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  1. #1
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    engine differences between S3 and 1.8TQ

    I thought the 180bhp 1.8TQ engine was a detuned version of the 210bhp S3 engine and the 225bhp S3 engine was the same as the TT

    could someone clarify for me please

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    Ess_Three's Avatar
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    Re: engine differences between S3 and 1.8TQ

    No, 210 S3 is basically the same as a s3 / TT 225...both chip up to the same although there are slight differences between the two.

    The 180 engine is more like a Golf / A3 150 but with a slightly better turbo.

    The 180 is NOT as strong (bottom end) as a 210 / 225...nowhere close, and hence you can't take the same liberties with it when tuning.

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    Re: engine differences between S3 and 1.8TQ

    As I understand it the 1.8TQ has the same basic engine as the 1.8T with a KKK K03 turbocharger and single intercooler. Its ecu is mapped to give 180 bhp rather than 150.
    The unit that they fit to the S3 & TT is didderent with a KKK K04 turbocharger, twin intercoolers, and stronger pistons and con rods (i'm sure there are some other small differences as well).

    I dont believe that there is any difference between the 210 S3 and the 225 except the ecu programming?

    can anyone add to this?

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    Re: engine differences between S3 and 1.8TQ

    thanks for the info

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    Re: engine differences between S3 and 1.8TQ

    if the 1.8TQ isn't as strong is 215bhp within its limits or is it really starting to strain the engine?

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    PaulRS3's Avatar
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    Re: engine differences between S3 and 1.8TQ

    also things like twin cats etc on the S3.

    intake manifold round the other way on the non 210.225 engines due to only having one IC

    after run pump is also fitted on the 210/225 lump to circulate coolant round the turbo jacket to help take heat away when engine is shut down

    There are subtle diffenced im told with the way VVT works between the 210 and facelift 225 engines.

    mine is solenoid driven electrically, im told the earlier 210's were oil pressure driven...

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    Re: engine differences between S3 and 1.8TQ

    mahle pistons ,stronger rods,k04 turbo

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    Drill's Avatar
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    Re: engine differences between S3 and 1.8TQ

    Paul, just FYI, some of the 150/180 hp versions of the 1.8T had twin-cats as well, but since the S3 and 1.8TQ have different sized exhausts (S3 being larger) the part numbers are different, as the cats are larger [img]/ubbthreads/images/graemlins/grin.gif[/img]

    [img]/ubbthreads/images/graemlins/beerchug.gif[/img]

  10. #9
    PaulRS3's Avatar
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    Re: engine differences between S3 and 1.8TQ

    [img]/ubbthreads/images/graemlins/beerchug.gif[/img] careful mate thats on topic [img]/ubbthreads/images/graemlins/lol.gif[/img]

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    Re: engine differences between S3 and 1.8TQ

    Think that Aurom is right. Although the general architecture of A3 and S3 engine is the same, some differences in camshaft, turbo size, intercooler and specially in ECU to provide 215/225 HP in S3. As 150/180 HP are basically the same with different programm to get 0,8 bar of turbo blow pressure (instead of 0,5 in 150), in S3 they must be applied the same procedure; new reprogramming and calibration of valves to increase blow pressure.
    Essentially the same engine. Thats what you do when remapping....

  12. #11
    Drill's Avatar
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    Re: engine differences between S3 and 1.8TQ

    [ QUOTE ]
    PaulS3 said:
    [img]/ubbthreads/images/graemlins/beerchug.gif[/img] careful mate thats on topic [img]/ubbthreads/images/graemlins/lol.gif[/img]

    [/ QUOTE ]

    [img]/ubbthreads/images/graemlins/shocked2.gif[/img] Good point, I won't tell anyone if you won't [img]/ubbthreads/images/graemlins/angel.gif[/img] [img]/ubbthreads/images/graemlins/smile_smoking.gif[/img]

    [img]/ubbthreads/images/graemlins/lol.gif[/img] [img]/ubbthreads/images/graemlins/beerchug.gif[/img]

  13. #12
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    Re: engine differences between S3 and 1.8TQ

    just been looking at the turbo upgrades on Jabba's website and they reckon my engine is good for 350bhp 300lb ft with no internal mods to the engine and with mods 550bhp can be achieved. Conrods need upgrading beyond 335lb ft so I think I have been worrying over nothing

  14. #13
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    Re: engine differences between S3 and 1.8TQ

    [ QUOTE ]
    James M said:
    just been looking at the turbo upgrades on Jabba's website and they reckon my engine is good for 350bhp 300lb ft with no internal mods to the engine and with mods 550bhp can be achieved. Conrods need upgrading beyond 335lb ft so I think I have been worrying over nothing

    [/ QUOTE ]

    I think correctly translated thats putting a fighter jet engine into the car [img]/ubbthreads/images/graemlins/jawdrop.gif[/img]

  15. #14
    ANDYTQ's Avatar
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    Re: engine differences between S3 and 1.8TQ

    180's have KO3 SPORT turbos ,which is a larger unit,or at least mine has one.As Drills says twin cats,although i looked at the shape of the front pipe/cats the other day and it looks very restrictive 1 into 2 and then back into 1 ?.Am having a 3" downpipe made up with a 200 cell cat,should improve flow.Cheers Andy.

  16. #15
    Drill's Avatar
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    Re: engine differences between S3 and 1.8TQ

    AH, but the 180 versions, when tuned, get the same results as the 150 versions [img]/ubbthreads/images/graemlins/smile_smoking.gif[/img]

    Here's some engine code info I found on www.briskoda.net:
    [ QUOTE ]
    AUM (Octavia 1.8T FWD):
    150 hp
    FWD
    VVT, EU4
    DBW
    smaller injectors
    hybrid K03/04 turbo

    AUQ (Octavia RS, Leon Topsport)
    180 hp
    FWD
    VVT, EU4
    DBW
    bigger injectors
    hybrid K03/04 turbo

    ARX (Octavia 4x4)
    150 hp
    Haldex
    VVT, EU3
    DBW
    bigger injectors
    hybrid K03/04 turbo

    ARY (Leon 4)
    180 hp
    Haldex
    non-VVT, EU3
    DBW?
    bigger injectors
    hybrid K03/04 turbo


    [/ QUOTE ]

    And as the range of VAG engines is pretty much the same (Excluding the TT/S3 ones) then it appears that while the 180 DOES sport a K03S, it does NOT have VVT whereas the 150 (ARX) version has both [img]/ubbthreads/images/graemlins/grin.gif[/img]

    [img]/ubbthreads/images/graemlins/grin.gif[/img] [img]/ubbthreads/images/graemlins/beerchug.gif[/img]

    And for some more info on the 4 different versions of the 1.8T in the A3 you can look HERE [img]/ubbthreads/images/graemlins/grin.gif[/img]

 

 

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