Reply With QuoteI guess the fact that everyone labels it as the 's' is good enough for me. At least people know what you are talking about when you talk about the K03S.
Volkswagenist
And here I was thinking a letter from the manufacturer stating that there is no KO3S would be a definitive answer... How I was wrong...Originally Posted by ATPG
"If can't get behind your troops, feel free to stand in front of them..."
Sponsor
I guess the fact that everyone labels it as the 's' is good enough for me. At least people know what you are talking about when you talk about the K03S.
Ultimate Dubber
Yeah, I wanted a k04, but can't afford one, so i tell people it's the 'S', it's practically a K04....
Volkswagen Fan
Ive had this discussion on this forum before, the PGTi(mine) does have a K03s, im not sure if its only in South Africa our Polo turbos kept breaking possibly due to the altitude in JHB. My tuners confirmed I have a K03s hence my massive gains on a phase 1 map.
Heres a link confirming turbos on VAG cars.
The K03s has a larger diameter inlet and outlet.
thread
http://www.vwwatercooled.org.au/foru...tml#post360568
Volkswagenist
Now, I'm stumped about what I should believe...
Dear Sir,
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 TurboDriven.com - BorgWarner Turbo Systems.
Mit freundlichen Grüßen/Best regards,
BorgWarner Turbo Systems GmbH
Sales IDS - Technical Support
Christian Seibert
A letter from the ACTUAL manufacturer of the of the turbos stating that there was NEVER a KO3S, or a random list...
Heres a link confirming turbos on VAG cars.
Volkswagen Fan
I had pics of the K03 next to a K03s, they do exist.
Quick Google
http://audittmk1.blogspot.com/2008/0...s-k04-etc.html
Last edited by JK8; 18-05-2012 at 10:01 PM.
Volkswagenist
I once again refer back to the letter from the manufacturer... I would tend to take his word rather than an enthusiasts website.
Ultimate Dubber
I've not seen any info that would make me think an early 9N3 had a different turbo to the newer ones.
Not to say the parts are identical, there may have been different batches, minor revisions, etc.
Given the parts are BW and there does not seem to be any dovecote from them using the 'S', fair to say its likely just the newer model terminology.
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