The lambda sensor on the FC only does cruise and low boost tuning - running the ECU in closed loop - once you boot it hard, the lambda can\'t keep up anyway, so the ecu goes to fixed maps using the MAP sensor and MAF / temp sensors to sort out fuelling.
The BAC solenoid is used to control stable idle when loads are placed on the engine, like power steering, air con, lights, heating - so again once you are under any kind of boost, the BAC isn\'t really doing anything.
The worrying one is the MAP sensor - the code 13. If it\'s fixing pressure at a set value, and you are running higher boost - then the engine will run lean - which will explain your dyno figures.
The BAC error code may be the cause of your rough idle