finally. What a pain. Lots of de-burring but the fix was using the right O-rings - cast urethane, size 013 to seal the valve with the tube (for the cut-out area). I also cut the o-ring grooves a little deeper... only a few thou
<img alt="[linked image]" src="http://i1249.photobucket.com/albums/hh5 ... ewa1dz.jpg">
Pumped it up - took 17 pumps to fill the valve. Before skeletonizing it was only 9. It's been holding air for two days now so I'm getting ready to tune and test. Thanks -
Wyo
The extra volume did help, no doubt, but I'm now facing another reality... I think - small pump volume. There's probably only so much you can do with 1.1 cubic inch at 80% atmosphere. But still, it has better performance (efficiency) than anything else I've got... and with a 12" barrel.
With 4 recharge pumps it made 5.7 fpe, with 3 it was 4.7. The prior version (smaller valve) did 5.2 fpe with 4 recharge pumps. I am surprised and impressed with the ES and accuracy. It makes a nice 10m pistol.
Some other notes...I cranked-in the RVA as far as it would go and got 578 fps or 11.8 fpe from a full charge. It didn't empty the valve but I'm <strong>not </strong>going to re-spring to dump 17 pumps. I took a second shot when it was tuned for 4 recharge pumps and got 404 fps... 3 fps higher than the average first shot. That's pretty nice. There are lots of ways to tune these and I'm still getting my feet wet...
One more gratuitous pic (to make sure it happened)
Wyo