jackssmirkingrevenge wrote:What are you using as a pilot valve? Also, how much space is there behind the piston?
Effectively the piston only needs to move 25% of the barrel diameter for full flow, though you should allow a bit more to account for piston bounce. This means that for a 3/4" barrel, 5-10mm of movement is enough.
As a pilot valve I'm using a 1/2 ball valve. I was hoping to make the piston so sensitive that I could trigger it with a schrader valve to avoid having valve handles and therefore making a better air gun replica...
Behind the piston theres about 70mm to the ball valve.
My piston has like 20mm of movement.... so I gotta find a barrel with longer threads and then sand some threads off so it can go in deeper to acheve 10mm. When I do that, the piston will be more stable because more of its length will ride inside the connector making a better seal?
I made a longer piston and it worked. All I have to do is open the ball valve quick enough so the piston can move. If I open it slowly it will all leak out. Any suggestions how to fine tune it?