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    High lock diffs

    Who makes these OTHER THAN OBX and Quaife, any other choices?

    The 25% lock diff is not working out that great for me on race tires.
    Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



    OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

    #2
    I hear with 4 clutches you can achieve 40% lockup. My friend had that in his obd1 S52 car and had no problem with traction. He was running bottle caps on 60 series winter tires with very worn tread.
    1985 M10b18. 70maybewhpoffury. Over engineered S50b30 murica BBQ swap in progress.

    Originally posted by DEV0 E30
    You'd chugg this butt. I know you would. Ain't gotta' lie to kick it brostantinople.

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      #3
      diffsonline. My buddy works for them. probably one of the biggest diff companys in the bmw world.

      Comment


        #4
        Anything else out there? diffsonline is pretty expensive from the quick look
        Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



        OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

        Comment


          #5
          Originally posted by Jean View Post
          Anything else out there? diffsonline is pretty expensive from the quick look
          +
          971-295-7077

          91' 318i

          Comment


            #6
            anyone using a bmw viscous diff? how are those?

            Comment


              #7
              that would be interesting. getting the rear diff out of an ix.

              they are 3.91 and are variable lock up depending on traction. 10-100%.

              im pretty sure it'll bolt into a normal e30 no problem. the rear of the ix is the same as any other e30.
              AWD > RWD

              Comment


                #8
                Has anyone done this? Pictures?
                971-295-7077

                91' 318i

                Comment


                  #9
                  Viscous diffs are not durable. Please leave them to the iX people. You'll burn up the VC faster than you'd believe possible with that kind of abuse.

                  The cheapest upgrade is an MZ3 diff. Of course, you have to be geared for it. Personally, I recommend sucking it up and going to diffsoline. The diff they built me is the best thing about the race car.
                  2006 GMC Sierra 2500HD 4WD LBZ/Allison
                  2002 BMW M3 Alpinweiß/Black
                  1999 323i GTS2 Alpinweiß
                  1995 M3 Dakargelb/Black
                  - S50B32/S6S420G/3.91
                  1990 325is Brilliantrot/Tan
                  1989 M3 Alpinweiß/Black

                  Hers: 1996 Porsche 911 Turbo Black/Black
                  Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd

                  sigpic

                  Comment


                    #10
                    Metrix Motorsport is now Precision Gearing. You can get a 40% diff for $850 or so.

                    Yoshi and Mitch wrote about diff modding a little bit on e30tech. After you filter through some of the noise, there's some useful information there.

                    The BMW helical diff as found in 98+ Z3s is made by Zexel in Belgium, and is a nice way to get a silent, low mileage, rust-free diff in a few different ratios that are interesting to E30s.

                    Originally posted by whysimon
                    WTF is hello Kitty (I'm 28 with no kids and I don't have cable)

                    Comment


                      #11
                      What ratios and lock rates were available on Z3 diffs?

                      This is still something I need to do....
                      Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                      OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                      Comment


                        #12
                        FredK, when you say "helical" does that mean it's like the "Torsen" diffs found in Miatae?
                        Need parts now? Need them cheap? steve@blunttech.com
                        Chief Sales Officer, Midwest Division—Blunt Tech Industries

                        www.gutenparts.com
                        One stop shopping for NEW, USED and EURO PARTS!

                        Comment


                          #13
                          Originally posted by z31maniac View Post
                          FredK, when you say "helical" does that mean it's like the "Torsen" diffs found in Miatae?
                          Yes.
                          paint sucks

                          Comment


                            #14
                            Oh re-he-heealllly?

                            What ratios are available?
                            Need parts now? Need them cheap? steve@blunttech.com
                            Chief Sales Officer, Midwest Division—Blunt Tech Industries

                            www.gutenparts.com
                            One stop shopping for NEW, USED and EURO PARTS!

                            Comment


                              #15
                              I run a Z3 diff in my swap car. It has pluses and minuses. The big problem is that if you lift a wheel or get in a very low traction situation, a helical/torsen/quaife diff goes open. You can abuse the parking brake to put some load on it if you need traction help in the snow, but it's not great in performance situations.
                              2006 GMC Sierra 2500HD 4WD LBZ/Allison
                              2002 BMW M3 Alpinweiß/Black
                              1999 323i GTS2 Alpinweiß
                              1995 M3 Dakargelb/Black
                              - S50B32/S6S420G/3.91
                              1990 325is Brilliantrot/Tan
                              1989 M3 Alpinweiß/Black

                              Hers: 1996 Porsche 911 Turbo Black/Black
                              Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd

                              sigpic

                              Comment

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