Three components were changed correct?
IC, DP, and Built Motor - which the built motor is a much larger dynamic than the others.
@Hoon, are you on an after market ECU and tuning for a boost target? If not, then the IAT sensor may be adjusting the AFR in a way that requires more WG to match the flow?
Had you done the rebuild and DP with the Unitronic IC, then switched, this all could have been easier to depict.
But, your build is so advanced that your only approach (if you want what works for you) is to get a custom done right? Being full on race built I would think so.
That AMS is surely putting down solid cooling for you and you only have an approx -2psi drop in the system - which is quite normal actually running high boost.