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Review - Shuenk TSI K03+ Turbo - Dyno

WalkerT

Ready to race!
My review
Product: Shuenk K03+ for Transversal Mk5 & Mk6
Price: $849 with Dv+ and boost pipe
Part number: K03+

Reason:
My project GTI has been Full Bolt On (FBO) stg 2 for four years and has gone through all the different tuners and multiple different bolt on parts. Once your mk6 is stg2 everything else is only small improvements. So over the last year my turbo developed that annoying wastegate rattle on decell. Car was running its best times but the noise was driving me insane. So I started to look at all the aftermarket turbo options. I also outlined how much I wanted to invest on this next step. I did not want to go BT because the GTI is paid off and I didn’t want to drop 3-5k in a car only worth 10k and possibly make it less reliable. So my next option is the K04 and I looked at a couple companies but all their kits were 2-3k for something I could probably put together myself. Then looked at just replacing the IHI turbo with another IHI those are all over a 1k with no gain in overall performance. So during my search I had emailed Shuenk and asked about their turbos and they mentioned that they had a K03+ hybrid turbo ready for testing that I could beta for a reduced cost. This was a win for this project as wanting to keep cost within reason.

Benefits:
I am a fan of the K03 as I used and modified the K03 back when I had a stg2+ FSI Audi A4 and I knew the K03 had better flow than what I was getting out of the IHI turbo. This better flow helps because our stg2 tunes already request more boost than our stock IHI can ever make, even on their best day (see datalog pictures). This K03+ turbo is designed to be a bolt on replacement for your IHI without needing to pay for a different tune or a bunch of supporting mods. As you can see from the data log this turbo can flow way more than the stg2 needs so it reaches and surpasses the stg2 request and holds that boost power to red line. There are a ton of us that never go beyond stg2 because that requires new tunes, and other supporting mods in order to get there.

Includes:

K03+ turbocharger
Silicone adapter
Optional:
Boost pipe
DV+
K03+ shuenk.JPG



Compairison:
You can see in the side by side pictures the K03+ has a bigger compressor and has a better flowing exhaust manifold with larger turbine.
(Click on the thumbnails)

K03+ IHI side by side.JPGK03+ IHI side by side 2.JPG
IHI turbine.JPGTrubin k03+.JPG

Install:

The install is a moderate/high level install. Simple tools, and like most, I have done all my installs but this was one of the biggest. As most know the turbo is in a crap location and can have some difficult bolt locations. Just like all installs make sure you spray everything down with penetrant lube prior to removal. There is a great write up by Gamble on golfmk6 that will give you all the basic step by steps for the install as the K04 and K03+ are the same body turbo. For this install I spread out over a weekend and 7 hrs a day give or take some breaks. Taking my time of course. As this was a beta turbo the compressor did need to be clocked because I did not like where the compressor outlet sat in relation to the block. This required loosening the five bolts on the compressor side and slowly moving the housing the give me better clearance. There is a limit to adjust-ability because you do not want to move it so much that the wastegate arm changes its preload. With that done it was just a bolt everything back together. First start up and zero leaks! I felt super accomplished because I was nervous going into the install.

Dyno:
As with all my reviews I need proof. These guys that say their BS intake gave them a ton of power are why I dyno my car before and after every mod. A dyno is a great tool to see if your car has gained or lost power. If you just strap your car down and do one run and nothing else then you really are not using a dyno for its purpose.

Dyno.JPG


AWD mustang dyno with correction factor on a cold day so it does read low but this review is to show gains not max numbers.

BASELINE – My GTI has IE intake, boost pipes, IC, DP, Exhaust, IE stg2 tune
Feb 12, 2020 10am 41 degrees – graph best of the three runs

AFTER – Same IE intake, boost pipes, IC, DP, Exhaust, IE stg2 tune now with the K03+
Feb 26, 2020 10am 46 degrees – graph best of the three runs

Dyno Video

K03+ vs IHI dyno.JPG


Gain of 36 WHP and 26 WTQ!!

Datalog:
Also I datalog all my dyno runs so I can review each run to make sure there were no weird issues during the runs. The datalogs shown here were those actual runs. This K03+ has a lot of potential because on the stg2 tune the wastegate is only at 59% of load! So there will be more to come on finding the limits of this turbo.

IHI boost request.jpgK03+ boost request.jpg

Daily Driving:
As you can see from the dyno’s this added a solid amount of HP and TQ across the entire power band. The car feels great with smooth power and it pulls. Honestly it feels like when I use to NOS a car. Because the power band does not change it just adds an even amount of power across the full rev band!

Conclusion:
With an aging MK6 community we are all going to need to change our turbo eventually. The stock IHI turbo has its limits and add miles and normal wear and you are not even close to what your current stg2 MK6 can actually produce. This gave me a solid gain across the entire rev band without dropping a ton of money. So it is a big win for me with my full bolt on maxed out stg2. And there is potential to get more out of this turbo. We as a group spend more than this on most exhaust / DP systems. Also got rid of the FN wastegate rattle.

Website:
Where to buy them
https://shuenk.com/
Contact sales@shuenk.com
 
Last edited:

GolNat

Drag Racing Champion
Very interesting!! It's great knowing that people are still invested in continuing the MK6 platform and doing things differently.

Great write up and thanks for sharing (y)
 

WalkerT

Ready to race!
That is why I agreed to the beta test. We can all benefit from new products being designed for our platforms!
 

WalkerT

Ready to race!
It is still in beta you have to email them if you are interested in buying one. They are working on getting a web page set up for it.
 

doug@frankenturbo

Turbos Galore
Travis -- thank you for volunteering to test our novel turbocharger design on your Mk6. For some time now we've been wanting to find out if a turbo that's designed specifically for "staged" chip tuning would offer a benefit. And boy, your dyno sure demonstrates it does.

The key to the K03+ turbo's success is owing to the way tuners calibrate their software for the stock turbo. As you said in your review, performance software mapping typically requests more from the stock turbo than it can deliver. Our K03+ is meant to pick up that horsepower being left on the table. And with its up-sized turbine housing and larger OEM-style mixed flow rotor, it delivers that power at safe back-pressures and EGTs. In other words, if VW asked IHI to give them a turbo for use with performance software, we think this is what IHI would offer.

The next step is to find out how well the turbo cooperates with other software. We will have news on Cobb and Unitronic from our own test car shortly. And we are offering a significant rebate to outside testers.

Thank you Travis for the excellent data collection and careful control of your testing conditions.

Doug Harper
FrankenTurbo/Shuenk
 

doug@frankenturbo

Turbos Galore
...I should also congratulate you on being the owner of the highest-power Stage2 Mk6 around. No way any stock turbo can match your current boost and airflows output!

dh
 

GolNat

Drag Racing Champion
Interested how your Unitronic test goes.

So this turbo is meant to be run off a Stage 2 map? If I am already stage 2 I can just put the turbo on and be ready to go?
 

doug@frankenturbo

Turbos Galore
Interested how your Unitronic test goes.

So this turbo is meant to be run off a Stage 2 map? If I am already stage 2 I can just put the turbo on and be ready to go?
If it doesn't work like that, there's no point in the turbo. It MUST be 100% compatible with off the shelf software -- and make more power than a stock turbo.
 

WalkerT

Ready to race!
Interested how your Unitronic test goes.

So this turbo is meant to be run off a Stage 2 map? If I am already stage 2 I can just put the turbo on and be ready to go?
Yes that is the idea. As I did just bolt on and dynoed.
 

doug@frankenturbo

Turbos Galore
Here's a graphical illustration of what I meant by "Power being left on the table". These two charts show how the stock turbo is not meeting requests for either boost or load. In this case the car was running an Integrated Engineering Stage2 flash. And clearly the flash is ready for more turbo. That's the niche our K03+ is meant for.


 

tofuD01

Ready to race!
If it doesn't work like that, there's no point in the turbo. It MUST be 100% compatible with off the shelf software -- and make more power than a stock turbo.
I am on stage 2 APR tune and have this wastegate decel rattle and it is doing my nut in too, this stage 2+ upgrade would be a nice upgrade if it is cheaper than k04 options (i have also paid off finance on car and had a whole new engine put in 2 years ago) so want this car to last me a good 5+ more years yet!
 

WalkerT

Ready to race!
I am on stage 2 APR tune and have this wastegate decel rattle and it is doing my nut in too, this stage 2+ upgrade would be a nice upgrade if it is cheaper than k04 options (i have also paid off finance on car and had a whole new engine put in 2 years ago) so want this car to last me a good 5+ more years yet!
I had even tried changing down pipes to see if the rattle would be less with a hfc and no it did not change the sound. This turbo has a lot of potential and runs really strong on the stg2.
 

1776dmc

New member
Travis -- thank you for volunteering to test our novel turbocharger design on your Mk6. For some time now we've been wanting to find out if a turbo that's designed specifically for "staged" chip tuning would offer a benefit. And boy, your dyno sure demonstrates it does.

The key to the K03+ turbo's success is owing to the way tuners calibrate their software for the stock turbo. As you said in your review, performance software mapping typically requests more from the stock turbo than it can deliver. Our K03+ is meant to pick up that horsepower being left on the table. And with its up-sized turbine housing and larger OEM-style mixed flow rotor, it delivers that power at safe back-pressures and EGTs. In other words, if VW asked IHI to give them a turbo for use with performance software, we think this is what IHI would offer.

The next step is to find out how well the turbo cooperates with other software. We will have news on Cobb and Unitronic from our own test car shortly. And we are offering a significant rebate to outside testers.

Thank you Travis for the excellent data collection and careful control of your testing conditions.

Doug Harper
FrankenTurbo/Shuenk
Can you update us on how the unitronic stage 2 tune is with yall's new turbo?
 

BudgetPhoenix

Drag Race Newbie
Are they going to be selling the turbo without the DV and boostpipe included? I'm sure the included DV is a chinese one and dont really need the boostpipe.
 
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