Here is one VW GOLF VR6 engine car that has been turbocharged, stock OEM engine is knock limited, so next step will be to open up the turbine to lift the specific power back up and will put it on WM50 port set up....
Some may find the ECU details and some calibration tools of interest. It is important to have this so you know what is happening and how to progress.
https://www.youtube.com/watch?v=GIkaC4Ind7k
I have other things if time allows to put up on some other ECU and water injection integration examples from real world cars, unlike others these actually still run
I'm too busy, but will try my best