K04 custom?

[nihil]

Came across Blouch Turbo, and they list the "factory" K04 upgrade for the 1.8T longitudinal as 220HP, while offering a custom version with a claimed 270HP and a flow rate of 27lb/min on the compressor side. Does anyone know the flow rate for an unmodified K04-0015? Has anyone tried this custom K04?

http://www.blouchturbo.com/turbos/K04_18T_1/

VW/Audi K04 1.8T (Longitudinal) Factory Upgrade Audi A4 1.8T
VW Passat 1.8T
220 HP Yes Blouch Turbo offers factory Borg Warner upgrade turbochargers at prices that are hard to beat!



VW/Audi K04 1.8T (Longitudinal) Custom Upgrade Audi A4 1.8T
VW Passat 1.8T
270 HP Yes Does your 1.8T run out of legs above 4500 RPM - this custom compressor and turbine upgrade is for you. Can be purchased as new Borg Warner/KKK turbo with custom upgrade or Blouch Turbo can rebuild and upgrade your existing turbo (requires rebuildable core).

[Arclight]

Interesting find...maybe it's like an MTM or Sportec tuned K04.

[a4husslin]

Thats not too bad. You could almost get a gtrs for that price. I would want to see dynos though.

[demea]

supporting 270 HP maximum

I would think that the turbo itself (when installed on a 1.8) wont produce 270 HP, but if your engine/turbo combo produced it...it would be able to support it.
Thats how I read it.

But really, for that price I think it would be kinda foolish to not go GTRS.

[mike-2ptzero]

Interesting find...maybe it's like an MTM or Sportec tuned K04.

IIRC Jet Jockey said the MTM K04 actually had a larger hot side, which allowed more flow and the reason it makes more power. So if a shop only changes the cold side the compressor wheel might be able to flow more air but the hot side is still going to only allow so much exhaust, so in the end it might not even make any more power then a standard K04-15.

[Nerney]

Came across Blouch Turbo, and they list the "factory" K04 upgrade for the 1.8T longitudinal as 220HP, while offering a custom version with a claimed 270HP and a flow rate of 27lb/min on the compressor side. Does anyone know the flow rate for an unmodified K04-0015? Has anyone tried this custom K04?

http://www.blouchturbo.com/turbos/K04_18T_1/

I just send off my K04 to Blouch this week for a rebuild and I'm going to have them quote me prices for the larger compressor. They only problem I saw with it was the software side of things. From what I found you'd really need custom software to get the most out of the bigger compressor.

[Quattro_USP]

Anyody have any more info to add to this post? How would APR K04-15 software react to the beefier K04? Would you have to get custom tuning?

[SeKKeY]

hmmmm very interesting...

[AudiA4Turbo22]

it's called a Super K04 Neuspeed and Dahlback used to have those, very unreliable, the life is seriously reduced due to the added stress.

[QTC]

I'd think you would at least need the software tweaked, if not full custom tuning.

it's called a Super K04 Neuspeed and Dahlback used to have those, very unreliable, the life is seriously reduced due to the added stress.

And info to back that up? Just curious. I also thought Neuspeed's was just a K04-15 but I guess I'm mistaken. Do you know what it's hotside was?

[AudiA4Turbo22]

^^no info myself i know a guy who runs a neuspeed super K04 they called it the SK04 so ya, dahlback and neuspeed software should do the trick.

[Nerney]

my ko4 is at blouch right now for a rebuild.. when they call me with the estimate to rebuild I'll ask if they know anything about the software aspect of the bigger compressor in the ko4

[EBG 18T]

it's called a Super K04 Neuspeed and Dahlback used to have those, very unreliable, the life is seriously reduced due to the added stress.

Neuspeeds sk04 is nothing like the dalhback k04. the neuspeed was modified by euro spec (?) iirc and was compelte shit. the mtm & dahlback special k04's are actually made by borg warner per special specs for mtm & dalhback. iirc the sportec special k04 is a similar deal.

[dirtybrd]

The ECU will adapt to it.

[audikid66]

i got a k04 from gpopshop with a larger compressor wheel then a k04-15 and a ported and polished hotside... great turbo.. im going 71r by end of summer tho

[AudiA4Turbo22]

The ECU will adapt to it.

hahahaha

[dubgli]

can i bump this? I'm curious about the software tune for this turbo mod from blouch.

[dirtybrd]

Just run a K04 file on it.

[EBG 18T]

can i bump this? I'm curious about the software tune for this turbo mod from blouch.

there technically is no software for this Blouch custom turbo. I was talking to mike at Blouch about it and he is not suggesting anyone run the turbo unless they have someone to make the software for it.

Needless to say i am sending down a K04 core next week to have it rebuilt, ported and the clipped to the new 27# specs. It should be interesting and i will have the software redone for this new turbo next month.

[dirtybrd]

It's not going to flow so much more that a custom file is needed. Just log it and make sure everything is in spec. I ran a GT30 hybrid off Giac +1 and never had an issue.

[EBG 18T]

It's not going to flow so much more that a custom file is needed. Just log it and make sure everything is in spec. I ran a GT30 hybrid off Giac +1 and never had an issue.

seeing as i already run a custom tune i am not concerned, we will just log it and set it up for what ever this new turbo can flow. mind as well make the most of it. There are very few people out there with any experience with this turbo so i figured it is worth a try. he has a excellent reputation for rebuilds and quality. for people with K04's that need a rebuild this may prove a very viable option for folks.

as you mentioned you can run almost any turbo on a upgraded off the shelf file. but my goal is to optimize what i have to work with, thus the custom tune. I was going to go with a GTRS, but for me having the hp down low in the rpm range was more important that the big numbers the the GT's can produce.

[dirtybrd]

The other thing is the K04 shaft to not that big and adding a larger wheel to it makes it weaker.

[gt8]

i have a SK04 but I have no clue if it's neuspeed or anything else :( so far i have never been able to get it running right... go figure

[EBG 18T]

The other thing is the K04 shaft to not that big and adding a larger wheel to it makes it weaker.

I asked Mike at Blouch about that as it was a concern of mine. When they rebuild he actually uses a larger shaft and bearings than the regular K04 setup. So that will alleviate some of the issues that the old Sk04 had.

[mnkyA4]

I asked Mike at Blouch about that as it was a concern of mine. When they rebuild he actually uses a larger shaft and bearings than the regular K04 setup. So that will alleviate some of the issues that the old Sk04 had.

How much does he charge for a rebuild? I have a used SK04 and want to get it rebuilt eventually since I haven't installed it yet.

[docurley]

I still think my SP51 Outlaw sounds better

The upgrade I have in mind has our largest wheel options for the K04-015 and includes the SP51X compressor.
The "X" wheel will be tied to a K04-023 turbine shaft, this shaft is found specifically on Audi Motorsport cars.
This upgrade requires re-profiling of the turbine housing to accept the larger K04-023 turbine shaft.

The K04-023 has approximately 3mm larger inducer compared to the K04-015 sharing the same exducer.
In addition this upgrade includes the over-sized SP51X compressor wheel, updated Bearing Housing with "twin-feed"
oil canals and every CHRA that leaves this workshop is tested to the extreme.

We can accomplish this task for $650+ship, I would consider a lower price but the donor doesnt help us because of the damage.

[nihil]

I'm very tempted to pull the trigger on this. I can certainly see the appeal of big numbers and large shiny turbos, but on a daily driver I want lots of low end grunt and factory('ish) reliability/appearance. My car currently has APR 1+ 93 and 91 programs (Bosch 386cc/TT225 injectors), so upgrading to the APR K04 file will be the cheapest programming I'll get for a larger turbo.

But... I'm worried about running lean with the extra 5lb/min flow. I've already had the mysterious `02 APR 1+ lean code that it seems nobody can figure out the cause of (just twice so far in fairly cool air), and it seems like running a 22lb/min program with a 27lb/min compressor is just begging for trouble.

How far out of it's designated range can the ECU adapt? I should be able to counter lean conditions with slightly larger injectors on the 386cc duty cycle, but the next step up is 440cc which could take it to the other extreme, running too rich all the time. Is increasing fuel rail pressure on the 386cc injectors difficult, or a bad idea?

[dirtybrd]

The ECU can make up the extra fuel, it can add up to 25% more. You'll need to log the injectors and make sure they not running over ~80-85% duty cycle. The APR lean code is a programming glitch IMHO.