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DIff bush upgrade ?

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  • moatilliatta
    replied
    Originally posted by nando View Post
    yeah, I can confirm my stock rear bushing was solid. Also supposedly it's offset for the ix ride height.
    Thats what I was going to chime in and say as the subframe bushings lower the subframe.

    But I have seen solid E30 diff bushing on non IX cars.

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  • nando
    replied
    yeah, I can confirm my stock rear bushing was solid. Also supposedly it's offset for the ix ride height.

    Leave a comment:


  • digger
    replied
    Originally posted by moatilliatta View Post
    Solid E30 is IX?
    Seems to be that way

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  • moatilliatta
    replied
    Solid E30 is IX?

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  • digger
    replied
    i think this is the order of stiffness of the bushes

    Solid E30: 33171134802

    Z3M: 33172228425
    Stock E30: 33171135242

    the solid E30 seems stiffer than Z3M but it aint any cheaper

    Leave a comment:


  • nando
    replied
    stock Z3M.

    poly in my experience end up distorting too much and offers little benefit over stock if it's soft enough to not be annoying.

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  • dadsbmw
    replied
    I have poly diff bushings and notice basically no increase in NVH

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  • digger
    replied
    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

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  • moatilliatta
    replied
    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/

    Leave a comment:


  • reelizmpro
    replied
    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.

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  • Victell
    replied
    Is a diff bushing upgrade only for increased power or does it also affect handling?

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  • digger
    replied
    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

    Leave a comment:


  • digger
    replied
    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?

    Leave a comment:


  • moatilliatta
    replied
    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

    Leave a comment:


  • Staszek
    replied
    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

    Leave a comment:

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