7A pistons in AAN

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  • doncecone
    S2Forum Fanatic
    • Jun 2013
    • 90
    • Country: Bulgaria

    #1

    7A pistons in AAN

    Hi guys,

    So gypsies stole my piston set for the AAN and i was thinking if stock 7A pistons could be used with boring the engine to 82.5. Are the made from the same material? Should I drill the hole in the 7A piston to lower the compression or use thicker gasket? Can they hold RS2 specked setup?
  • Error404
    Super Moderator
    • Mar 2007
    • 19789
    • Country: United Kingdom

    #2
    No they are not forged like the AAN pistons, you will need to machine them to drop the CR. I recon they will hold RS2 power though
    Panthero Coupé quattro 20vt
    Indigo ABY coupé
    Imola B6 S4 Avant

    Comment

    • Thuppu
      S2Forum Freak
      • Sep 2010
      • 4115
      • Country: Finland

      #3
      Quite easy to find a used AAN/ABY/3B piston set.

      Audi UrS4 Avant 2.5 20vt - twincharged - Project
      Audi 80q B4 Sedan 2.2 20vt - Daily user
      BMW 320d Touring e91 M-Sport - Daily user
      BMW 740iA e38 - Project

      Comment

      • K Simmonds
        S2Forum Zealot
        • Dec 2007
        • 7627
        • Country: Wales

        #4
        I'd be looking for a set of original forged piston's, by the time you muck about getting the 7A ones to work you'll have spent more than if you'd purchased a decent second hand set of turbo ones.

        I think Tonks may have a couple of sets knocking about, could be worth dropping him a PM.

        Bloody gypsies!
        1990 B3 2.0 80 quattro.
        1992 C4 2.8 Avant quattro
        1994 MTM RS2.
        1998 B5 TDI quattro Sport.
        2000 B5 TQS.

        Comment

        • Thuppu
          S2Forum Freak
          • Sep 2010
          • 4115
          • Country: Finland

          #5

          Audi UrS4 Avant 2.5 20vt - twincharged - Project
          Audi 80q B4 Sedan 2.2 20vt - Daily user
          BMW 320d Touring e91 M-Sport - Daily user
          BMW 740iA e38 - Project

          Comment

          • doncecone
            S2Forum Fanatic
            • Jun 2013
            • 90
            • Country: Bulgaria

            #6
            10x guys, i was thinking making the AAN 2,3 and that was the reason looking into the 7A pistons as buying and regrinding will be cheaper than buying new forged ones.

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