Been consistently running at least 15lbs of boost (up to 21lbs) and have not experienced any issues. I have not dynoed with a fuel curve so I can't tell you what ratio it's running...I need to do that soon.
As far as FMIC goes...you should be less concerned about how it looks and more concerned about performance. While you may have seen front mount gains on other cars...the consensus is that MOST FMIC are not built correctly for the Z. FMIC are fine for a single turbo civic or talon or eclipse, just not the Z's twin turbo design.