VTG: 1Z to VTG Conversion

I want to convert my 1995 Passat (model year 1996) to a VTG turbocharger. Is there a way to avoid replacing the engine control unit (ECU) during this conversion? The ECU is a ..021DD, and I'm not sure if it's an MSA12 or MSA15. Could I simply install chips with a VTG turbocharger map?

Could I not simply use chips with a VTG loader map?
I can't, because there is no dataset with VTG information available for the MSA12.

Best regards,
Rudi

Can I conclude that the '..021DD' is definitely an MSA12 stage?

Can you!

Great! And which AFN engine control units are compatible if I want to keep the wiring harness and WFS (waterfall system) unchanged?

Sure, here is the translation of the text from German to English:

'e.g.: 021 CE, CG, CK, DF, DT, EM, FQ'

Does anyone happen to have a control unit for sale at a reasonable price?

Hey Cruiser,

You know that you also need other pressure transducers to control the VTG (Variable Turbine Geometry), that you need to add a vacuum reservoir, and that the VTG turbo has a different exhaust port. Also, you'll need a different manifold!
The exhaust pipe, if you use the original one, is a component that includes the catalytic converter.

The items listed above are approximately 1500 EUR, brand new and original VW parts (without the turbo, as noted).

What are you doing with VTG?

The AFN not only has a VTG (variable turbine geometry), but also other control units (which you would have with the STG - engine control unit), and even different fuel injectors (to mention another component costing just under 1000 EUR).

"Put together a 10-cent tuning package for the 1Z engine. It will give you approximately 105 horsepower and 250 Nm of torque, and it costs "a little" less. Plus, it's more likely to pass the TÜV inspection."

I don't know if you'll be able to get a registration for a 1Z-AFN hybrid.

m;

Dieselcruiser wrote the following to me after I asked for some feedback:


Hello Martin,

Thank you for your contribution. I would have liked to respond to it, but unfortunately, I can no longer do so because I am now suddenly required to be a "blue-collar worker" in order to be able to write.
Your suggestions were all good, but I was already aware of them. I have a 1Z engine with a turbocharger and am satisfied with its performance, but I would really like a VTG (Variable Turbine Geometry) turbocharger setup, especially for more low-end torque. I already have the turbocharger and exhaust manifold for that. My 1Z downpipe is connected to the catalytic converter, so I'll probably have to fabricate a custom downpipe to fit the VTG turbocharger and keep my catalytic converter. The vacuum control should not be a problem, nor should the oil lines. However, I will likely need a new engine control unit (ECU) and possibly different injectors at some point.
Thank you very much for your contributions!

Best regards, Alex!

Thank you to dieselmartin. Now that I know that you only have to answer a few questions to become a 'Blaumann,' I've done so, and can now participate in the 'Blaumann' discussions again.
'Isn't there some kind of aftermarket exhaust manifold variant that has a pipe that connects directly to the catalytic converter (like the one on my 1Z engine)? If so, I could avoid having to buy a new catalytic converter or build my own.'

To the best of my knowledge, that doesn't exist.

The 1Z model sometimes came from the factory with a flexible pipe and catalytic converter as a single unit (mine did).

The AHU (which is 1Z with 3 letters) and the AFN always have the pipe and the catalytic converter as a single unit. Therefore, they also have a longer flexible pipe and an additional support behind the flexible pipe.

(I've mentioned this many times before, and it should be findable with an image search.)

m;

I've also read about all the issues with flexible exhaust pipes. But before I spend money on a new catalytic converter, I'd rather try to adapt an AFN exhaust outlet pipe to my 1Z flange using a universal flexible pipe. Maybe someone here has a defective AFN catalytic converter with the corresponding downpipe, or perhaps one with a damaged flexible pipe that they could spare.

@dieselmartin: In the VTG picture under your name, I can see 9 guide vanes, but my loader has 11. What model of loader is the picture from?

My avatar is borrowed from the original author with their permission.

http://www.technologie-entwicklung.de/Gasturbines/VNT15-Turbo/body_vnt15-turbo.html

Recently, there was a thread here about turbines with 9 and 11 guide vanes.

Please https://community.dieselschrauber.org/en/viewtopic.php?t=8390&highlight=gt17%2A+vnt%2A.

Then you don't have the original turbocharger from the AFN engine, do you?

m;

I bought the turbocharger described as being 'from a Golf 3 with 110 horsepower,' but it's actually a GT17...
What's stated in the post you mentioned is actually quite positive for me, especially regarding the idea of addressing issues earlier. Let's see how the 'trouser leg' problem can be solved.

Best regards,