Thank you!
I was thinking about this since few days ago, when I saw a video on Youtube. The pilot pulled back the prop to 2500RPM after takeoff but the MAP didn't rise. Usually the MAP would rise a little bit but in this case it was just the wastegate doing its job.
Another thing I noticed is that after passing 29/30'' of MAP, the FF rises abruptly. Is it because of the turbo boost?