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  1. #1
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    cheap clutch options for turbo\'ed m20?

    The stock clutch on my ix is not very compatible with boost pressures above 0.8bar, around 400Nm torque.

    So I need a stronger clutch. Only problem is finding one that is reasonably priced and that will fit inside the bellhousing, and hopefully work with the throw-out bearing.

    Stock m20 (ix) clutch:
    228mm clutch disk
    265mm mounting points for pressure plate
    flat surface
    'needs' sprung clutch disc
    looks like a 240mm clutch disc + pressure plate could fit (if mounting points for 240mm pressure plate is same diameter as 228mm)
    only good for ~400Nm, need 510Nm

    The way I see it is that I have two options.

    1) get a pressure plate + clutch disc for a s38 m5 engine
    + flat surface flywheel with sprung clutch disc, compatible with m20
    - 240mm disc, so I don't know if it will fit onto a m20 flywheel
    - expensive
    ??? diameter of mounting points for pressure plate, ie. will it fit onto a m20 flywheel?

    2) get a pressure plate for a 330d (e46 2000-)
    + cheap
    - unsprung clutch disc
    - two-part flywheel, ie. not a direct bolton to a flat surface flywheel
    - 240mm disc, however the 228mm disc two-part flywheel has pressure plate mounting points of 258mm (smaller than a 228mm disc m20) so the pressure plate for a 240mm disc might fit onto the m20 flywheel, with spacers to simulate the ridge on the two-part flywheel
    ??? diameter of mounting bolts for pressure plate


    Any more ideas where I could get a reasonably priced clutch package that will hold for 510Nm torque?


  2. #2
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    Re: cheap clutch options for turbo\'ed m20?

    Can you email me and tell me a little about your setup?
    I'm trying to get the right info toghether to come up with a kit for my 1990 325i.
    Thanks

  3. #3
    iflytii
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    Have you looked at the carbon spec clutches?

    Pretty cheap at $399 for clutch disk, pressure plate and TO bearing. Won't add an more surface area but should provide a lot more friction.

    I am going with a stage 3 for my turbo m20/2002

    http://www.specclutch.com/specMain.html

  4. #4
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    Re: Off the subject, but....

    ...is this the same "Thing-90ix" that used to post on BEN?
    -Josh

  5. #5
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    Re: Off the subject, but....

    Yeah.. this is me. I still read BEN and post occasionally.

    Got a sasch racing pressure plate, rated for 455Nm with a (stock) organic clutch plate. Stiff as bl**dy h*ll.
    The stock clutch took 410Nm and this pressure plate probably has twice as stiff a clutch pedal, so as soon as I get the second fuel pump in I'm going to see if it will take full power (with aprox. 510Nm) or if I will need to get a sinter plate put in.

  6. #6
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    Re: UPDATE

    A local volvo specialist found a sasch racing pressure plate for the m20 engine. Sasch rates it for 455Nm with a organic clutch plate.

    I had it put in with a new (stock) clutch plate, bearings and lightend flywheel.

    It holds up fine to full power (aprox 510Nm).

    Problem solved :)

  7. #7
    ///ARINUTS...
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    More info please

    Is that a volvo part or a BMW part??? got a number for it??

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