I have been sick of posting this and the same info over and over again and people dont seem to get it. So ill just post the info strait from Borg Warner

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"

 

Oh, im sorry, i have been saying its a 15hp differnce, buts its only rated 5hp more

<= boy is my face red!!

 

lol i really need to dyno my car when i get the new clutch. im pretty sure im pushing more than 220hp. my friend has a sick *** GLI. he took out a lot of weight and has pretty much all the mods you can do while keeping the stock turbo and i pull him pretty good and my car is overweight. he's actually dropping a porsche engine in it soon, hopefully by then i will have my BT in

 

You can make more power past that, but your just blowing hot air more than anything else. ALso the power is just a peak and then tapers right back off. So you have max power for maybe 200rpms tops running it like that.


And your boy throwing in a porsche engine in his gli is funny, its gonning to cost way more money then sense and he could of had a nice gli for the price spent.

 

Good stuff.

 

ya hes obsessed with turning his gli into a porsche for some reason. but he's loaded and his dad runs the Champion Audi/Porsche in Pompano. he's already got porsche rims and brakes on it, next is the engine

 

i would love to have money like that

 

Thanks for the info Cincy.

And damn chaos.. friends crazy. but FWD[&:][&:]

 

I don't think it was pointless.

I think it was a cheap way to make more power. It cost me 700ish to do the change, and it's not all about horsepower. You didn't mention torque... I'm seeing way more torque with the k04.

Regardless of how my dyno-emulation software works, I've kept it constant since I did it stock and with the k03 chip, so take a look at my graph and tell me it's pointless.

https://www.audiforums.com/m_637539/tm.htm

So you've chipped your k03. What's the next step then other than K04 (since it's pointless)? I'm not spending thousands on a BT setup and tuning. I'll stick with the 600 dollar gpopshop k04, FPR, and 20 dollar new giac k04 chip.

You don't like it, fine. I do. It was worth it for the money and the experience of doing it myself. PC-16 and it'll make even more power and torque. I know i'm a 'noob' compared to cincy, but I like it. If given the chance, I'd do it again.

 

^ you have a '98 so its a bigger jump. They have a difference in 25hp rating and that should be a decent amount of torque.

But even then, you could see far better gains with a $400 water/meth kit and along with its other benifits. Plus when your turbo falls on its face (both k03/4's do past 5k) you will have a huge increase in timing to keep the power high while the boost falls. So now you can have a higher peak and far more power throughout the rpm range where the ko4 basically just gives you a peak increase.