The good thing is that at the lowest boost setting(external spring wastgate)it has the
270+ wich is at the mark of the powerfull duratec,dont tring to compare NA with forced induction,but as u see from the graph is really pleasefull.at 400 mark is lethal..one day tried 1.5 bar(450+) and was scary!
I think turbo,and CR worked out really good,so even a gt28 serries can be more than enough,planning a gtx28 in the future just to stay in about where i am now+ little more.
AVCR does a great job as its gear based so set up is 1st and 2nd at lowest setting (0.45 bar) 3rd (0.75 bar) and (1.1 bar) at 4th and 5th otherwise is a no no.