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    Vacuum lines with boost?

    Had a few questions as to what to do with vacuum lines that will be put under boost.
    First one is the PCV line, the larger hose that goes from the front of the valve cover to the bottom of the intake, I have seen people putting it back in front of the turbo but with a catch can and I don't like that idea. Is it acceptable to just run the hose to a catch can and then vent the catch can?

    #2
    Can I leave the small line going from the underside of the intake manifold to the fuel pressure regulator on the fuel rail? Will it still function being put under positive pressure?

    #3
    What should I do with the ICV? Can that be deleted so that I can just run a 90 degree silicone elbow the the throttle body? Or should it stay, but will it stand up to boost?

    #4
    Brake booster, from what I have seen on other places you can leave the booster but you HAVE to have a check valve in it. Any other thoughts on that?

    Thanks!

    #2
    I run no pcv... Though I'd run it with a catch can.

    No icv but cold starts are a bitch. Run a 90 silicone elbow and just have someone weld or jb weld the throttle body holes shut.

    Also make sure you replace or even add a check valve for the booster. I wound up sliding backwards into a guardrail during a session last night due to have zero brakes right after coming off boost (car is fine db ftw)

    FPR is fine.

    Sent from my Galaxy Nexus using Tapatalk 2
    -Build http://www.r3vlimited.com/board/showthread.php?t=295277

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      #3
      unless it's a race car, you're not going to want to delete the ICV. It poses no real problem with boost anyway.
      Build thread

      Bimmerlabs

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        #4
        I would just dump the PCV into the exhaust with something like this:

        The Source for Professional Fabrication Components in the Racing and Performance Industry.

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          #5
          I was thinking about that but I don't really it'll pull enough vac to make a difference.

          Sent from my Galaxy Nexus using Tapatalk 2
          -Build http://www.r3vlimited.com/board/showthread.php?t=295277

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            #6
            just pull vacuum pre turbo for the crank case. car idles a lot smoother with vacuum there. ICV,FPR, and brake booster all handle boost in the stock configuration


            7speedshop.com

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              #7
              Originally posted by FLG View Post
              I was thinking about that but I don't really it'll pull enough vac to make a difference.

              Sent from my Galaxy Nexus using Tapatalk 2
              It will make a little bit of vacuum but mostly it well help keep everything cleaner vs running it pre turbo.

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                #8
                Originally posted by kamotors View Post
                just pull vacuum pre turbo for the crank case. car idles a lot smoother with vacuum there. ICV,FPR, and brake booster all handle boost in the stock configuration
                Isn't this something you want to stay away from due to oil vapors?

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