Haven't been here in a while, but for those still here: after the re-install of the whole turbo set-up, it made 475 hp at 1,6-ish bar boost on gasoline, 0% Ethanol, gas (the higher octane of course) bought at the pump here in Netherlands.
At Santa Pod I finally reached my long time goal and it ran a 10,58 seconds in the 1/4 mile at 130mph! Way more then I anticipated.
I drove there, camped at the track and drove back home again on my own wheels - as I had always planned.
https://www.youtube.com/watch?v=9LI-_7aQIIw