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pipe7284
10-10-2006, 03:22 PM
i am not really sure if this has been covered before, but here it goes.

As many of you know i decided to demod my b5 a4 to stock, the only k03 that i could find was from a 2001 a4 b5, which is the 170hp. will i have to change anything else since my car comes with the 150 hp k03 and now i am installing a little bigger turbo? are injectors the same on 98 and 2000 models? how about ecu?
thanks.

sean1.8t
10-10-2006, 03:27 PM
there is no difference in the turbo between the ko3 and ko3 sport. the shaft size is a little thicker but thats it. the 170 hp comes from a higher factory boost level and an advanced timing. so any ko3 will work.

there needs to be a sticky explaining - KO3=KO3 sport

TQMB5
10-10-2006, 03:48 PM
yea more then likely they just bumped the boost so its only going to have 150 hp to you

SeanF
10-10-2006, 04:02 PM
there is more to it than that...

to get the extra 20hp, not only did they up the boost, but they added variable valve timing.

and on top of that, its a lower compression motor than the aeb, so they had to overcome that as well...

i remember seeing the turbine on a k03s and k03 side by side and they didnt look the same... maybe someone can dig up that picture..

SeanF
10-10-2006, 04:03 PM
but to answer your question, you wont need anything other than the turbo to get your car ready for sale...

sean1.8t
10-10-2006, 04:10 PM
did you mean these pix? and yes the compression difference is .2:1. due to the increase in PSI

ko3
http://www.audiworld.com/tech/pix/k03-turbine.jpg


ko4
http://www.audiworld.com/tech/pix/k04-turbine.jpg

TQMB5
10-10-2006, 04:28 PM
Thats pics of a K03 and K04 not a k03 and k03s

maxspeed
10-10-2006, 05:30 PM
ko3s = k03 with k04 turbine

sean1.8t
10-10-2006, 05:35 PM
Originally posted by TQMB5
Thats pics of a K03 and K04 not a k03 and k03s

hense why i labeled the pics as "ko3" and "ko4".. im trying to tell you guys that there is no difference in the ko3 and the ko3s.. only a thicker shaft.. ask mike hood. he'll tell you


Originally posted by mike-2ptzero
K03sport = the K03 found in the 2000+ A4 1.8t's which had the upgraded K03. The true K03sport was really only found in the GTI's around the same time. In 2001 they upgraded the K03 found in the A4 1.8t again and the K04 with a thicker shaft.

mike-2ptzero
10-10-2006, 06:01 PM
Originally posted by sean1.8t
hense why i labeled the pics as "ko3" and "ko4".. im trying to tell you guys that there is no difference in the ko3 and the ko3s.. only a thicker shaft.. ask mike hood. he'll tell you


2000 got a new wheel(more aggressive) and the 2001 got a thicker shaft with that wheel.


VVT was just for emmisions, doesn't really add any real power.



Injectors are different, ndbw has 240cc while dbw has 270cc injectors. The ports in the Intake Manifolds are also different and so are the injector seats.


You can use the dbw K03 on a ndbw, it will most likely flow a little more air and the ecu will just add more fuel since the maf readings will be slightly higher.

sean1.8t
10-10-2006, 06:57 PM
haha, allow for the man to correct everything.. one day i hope i know that much about these machines.. im slowly getting there i think.. but still all in all,

any ko3 will work

RAyala2.7T
10-10-2006, 07:46 PM
it will work. i have a k03s off an 04 a4 on my girl's 99 aeb passat. works just fine.