs View Post
    That's the 1965 401-automatic carb. Used on several different cars, including GS. Should be manifold vacuum. I have pics of the 2 styles here:
    http://www.v8buick.com/showthread.php?t=209697
    The ported vacuum carbs have the vacuum source right at the throttle blade.
    Thanks Walt.
    Gary
    65 Special thin pillar 401/ST400

 

 

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