[Adger Smith]

Bill,
That is about the same conclusion I had when dealing with % of air pressure, but the actual air pressure coming out of the pinch is not the same as the 80 psi in the cylinder.
Also: How do you account for time and vol. as variables?
Or do you/should you?
Is this something that causes a quicker dump to be more consistant than a slow one?
I'm thinking it would be more consistant to pressure feed on both sides of the cylinder with regulated pressure differences.