If you have a ATC engine you have a ko3 (rated 195hp) and AWP have a ko3s (rated 215hp) . The diff......

FROM BORG WARNER

"thank you for your interest in our products.

First of all, we don't produce any turbo that we call K03S. But I hope I can
answer your questions with the following explanations.
All the following turbos have the same installation dimensions and
thermodynamical performance. The differences are only in the actuator that
opens the turbine bypass valve:
K03-011 (5303 988 0011) 150 hp, 65 N actuator
K03-026 180 hp, 85 N actuator
K03-035 180 hp, 85 N actuator
K03-044 150 hp, 65 N actuator
K03-045 156 hp (Ibiza Cupra), 85 N actuator with 2 ports
K03-049 150 hp (Sharan/Alhambra), 65 N actuator
The 180 hp versions have an actuator with a higher opening force due to the
higher exhaust gas pressure (which is a consequence of the higher boost
pressure). Otherwise the valve would be pushed open by the exhaust gas
pressure.
The following turbos are a further development (since 2000) and have an
improved and slightly larger compressor while using the same turbine (still
with the same installation dimensions):
K03-052 180 hp, 85 N actuator
K03-053 150 hp, 85 N actuator
K03-058 150 hp/180 hp, 85 N actuator
Consequentially, putting a 180 hp turbo on a 150 hp engine will not bring
about any change in performance, but putting on a K03-052/053/058 instead of
the older versions will bring a slight improvement in engine efficiency.
Additionally, with re-mapping the ECU you can achieve about 215 hp without
danger of overspeeding the turbo. With the older turbos, 195 hp is the
limit.
With the K04 that's also commonly used (5304 950 0001) the power output
should not be more than 220 hp. That means, changing a K03-052/053/058
against a K04 does not make a lot of sense.

I hope that these details answer your questions. If you need more info, one
of our service distributors will be glad to help you. Their addresses are on
our website http://www.turbodriven.com.
Mit freundlichen Grüßen/Best regards,
BorgWarner Turbo Systems GMBH"

 

A Guide To Garrett’s "GT" Model Numbers
GTxxyyzz:
[ul][*]Positions "xx" refers to the frame size of the turbine wheel inducer.
[ul][*]For example the "GT28" in "GT2860RS" refers to its turbine wheel frame size family. All GT28 units use a turbine wheel with 53.85mm inducer diameter[*]As a rule of thumb, the larger the number, the larger the turbine wheel. [/ul][*]Positions "yy" designate the compressor wheel exducer (major) diameter in millimeters
[ul][*]The "60" in the GT2860RS example above has a 60mm compressor wheel exducer diameter.[*]Note: Wheel sizes 100mm and over omit the "1" (hundreds digit)[*]Example: the 02 in a GT4202 refers to its 102mm compressor wheel exducer diameter [/ul][*]Positions "zz" may be used to designate special features of a particular turbocharger where applicable
[ul][*]Example: GT2860RS[*]"R" = this is a Ball Bearing unit[*]"S" = used for units which require some differentiation from units in the same family
Compare a GT2860R to a GT2860RS. While both are ball bearing and externally similar, the GT2860RS is better suited for higher-flow applications than the GT2860R. In this case, the S reflects the higher-flowing nature of the GT2860RS [/ul][/ul]

So to answer you ? further. The gt28 and gt30 familys have differnt turbine wheel sizes. The means it will flow more air and have increase lag and overall power capabilities. The last to numbers (71 or 76) are the size of the compressor wheel in mm, so the larger it is the more air it can move. This only plays a minor role in lag/spool. The rest is self explainitory from above. More info go to turbobygarrett.com

 

sooo... which k03 is in our beloved ATC? and the AWP?

 

Dont know for sure. My ko3 is bad and i have a ko3s coming later this week. Ill give you the numbers off them later this week or next if you really want them.

 

those HP ratings are the BHP or WHP?

 

They are european so BHP

 

thats what I thought.. does it also mean that you can get say 215 from your turbo alone (+ ecu remap obviously)or turbo plus all other mods?

 

im thinking from turbo alone, because people are more than making 200whp out ofallversions of theko3.

 

either or. i was just wondering what kind of k03 is in our cars since we have the ATC engines... audi sport emblem on the steering wheel signifies that correct?

 

Most likely all emblems are ATC. But we all have a olderko3. You can always check the tab on your head by the TB to tell you for sure whatengine you have.