Originally Posted by tacxplosion
You can use the smav-3 if you make it a FASOR using a T1 kit, or you can try using a 4-way valve for the usual setup, but you will need to find a way to control the valve dwell to the ram.
With the FASOR you can usually get away with setting it up so that inertia takes care of opening the valve and then the return spring/valve spring/pressure from the valve chamber allows it to close. You will still need all the leverage you can get to make the trigger have as short a throw to activate the valve as possible.
I was thinking about a FASOR design like the eigen ram. But like you said the pressure would tend to be higher to overcome the spring needed to return the ram. Which brings me back to a pulse valve but the quickest pulse valve I can find would only cycle at 5bps max.