RS2 DP Inside diameter

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  • orsum
    S2Forum Extremist
    • May 2010
    • 1213
    • Home: United Kingdom Current: South Africa

    #1

    RS2 DP Inside diameter

    The standard S4 & S6 Downpipe do they have the same diameter as the RS2 or are the basically the same as the S2 ABY.

    Can anybody advise if the RS2 2.75" DP is the inside diameter.

    Can you use the top section off an ABY DP, will that restriction be that noticeable with an RS2 setup.
    Last edited by orsum; 1 February 2017, 09:00.
  • Kiku
    S2Forum Addict
    • Aug 2010
    • 497
    • Country: Estonia

    #2
    I can mesure later evening when i get home, i have one spare.
    1990 2.2 20VT Audi Coupe Quattro
    *Hx35/k26, MaxxECU, Wagner EM/IC *RS2 Recaro *4pot-Brembo *3" turboback *Treser *Koni/H&R
    1990 Audi 200 20v Avant 2.2 20VT *7 Seater *Full electric gizmos

    Comment

    • orsum
      S2Forum Extremist
      • May 2010
      • 1213
      • Home: United Kingdom Current: South Africa

      #3
      Sell me you spare RS2 DP

      I can sell my wife if need be.
      Last edited by orsum; 1 February 2017, 12:33.

      Comment

      • A80Avant
        S2Forum Obsessed
        • Sep 2005
        • 10873
        • Country: Greece

        #4
        I think rs2 downpipe is 63mm as when I originally upgraded mine to 70mm it was larger

        Comment

        • Rikki Kitto
          S2Forum Zealot
          • Feb 2010
          • 6276
          • Country: England

          #5
          Originally posted by orsum
          Sell me you spare RS2 DP

          I can sell my wife in need be.

          Comment

          • Kiku
            S2Forum Addict
            • Aug 2010
            • 497
            • Country: Estonia

            #6
            Don't worry you dont have to sell your wife.
            Anyways pictures go 5 first are modded rs2 dp and then 3 pictures are aby dp.
            For what is worth i didnt do "IT" to rs2 dp other than v-band it.
            Inner dimensions from center are defo bigger on rs2, but i thought best is not to cut it up yet.

            If you want i can sell you that rs2 downpipe.















            1990 2.2 20VT Audi Coupe Quattro
            *Hx35/k26, MaxxECU, Wagner EM/IC *RS2 Recaro *4pot-Brembo *3" turboback *Treser *Koni/H&R
            1990 Audi 200 20v Avant 2.2 20VT *7 Seater *Full electric gizmos

            Comment

            • Cordoba16vt
              S2Forum Enthusiast
              • Apr 2014
              • 182
              • Country: Bulgaria

              #7
              Can you confirm that RS2 downpipe inner diameter at turbo flange is 58 mm , whereas AAN downpipe inner diameter at turbo flange is 56 mm? I am asking as i do intend to use the cast flange of the downpipe from my AAN while changing size of downpipe for a couple of reasons - it takes away heat from turbo , and being the same material as the hotside , expands equally as the housing so no loose nuts every 1000 km. And I am not after the last HP from the RS2 setup anyway.

              Comment

              • orsum
                S2Forum Extremist
                • May 2010
                • 1213
                • Home: United Kingdom Current: South Africa

                #8
                From the info I have been given and the part number on the cast section (857 253 171 D) that part number appears only to be that of the top cast section. ABY and RS2 have the same numbers from what I have seen.

                The complete DP ABY and RS2 have different numbers. All the same cast section diameters.

                The change takes place after the end of the cast section.

                I have not proved this 100% I am 99.9% sure of what I am saying and I will in the future be able to confirm my findings.

                Comment

                • ADP
                  S2Forum Addict
                  • Mar 2011
                  • 200
                  • Home: Bulgaria

                  #9
                  You can reweld new stainless part on your cast original flange.Use only the nickel rods!!!

                  Comment

                  • adam g
                    S2Forum Addict
                    • Feb 2007
                    • 445
                    • Country: United Kingdom

                    #10
                    The cast flange section is defo the same from aby to rs2, measuring at 56.5 mm when I swapped downpipes. I remember this as it's same diameter as my turbine wheel exducer. Obviously there will be a tolerance and a bit of carbon deposit to take into account.

                    Sent from my D5803 using Tapatalk

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