At 1900, it achieves the maximum torque, while the maximum boost pressure is significantly lower. You can clearly see this when you have a high load and low RPMs, because otherwise it would normally spin out of the range too quickly.
I didn't really pay close attention, but yesterday when accelerating from 60 mph in 5th gear (with 4 people, luggage, and going uphill) after passing an Autobahn construction site, I had 1 bar of boost at 1500 rpm.
Log is currently not possible, I need to find time to modify the power supply so that it grounds the notebook power supply.
So, bei 1500 U/min sollte der 'target LD' (oder 'target Luftdruck') nicht einmal 1 bar betragen...der 'target LD' von 1 bar sollte bei ca. 1900 U/min liegen...und das funktioniert.