Mitch, was there a specific reason for that setting?
I recall Rogue tested powervalve settings last year and didn't find much success at that extreme of a setting. Here's what he wrote...

So in short, if your a drag racer running only WO, then blocking it off closed won't impact top end RPM / Power.If you do anything else, it can greatly impact your power below 6k RPM.... you can even screw up and set it to 1.75CC or more and it will kill your top end.