...I’m used to seeing it as inches of vacuum.
I’m sure there is some formula to correlate the drop in pressure inside the manifold to a in/hg value.
Of course, then what is the Man V reading(displayed as in/hg)that’s showing numbers in the 28” range?
Although it says psig, it looks more like manifold pressure absolute on the scale on the left. And then the in/Hg looks to be manifold
pressure rather than in Hg of vacuum, so "upside down" if you will? If those numbers are accurate from the manifold doesn't that seem like a lot of vacuum?