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Crank - flywheel info needed

Discussion in 'A4/S4 forum(B5 Chassis)' started by jcb, Feb 14, 2007.

  1. jcb
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    jcb Active Member VCDS Map User

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    [Feb 14, 2007]
    Does anyone know (i.e. actually seen) the bolt pattern for RS4/S4 crank to flywheel compared to that of a 1.8t crank to flywheel?

    Is there any reason I couldn't use an RS4 clutch and (if needed) Flywheel on a 1.8t? both B5 chassis, both inline,

    I can;t think of one off hand but thought I would seek some advice.
    I want an uprated clutch with as close to OEM feel as posisble.
    RS4 is rated up to 400+lb/ft which is more than enough for me and will keep the dual mass OEM unit.

    any help would be great
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  3. macca
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    macca Member

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    [Feb 14, 2007]
    i'm only guessing they are different as i thought ecs tuning say they modify the flywheel to take a s4 or rs4 clutch, is the s4/rs4 flywheel bigger diameter?

    i think rs4 clutch is the way to go though.

    looks like you and i have the same things planned for our cars at the moment.
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  4. jcb
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    jcb Active Member VCDS Map User

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    [Feb 14, 2007]
    that why I think an RS4 flywheel is the way forward, can't believe they would have a different bolt pattern between flywheels.
    can understand why an rs4/s4 clutch would fit on a 1.8t flywheel though.
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  5. Caesium
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    Caesium My BM is fixed!

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    [Feb 14, 2007]
    I would think as the RS4 has a bigger engine the flywheel is likely to also be bigger and with more mass, if you fit a flywheel with larger mass onto a smaller engine, it wont run right, and will probably be more sliggish to accelerate.
    Just go for an uprated clutch to fit your existing flywheel, maybe a part ceramic one with an uprated pressure plate.
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  6. PhilR
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    PhilR One Ate Tea

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    [Feb 14, 2007]
    How much power are you aiming for ? my mate has a mk2 golf with an AGU 1.8t with IHI turbo running about 350 and he uses a standard clutch.

    Suppose it has less weight to propell though
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  7. jcb
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    jcb Active Member VCDS Map User

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    [Feb 14, 2007]
    he is not 4wd either, only point of slip on 4wd is at the clutch.
    I haven't found a decent aftermarket clutch that isn't a stupid price or that requires a larger left leg transplant.

    Doc put me in touch with Southbend and they are around $600

    any thoughts on other options?
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