Pressurised MAFs

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  • audiman
    S2Forum Freak
    • Jul 2003
    • 4827
    • Country: United Kingdom

    #1

    Pressurised MAFs

    I need to move my MAF into the intake pipework after the IC. But i have a few questions

    How do i mount it?? As the plastic ends will not take a huge force from a hoseclip

    What do I do about a dump valve? Do i stick with a recirc. and if so where do i put the pipes???

    If anyone can get some picture of their cars that would be a real help.
    sigpic
    Tom C - www.rcmr.co.uk
    Audi UR Quattro
    Audi 100 C3 2.0 5 cyl 115ps
    Audi S2 - 07k engine project aiming for 800ps
    Audi B5 RS4 645ps 911nm
  • sorens2
    S2Forum Addict
    • Feb 2004
    • 241
    • Country: Denmark

    #2
    I will take some tomorrow, as promised. Sorry to keep you waiting.

    Søren S2
    Last edited by sorens2; 8 November 2004, 20:31.
    Audi RS4 LO550

    BTG 8:08

    www.fredslunds.dk

    Comment

    • sorens2
      S2Forum Addict
      • Feb 2004
      • 241
      • Country: Denmark

      #3
      What about this way
      Attached Files
      Audi RS4 LO550

      BTG 8:08

      www.fredslunds.dk

      Comment

      • sorens2
        S2Forum Addict
        • Feb 2004
        • 241
        • Country: Denmark

        #4
        And
        Attached Files
        Audi RS4 LO550

        BTG 8:08

        www.fredslunds.dk

        Comment

        • audiman
          S2Forum Freak
          • Jul 2003
          • 4827
          • Country: United Kingdom

          #5
          OK, so what about the diverter valve?? Are you using BOV type??
          sigpic
          Tom C - www.rcmr.co.uk
          Audi UR Quattro
          Audi 100 C3 2.0 5 cyl 115ps
          Audi S2 - 07k engine project aiming for 800ps
          Audi B5 RS4 645ps 911nm

          Comment

          • sorens2
            S2Forum Addict
            • Feb 2004
            • 241
            • Country: Denmark

            #6
            Diverter ??? What is that.
            BTW are you on ICQ ?
            Audi RS4 LO550

            BTG 8:08

            www.fredslunds.dk

            Comment

            • audiman
              S2Forum Freak
              • Jul 2003
              • 4827
              • Country: United Kingdom

              #7
              I will be in a minute!!

              Diverter = dump valve
              sigpic
              Tom C - www.rcmr.co.uk
              Audi UR Quattro
              Audi 100 C3 2.0 5 cyl 115ps
              Audi S2 - 07k engine project aiming for 800ps
              Audi B5 RS4 645ps 911nm

              Comment

              • sorens2
                S2Forum Addict
                • Feb 2004
                • 241
                • Country: Denmark

                #8
                Bov is here.
                Attached Files
                Audi RS4 LO550

                BTG 8:08

                www.fredslunds.dk

                Comment

                • audiman
                  S2Forum Freak
                  • Jul 2003
                  • 4827
                  • Country: United Kingdom

                  #9
                  So the MAF doesnt have boost then, only vacuum from turbo?
                  sigpic
                  Tom C - www.rcmr.co.uk
                  Audi UR Quattro
                  Audi 100 C3 2.0 5 cyl 115ps
                  Audi S2 - 07k engine project aiming for 800ps
                  Audi B5 RS4 645ps 911nm

                  Comment

                  • sorens2
                    S2Forum Addict
                    • Feb 2004
                    • 241
                    • Country: Denmark

                    #10
                    It is like this
                    Attached Files
                    Audi RS4 LO550

                    BTG 8:08

                    www.fredslunds.dk

                    Comment

                    • Doug_RS2
                      S2Forum Possessed
                      • Jul 2003
                      • 3847
                      • Home: Scotland Current: England

                      #11
                      Look Tom - just like my drawing I did for you!

                      If you have the maf after the turbo does that not mean you can have a dump(to air) valve?
                      S2,RS2,S4 WB,RS4,S4 B8,RS6 C5,RS6 C6,R8

                      Comment

                      • Doug_RS2
                        S2Forum Possessed
                        • Jul 2003
                        • 3847
                        • Home: Scotland Current: England

                        #12
                        One problem with this - if the air going through the MAF gets hotter(quickly) does it make the MAF reading inaccurate?

                        On the intake side the air temp is relatively consistant - on the boost side you can get +40 deg C increase through the revs on-boost?

                        What does Mihnea say to this?
                        S2,RS2,S4 WB,RS4,S4 B8,RS6 C5,RS6 C6,R8

                        Comment

                        • sorens2
                          S2Forum Addict
                          • Feb 2004
                          • 241
                          • Country: Denmark

                          #13
                          I only made small adjustments to the ECU. No problems. Even runs nice right after I moved it and no change to ECU.
                          Audi RS4 LO550

                          BTG 8:08

                          www.fredslunds.dk

                          Comment

                          • sorens2
                            S2Forum Addict
                            • Feb 2004
                            • 241
                            • Country: Denmark

                            #14
                            BTW.
                            MAF measures the amount of oxygen passing.
                            Warn air = less oxygen.
                            Cold air = more oxygen
                            Audi RS4 LO550

                            BTG 8:08

                            www.fredslunds.dk

                            Comment

                            • audiman
                              S2Forum Freak
                              • Jul 2003
                              • 4827
                              • Country: United Kingdom

                              #15
                              He isnt too sure as he has never mapped a car with it like this. intake temps will stay low on my car anyway. They never get above 30 degs, even with hard abuse!

                              Yes you do have to have a dump to air type DV. I do have one of these, but i hated the noise. Sounds like a ned car! Will have to get an HKS one or something with all my spare cash
                              sigpic
                              Tom C - www.rcmr.co.uk
                              Audi UR Quattro
                              Audi 100 C3 2.0 5 cyl 115ps
                              Audi S2 - 07k engine project aiming for 800ps
                              Audi B5 RS4 645ps 911nm

                              Comment

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