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The Definitive Brake Thread for 8L A3/S3 Owners(and other Golf4 Platform cars).

Discussion in 'A3/S3 Forum (8L Chassis)' started by jojo, May 18, 2010.

  1. S3 Rav

    S3 Rav Well-Known Member

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    Does anyone know what make the oem s3 discs are?
     
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  3. Cobra88

    Cobra88 Active Member
    VCDS Map User

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    ATE mate :)
     
  4. S3 Rav

    S3 Rav Well-Known Member

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    Thanks cobra
     
  5. S3 Rav

    S3 Rav Well-Known Member

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    Does anyone know where would be the best place to purchase them? I've had a look on europarts but can't seem to find them.
     
  6. everard90

    everard90 Member

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    is it possible to use standard s3 discs with r32 callipers and what lines are best to use and do they just bolt on
     
  7. Sam_

    Sam_ Down under

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    Nope not even close. You need R32 discs with R32 calipers. The diameter and offset of the disc are way different.
     
  8. everard90

    everard90 Member

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    Shat about the hoses have they got to be r32 and do the calipers just bolt on

     
  9. everard90

    everard90 Member

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    do r32 callipers bolt on and the hoses connect up with no modifications
     
  10. Sam_

    Sam_ Down under

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    They bolt on but I can't confirm about the hoses. Probably worth getting some braided R32 hoses anyway. You'll be fine then.
     
  11. everard90

    everard90 Member

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  12. g60leigh

    g60leigh Well-Known Member

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  13. Mattwurbo

    Mattwurbo Member

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    Hi guys
    ive been offered a set of Mintex rear discs and pads that have come off a leon cupra r for peanuts. Are these a direct replacement for the rears on my s3 8l as the ones on at the minute are shot to bits. Thanks in advance
     
  14. GlennP83

    GlennP83 Member

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    I have just fitted 996 fronts to my S3 and have a few questions.
    The mc has been changed and the system bled numerous times,primed abs etc but still the pedal feels a little spongy.
    Is there something that I still need to do? Might it be something to do with the new mc?
    Any help would be greatly appreciated
     
  15. S3^DUB

    S3^DUB New Member

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    Hi Just got back from the garage with a quote for 1085 euros for new rear calipers and pads plus hoses. The calipers where 251 each.

    I have the chance to buy some 996 rear with discs pads and hose for 300 euros.

    Will these fit on my 2002 S3?

    New to this forum and my audi so need some advice! :)
     
  16. tonio94

    tonio94 New Member

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    Hi,

    I have an Audi S3 8L (225) with 256mm rear brakes and I'm looking for a new bigger brake disc than can be fitted on my car but it's impossible to find it...

    To begin I would like a disc between 280mm and 310mm and keep my caliper with track pads, just with custom carriers.

    And probably after I will change my calipers too.

    Can you help me ?

    Thanks and sorry for my english (I'm french).
     
  17. jojo

    jojo Looking for Boost!
    Staff Member Moderator quattro Audi S3

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    ECS stage1 308mm rears. Tarox do a similar kit based in the UK I think? And there's a member doing a 300mm rear conversion using S4 discs, forgot his username.
     
  18. tonio94

    tonio94 New Member

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    Thanks for your answer. In the ECS tuning website, there are no more parts for Audi 8L :(

    And on Tarox website it's always written "all 8L except S3" :( But the brake discs are too small.

    Definitely it's not easy to find. I could buy brake discs from last Audi S3 or TT-RS and drill holes to fit on my car, but I don't know if it's viable in the time, especially in a track configuration.
     
  19. Jenno007

    Jenno007 Well-Known Member

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    I currently have standard brakes with ds2500 pads and superblue fluid. I am looking at upgrading my discs mainly for the visual benefits (any added performance would be great).

    I have found the following

    Front:
    http://www.ebay.com.au/itm/Sport-br...arts_Vehicles_CarParts_SM&hash=item3a8760fa1e

    Rear:
    http://www.ebay.com.au/itm/AUDI-S3-...=AU_Car_Parts_Accessories&hash=item3ce607557b

    Does anyone see any problems with me going for such cheap disks? I note the rear don't mention the size, so if they are the correct size would it be wise to go ahead?

    I'm under the impression I can just bolt these in without the need for any other parts. Is this correct?

    Cheers
     
  20. Jenno007

    Jenno007 Well-Known Member

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    Just checked and both discs are the same size as standard. Is there any car that comes with slightly larger rear discs that would fit straight on without me having to change anything else?
     
  21. SHUk

    SHUk Member

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    Does anybody know if these will fit on an a3 mk1 8l???

    20.4692.00

    Thanks =]
     
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  23. laprell

    laprell Member

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    I'm pretty sure my 2001 A3 TQS has 288mm front and 239mm rear disks. I've just fitted new rear ones. Can anyone confirm this?
     
  24. SamHendry

    SamHendry Active Member

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    This is a great thread! Plain vented discs ftw
     
  25. Prawn

    Prawn My other car is a MINI!!!!

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    232x9mm solid rear discs. 288's up front yes.

    What a strange comment :laugh:
     
  26. laprell

    laprell Member

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    239mm x 9mm solid rear for sure, I got the 232mm based on this thread.

    Had to send them back To mtec. Who laughed at me on the phone.

    I didn't want anyone else to fall for it, but wasn't 100% that is not my car having some weird setup. To my knowledge it's all standard.
     
  27. Prawn

    Prawn My other car is a MINI!!!!

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    I'm afraid it's your car mate.

    Standard rears are absolutely 232x9mm

    239 are found on the front end of low spec smaller cars and mk2 golfs!
     
  28. laprell

    laprell Member

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  29. andy68

    andy68 Member

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    Not read all six pages, going back to the first post, Octavia VRS rear brakes also came with a 41mm piston
     
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  30. westcoast a3

    westcoast a3 Active Member

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    My back brakes are 239mm on my 2001 tqs, just bought some this week :)
     
  31. rupe

    rupe A3 TQS In Devon

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    Mine are also 239 :icon thumright:
     
  32. laprell

    laprell Member

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    Awesome! I'm not completely mad then.
     
  33. Prawn

    Prawn My other car is a MINI!!!!

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    This is absolutely bonkers.

    232x9 solids on all the FWD stuff. This is confirmed and true.

    256's on S3's.

    Yet bizzarely 239's on TQs?

    I'm not disputing you guys at all, I've just had a little search and found a few ebay listings for 239 TQ rears.

    it just seems so stupidly odd that they'd do it.

    Using up old parts bin stock of 9N polo front disc probably :laugh:
     
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  34. SHUk

    SHUk Member

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    Excellent thread of advice!!!

    Does anyone know where to find adapters for porsche 944 brembo calipers... Or know where I can have some machined?

    Thanks
     
  35. superkarl

    superkarl MAN OF STEEL

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    RS3 brake install

    The 'kit':
    [​IMG]
    1x pair of RS3 calipers
    1x pair of mk4 R32 334mm discs (in my case ebc)
    1x pair of brake pads (ebc red stuff, Evo X shares same caliper/pads)
    1x set of epytec adapters
    1x set of custom HEL hoses from DAGhosesupplies
    And peanut the bulldog

    Firstly I will confirm that the pistons are 44/40mm

    The R32 discs measure 70mm depth:
    [​IMG]
    The inside and outside of the discs are chamfered so this is not very accurate, actual surface depth is prob more like 65/66mm

    Whilst the RS3 pads measure 60mm depth:
    [​IMG]

    This results in a very minimal unswept area:
    [​IMG]

    Now onto the adapters. They're great quality:
    [​IMG]

    Compared to the stock rs3 calipers designed for a 370mm disc:
    [​IMG]

    Unfortunately the bolts supplied are only half threaded so don't fit into the calipers, I had to reuse the stock carrier bolts:
    [​IMG]

    Adapters all fitted:
    [​IMG]

    Fit pads, grease the pins:
    [​IMG]

    Comparison shot with S3 brakes:
    [​IMG]
    Don't be fooled, whilst the diameter increase isn't all that much, 312 vs 334, the new discs are 32mm wide compared to 28, and this makes them incredibly heavy!

    Now onto the car

    Fit the lines (I fit them into the caliper and quickly swap the lines from oem to new)
    [​IMG]

    Fit the discs and they look like this: (******* awesome)
    [​IMG]

    Now, do they fit in the wheels?
    My wheels are 17x8 et35:
    [​IMG]
    [​IMG]

    DOH

    5mm Spacers required (now effectively an offset of et30):
    [​IMG]

    And longer bolts:
    [​IMG]

    The result:
    [​IMG][​IMG]

    Wahoo!
    The result with freshly powder coated wheels fitted with 235/45R17 federal 595rsr:
    [​IMG]

    Job done:
    [​IMG]

    Figured this might be useful for the brake thread, so feel free mods to rip this post from here.

    Special thanks goes out to my dad, Paul aka crazy88, Tilling wheel refurbs and DAGhosesupplies for a great service.

    Costs to my kit is as follows:
    calipers: £3-400
    Discs: £152
    Pads: £115
    Adapters: £136
    Lines:£40
     
    #233 superkarl, May 10, 2015
    Last edited by a moderator: May 11, 2015
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  36. Sam_

    Sam_ Down under

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    Here's some caliper piston size calculations. Thanks to @superkarl for measuring his TTRS calipers.

    Stock S3 ATE's
    54mm
    2290.22mm2

    18Z Cayenne/Touareg/Q7
    30/34/38mm
    706.86mm2
    907.92mm2
    1134.11mm2
    Total 2748.89mm2
    18.2044% larger than stock

    TTRS
    40/44mm
    1256.64mm2
    1520.53mm2
    Total 2777.17mm2
    1.0235% larger than 18Z
    19.219% larger than stock

    17Z Cayenne/Touareg/Q7

    34/36/38mm
    907.92
    1017.88
    1134.11
    Total 3059.91mm2
    9.6877% larger than TTRS
    10.7086% larger than 18Z
    28.7728% larger than stock





     
    #234 Sam_, May 10, 2015
    Last edited: May 10, 2015
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  37. Prawn

    Prawn My other car is a MINI!!!!

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    Good info Sam :icon thumright:

    To add to that, it's worth noting that brembo Jnr GT and LCR calipers have an area of 2272mm2, so are actually smaller hydraulically than stock, hence the fantastic pedal feel they give.
     
  38. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp?

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    Will let you guys know what the K-Sport 356mm 8 pots kit is like :weight lift2:
     
  39. Sam_

    Sam_ Down under

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    snowy likes this.
  40. snowy

    snowy Crunching Gears

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    Subjective indeed

    I love the dual stage braking of a decent 6pot design

    The finesse of the 1st feather stage is great for smooth driving

    Maybe some folks are so lead-footed though they don't know anything other than stamping, and assume the feather stage is travel ?
     
  41. Prawn

    Prawn My other car is a MINI!!!!

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    Unless I've missread between the lines here, I don't like what you're implying Snowy
     
  42. basil brush

    basil brush Active Member

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    Does anyone know if the 312 S3 front setup fits behind standard A3 1.8t speedlines ?
    I've searched and can't find the answer !
     

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