Originally Posted by jdpsearcher
But doesn't the wastegate open up completely once target boost is reached no matter what the duty cycle is, thus bleeding off excess boost....
No, the duty cyles define how open or closed the WG is at any given moment. The WG does what it's told by the controler, nothing more or less. I've never seen a log where the WG was totally open at peak boost - if it went 100% open, boost would drop like a rock.