k04's are beginning to be thought of as not worth it... but i wouldnt know, ive never had personal experience with either turbos..

 

well I am currently running 14 psi, want to run 16 but I think i have a boost leak. I want to hold it past 5500 rpm. by the time I am at 6800 I am at 5-7 psi depending on the gear I am in. I have done the diode mod too. I still have not figured out the boost topping out at 14 psi cincytt, thanks again for all of your help with that.

 

ko4 is a very good way to keep almost stock like reliability. its a very good turbo and when done properly is very quick.

 

i have the k04. . . ITS worth it. Altho i wouldnt mind upgrading to a bigger **** but i have a tiptronic so i cant WAHHHHHH i run a MBC and spike around 22 psi and settle around 19. its fun... k04 = worth every penny. just make sure you get chipped and all that stuff too

 

Discontained, what chip are you running on your car? Do you have a tip chip as well?

Josh

 

maybe on an older a4, but the new ones it is pointless for maybe 10-15hp. Dont make me post the borg warner letter again.

 

I have a 2001 cincy TT is it worth it? I just want to hold my boost at higher rpms and I did your diode mod. any suggestions if you feel it is not worth it.

 

"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"


you have one of the turbos listed in red and what Borg Warner has to say about switching in bold

 

Once again cincyTT thank you for your help

 

No problem