710 N valve

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  • audinut
    S2Forum Fiend
    • Jul 2009
    • 2195
    • Country: United Kingdom

    #1

    710 N valve

    Can you guys hear your 710n work?

    recently i have noticed that i can hear a woosh as if its an aftermarket dump valve , no loss in power or any other symptoms?
    NOT a car dealer! just an S2/RS2 enthusiast
  • Bullysteeth
    S2Forum Maniac
    • Jan 2012
    • 830
    • Country: England

    #2
    Yep and wastegate chatter

    Comment

    • audinut
      S2Forum Fiend
      • Jul 2009
      • 2195
      • Country: United Kingdom

      #3
      hmm the chatter might mean yours is shot mate ? when i fitted my new one it elimitated the chatter , mines literally just a whoosh sound
      NOT a car dealer! just an S2/RS2 enthusiast

      Comment

      • Rusty
        Super Moderator
        • Jun 2004
        • 18953
        • Country: United Kingdom

        #4
        Do you have a stock airbox or another setup?
        Cheers'en, AndyC
        1994 ABY Coupe - Projekt Alpinweiss

        Comment

        • Bullysteeth
          S2Forum Maniac
          • Jan 2012
          • 830
          • Country: England

          #5
          mines not that loud, just a background stissssssss, but you maybe right i need to look into my wategate, maybe its the dreaded ghost in MY machine or only a diaphram

          Comment

          • audinut
            S2Forum Fiend
            • Jul 2009
            • 2195
            • Country: United Kingdom

            #6
            stock everything
            NOT a car dealer! just an S2/RS2 enthusiast

            Comment

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

              #7
              Wastegates don't chatter, I think what you are refering to is compressor stall.

              Comment

              • Bullysteeth
                S2Forum Maniac
                • Jan 2012
                • 830
                • Country: England

                #8
                Originally posted by driftin jo
                Wastegates don't chatter, I think what you are refering to is compressor stall.
                its a fluttering sound, wots compressor stall ?
                ps sorry audinut for jumping your post bud

                Comment

                • Tony Stark
                  S2Forum Addict
                  • Nov 2009
                  • 288
                  • Country: United Kingdom

                  #9
                  On our engines what does the 710N do? When? And why?


                  Dont mean to push in, just thought ask while its on topic 'cause i dont know

                  Cheers

                  Comment

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

                    #10
                    Originally posted by Bullysteeth
                    its a fluttering sound, wots compressor stall ?
                    ps sorry audinut for jumping your post bud
                    When do you get this noise ? When you lift off or at WOT ?

                    Comment

                    • Bullysteeth
                      S2Forum Maniac
                      • Jan 2012
                      • 830
                      • Country: England

                      #11
                      Originally posted by driftin jo
                      When do you get this noise ? When you lift off or at WOT ?
                      ye, more under heavy load when i let off, i get the dv hissss not to loud, and the fuvv fuvv fuvv fuvvv type of noise !!!!

                      Comment

                      • Bullysteeth
                        S2Forum Maniac
                        • Jan 2012
                        • 830
                        • Country: England

                        #12
                        Originally posted by audinut
                        Can you guys hear your 710n work?

                        recently i have noticed that i can hear a woosh as if its an aftermarket dump valve , no loss in power or any other symptoms?
                        have you checked the pipes bud, the return may have come loose

                        Comment

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

                          #13
                          Originally posted by Tony Stark
                          On our engines what does the 710N do? When? And why?


                          Dont mean to push in, just thought ask while its on topic 'cause i dont know

                          Cheers
                          It's a diverter valve, when you shut the throttle it opens to allow air to flow form the turbo outlet back to the inlet to stop compressor from stalling, without it the pressure builds when you shut the throttle as the air has nowhere to go and stalls the turbo.

                          Comment

                          • Tony Stark
                            S2Forum Addict
                            • Nov 2009
                            • 288
                            • Country: United Kingdom

                            #14
                            Originally posted by driftin jo
                            It's a diverter valve, when you shut the throttle it opens to allow air to flow form the turbo outlet back to the inlet to stop compressor from stalling, without it the pressure builds when you shut the throttle as the air has nowhere to go and stalls the turbo.
                            Thanks!

                            Comment

                            • audinut
                              S2Forum Fiend
                              • Jul 2009
                              • 2195
                              • Country: United Kingdom

                              #15
                              Bully get yourself a new valve as what your describing is why i changed mine.

                              Personally im not getting a chatter just a whoosh of air like a after market DV when i lift off the throttle mainly in 1st and 2nd gear - my 710 is approx a month old?
                              NOT a car dealer! just an S2/RS2 enthusiast

                              Comment

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