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quick question on flywheels

Discussion in 'A4/S4 forum(B5 Chassis)' started by jcb, Oct 7, 2011.

  1. jcb
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    jcb Active Member VCDS Map User

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    [Oct 7, 2011]
    if the 1.8tqs has a 210mm clutch and the S3 has a 240mm clutch and the S4 has a 240mm clutch.....

    why cant 1.8t owners looking to use an S4 clutch use an S3 flywheel and an S4 clutch?

    is the BAM engine (S3/TT) crank bolt pattern the same as other 1.8t's?
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  3. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    [Oct 7, 2011]
    The 1.8t A4 uses a 228mm clutch iirc, and the flywheels on tranverse are differant I think either crank bolt pattern or starter ring aragorn will now more on this subject lol

    Also A4's and S3's use dual mass flywheels and S4's have a solid flywheel so the friction plate has a sprung hub where as a dual mass doesn't.
    Last edited: Oct 7, 2011
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  4. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Oct 7, 2011]
    The transverse boxes use a different input shaft spline to the longitudinal ones, and the geometry of the starter ring is different as is the overall "height" of the flywheel/clutch pack. The starter attaches the other way round on a transverse engine, with the motor body alongside the transmission rather than the engine.

    They're also dual mass, and jsut as expensive new as a ECS or TTV conversion item, and i'm not sure i'd be wanting to fit a used dm flywheel to my engine.

    The crank itself is the same.
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  5. jcb
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    jcb Active Member VCDS Map User

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    [Oct 7, 2011]
    so my TTV flywheel 240mm won't fit an S3 then!
    damn, thought I had a buyer
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