Hello everyone
I own a 535D 272hp
I did a log with 3th gear from 1600rpm to max rpm I discovered that between 3300/3500rpm Ihave around 400 milibar loss of boost
at 3000rpm car makes 1.8, when reaching 3500+ rpm boost goes down to 1.4, then towards the limit is getting to 1.5/1.6
by now i changed:
-all vaccum hoses
-tested vaccum leak
-both pressure converters and electrovalve
tested for vaccum leak all 3 actuators ...