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PCV System with Holley 850

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  • #1

    PCV System with Holley 850

    How would this be hooked up?

    This 850 Holley double pumper with mechanical secondaries has no vacuum port on it for a PCV valve. There is a hole in each valve cover on the car with a grommet.

    Starting from scratch, how should this be plumbed?

    Currently, we have a plug in one side that leaks and in the other side we have a vented breather of some sort with a hose going to the air cleaner base.

    This is a non emission engine without any extra plumbing for anything.
    Tracy
    2002 C5 M6 Convertible
    1994 Z28 M6 Convertible
    Current Mods:
    SLP Ultra-Z functional ramair, SS Spoiler, STB, SFCs, Headers, Clutch, Bilstein Shocks, and TB Airfoil. 17x9 SS rims with Goodyear tires, 160F T-Stat, MSD Blaster Coil, Taylor wires, Hurst billet shifter, Borla catback with QTP e-cutout, Tuned PCM, 1LE Swaybars, 1LE driveshaft, ES bushings, White gauges, C5 front brakes, !CAGS, Bose/Soundstream audio, CST leather interior, synthetic fluids
    Tags: None
  • #2
    Hmm... I have a 750 DP with mech. secondaries that has a PCV pipe in the bottom rear. You're sure it's not there?
    Rob B 95Z A4 Tech Page (Part numbers / locations, how to's, schematics, DTC's...) Home Page - shbox.com

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    • #3
      Originally posted by Rob B (shoebox)
      Hmm... I have a 750 DP with mech. secondaries that has a PCV pipe in the bottom rear. You're sure it's not there?
      The brake booster is hooked up to that.
      Tracy
      2002 C5 M6 Convertible
      1994 Z28 M6 Convertible
      Current Mods:
      SLP Ultra-Z functional ramair, SS Spoiler, STB, SFCs, Headers, Clutch, Bilstein Shocks, and TB Airfoil. 17x9 SS rims with Goodyear tires, 160F T-Stat, MSD Blaster Coil, Taylor wires, Hurst billet shifter, Borla catback with QTP e-cutout, Tuned PCM, 1LE Swaybars, 1LE driveshaft, ES bushings, White gauges, C5 front brakes, !CAGS, Bose/Soundstream audio, CST leather interior, synthetic fluids

      Comment

      • #4
        Ok, we've got it hooked up I think.

        In the passenger side valve cover is a PCV valve. It is connected to a vacuum port on the intake manifold. We didnt have a port big enough for the brake booster on the manifold, so we left that on the carb and put the PCV on the intake.

        In the driver's side valve cover is a breather with a hose attached to it. The hose routes to the base of the aircleaner assembly.

        Car runs great.
        Tracy
        2002 C5 M6 Convertible
        1994 Z28 M6 Convertible
        Current Mods:
        SLP Ultra-Z functional ramair, SS Spoiler, STB, SFCs, Headers, Clutch, Bilstein Shocks, and TB Airfoil. 17x9 SS rims with Goodyear tires, 160F T-Stat, MSD Blaster Coil, Taylor wires, Hurst billet shifter, Borla catback with QTP e-cutout, Tuned PCM, 1LE Swaybars, 1LE driveshaft, ES bushings, White gauges, C5 front brakes, !CAGS, Bose/Soundstream audio, CST leather interior, synthetic fluids

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