I just checked the vacuum on my new engine because it is running really rich at idle and was trying to figure out the cause. It is loading up and causing the plugs to soot up. The most vacuum I saw was about 15 with reving, but at idle it was fluttering between 2 and 3. Does this seem really low? What do you guys with monster cam get on your vacuum gauges? If I am only getting that little of vacuum them I would assume that the cause of my richness is that the power valve is opening. The smallest power valve is 2.5, would this actually work? or would is still open? I guess the first thing I need to figure out is if my vacuum reading is at all normal.