Originally Posted by gamble~it
also, what kind of efficiency will i be looking at? i only have a 13/3 and need at least 50 shots per tank to last me a few games
Well considering I get 1900+ shots off a 68/4500 on my MQ'2'd E-cocker tuned for 14-15bps (tuned for 290fps), I'd say efficiency will be the least of your concerns on a pump gun, lol.
I have never been able to match the efficiency of the MQ-valve with a spring/hammer setup, and those are already quite efficient when well-tuned. My Mq'd E-cocker is more efficient than my Trilogy pump, even though it's a semi, for example. The way to tune for maximum efficiency with an MQ valve is to run a lowish dwell, like 3ms, and then adjust your pressure accordingly. I run a dwell of 4ms, with around 220psi to achieve 290fps, and it is still extremely efficient...the higher dwell/lower pressure softens the recoil and is softer on paint, as well as quiets the sound signature.