I just got an email from a dutch based company who explained a bit about a variable turbocharger so i was like what?!
Basicly the have and extra valve in the ex. housing that with lower rpms/boost is almost closed so there is more pressure on it and when further on the throttle it opens!
somehow it does sounds dodgy but i reckon it has a point as well!
here is the pic they sent it with!
what do u think ?