Originally Posted by
rcmn0022
By adding more duty cycle in, you are telling the ecu to start with more boost and will allow it to get to its final value more quickly. I ran into the same problem and someone else was kind enough to help me out with the same suggestion. I have found that the faster the boost builds, the more likely you are to reach the commanded boost values.
If you want to read up on how PID controllers work then you can start playing with the PID controls for boost control.
Essentially they break down as follows P is present error, I is past error, and D is future error. I can't remember off hand which of those I have played with to get faster boost.