http://www.mrturbo.com/
Call them, I can't remember the guys name, Mike I think, the owner, and tell him you were told to from here .org.
I was supposed to do some afr testing and get back to him with the difference between stock and his adjusted one. They do someting to get the pressure correct. I cant see any thing but I figure that they connect and check the pressure and clamp the case to get correct pressure as there is no visible modification over stock. I does cost about three times the stock one. But, if you do a search for it here, it comes highly recomended by those who know.
I know it makes mine work better than the stock one did. Before it went.