Went for some data logging today. Found out what was the reason of high boost - I accidently turned autotuning on (2 instead of 1 in the user adjustable menu).
Switched autotining off, changed start boost and overboost limit to default settings and did some data logs.
9-10 aggressive beta map (FBO upgraded turbos MT), default settings (start boost 50%, overboost limit 17 PSI):
Fourth run (decided to lower start boost to 40%):
Fitth run (set start boost back to 50%):
The first question is simple: WTF
??? FBO, RB turbos, 98 octane fuel, moderate boost (my car used to autotune to ~same boost with stock turbos) and these f*cking timing drops...
Could it be because of the fuel? I always fill my tank in the best brand gas station in my country (Statoil).
The second question: if autotune doesn't work and is switched off, how come boost almost all the time is higher than 16 PSI, sometimes even 17+PSI?