3B prop vs ABY prop

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  • Henka
    S2Forum Maniac
    • Nov 2004
    • 585
    • Home: Sweden

    #1

    3B prop vs ABY prop

    Probably a common question but I hope the twist in this one still makes it valid. First off, the difference between the two are that the ABY one is 1" shorter, right? I'm planning on building a one-piece shaft, as seen on tdif.com and motorgeek.com. Now... I would like to retain my 5-speed but have the option to go 6-speed in the future. Suppose I make a 6-speed shaft and use two 1/2" alu spacers on each end to make up for the 1" I'd be missing? What do you think?
  • S2central.net
    Retired OG Mod
    • Jul 2003
    • 16590
    • Country: Northern Ireland

    #2
    Wow - what does one build a propshaft from then ?

    Assuming there are no major mechanical issues with strength, reliability, balance or whatever then I think your suggest of using two small spacers is a good way to get you a propshaft that works with both gearboxes.

    Paul
    Paul Nugent
    Webmaster http://S2central.net
    Administrator http://S2forum.com

    1994 S2 Coupe ABY - aka Project Lazarus
    2001 A6 allroad 2.5TDi - family tank
    2003 S4 Avant 4.2 V8 - daily burble

    Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

    There are only 10 kinds of people that understand binary - those that do, and those that don't

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    • Henka
      S2Forum Maniac
      • Nov 2004
      • 585
      • Home: Sweden

      #3
      There should be no problem, at least not according to the shop I talked to. They said since I'm not going to have a lot of power, just 400-450hp, and it's fairly short... No problem. They're building it from a 3" pipe with 1.6mm thickness! At 1000hp they switch to 2.4mm thickness instead. Well, it also depends on the length of the shaft as well. Anyway, SEK3200 didn't sound too bad after all, that's like £250-ish for a light weight prop.

      Just to clarify - has anyone here meassured EXACTLY how much longer the 5:er is to the 6:er?

      Comment

      • s2driveruk
        Super Moderator
        • Jul 2003
        • 12696
        • Country: England

        #4
        I have a 5 speed in the garage awaiting my attention i can measure it tomorrow morning if u like
        sigpic

        1992 3b S2 Coupe

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        • Henka
          S2Forum Maniac
          • Nov 2004
          • 585
          • Home: Sweden

          #5
          Yes, that'd help. Now, all we need is a 6:er to meassure and we are home..

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          • aronmatic2
            S2Forum Fiend
            • Jan 2004
            • 2129
            • Country: Hungary

            #6
            you can use 200 20vt shaft(ruber bearinged side) and 3b other side.
            --------------------------------------------------------
            Real carbon parts for S2 and RS2. Check Carbondesign on facebook

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

              #7
              I would say the difference in length is going to be the same as the thickness of the gearbox spacer for the dual mass flywheel. Just a guess

              S2 Coupe 3B Project


              Ur quattro restoration

              S2 Avant

              Boost is the new rock and roll!
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              • S2central.net
                Retired OG Mod
                • Jul 2003
                • 16590
                • Country: Northern Ireland

                #8
                Like your thinking their John - its going to be there or thereabouts...


                Paul
                Paul Nugent
                Webmaster http://S2central.net
                Administrator http://S2forum.com

                1994 S2 Coupe ABY - aka Project Lazarus
                2001 A6 allroad 2.5TDi - family tank
                2003 S4 Avant 4.2 V8 - daily burble

                Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

                There are only 10 kinds of people that understand binary - those that do, and those that don't

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                • ~Delta
                  S2Forum Maniac
                  • Apr 2005
                  • 797

                  #9
                  I think even without the spacer, the 6 speed box is still longer than the 5. There are quite a few members on here, running ABY cars, converted to run single mass flywheels.

                  Still running the original propshafts...

                  Will converted his 7A-engined car to 3B with 6 speed, single mass flywheel. He still had to shorten his 7A propshaft, IIRC 20mm...

                  Just a thought.
                  Never show a fool a half built house.
                  Never underestimate the power of stupid people in large groups.

                  Life is like a **** sandwich
                  The more bread you have, the less **** you eat

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                  • Henka
                    S2Forum Maniac
                    • Nov 2004
                    • 585
                    • Home: Sweden

                    #10
                    Originally posted by aronmatic2
                    you can use 200 20vt shaft(ruber bearinged side) and 3b other side.
                    Huh? Cool. To clear things out - you mean the front bit off a 200 20vT and the rear bit off a S2 3b? Veeery interesting...

                    Comment

                    • Jeffer
                      S2Forum Fiend
                      • Jul 2003
                      • 2057
                      • Country: Netherlands

                      #11
                      I used the front bit of a RS2 shaft and the rear bit from the s2 3B.
                      And I'm using a SM flywheel So that has nothing to do with it.
                      RS2 Black - stock 315 HP
                      RS2 RS blau - stock 315 HP
                      Sport Quattro - 1005 HP
                      High Octane website

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                      • ~Delta
                        S2Forum Maniac
                        • Apr 2005
                        • 797

                        #12
                        Originally posted by Jeffer
                        I used the front bit of a RS2 shaft and the rear bit from the s2 3B.
                        And I'm using a SM flywheel So that has nothing to do with it.
                        Never said dual / single mass flywheel dictates the prop length. I did say however, it DOES dictate the use or non-use of the engine-to-transmission spacer...
                        Never show a fool a half built house.
                        Never underestimate the power of stupid people in large groups.

                        Life is like a **** sandwich
                        The more bread you have, the less **** you eat

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                        • A1quattro
                          S2Forum Maniac
                          • Jul 2006
                          • 789
                          • Country: United Kingdom

                          #13
                          henka

                          hi, as I rally a ur, I am very interested in saving weight on the car [and navigator]. how much weight is saved by the light weight prop, also dont forget there is some room for ajustment on engine and gearbox mounts [ 5mm est].... ray

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                          • Henka
                            S2Forum Maniac
                            • Nov 2004
                            • 585
                            • Home: Sweden

                            #14
                            Don't know if you heard of this guy Mance, aka pissedoff90 aka audiwidget depending on forum. He claims his new setup weight 9lbs plus joints. Now, the stock weighs like 35lbs... And it's reprociating mass too! I'll be using it on my track car!

                            Did you know that on the A2 Audi used a one-piece prop?

                            Anywho, still need a meassurement of the 6-speed shaft if anyone has got a prop laying around. I do think it was 20mm but I'm not sure. This would mean two 10mm spacers on each end which I hink it doable.

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