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rated power of standard clutch and gearbox

Discussion in 'A4/S4 forum(B5 Chassis)' started by jamie226bhp, Oct 23, 2009.

  1. jamie226bhp
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    jamie226bhp Member

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    What power can the standard quatro gearbox and clutch handle on a 2000 plate 1.8t
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  2. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    The standard clutch will be marginal at anything over chipped A4 spec.

    As for the transmission, they can take many powers. Dont think there will be an exact upper limit, how much are you looking to put thru it?
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  3. jamie226bhp
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    jamie226bhp Member

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    thinking of a t28 convresion so hoping for 260bhp
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  4. adamss24
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    adamss24 Active Member

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    No problems with that...Fit a decent clutch and you should be ok. You can break a gearbox even with 50 Bhp if you do miss the gears a few times !
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  5. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator

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    There is a big power drag car on the Zine that was running 500BHP plus through a std 1.8t box.
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  6. jamie226bhp
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    jamie226bhp Member

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    any recomendations on clutches while still keeping the duel mass fly
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  7. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator

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    JCB can get southbend clutches that use the DMFW for cheaper that Website prices IIRC
    Soupie69 is running a stage 4, i had a stage 3 and was happy
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  8. jamie226bhp
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    jamie226bhp Member

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    How much did you pay, would i get away with a stage 3 and do i need to uprate the fuel pump
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  9. CraigG
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    CraigG Member

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    Instead of wasting money on some uprated aftermarket clutch for the DMF, stick a 240mm solid flywheel on there and run an OE S4 clutch.

    Probably cost less, and will get rid of the probably knackered DMF too.
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  10. jamie226bhp
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    jamie226bhp Member

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    but i thought the duel mass is there to take all the shock load and save extra wear on the gearbox
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  11. Siena
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    Siena Active Member

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    On the contrary, the DMF is the weakest part of the transmission, next to the stock 228mm clutch.
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  12. jamie226bhp
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    jamie226bhp Member

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    so removing the DMF will have no adverse effects on anything
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  13. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator

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    Depends how light you go !

    You can have chattereing at idle with a SMFW and also when dropping to idle from driving the idle can drop slightly below the idel setting causing the engine to cut out if the aircon on or hunt while the ECU trys to maintain the tick over. The engine should spin up quicker which is good
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  14. jamie226bhp
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    jamie226bhp Member

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    not really bothered about going ultra light just want to keep the driveability with a setup that will handle the 260bhp odd i'm hoping for and if a solid fly and clutch is a cheaper better option i'll opt for that
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  15. jcb
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    jcb Active Member

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    you might be cheaper but only if you are very lucky.
    S4 clutches are anywhere from £220-300 depedning who you go to

    personally I think a 240mm flywheel and s4 clutch is overkill for a car putting out little more than a stock S4 and nowhere near the low rev torque delivery of the V6, where the clutch is really needed. (although Siena's 1.8t 240mm SMFWs are the dogs danglies!).
    removing the DMF can produce some extra noise from the transmission when in neutral and idle...but as you are probably going to uprate your exhaust and stereo you won't notice!

    At the moment I run a stage 3 Southbend on a dual mass (180tqs few mods- less than 200bhp though). clutch pressure at pedal is stock. It is good for over 300ft/lbs of torque and new they are around $400 (£250). I could slip the audi clutch on spirited hill starts...not any more.
    "stage 4" is the next step up at 400+ftlbs for around $540.

    These are not some aftermarket specials made in China on the cheap, SB buy in Sachs clutch housings and friction plate chassis and build them up to their own spec with uprated pressure plates and friction materials.
    They also do a stock diameter steel ($369) aluminium ($429) single mass flywheel and OEM dual mass flywheels ($590).
    even with taxes they work out cheaper than most kits here.

    I am biased but I bought three myself before I became a distributor.
    happy to have a chat if you want to know more.

    BTW who was it on here who was looking for a 1.8t quattro gearbox?
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  16. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    My local factors have S4 clutches for around £150. Might not be Genuine Audi, but its still going to be a branded clutch from a respectable manufacturer like Luk or Valeo, and more than capable of handling the power required.

    You'll also probably find that if the DMF has done any sort of mileage it will be knackered, or at the very least getting on a bit, so going solid and 240mm does it all in one hit.
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  17. jamie226bhp
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    jamie226bhp Member

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    car's only done 60,000 miles but the dmf would be changed regardless just whether it goes to a solid or new DMF and my mate works at GSF so i get good prices on bits
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