[xluben]

Originally Posted by dagger06

I mean instead of having a hose go from the gauge outlet to the donut like you have it, have a hose going from the empty third barb on the 4 way to the donut.
Like this.
http://img340.imageshack.us/img340/6...sembledfv0.jpg

Ah, that's Ydna's mech ion. He made the original (which has been stolen).

He did use an Autococker "4-way" valve, and yes, in theory, you could
route air to the firing chamber through the valve, but you'd get
HORRIBLE shootdown/velocity problems. The firing chamber would be
trying to recharge and dump at the same time. Even with a direct line
running to the firing chamber, you need to feed the firing chamber with
larger than 1/8” hose (I tried, it didn’t like it).

I expanded/refined his design a bit to make it all internal. Here's my
thread on Pbnation:

my mechanical ion project (pics) - PbNation

and here’s the layout:



Hope that makes sense to you. It all physically fits into the same
places as a stock on. It will work fine with your body. The only
deviation from that ‘schematic’ is that the “T” fitting I used was
comprised of two separate pieces in order to reduce hose size going to
the 3-way.

If you already have the bolt and a QEV you will only need:

Smart parts hose kit - $3
Clippard smav-3 valve - $16 (@ airsoldier.com)
Reducing “T” fitting - $7 (not sure, I got it locally hard to find online)

And a couple set screws to hold the valve down, should be pretty easy/cheap.

Let me know if you have any other questions.