Any problems running pcv directly to rear of holley

Discussion in 'Street/strip 400/430/455' started by 70 GMuscle, Feb 13, 2018.

  1. 70 GMuscle

    70 GMuscle Silver Level contributor

    anyone have any problem directly running hose to rear of holley 4150 style double pumper from pcv in rear of intake on edelbrock performer?
    Throttles sticking open or anything?
     
  2. greatscat

    greatscat Well-Known Member

    No problems, if you want you can drill and pipe tap a hole at the back of the intake plenum and do it that way.
     
    Last edited: Feb 13, 2018
  3. 70 GMuscle

    70 GMuscle Silver Level contributor

    Thank you sir.
    No issues w throttle plates open for idle or anything.
    Sticking open from vacuum?
     
    Bluzilla likes this.
  4. john.schaefer77

    john.schaefer77 Well-Known Member

    That's how I run with my 4150
     
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    No, that is not an issue.
     
  6. Schurkey

    Schurkey Silver Level contributor

    There may be a slight preference for routing the PCV fumes under the primary throttle blades, so the fumes mix nicely with the incoming fuel/air mixture. However, many Holley carbs have a PCV port at the rear, and others have the PCV port boss, but it's not drilled so there's no nipple.

    Easy to drill and stuff in a press-fit 3/8 tube, or even a pipe-threaded barbed fitting, or whatever you need to make a secure connection when the boss is already in place.
     
  7. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    You can put one in a spacer as well. This is Dave Shaker's photos.

    Holley1000-3.jpg
    Holley1000-4.jpg
     
  8. 70 GMuscle

    70 GMuscle Silver Level contributor

    Thank you.
    Interesting.
    Working on some problems currently.
     
  9. Bens99gtp

    Bens99gtp Well-Known Member


    The only 2 little issues ibe seen on any of the cars I've ever done is sometimes when the hose gets replaced it thicker and can rub the bowl making it hard to line up.......the other is is any easy place to get a vacuum leak as the hose gets older and softens
     
  10. john.schaefer77

    john.schaefer77 Well-Known Member

    I switched to the sp1 and it has the hole drilled in the carb base for this.

    I did notice that the rubber hose cracked after a few years. I guess nothing is like "It used to be" anymore.
     
  11. sriley531

    sriley531 More Luck than Skill....

    I have mine run this way (sp1/Holley 4150hp) . A piece of nicely bent stainless tubing and a couple black rubber spark plugs boots makes for a clean and easy install.
     
    john.schaefer77 likes this.

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