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Okies, theres been a bit of misinformation bandied around on here my myself and others regarding the k03 turbos and what they're fitted to, and i've just come across a really good thread over on the 'zine so i thaught i'd summarise the data here.
I'm going to list each turbo model, what its fitted to, and its compressor/turbine specs along with maximum power (although these figures are probably in silly nonsense US wheel power, or perhaps borg-warners recommended power output, its still useful for comparison)
K03-005 - Standard fit on ALL cable throttle B5 1.8T's INCLUDING the 180hp AJL engine.
K03-029 - Standard fit on Drive-by-wire B5's and most B6 1.8T's bar the "190" model. Similar in specifications to the normal K03 fitted to Golf/A3's
K03-073 - Standard fit on B6 190 model. Similar in specifications to the K03s fitted to Golf/A3's
K04-015 - Not standard fit, Borg Warner turbo designed to be a direct replacement upgrade for the longitudinal 1.8T.
K04-020 - Standard fit on the TT/S3
FrankenTurbo F4h-l - hybrid, see 'zine thread.
K03-005
Compressor Size: 36/50mm
Turbine Size: 36/45mm
Approx Power Rating: 150HP
K03-029
Compressor Size: 36/50mm
Turbine Size: 40/45mm
Approx Power Rating: 160HP
K03-073
Compressor Size: 38/51mm
Turbine Size: 40/45mm
Approx Power Rating: 190HP
K04-015
Compressor Size: 38/51mm
Turbine Size: 42/46mm
Approx Power Rating: 210HP
K04-020
Compressor Size: 42/56mm
Turbine Size: 42/50mm
Approx Power Rating: 260HP
Franken F4h-l
Compressor Size: 40/51mm
Turbine Size: 42/50mm
Approx Power Rating: 240hp
So there we have it. Shows us the reasonably readily available k03-073 turbo is a nice upgrade without going to the expense of a new k04-015 too.
References:
http://www.audizine.com/forum/showthread.php?t=339475
I'm going to list each turbo model, what its fitted to, and its compressor/turbine specs along with maximum power (although these figures are probably in silly nonsense US wheel power, or perhaps borg-warners recommended power output, its still useful for comparison)
K03-005 - Standard fit on ALL cable throttle B5 1.8T's INCLUDING the 180hp AJL engine.
K03-029 - Standard fit on Drive-by-wire B5's and most B6 1.8T's bar the "190" model. Similar in specifications to the normal K03 fitted to Golf/A3's
K03-073 - Standard fit on B6 190 model. Similar in specifications to the K03s fitted to Golf/A3's
K04-015 - Not standard fit, Borg Warner turbo designed to be a direct replacement upgrade for the longitudinal 1.8T.
K04-020 - Standard fit on the TT/S3
FrankenTurbo F4h-l - hybrid, see 'zine thread.
K03-005
Compressor Size: 36/50mm
Turbine Size: 36/45mm
Approx Power Rating: 150HP
K03-029
Compressor Size: 36/50mm
Turbine Size: 40/45mm
Approx Power Rating: 160HP
K03-073
Compressor Size: 38/51mm
Turbine Size: 40/45mm
Approx Power Rating: 190HP
K04-015
Compressor Size: 38/51mm
Turbine Size: 42/46mm
Approx Power Rating: 210HP
K04-020
Compressor Size: 42/56mm
Turbine Size: 42/50mm
Approx Power Rating: 260HP
Franken F4h-l
Compressor Size: 40/51mm
Turbine Size: 42/50mm
Approx Power Rating: 240hp
So there we have it. Shows us the reasonably readily available k03-073 turbo is a nice upgrade without going to the expense of a new k04-015 too.
References:
http://www.audizine.com/forum/showthread.php?t=339475