Depending on which ecu, tolerance for aggressive control is generally 130-200 kPa depending on which gain component. Some have it as 300 kPa. So in a manner of speaking, any value within .2 or .3 bar is "kind of" considered "good enough" by the ECU. IOW corrections are less aggressive in this area, close to the setpoint. Outside that tolerance band, the gain corrections are considerably more aggressive.
that is why you do not want to run specified boost too close to the limit of the measuring range of the map sensor. If you do, the ECU won't correct for overboost spikes aggessively enough. (and EVERY properly adjusted turbo will spike a little on transients, at times, by design. If it does not, the response is overdamped or "too slow" which may look ok on a low-resolution vcds log but it drives like crap) That's why I INSIST on a 3bar with any upgrade turbo. Unless they don't mind stock turbo performance.
that is why you do not want to run specified boost too close to the limit of the measuring range of the map sensor. If you do, the ECU won't correct for overboost spikes aggessively enough. (and EVERY properly adjusted turbo will spike a little on transients, at times, by design. If it does not, the response is overdamped or "too slow" which may look ok on a low-resolution vcds log but it drives like crap) That's why I INSIST on a 3bar with any upgrade turbo. Unless they don't mind stock turbo performance.