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whats the difference?

Discussion in 'A4/S4 forum(B5 Chassis)' started by johnyj, Feb 3, 2008.

  1. johnyj
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    johnyj Member

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    [Feb 3, 2008]
    have just noticed (yeah i know) that the s3 is a 18t what is the difference between that and the 18t a4
    is it turbo ecu or something else?
    #1
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  3. jcb
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    jcb Active Member VCDS Map User

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    [Feb 4, 2008]
    about 45 bhp in quattro form
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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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    [Feb 4, 2008]
    the turbo is the KKK04 as fitted to the TT225 and the ECU map is different to suit. The injectors will also likely be larger than the A4 engines.
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  5. Markey
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    Markey Active Member

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    [Feb 4, 2008]
    Not 100% correct above, depending on year etc.

    The TT and S3 use the K03s turbos and have very different maps with steel pistons and i think the crank as well.
    #4

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