really cant see it running that amount of boost- the SS version may run higher boost possibly around the 1.7 mark but your looking at reliability issues taking it to that level.
I think that's a typo. I've just checked the online manuals and it states that the peak boost is around 0.9-1.0 bar in normal mode. It doesn't mention 'Sport' mode, but I'd assume it'll increase to about 1.5 bar.
Bear in mind 'Sport' mode doesn't hold that pressure to the red-line, it's only in the mid-range (like an overboost to aid overtaking). Anyone who's displayed the boost gauge on their Bravo 1.4 Tjet 150 will notice that the boost peaks much higher, but drops off sooner and back to normal levels when 'Sport' is activated.