A bit o.t.t there man, I'm just saying on the boost part of the question that my sti has acted like that since i have it, and my wrx was the same i.e when you nail the throttle the gauge hits about 1.3 bar and then comes back to 1-1.1 bar I asked the question to people who owned sti's and had a gauge fitted what readings they were getting and they were all the same. I personally dont think it is a problem or will cause my engine to go bang! surely after four years of owning an impreza behaving like this it would have happened by now. I also had the car on the rollers and specifically asked about boost and they told me it was fine. I agree with you about people posting as supposed expets who dont know their ar*e from their elbow talkling about det. and engines going wallop, from my expeience and people i know who own subarus, engine trouble only comes with modification. I'm not passing my self off as an expert here only giving my experience.
By the way is the supposed problem hitting 1.3 bar or not holding 1.3 bar.