shaving a flywheel

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  • Schnell 318
    E30 Addict
    • Oct 2003
    • 567

    #1

    shaving a flywheel

    Where can I take my stock flywheel to that will shave and balance it?
    Will an average joe transmission shop have the know how to lighten a BMW flywheel properly?
  • e30 gangsta
    No R3VLimiter
    • Jul 2004
    • 3877

    #2
    Originally posted by Schnell 318
    Where can I take my stock flywheel to that will shave and balance it?
    Will an average joe transmission shop have the know how to lighten a BMW flywheel properly?
    I took mine to miami clutch. A big clutch place down here. And they refered me to a machine shop. Just get like 4-5 pounds taken off and get it resurfaced.

    Comment

    • Digitalwave
      is a poseur
      • Oct 2003
      • 6277

      #3
      I wouldn't bring it in to your corner transmission store.

      Get a phone book and start calling local machine shops and engine builders and you will find a place that can do it. I found a machine shop in my town that did it for $120 (shaved and resurfaced).

      RISING EDGE

      Let's drive fast and have fun.

      Comment

      • Schnell 318
        E30 Addict
        • Oct 2003
        • 567

        #4
        anyone know what a safe weight to get removed is?

        Comment

        • e30 gangsta
          No R3VLimiter
          • Jul 2004
          • 3877

          #5
          Originally posted by Schnell 318
          anyone know what a safe weight to get removed is?
          4 to 5 pounds like i said.

          Comment

          • erik325i
            No R3VLimiter
            • Jan 2005
            • 3567

            #6
            I'm not sure how much the stock weight is, but I think most people bring it down to 12 Lbs.

            -Erik

            Comment

            • silverfbimmer
              Grease Monkey
              • Feb 2006
              • 309

              #7
              I thought a stock flywheel is like 24lbs. I could be wrong. I have also heard people getting them down to 12lbs also. E30 gangsta is if better to only have a few pounds shaved off?

              Comment

              • erik325i
                No R3VLimiter
                • Jan 2005
                • 3567

                #8
                Originally posted by silverfbimmer
                I thought a stock flywheel is like 24lbs. I could be wrong. I have also heard people getting them down to 12lbs also. E30 gangsta is if better to only have a few pounds shaved off?
                If you look at the flywheel, you will see a huge mass of material on the back of the flywheel. You can safely remove all of that material with no ill effects. If you do that, I think it will bring it down to around 12 lbs I think. There is no real point of only shaving off a few pounds. If you are going to do it, might as well remove all of that material from the back of the FW.

                -Erik

                Comment

                • e30 gangsta
                  No R3VLimiter
                  • Jul 2004
                  • 3877

                  #9
                  Originally posted by erik325i
                  If you look at the flywheel, you will see a huge mass of material on the back of the flywheel. You can safely remove all of that material with no ill effects. If you do that, I think it will bring it down to around 12 lbs I think. There is no real point of only shaving off a few pounds. If you are going to do it, might as well remove all of that material from the back of the FW.

                  -Erik
                  Incorrect. ( I think ) They told me max was 6 lb before the flywheels looses it rigidity and starts warping. I got a few pounds taken off and it balanced out ok. I wouldnt go more than 6 pounds on mine. Anyone wanna chime in on this.

                  Comment

                  • Digitalwave
                    is a poseur
                    • Oct 2003
                    • 6277

                    #10
                    My flywheel was 15lbs when finished, Jordan's is 12lbs. It really depends on your machinist.

                    RISING EDGE

                    Let's drive fast and have fun.

                    Comment

                    • SlammedE30
                      Mod Crazy
                      • Oct 2003
                      • 741

                      #11
                      I've got a machinist who's done about 5 or 6 E30 flywheels for me. The avg. weight ended up at 13lbs, I had mine done even lower to 11lbs. No problems whatsoever, so the estimate of 6lbs being the max you can remove is probably just to cover your machinist's ass.
                      -Ted

                      Comment

                      • sweetride01
                        Mod Crazy
                        • Apr 2004
                        • 713

                        #12
                        Is there any point whatsoever in buying a lightweight flywheel, if you can have the stock one made almost as light for 1/4 of the cost?
                        Moving sale: Everything Must Go!
                        FS: 2001 740iL Sport, low mileage..... SOLD
                        FS: 1990 Mtec II 325iS, $12,0K OVNO
                        FS: 2003 Honda Odyssey EX-L Navi..... SOLD

                        FS: New Rieger lip, lachsilber metallic (WILL INCLUDE W/e30!!)
                        FS: Very rare, new lachsilber metallic E30 Aero pack sideskirts... (WILL INCLUDE W/e30!!)

                        Extreme 325iS (well, slowly getting there, anyway)......
                        Almost too many mods to list ;-)

                        Comment

                        • Ray Smoodiver
                          Moderator
                          • Jun 2004
                          • 8809

                          #13
                          Mine went in like this at 19.35lbs:



                          Came out at 13.55lbs like this:


                          SILBER COMBAT UNIT DELTA (M-Technic Marshal)
                          RTFM:http://www.r3vlimited.com/board/showthread.php?t=56950

                          Comment

                          • Digitalwave
                            is a poseur
                            • Oct 2003
                            • 6277

                            #14
                            Originally posted by sweetride01
                            Is there any point whatsoever in buying a lightweight flywheel, if you can have the stock one made almost as light for 1/4 of the cost?
                            Most aluminum flywheels are 8lbs, you can't come close to that with a stock one.

                            RISING EDGE

                            Let's drive fast and have fun.

                            Comment

                            • erik325i
                              No R3VLimiter
                              • Jan 2005
                              • 3567

                              #15
                              Originally posted by Digitalwave
                              Most aluminum flywheels are 8lbs, you can't come close to that with a stock one.
                              Does that extra three pounds make a big difference?

                              -Erik

                              Comment

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