M20 clutch on a S50 motor?

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  • lolcantturn
    R3V Elite
    • Oct 2010
    • 4588

    #1

    M20 clutch on a S50 motor?

    I have two pairs of new complete clutch kits, I'm giving my friend a new OEM Sachs M20B25 clutch and new PP, would this be suitable on his S50 motor? or way too weak?
    Originally posted by TSI
    ♫ Rust flecks are falling on my head...♫
    OEM+
  • Jand3rson
    Banned
    • Oct 2003
    • 37587

    #2
    OEM Sachs clutch is just fine for any stock M/S5X motor.

    When you start getting into big stroked motors and/or FI, you'll want to step up to something more heavy-duty.

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    • e30rapidic
      R3VLimited
      • Oct 2003
      • 2167

      #3
      one of the straps on my brand new pressure plate snapped after 100 miles. had babied the motor until then since it was rebuilt......not to due to downshifting as some like to instantly throw out there.
      '87 325ic, powered by S50.

      Comment

      • slammin.e28
        שמע ישראל
        • May 2010
        • 12054

        #4
        In b4

        LOLCLUTCHCANTTURN.

        I would say NO.

        M20 =/= S50.
        Last edited by slammin.e28; 04-27-2012, 06:00 AM.
        1974.5 Jensen Healey : 2003 330i/5

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        • Boosted E30
          Wrencher
          • Dec 2009
          • 288

          #5
          I ran a stock m20 clutch for a year and half with over 20 track days and more abuse on the street. Took it out when going turbo and it was barely worn. I say its all up to you to make it last.

          Comment

          • drumad
            E30 Mastermind
            • Aug 2009
            • 1700

            #6
            It's fine.
            2008 335i - n54b30
            1991 318i - m52b28
            1994 fzj80 - LAND CRUSHER

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            • M-technik-3
              I waste 90% of my day here and all I got was this stupid title
              • Oct 2003
              • 18946

              #7
              Gonna say fine for the most people but for op it will turn disastrous.
              https://www.facebook.com/BentOverRacing

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              • slammin.e28
                שמע ישראל
                • May 2010
                • 12054

                #8
                Originally posted by M-technik-3
                Gonna say fine for the most people but for op it will turn disastrous.
                'Sactly.
                1974.5 Jensen Healey : 2003 330i/5

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                • lolcantturn
                  R3V Elite
                  • Oct 2010
                  • 4588

                  #9
                  Originally posted by M-technik-3
                  Gonna say fine for the most people but for op it will turn disastrous.
                  Why do you say that haha
                  Originally posted by TSI
                  ♫ Rust flecks are falling on my head...♫
                  OEM+

                  Comment

                  • Adrian_Visser
                    R3VLimited
                    • Jun 2006
                    • 2823

                    #10
                    Originally posted by e30rapidic
                    one of the straps on my brand new pressure plate snapped after 100 miles. had babied the motor until then since it was rebuilt......not to due to downshifting as some like to instantly throw out there.
                    I can think of about four separate reports of PP strap failure on s50's using M20 clutch setups I think several were cheap E-bay ones though. I would stick with OE Sachs stuff myself. Try for yourself and see OP just make sure you rev match your shifts well.

                    '89 Alpine S52 with goodies

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                    • DREWHALL
                      E30 Fanatic
                      • Feb 2006
                      • 1207

                      #11
                      I've got an F1 and it feels great/has great reviews on here and egay. I was iffy about it at first but I'll recommend it at this point. Better than the Spec I put in one of my VWs.

                      Comment

                      • RobertK
                        Kicked cancer's ASS.
                        • Jun 2005
                        • 5864

                        #12
                        Originally posted by Adrian_Visser
                        I can think of about four separate reports of PP strap failure on s50's using M20 clutch setups I think several were cheap E-bay ones though. I would stick with OE Sachs stuff myself. Try for yourself and see OP just make sure you rev match your shifts well.
                        I've actually seen it twice both with stock Sach's clutches but that was on S52 setups but I've also seen it happen on a SC'd M20

                        Comment

                        • e30rapidic
                          R3VLimited
                          • Oct 2003
                          • 2167

                          #13
                          my 100 mile detonating clutch/pressure plate was a Sachs
                          '87 325ic, powered by S50.

                          Comment

                          • lolcantturn
                            R3V Elite
                            • Oct 2010
                            • 4588

                            #14
                            Originally posted by DREWHALL
                            I've got an F1 and it feels great/has great reviews on here and egay. I was iffy about it at first but I'll recommend it at this point. Better than the Spec I put in one of my VWs.
                            How many miles have you put on it? Seems sketch. any shutter/chatter?


                            Thanks for the replys everyone.
                            Originally posted by TSI
                            ♫ Rust flecks are falling on my head...♫
                            OEM+

                            Comment

                            • MR 325
                              Moderator
                              • Oct 2003
                              • 37824

                              #15
                              M20 clutch will hold up to the S50 just fine. Good friend of mine has been running his for a couple years and the car gets abused often. Hell, I am running a stock M20 clutch on my boosted M20 and it feels perfect after 15k or so.
                              BimmerHeads
                              Classic BMW Specialists
                              Santa Clarita, CA

                              www.BimmerHeads.com

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