[Buchon]

Well, this is how I see the problem (in Brits terminology)

The main problem is that the game´s FM haven´t Boost pressure changes modeled in yet.

So if you made your plane performance line over the blue line to obtain the Boost +6 1/4lbs performance (as is in pre-patch) then you will be over it always, even if cut the throttle and the needle is showing +2 1/4 psi.

The correct way is at the inverse, you should make the economic performance curve (+2 1/4 psi) and then add Boost pressure changes to the FM.

Then you have both performance lines, economic +2 1/4 psi and +6 1/4 psi.

If you watch carefully the B6 graph you´ll discover that it´s a economic performance curve (+2 1/4 psi), so my guess is that they are planing to add Boost pressure changes to the FM.