3" Turbo Back Dilemma

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  • david
    S2Forum Extremist
    • Oct 2008
    • 1268
    • Country: United Kingdom

    #1

    3" Turbo Back Dilemma

    hi guy's, i'm thinking of getting my 3" turbo back custom made.i've got someone to do it for me,but he can only weld the 3"inch just below the wastegate instead of directly behind the turbo.what do you guy's think? i know there's been alot of thread on turbo back,but your imput and advise will be most welcome.
    Attached Files
    [SIGPIC][SIGPIC]/SIGPIC]92 3B pearl white=gone back home to Germany,probably in bits and pieces

    RS2 VOLCANO BLACK] soon to be broken to bits
  • Rusty
    Super Moderator
    • Jun 2004
    • 18953
    • Country: United Kingdom

    #2
    Mine's the same as that. You could have a 2.5" to 3" cone welded to the turbo flange? Won't make a massive difference IMO unless you're going for silly power where a 3.5" DP would be better suited anyway...
    Cheers'en, AndyC
    1994 ABY Coupe - Projekt Alpinweiss

    Comment

    • david
      S2Forum Extremist
      • Oct 2008
      • 1268
      • Country: United Kingdom

      #3
      Originally posted by Rusty
      Mine's the same as that. You could have a 2.5" to 3" cone welded to the turbo flange? Won't make a massive difference IMO unless you're going for silly power where a 3.5" DP would be better suited anyway...

      that's exactly what i've ordered,2.5" to 3" cone measuring 3" in length.
      so that should not restrict the turbo then?
      Attached Files
      [SIGPIC][SIGPIC]/SIGPIC]92 3B pearl white=gone back home to Germany,probably in bits and pieces

      RS2 VOLCANO BLACK] soon to be broken to bits

      Comment

      • K Simmonds
        S2Forum Zealot
        • Dec 2007
        • 7633
        • Country: Wales

        #4
        I'm in similar position, though I'm strongly considering purchasing a TIG welder and the materials and making the system myself. the amount of money it takes to get a system made would more than cover this and I want a decent welding set up anyway.

        Regarding where to take the down pipe to 3", as Andy points out it won't make a whole lot of difference if you go 3" after the waste gate pipe and it makes it a lot easier to fabricate. Though personally I want mine to be 3" from as close to the turbo as possible with a separate waste gate pipe venting too atmosphere .
        1990 B3 2.0 80 quattro.
        1992 C4 2.8 Avant quattro
        1994 MTM RS2.
        1998 B5 TDI quattro Sport.
        2000 B5 TQS.

        Comment

        • david
          S2Forum Extremist
          • Oct 2008
          • 1268
          • Country: United Kingdom

          #5
          turbo back

          i think you save alot of money and hassle me self,if go just below the waste gate.like Rusty said it won't make alot of difference unless your're going for massive power.
          [SIGPIC][SIGPIC]/SIGPIC]92 3B pearl white=gone back home to Germany,probably in bits and pieces

          RS2 VOLCANO BLACK] soon to be broken to bits

          Comment

          • david
            S2Forum Extremist
            • Oct 2008
            • 1268
            • Country: United Kingdom

            #6
            Originally posted by K Simmonds
            I'm in similar position, though I'm strongly considering purchasing a TIG welder and the materials and making the system myself. the amount of money it takes to get a system made would more than cover this and I want a decent welding set up anyway.

            Regarding where to take the down pipe to 3", as Andy points out it won't make a whole lot of difference if you go 3" after the waste gate pipe and it makes it a lot easier to fabricate. Though personally I want mine to be 3" from as close to the turbo as possible with a separate waste gate pipe venting too atmosphere .
            purchasing a TIG welder is a good way to go,as i 'm thinking thesame way.i recently purchase a 5 meter 3" stainless of material including p&p for £80
            [SIGPIC][SIGPIC]/SIGPIC]92 3B pearl white=gone back home to Germany,probably in bits and pieces

            RS2 VOLCANO BLACK] soon to be broken to bits

            Comment

            • K Simmonds
              S2Forum Zealot
              • Dec 2007
              • 7633
              • Country: Wales

              #7
              Originally posted by david
              purchasing a TIG welder is a good way to go,as i 'm thinking thesame way.i recently purchase a 5 meter 3" stainless of material including p&p for £80
              That's a seems a very a good price for the pipe, do you know what grade stainless it is? ie 304, 314, 316 ect.
              1990 B3 2.0 80 quattro.
              1992 C4 2.8 Avant quattro
              1994 MTM RS2.
              1998 B5 TDI quattro Sport.
              2000 B5 TQS.

              Comment

              • david
                S2Forum Extremist
                • Oct 2008
                • 1268
                • Country: United Kingdom

                #8
                turbo back

                Originally posted by K Simmonds
                That's a seems a very a good price for the pipe, do you know what grade stainless it is? ie 304, 314, 316 ect.
                yeah sorry i for got to mention it,304
                the things that cost is the 45 and 90 degree bends.
                [SIGPIC][SIGPIC]/SIGPIC]92 3B pearl white=gone back home to Germany,probably in bits and pieces

                RS2 VOLCANO BLACK] soon to be broken to bits

                Comment

                • K Simmonds
                  S2Forum Zealot
                  • Dec 2007
                  • 7633
                  • Country: Wales

                  #9
                  Thanks, just adding it up in my head £350 should cover the materials then, if you want a single rear box system with a felxi join at the end of the down pipe. Depending on what you go for a second hand TIG set up could cost you anything between £200/£500 and would be generally useful piece of kit. Beats paying the best part of a grand for custom system I reckon.
                  1990 B3 2.0 80 quattro.
                  1992 C4 2.8 Avant quattro
                  1994 MTM RS2.
                  1998 B5 TDI quattro Sport.
                  2000 B5 TQS.

                  Comment

                  • david
                    S2Forum Extremist
                    • Oct 2008
                    • 1268
                    • Country: United Kingdom

                    #10
                    Originally posted by K Simmonds
                    Thanks, just adding it up in my head £350 should cover the materials then, if you want a single rear box system with a felxi join at the end of the down pipe. Depending on what you go for a second hand TIG set up could cost you anything between £200/£500 and would be generally useful piece of kit. Beats paying the best part of a grand for custom system I reckon.
                    try fleebay, you might even pick one up for cheap
                    [SIGPIC][SIGPIC]/SIGPIC]92 3B pearl white=gone back home to Germany,probably in bits and pieces

                    RS2 VOLCANO BLACK] soon to be broken to bits

                    Comment

                    • K Simmonds
                      S2Forum Zealot
                      • Dec 2007
                      • 7633
                      • Country: Wales

                      #11
                      That's where I've been looking, just waiting for funds and for something suitable to come up relativity close as I want to be able to see it working before I part with any cash.
                      1990 B3 2.0 80 quattro.
                      1992 C4 2.8 Avant quattro
                      1994 MTM RS2.
                      1998 B5 TDI quattro Sport.
                      2000 B5 TQS.

                      Comment

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