to simplify the first calculation i treated it as if i had a flat piston and valve and i came out to 22cc. but just to be on the safe side we'll just say 20cc or 1.22ci. now how do i figure out how to calculate that into valve pressure per stroke? ive searched the google and this forum but cant seem to find the right conversion chart or formula.

i'll sleep on it for tonight and could probably think of the right key words by then

DNADNNOID

i totally reverse engineered this little tidbit from an earlier thread of mine to figure it out:

quote from phil:

""Total of 8 pumps with a Benji is: roughly 28 cu.in. of swept air.

The factory valve volume is: .25 cu.in.

In a perfect world, at sea level, the above is a ratio of 112:1 or, 1,646psi

The Benji has a lot of losses going on, so the above figure is really too kind.

The piston seal is one big area of loss. ""

the formula is: air pressure x swept volume x number of pumps / valve volume = valve pressure

right?