I repair most of the problems, but I still have one which makes me mad.
When I go in 3nd gear (for example) and push throttle, car going ok, but when boost reach 0.5 bar (standard max boost) engine start making noise.
and I have feeling that car going better on low boost.

Is possible that air going out on exhaust mainfold, on higher boost ?

see picture? What you thing, is possible thata air going out??