7a block stroker

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  • mac2226
    S2Forum Extremist
    • Jun 2008
    • 1289
    • Country: United Kingdom

    #1

    7a block stroker

    I’m thinking of building stroker short block from a spare 7a block I have in garage. I’m using 95.5mm crank also it’s going to be turbo not n/a power would like people who have done this what rod to pistons you went for
  • A80Avant
    S2Forum Obsessed
    • Sep 2005
    • 10873
    • Country: Greece

    #2
    FCP engineering has a set they can order for you.
    I plan to do the same but with smaller pistons

    Comment

    • mac2226
      S2Forum Extremist
      • Jun 2008
      • 1289
      • Country: United Kingdom

      #3
      I’ve asked fcp already but not had a answer on rod length to use

      Comment

      • AndyP
        S2Forum Zealot
        • Feb 2004
        • 6049
        • Country: England

        #4
        I don't think FCP make a piston for this combination of parts, I think you're going to need a 144mm rod with a custom piston.
        sigpic
        1991 Audi S2 3B - 2.5 Stroker engine
        1997 A6 2.5TDi quattro avant - C4
        1976 RD250E / 350LC cafe racer

        Comment

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

          #5
          I was told that is need 144mm with custom pistons they have the spec for. Difference is the piston size which they can order as well

          Comment

          • mac2226
            S2Forum Extremist
            • Jun 2008
            • 1289
            • Country: United Kingdom

            #6
            Originally posted by AndyP
            I don't think FCP make a piston for this combination of parts, I think you're going to need a 144mm rod with a custom piston.
            Hi Andy fcp said they use 144mm rod with a custom je piston they get

            Comment

            • mac2226
              S2Forum Extremist
              • Jun 2008
              • 1289
              • Country: United Kingdom

              #7
              Originally posted by A80Avant
              I was told that is need 144mm with custom pistons they have the spec for. Difference is the piston size which they can order as well
              Yes same here

              Comment

              • Error404
                Super Moderator
                • Mar 2007
                • 19789
                • Country: United Kingdom

                #8
                Jonus has a kit for the 220mm short block.
                Panthero Coupé quattro 20vt
                Indigo ABY coupé
                Imola B6 S4 Avant

                Comment

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

                  #9
                  I have requested a set of pistons that has the 4032 T6 alloy that expands less. I don't like oil consumption. Hopefully they can make one

                  Comment

                  • mac2226
                    S2Forum Extremist
                    • Jun 2008
                    • 1289
                    • Country: United Kingdom

                    #10
                    Originally posted by Error404
                    Jonus has a kit for the 220mm short block.
                    Yes he does I’m hopeing to get to look at a set very soon thanks Alex

                    Comment

                    • mac2226
                      S2Forum Extremist
                      • Jun 2008
                      • 1289
                      • Country: United Kingdom

                      #11
                      Originally posted by A80Avant
                      I have requested a set of pistons that has the 4032 T6 alloy that expands less. I don't like oil consumption. Hopefully they can make one
                      Are they je pistons?

                      Comment

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

                        #12
                        Yes JE can make that alloy too

                        Sent from my SM-P550 using Tapatalk

                        Comment

                        • RaikAAAA
                          S2Forum Hobbyist
                          • Aug 2010
                          • 23
                          • Country: Estonia

                          #13
                          I have unicorn crank for that kind of setup, 92.8mm
                          Then u can use 144mm rod and cheap supra or tfsi piston, also positive ise u have less stress on engine, better piston speed and rod/stroke ratio.
                          Crank is original, have whole abt c5 coupe engine

                          Comment

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

                            #14
                            What's the best comp ratio to go for , for such an engine. Boost no.more than 2bar

                            Comment

                            • mac2226
                              S2Forum Extremist
                              • Jun 2008
                              • 1289
                              • Country: United Kingdom

                              #15
                              Originally posted by A80Avant
                              What's the best comp ratio to go for , for such an engine. Boost no.more than 2bar
                              The pistons I’ve been told to use are 8.5 comp

                              Comment

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