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Thread: Upgrading axles

  1. #1
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    Upgrading axles

    Hi,
    on the N54, are there any things you can do to upgrade axles yourself? i.e. Make them stronger.
    I know there are various aftermarket axels that can be bought but I'm not aware of any offered here in England so I wondered if there's anything that can be done with stock axles, or do any larger axles also fit the N54? Like something found in some of the M cars. I'm not aware of any.

    Thanks
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    Something to make the actual OEM axles stronger? Can't think if what that would be. Cryo-treating, etc. is all I could think, but quite possible it's already been done by BMW, or would offer negligible strength increase.
    Or do you mean swapping in axles from another BMW model/ M car? Doubt there's any that will fit, I think the M cars are usually different length and spline-cnt, IIRC. i.e. don't think M3 axles will work without the M3 diff.
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    im sure they can be shipped to england. Nothing can be done to the stock axles that makes financial sense.

    http://www.teammfactory.com/catalog/...y/racing-axles
    I believe dss makes axles as well

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    Yeah, I would totally just buy some upgraded ones from DSS or the like, if I was breaking axles.

    Seems like you could get them over there but, being in England, your government will make you pay through the nose on shipping/taxes IIRC. Click here to enlarge
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    It’s only about 100 for import tax on the Mfactory axles iirc from when I bought mine.

    It’s a real shame there not available through Mfactoy Europe!
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    Click here to enlarge Originally Posted by E92 420 Click here to enlarge
    It’s only about 100 for import tax on the Mfactory axles iirc from when I bought mine.

    It’s a real shame there not available through Mfactoy Europe!
    Thanks. That's not bad at all.

    Yeah it'd be nice to see them on a European site.
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    You can use m3 axles if you can get an m3 diff. You’ll need a custom driveshaft though

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    That is most peoples solution for high HP drag strip launches especially with street tires at a certain point the stock diffs input shaft will break

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    Click here to enlarge Originally Posted by Optigrab Click here to enlarge
    That is most peoples solution for high HP drag strip launches especially with street tires at a certain point the stock diffs input shaft will break
    Are you saying the axles break sooner with street tires vs DRs/slicks, i.e. due to wheelhop?
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    Click here to enlarge Originally Posted by LessIsMore Click here to enlarge
    Are you saying the axles break sooner with street tires vs DRs/slicks, i.e. due to wheelhop?
    just saying there is more stress on the system with street tires and hard launches vs smaller sized DR where the sidewall of the tire will flex. After the axles the next weak point in the system is stock diffs input shaft especially if we are talking about drag racing and launching hard from a stop.

    What you need to worry about upgrading depends on what you want to do with the car and your power levels

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    Click here to enlarge Originally Posted by Aus335iGuy Click here to enlarge
    You can use m3 axles if you can get an m3 diff. You’ll need a custom driveshaft though
    Yeah I don't want an m3 diff. I'm dct. Drive ratios are way different.
    Best:11.79@119mph on stock turbos.
    11.74@129 on GCs.
    FBO+Meth Port injection, GC Turbos, custom bucketless stage2, JB4, Trebila flash.

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    Im DCT as well, they have a habit of breaking pinions. Either way your going to want an LSD. There are some old BMWs that have 210mm pinion in an acceptable 2.81 ratio for DCTs that’ll bolt in to an M3 diff BTW.
    Also F30 diffs will fit in an e9x with a diff cover changeover. F80 diffs will also fit but the adjustable LSD is an issue, it needs a controller that can interface with the car.

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    It's usually the RACE that breaks in these axles not the axle bar itself. That's what DSS and Mfactory change on them.
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    Yeah but then you still need bigger axles etc .
    The e34 540i diff is 2.81 and 210mm in size so will fit in an e9x m3 diff and is tolerated by the DCT TCU.
    F30 M performance diffs have LSD and can be purchased brand new from a dealer.

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    No reason M Factory can't deliver them to the UK.

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