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Thread: dump valve

  
  1. #1
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    *dannyboi*'s Avatar
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    dump valve

    i have a stage 3.5 astra gsi, i think my baileys dump valve is leaking as its juddering under boost and feels like its missing. how can i check if its leaking and what dump valve do people recomend?

    i see alot of people like the forge collins one. how much and where can i get one from?

    thanks people
    Astra GSI Arden Blue
    518bhp 432 ftlb torque

  2. #2
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    GB's Avatar
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    presuming ur still running the oe valve inside the turbo then remove the baileys and fit a blanking plug for the timebeing. ideal to fault find instead of replacing with another dv.

    collins or forge are ideal brands if u do decide to go down this route but id defo get a blanking plug and just use the oe one in the turbo.

    ok you wont have the dv noise we all know and love but youll probs find the engine runs so much smoother and picks up a damn sight better

    not the answer u wanted? well in that case Collins or Forge.

    personally id go for a recirculating one inside the turbo and a blanking plug in place of the bailleys - make the most of that remap!!!!

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    afcbadam's Avatar
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    all dump valves are crap imo, they do nothing for peformance atall. my 3.5 gsi runs so much better without a baileys/collins.
    Astra T9 estate for sale, see my ebay link!

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    881thomas's Avatar
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    try doing a smoke or boost check buy pressuring the system and try and find leaking air. this can be done with a smoke probe, any air leaking out will have smoke in it.

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    where is the oe dump valve?
    Astra GSI Arden Blue
    518bhp 432 ftlb torque

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    on the turbo, black disc recessed in the turbo with a pipe coming off it that runs up the front of the block.
    Just Another GSi Build Thread (Big BHP Build) - Feedback Thread (Comments appreciated )

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    and how do i know if this is blocked? will the be a bung in it or something?
    Astra GSI Arden Blue
    518bhp 432 ftlb torque

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