Plus with all 1.8T engines the ecu will vary the boost depending on time of year, atmospheric conditions and altitude. They dont have boost maps like the Tdi ecus. A remapped 1.8T boost can vary by upto 2psi-G.
The 1.8T engines are based on load demand and the ecu works out the requested boost (or with AGU air flow) by taking into account all the given atmospheric factor. AGU will use load demand in (ms) which can be logged on blocks 25 and ARZ AUM AUQ will use load % which can be logged in blocks 114.