I think the PFC has a way to control boost too, my car see's 14PSI if I let it now, which I've only done once, and won't again until it's tuned. I bet there's a way to up the boost on your car with the controller.
The boost setting was set at the half way point (which was 10PSI before the intercooler), I set it lower and it didn't do anything, which makes me believe it might just be boost spiking (cutback + high flow cat + intake + intercooler does that).
It would be nice if there's a way to upgrade the secondaries without upgrading the entire rail and fuel system, due to the side feed injectors.