Bizarre result - Boost concern

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  • europeanme
    S2Forum Possessed
    • Oct 2005
    • 3817
    • Country: United Kingdom

    #1

    Bizarre result - Boost concern

    as some of you know I've dropped in a rebuilt engine along with a few choice additions.
    After the usual gentle running in period, I am now just pushing the revs a little higher (4-4,5K) What I am seeing is random boost readings...one day its 0.6, another its 0.8 bar and then it is 0.4.... to be honest I expect 0,4 as the N75 is disconnected but twice that is a little surprising...and what with only stock injectors and no re-map it disturbs me a little....

    any clues?....I'm running a Tial wastegate with a 0.9bar - absolute spring so I cannot suss out whats going on....

    any tips welcomed....

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

    #2
    The wastegate spring controls the crack pressure, so it's won't crack at 0.4 Bar as you have fitted a 0.9 spring If you've adjusted this, then it'll not be 0.9 bar but should be close. If it's cracking early then I'd check the spring is sat and adjusted correctly.
    Cheers'en, AndyC
    1994 ABY Coupe - Projekt Alpinweiss

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    • newsh
      S2Forum Obsessed
      • Aug 2003
      • 16226
      • Country: United Kingdom

      #3
      Boost leak?

      S2 Coupe 3B Project


      Ur quattro restoration

      S2 Avant

      Boost is the new rock and roll!
      sigpic

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      • europeanme
        S2Forum Possessed
        • Oct 2005
        • 3817
        • Country: United Kingdom

        #4
        Originally posted by newsh
        Boost leak?
        I think its along the lines as to what Andy has said....the spring is 0,9 bar of mechanical boost and that pretty much what it gets to.....it does make me nervous when it feels like it wants to keep going....

        I can't wait to map this thing!!....I'm scared now....

        Comment

        • Tonks4x4
          Retired OG Mod
          • Nov 2005
          • 3062
          • Country: United Kingdom

          #5
          VEMS!!!!
          Audi Nut!!!

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