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    DIff bush upgrade ?

    What's the best rubber diff bush to use in a standard e30 MC diff cover and not get NVH transferred into the body but have a little bit more stiffness and better longevity in an upgrade power level?

    OE p/n seems to be 33171135242

    I've seen this mentioned apparently from Z3, is it an actual upgrade?

    33172228425

    89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

    new build thread http://www.r3vlimited.com/board/showthread.php?t=317505


    #2
    Originally posted by digger View Post
    What's the best rubber diff bush to use in a standard e30 MC diff cover and not get NVH transferred into the body but have a little bit more stiffness and better longevity in an upgrade power level?

    OE p/n seems to be 33171135242

    I've seen this mentioned apparently from Z3, is it an actual upgrade?

    33172228425
    The Z3 one is an upgrade and when you see them side by side with the original it is quite a bit stiffer. Its also way more expensive. There are poly ones that are not rough. Garagistic offers some different options.

    https://www.garagistic.com/collectio...0-e36-318ti-z3
    Euro Delivery Thread///E30 Project Klaus

    Comment


      #3
      I've been using vibra Technics on street cars.

      https://www.vibra-technics.com/bmw/z...nd_e36_compact
      https://www.ebay.com/itm/BMW370M-Vib...-/302396625587

      I was up above it, Now I'm down in it ~ Entropy - A Build thread.

      Comment


        #4
        Originally posted by moatilliatta View Post
        Are they actually OEM in feel in terms of NVH? or is that just what the marketing material says?
        89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

        new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

        Comment


          #5
          Originally posted by Staszek View Post

          The Z3 one is an upgrade and when you see them side by side with the original it is quite a bit stiffer. Its also way more expensive. There are poly ones that are not rough. Garagistic offers some different options.

          https://www.garagistic.com/collectio...0-e36-318ti-z3
          Ahh, yes $220 vs $80
          89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

          new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

          Comment


            #6
            Is a diff bushing upgrade only for increased power or does it also affect handling?

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              #7
              I got a 2 pc powerflex street poly bushing that comes with large washers for like $45 or so. Easy installation since it's 2 pc and relatively cheap.
              "I'd probably take the E30 M3 in this case just because I love that little car, and how tanky that inline 6 is." - thecj

              85 323i M TECH 1 S52 - ALPINEWEISS/SCHWARZE
              88 M3 - LACHSSILBER/SCHWARZE
              89 M3 - ALPINEWEISS II/M TECH CLOTH-ALCANTARA
              91 M TECHNIC CABRIO TURBO - MACAOBLAU/M TECH CLOTH-LEATHER

              Comment


                #8
                Originally posted by digger View Post

                Are they actually OEM in feel in terms of NVH? or is that just what the marketing material says?
                I think its the closest you can get without going poly. I wouldn't get anything garagistic.:(

                Id say its louder, if you're diff is loud you may notice it more. Check the ebay link, they are cheaper.

                But not as loud as poly, If concerned, id stick an OEM one in, I think sub frame bushings may transmit more sound.

                Keep it rubber! https://www.turnermotorsport.com/p-3...rack-e30-pair/

                I was up above it, Now I'm down in it ~ Entropy - A Build thread.

                Comment


                  #9
                  Originally posted by moatilliatta View Post

                  I think its the closest you can get without going poly. I wouldn't get anything garagistic.:(

                  Id say its louder, if you're diff is loud you may notice it more. Check the ebay link, they are cheaper.

                  But not as loud as poly, If concerned, id stick an OEM one in, I think sub frame bushings may transmit more sound.

                  Keep it rubber! https://www.turnermotorsport.com/p-3...rack-e30-pair/
                  its a "rebuilt" diff so should be fairly quiet but the reason i got this was the old was was a whiny *******ch.....i think OE Z3 may be the happy medium
                  89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

                  new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

                  Comment

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