Is there any interest in turbochargers larger than K04's?

[Verruckt]

I've had a few people express interest in my K16/K04 turbochargers. These are a good option for someone looking for even more power over standard K04's plus increased reliability due to slower shaft speeds. These turbos show minimal lag compared to standard K04's (http://www.nogaroblue.com/VAG/K16spool.jpg) but offer more efficiency over the RPM range.

Shaft speed differences are shown below to produce 1.2 bar.

RS4K04: 157K rpms
RS6K04: 144K rpms
K04/16: 124K rpms

(numbers are taken of the compressor maps for RS4 K04, RS6 K04 and K16 respectively)

These turbos do not require any special programming (work well on K03 or K04 software) and fit the same as a K04 would as they use re-worked K04 housings.

For a lesser price, one can obtain hybrid turbos based on the K03 housing which means that the OEM intake pipes can be used.

This is NOT a for sale post as I have nothing to sell. However, if there is interest expressed...I would obtain advertising status and take things from there.

Feel free to ask any questions you may have.

Below is a comparison of the compressor wheel sizes (RS6 is slightly larger than standard K04 wheel).

[Prawn]

Yep I would be interested.
Also interested in the K24.K04 that Jacob is looking at as well.

[Golfather]

Definate interest in the K04/K16 hybrid as its tried and tested on your car !

[Verruckt]

Prawn, I am anxiously awaiting how well the K24's work as well. Funkweasel (Troy) may be getting them. Jacob is a friend of mine and I might see if I can sell his turbos on this side of the pond if we can get some intrest brewing. He does excellent work.

Pictures of my turbos can be found here.

Definate interest in the K04/K16 hybrid as its tried and tested on your car !

Yes, and there are 15-20 additional fitments in the US doing quite well. One customer recently dyno'd at 412 HP and 420 ft-lbs (570 NM) at the wheels on K03 software!

[S2tuner]

Chris, I have a customer who might be interested too.

What K24 are we talking about here? 2470 compressor wheel as used on the Audi S2? Is the "K16" wheel the 2467 wheel for which compressor maps are availabke?

Regarding power figures, I wouldn't trust dyno figures coming from the US, because the dynos you guys use out there are simply not right. I have many examples of personal experience on dynos in the US that I can share in case ppl are interested in funny things about dynos.

Shoot me an email, I'll arrange for a dyno session for your car if you're interested! Then we have "european" crank figures to quote to people.

Cheers,

Mihnea

Prawn, I am anxiously awaiting how well the K24's work as well. Funkweasel (Troy) may be getting them. Jacob is a friend of mine and I might see if I can sell his turbos on this side of the pond if we can get some intrest brewing. He does excellent work.

Pictures of my turbos can be found here.

Definate interest in the K04/K16 hybrid as its tried and tested on your car !

Yes, and there are 15-20 additional fitments in the US doing quite well. One customer recently dyno'd at 412 HP and 420 ft-lbs (570 NM) at the wheels on K03 software!

[Imolavirus]

They are the K16 and K24 wheels used in the Porsche 996tt and 993tt turbo variants

[S2tuner]

thanks imolavirus hey, is this an AW invasion here??? :p I know ya


Mihnea

[okkim]

What are the differences between K03 and K04? Can I made the hybrid from the K03's and fit the K04 housing and the K16 compressor wheel? Are the turbine wheels same in K03's and K04's? Or maybe I just would change the needed K04 stuff to K03's if thats possible?

[Verruckt]

What are the differences between K03 and K04? Can I made the hybrid from the K03's and fit the K04 housing and the K16 compressor wheel? Are the turbine wheels same in K03's and K04's? Or maybe I just would change the needed K04 stuff to K03's if thats possible?

There are a number of options. The K03 and K04 turbine wheels are not the same.

You can use a K03 housing and install K16 compressor/K04 turbine. This works well, but won't quite flow as much as the same wheels in a K04 housing. You can also install K04 wheels on the hot and cold sides in a K03 housing. Below are the differences between a straight K03 and straight K04 turbo.

[okkim]

Thanks for the info! It seems that I have to find K04's, it's enough for me and easier. Anyone knows (cheap) RS4 turbos? Used or new.

[Verruckt]

Thanks for the info! It seems that I have to find K04's, it's enough for me and easier. Anyone knows (cheap) RS4 turbos? Used or new.

Have you blown up your K03's?

You could also consider having your K03 turbos rebuilt with a K16 compressor wheel and clipped K04 turbine. These appear to flow at least as good as K04's and are a very economical option.

[okkim]

No those are ok, but I want more power! I have to ask from turbo company in finland what they think of using those K03's for upgrade.

[Verruckt]

No those are ok, but I want more power! I have to ask from turbo company in finland what they think of using those K03's for upgrade.

I agree. If you want maximum power, using the K04 housings is the only way to go.

[Dippy]

I have assumed that the S4 uses 'standard' K03s from the supplier (Borg-Warner?) and the RS4 uses 'standard' K04s. Am I right or is there such thing as an RS4 turbo?

[Verruckt]

I have assumed that the S4 uses 'standard' K03s from the supplier (Borg-Warner?) and the RS4 uses 'standard' K04s. Am I right or is there such thing as an RS4 turbo?

You are right...kind of.

The S4 uses a K03. However, there are different K03 variants available form KKK. The A4 1.8T also uses a K03, but it's not the same.

The RS4 uses a K04. However, the RS6 also uses a K04 (with larger compressor wheel) and the 225 hp TT also uses a K04.

The RS4 K04 is a specific model of the K04 group. There is nothing inherently special about the turbo other than the geometry of the inlets/outlets for proper fitment.