No wastegate sound...

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  • Jamo
    Retired OG Mod
    • Mar 2004
    • 21750
    • Country: United Kingdom

    #16
    Well if he was hearing sound under boost it was cone induction noises lol craziness description at least got to the bottom of this baffling thread

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    • mcandmar
      S2Forum Zealot
      • Apr 2004
      • 5118
      • Country: Ireland

      #17
      He may have heard the recirc valve open with a cone filter, i noticed when i switch from a stock airbox to an RS2 one i can hear it.
      91CQ20v - Gone to a new home
      93UR-S4 - The Magic Carpet
      94S2Bus - The Emerald Express

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      • driftin jo
        S2Forum Fiend
        • Sep 2007
        • 2222
        • Country: United Kingdom

        #18
        Yes, you can hear it more with the RS2 airbox, especially if you have the RS2 turbo as well and your changing gear at 1.85 bar.

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        • willg54
          S2Forum Fiend
          • Jun 2009
          • 2055
          • Country: United Kingdom

          #19
          jamo...no offense but im not that stupid. i know what induction sound is and what i meant, i just got the terminology wrong.
          1996 Audi S2 - 295bhp and 326lb/ft - Complete Rebuild Project

          1994 Audi 80 - 2.0 8v (slow but reliable!)

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          • Jamo
            Retired OG Mod
            • Mar 2004
            • 21750
            • Country: United Kingdom

            #20
            So what noise were you hearing under boost then?

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            • driftin jo
              S2Forum Fiend
              • Sep 2007
              • 2222
              • Country: United Kingdom

              #21
              Fight fight fight

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              • QuattroFever
                S2Forum Extremist
                • May 2006
                • 1360
                • Country: United Kingdom

                #22
                Loose wastegate bolts or nackered gasket where it bolts to the top of the manifold by four studs. That can let out a chatter on boost as it's modulating.
                Volcano ABY coupe

                Ant

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                • willg54
                  S2Forum Fiend
                  • Jun 2009
                  • 2055
                  • Country: United Kingdom

                  #23
                  thanks to everyone who helped! always grateful
                  1996 Audi S2 - 295bhp and 326lb/ft - Complete Rebuild Project

                  1994 Audi 80 - 2.0 8v (slow but reliable!)

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                  • Sleeper_Avant
                    S2Forum Fiend
                    • Mar 2009
                    • 2372
                    • Country: England

                    #24
                    Wastegate chatter/wastegate stall (al be it wether its internal or external for some reason) gives the choochoochoo noise we all love, unless the shirt lifters enjoy the sound of heavy commercial vehicles PTSSSCHHHHH every gearchange lol

                    having a closed intake lets no sound escape, yet open/cone type filters lets sound and forced air escape (but with no filter or inlet on a turbocharger you will not experience any noises!)

                    I also sent you a PM
                    1993 URS4 Avant Emerald Green 350+bhp
                    1991 Ford Sierra Sapphire 4x4 in Magenta
                    BoooOOOSSSSSTTTT BANG BANG CHIRP CHIRP

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                    • Ross
                      S2Forum Possessed
                      • Aug 2005
                      • 3399
                      • Country: England

                      #25
                      Massive reduction in noise from the DV going from a cone to the RS2 airbox... BTDT. Fitting a foam air filter gives you a nice balance - i.e. you can hear it but it's subtle. With my dahlback induction kit you could make people jump out of their skin shifting with midrange boost!
                      AUDI - saving Dad's from minivans since 1994

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                      • driftin jo
                        S2Forum Fiend
                        • Sep 2007
                        • 2222
                        • Country: United Kingdom

                        #26
                        Originally posted by Sleeper_Avant
                        Wastegate chatter/wastegate stall (al be it wether its internal or external for some reason) gives the choochoochoo noise we all love, unless the shirt lifters enjoy the sound of heavy commercial vehicles PTSSSCHHHHH every gearchange lol

                        having a closed intake lets no sound escape, yet open/cone type filters lets sound and forced air escape (but with no filter or inlet on a turbocharger you will not experience any noises!)

                        I also sent you a PM
                        You are talking bolocks ,There is no such thing as waste gate chatter , they don't make any noise . The only time you would know your wast gate had opened is if you have a screemer pipe. The noise you are describing made by the turbo on S1 rally cars because they did not run a dump/recirc valve. The noise is caused by pressure backing up through the turbo compressor when they shut the throttle.
                        How does having no filter on a turbo mean you will have no noise ? The noise is the recirc valve dumping air back into the inlet of the turbo so the less filter/intake you have the more you will hear the noise.

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                        • pixsaudisex2
                          S2Forum Possessed
                          • Sep 2004
                          • 3110

                          #27
                          Chill out people feel the love...

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                          • QuattroFever
                            S2Forum Extremist
                            • May 2006
                            • 1360
                            • Country: United Kingdom

                            #28
                            Originally posted by driftin jo
                            You are talking bolocks
                            don't sugar coat it.

                            I wish politicians spoke like that.
                            Question time would be amazing.
                            Volcano ABY coupe

                            Ant

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