shaving a flywheel

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • sweetride01
    Mod Crazy
    • Apr 2004
    • 713

    #31
    Originally posted by aTron12
    That is helpful. So maybe I will stay at 15lbs in hopes of finding a good balance between performance and stability. I am running a stock cam...
    Yea, I'm sure 14-15 lbs should work just fine for you...
    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

    • Wh33lhop
      R3V OG
      • Feb 2009
      • 11705

      #32
      Why stop at 15? Mine's at about 12-13lbs, I've noticed zero decrease in drivability.
      paint sucks

      Comment

      • erik325i
        No R3VLimiter
        • Jan 2005
        • 3567

        #33
        If you're going to have it machined, take it down to 12-13. It would be silly to stop at 14-15.

        Comment

        • aTron12
          Member
          • Nov 2009
          • 98

          #34
          Originally posted by Wh33lhop
          Why stop at 15? Mine's at about 12-13lbs, I've noticed zero decrease in drivability.
          So, you are running a stock clutch etc, had your flywheel shaved down to 12-13lbs and no negative effects at all? Your idle is fine?

          Just being thorough here because I want to do it right the first time!

          Comment

          • sweetride01
            Mod Crazy
            • Apr 2004
            • 713

            #35
            As I mentioned, I think ~12lbs is fine with a stock cam, it's only when you start doing other things that mess with the idle that you're likely to start running into problems.
            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

            • Wh33lhop
              R3V OG
              • Feb 2009
              • 11705

              #36
              Originally posted by aTron12
              So, you are running a stock clutch etc, had your flywheel shaved down to 12-13lbs and no negative effects at all? Your idle is fine?

              Just being thorough here because I want to do it right the first time!
              I'm running a stock M50NV with a shaved-down flywheel, bathroom scale said it was 13lbs IIRC. No driveability issues at all, and it idles sort of funny but that's probably because I don't have an O2 sensor hooked up yet. ;)

              Honestly, I'd rather have a lightweight flywheel with a lumpy idle and a cam than a regular-weight flywheel. You may be able to adjust your idle speed as well, depending on how you're tuning it.
              paint sucks

              Comment

              • aTron12
                Member
                • Nov 2009
                • 98

                #37
                Great guys. Thanks a lot! I'll get back when the job is done next week. I'm replacing the clutch, shaving the flywheel and putting in a z3 1.9 shifter.

                Adam

                Comment

                • sweetride01
                  Mod Crazy
                  • Apr 2004
                  • 713

                  #38
                  Nice... I still haven't got around to putting in a short shift kit...
                  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

                  • ecalder
                    Noobie
                    • Dec 2009
                    • 29

                    #39
                    Anyone know if you can still shave the flywheel the same for an m42 with the m20 clutch/flywheel swap? I'm replacing my tranny on the m42 and thought I might as well go through with the swap... and if I'm doing the swap why not go ahead and shave it down too? Anyone have an extra one laying around btw?

                    Comment

                    • KenC
                      King of Kegstands
                      • Oct 2003
                      • 14396

                      #40
                      Fine for the M42. I have a 13lb 323 flywheel in mine.
                      Originally posted by Gruelius
                      and i do not know what bugg brakes are.

                      Comment

                      • aTron12
                        Member
                        • Nov 2009
                        • 98

                        #41
                        Drove my car around today after having the new clutch/shaved flywheel installed. The machinist shaved it down to 14LBS. He didn't feel comfortable taking it any further. I gotta say it made a really noticeable difference. The throttle response is much smoother and takes less effort to get those R3V's up. No issues with idle at all.. like not even a slight change. Drives the way a BMW should! We also installed a Z3 1.9 shifter which is a really nice addition to the experience. Slides right into gear perfectly and has a really nice tightness & quicker throw. Thanks for the advice...

                        Comment

                        • sweetride01
                          Mod Crazy
                          • Apr 2004
                          • 713

                          #42
                          Glad you're happy... I know I was when I had it shaved!
                          I still gotta do the Z3 shifter though.....
                          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

                          • lennon
                            E30 Fanatic
                            • Jun 2008
                            • 1416

                            #43
                            Originally posted by sweetride01
                            Glad you're happy... I know I was when I had it shaved!
                            hahaha

                            Comment

                            • 95///M3
                              Advanced Member
                              • Mar 2005
                              • 181

                              #44
                              As a reference... I just did this when I swapped in a 5spd. Photos:



                              Comment

                              • E30Gus
                                Mod Crazy
                                • Jun 2008
                                • 781

                                #45
                                I asked my machinist about doing this and he was more than willing but required the crank so that he could balance them together. From what I've been reading this is not necessary............... Any ideas?

                                Comment

                                Working...