...........................................

 

Mine was like this too. Give it time and it'll be back to normal.
If it doesn't then your f-hose is probably bad.

 

you probably have a leak some where.

 

give it time? just sitting around waiting won't fix something like this unfortunately.

you most likely have a leak. did you swap the DV's yourself? you might have either pinched a line somewhere or a vacuum line wasn't secured right. i'd open it up and take another look.

 

Then I said if it doesn't go back to normal then his f-hose is probably bad.
I changed my dv's and for the first few runs my car wouldn't boost past .6 bar. So I figured he might have the same issue. If not then he obviously has a boost leak.

 

The only thing that would make the boost start low and eventually rise is if something in the diverter valve is binding and not moving smoothly. Over time that might sort itself out but something is certainly wrong! Diverter valves bypass boost when you close the throttle and prevent surge from hitting the turbos. If they leak boost due to either a weak spring or binding mechanism then there's an issue. Apparently stock valves have issues with internals going bad and with weak springs - hence the change. If boost is low you've still got air escaping either from a boost leak, bound up valve, weak spring, or signal not getting to it. You need to find this as when air bypasses when it shoudln't the turbos won't know and will spin ever harder trying to reach the proper boost. In an extreme case where the turbos cannot flow enough to overcome the air leakage you could damage them. If you aren't ever seeing proper boost levels you are likely overspeeding your turbos IMO.