so in a nutshell
big hole + big air + big speed = big distance

Looking at the costs of a good sized dust collector valve i think i'm going to have to look more into the custom built piston valve.

I'm guessing that the same is applied to the piston valve, the larger the valve opening the lower the psi i need..?

my 1 1/2 inch dust collector out performs my 2 inch sprinkler valve... Not even close to the same performance... So Matt, with the dust collector valves... you say they open faster than the sprinkler valve, Is that the main difference? Do you know if the diaphragms in those open up further as well,...

here correct me again if i'm wrong.

I'm seeing that a piston valve or a dust collector valve would give me a much better performance than the sprinkler valve.

jackssmirkingrevenge wrote:If ultimate power from a pneumatic is what you seek, look into burst disk valves.

I'm guessing with those burst disk valves that you can't really control when it goes off?
I do like having the simplicity of a a trigger.

Kilash wrote:I got a 12 metre long basement, nosy neighbors and a police station across the street

That just makes it all that more fun !

There are several big valves you could make. A piston valve is probably the easiest. Look it up. title=Category:Valves maybe i should clarify my question/confusion. In my mind there are factors that would define the muzzle velocity of a spud. PSI along with the restriction of compressed air leaving...

I built my first potato gun two years back using a 3/4in sprinkler valve. It sure is fun as hell and impresses friends and family members entertaining our summer picnics for hours. I live in SE MN and have a 12 acre wooded lot and have a large air compressor with plenty of hose to pull to the back y...