I'm getting a bit stumped here.... I used to suffer from terrible boost drop, like from 10psi to 5psi, so changed the actuator for a -31 type and hey presto got the same problem, however dropping from 15psi to 10psi. Was then told it was the Amal valve, plus I was getting the boost cut after 5 or 6 seconds of full throttle, so bypassed the Amal valve completely and fitted a three port bleed valve. It now holds a rock solid 12psi, however I'm STILL getting what feels like boost cut after sustained full throttle in the higher gears. How the hell can this be happening? The amal valve is still connected electronically but no boost pipes are connected to it, they all connect to the bleed valve. What's causing the power to shut off momentarily at full throttle? Have I been replacing all these components for no damn reason at all?