If you read post #1 he said 1800 RPM was his Idle speed, That is high enough to pull fuel from the boosters and if the vacuum is low it will pull extra fuel from the PV if the PV is under that vacuum.
No, I'm referring to posts 8 and 23. You do not set power valve opening based on idle vacuum. That is just dead wrong and it needs to stop being promulgated. You set PV opening based on cruise vacuum. I run a 10.5 PV and I have about 9 inches of vacuum at idle. The power valve is not open, and it not passing fuel. It can't, unless the diaphragm is ruptured and then it won't matter what the vacuum rating is.
