OBX Helical LSD

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  • Jean
    Moderator
    • Aug 2006
    • 18228

    #1

    OBX Helical LSD

    There are a number of these on ebay for e30, new items for about $400 when you are taking a gamble with a 100-200k on a used stock S diff for $200 and up.

    Are these junk ?
    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
  • Mike325
    No R3VLimiter
    • Mar 2006
    • 3685

    #2
    Aren't these the ones out of the ix?
    Originally posted by cabriodster87
    "Honey? What color is this wire? Is it the same as that one? Are you sure? I don't believe it. OK, it works. Thank you sweetie."
    Originally posted by Kershaw
    i've got a boner and a desire to speed.

    Comment

    • Jean
      Moderator
      • Aug 2006
      • 18228

      #3
      I didn't see where it said Only for IX but you might be right. I am just thinking if a used rear end with a tired and old lsd is worth 200-400 or if it makes more sense to look for a new LSD instead if one is available that is.
      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

      • backtrail69
        R3V Elite
        • Jul 2005
        • 4471

        #4
        Both Jon Volk of 666 Fab and my friend Sam (mechanic/honda nut) said that people have been using them in drag hondas for quite a while and they have worked extremely well. You just have to replace the hardware with higher grade ARP bolts or something and to make sure everything was torqued correctly. I personally would rather not deal with setting backlash and all that stuff when you are setting up a diff. I would leave that stuff the the professionals. So, bolting in a used diff works for me.
        :: PNW Crew ::
        '87 325 4dr, '74 2002

        Comment

        • matt
          No R3VLimiter
          • Oct 2003
          • 3731

          #5
          the iX diff is Viscous, not helical.

          Comment

          • 2002maniac
            R3V Elite
            • Feb 2005
            • 4260

            #6
            I think this is supposed to be a cheaper (probably chinese) copy of the Quaife differential.

            If it offers true quaife performance at that price I would definately buy one. The real thing is ~$1400 IIRC

            What I'm afraid of is that this is a case of, "You get what you pay for"

            Comment

            • matt
              No R3VLimiter
              • Oct 2003
              • 3731

              #7
              Originally posted by 2002maniac
              I think this is supposed to be a cheaper (probably chinese) copy of the Quaife differential.

              If it offers true quaife performance at that price I would definately buy one. The real thing is ~$1400 IIRC

              What I'm afraid of is that this is a case of, "You get what you pay for"
              Ditto.

              Then again, for $400... I'm thinking about it.

              Comment

              • BrandC
                E30 Addict
                • Jul 2006
                • 444

                #8
                Originally posted by 2002maniac
                I think this is supposed to be a cheaper (probably chinese) copy of the Quaife differential.

                What I'm afraid of is that this is a case of, "You get what you pay for"
                OBX has been around a while now, so they have to at least know how to cheat people or copy high-quality products very well.

                I suppose if you ask OBX what kinds of materials they use to make the housing and spider gears you could compare it to a Quaife unit. The expensive part of the Quaife is the engineering and research that goes into making a helical unit. It's much more complicated than clutch-pack differentials in that they are designed not to wear very much/at all.


                -Brandon

                Comment

                • Jean
                  Moderator
                  • Aug 2006
                  • 18228

                  #9
                  Quaife for e30 is $1400?? wow, a friend of mine who autox with me has one on his rsx-s and it was much much cheaper than that brand new.

                  I tried to find a price online for it, 693 pounds http://www.quaife.co.uk/BMW-325i-E30...B-differential

                  It does not list the lock % though.... anybody know ?
                  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

                  • 2002maniac
                    R3V Elite
                    • Feb 2005
                    • 4260

                    #10
                    Originally posted by Jean

                    It does not list the lock % though.... anybody know ?
                    100%

                    that is the beauty of the quaife.

                    Comment

                    • Jean
                      Moderator
                      • Aug 2006
                      • 18228

                      #11
                      I am going to have to give this a second thought, maybe pick up a medium case rear diff open or lsd and then go from there with the addon obx or quaife...maybe there are other options out there.

                      Thanks guys
                      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

                      • MikeE30325i
                        Banned
                        • Aug 2006
                        • 2356

                        #12
                        My Sentra Has A Quaife Lsd In It. Very Nice.

                        Comment

                        • E30-323ti
                          Grease Monkey
                          • Feb 2004
                          • 328

                          #13
                          Originally posted by 2002maniac
                          100%

                          that is the beauty of the quaife.
                          It's not just 100% as that would be hideous off throttle & turning.

                          It is infinitely variable, torque gets split proportionately between the wheels, the larger proportion goes to the wheel with the most grip (or that can apply the most torque to the ground).
                          They are also often call TORSEN diffs, for TORque SENsing.

                          For $400 brand new, it's worth a go really!!!
                          292rwhp E30 :D

                          Comment

                          • 2002maniac
                            R3V Elite
                            • Feb 2005
                            • 4260

                            #14
                            Originally posted by E30-323ti
                            It's not just 100% as that would be hideous off throttle & turning.
                            of course. i should have been more clear. There is NO lock unless it is needed.

                            Comment

                            • Mr Deagle
                              E30 Enthusiast
                              • Nov 2006
                              • 1121

                              #15
                              someone buy it and test it for us

                              Comment

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