RE: What is static pressure and why is it important?
All explanations given here are great.
I’d simply add that when you go to the doctor they always take your blood pressure, so now you’re the doctor and you need to know the numbers to make your diagnosis.
Without measuring static you will miss a key piece of data. And what really gets me are the guys that connect the gauges on the system right away and too often start adding gas without knowing anything at all about the air flow… arrrggg !