[y0da900]

Nope, I don't think you ever did. Doesn't make sense in a too good or too bad way? I've got a variant of this valve train that is open bolt as well, it works similarly to an NT but with the chamber feed not the same as the bolt reset air. Some interesting shutoff points in it to allow the bolt to retract without stopping halfway because it acts like an air spring but without leaving the chamber open to atmosphere killing the efficiency that the self retracting bolt can offer.

He's been suspiciously quiet for a few months, right after he released teasers of some of his projects.

[pbjosh]

Well, I am not going to spill Damon's beans. But he should be a bit more availible soon. If not, he is making money, so...

Let me find my old flashdrive and shoot you a pic, I was getting 285-290fps at 135psi, with a total of 1ci chamber. We could use it with your back and simplify your internals there. Merge the two in a way.

[y0da900]

That's about the same energy levels both varieties I've got working right now are using. The power tube version is getting those velocities with 105 psi at a 1.29 ci dump chamber, and the one without the power tube is getting there with 95 psi in a roughly 1.5 ci chamber. Slightly better numbers with the power tube variation, but I haven't done any fine tuning of the other one either.

[pbjosh]

You have mail...

[y0da900]

Finally some pics of the other variation. A set of each is going out to a tester hopefully tomorrow for some head to head testing and some long overdue efficiency testing with HPA. As you can see, my turning has gotten pretty good. My milling, not so much...









This piece does no sealing, and only stops the forward movement of the firing piston and rearward travel of the bolt. The o-ring is just for stability.








Yes, I am aware of how much this looks like a ginormous schrader valve.

[Leafy]

That last one looks like it'll benefit from some 5-axis milling, to radius those ports. I just sold a gun so I'm buying a damn ion board tonight.

[y0da900]

Yeah, it's a bit rough off of a 3-axis. And a crappy 3-axis at that. Damn mini mills. I need to tear the thing apart and give it a solid once over. Maybe come up with some way to reduce some of the backlash without having to replace the screws. I may try filling the column with hydraulic cement to add some much needed mass to it too.

Despite the roughness, it gets promising initial results. I think the flow through that area is just so unrestricted that the edges don't have too detrimental an effect.

[Leafy]

I'm hopefully getting a lucky ace board with a mac noid, waiting for a response.

[y0da900]

A thought in general - a mac 33 is rated for 200 psi, an Epiphany runs quite a bit higher than that normally. Not sure what it will run at with this, but with a normal bolt it's higher.

[Leafy]

yeah well that one fell through anyways. This sucks.

[pbjosh]

Y0da,

I have an epiphany with one of my bolts in it, and I run at about 220-235psi depending on barrel, with the silver insert in it. I figured it was at over 1800 shots on a 68/4500 tank. From my calcs it could be higher.

[WaSTeD TaLeNTz]

nice

[Spitlebug]

Originally Posted by y0da900

Yes, I am aware of how much this looks like a ginormous schrader valve.

First thing I thought of when I saw it...

[Deathwish_DW]

Originally Posted by y0da900

A thought in general - a mac 33 is rated for 200 psi, an Epiphany runs quite a bit higher than that normally. Not sure what it will run at with this, but with a normal bolt it's higher.

I run a mac33'd ion shooting 45+ BPS @ 260+ PSi, no issues.

[y0da900]

I've run over 300 psi through one of mine before accidentally to no ill effect, I'm just not willing to generically recommend that people do it in an open forum.

[Spitlebug]

Originally Posted by y0da900

I've run over 300 psi through one of mine before accidentally to no ill effect, I'm just not willing to generically recommend that people do it in an open forum.

MAC makes a variant of the 33 that does over 300psi. It uses the same noid body.

[y0da900]

Probably just a more robust coil to handle the increased resistance to shifting.

[Spitlebug]

Originally Posted by y0da900

Probably just a more robust coil to handle the increased resistance to shifting.

Yes, that is my supposition as well.

[ThePinkPwrRangr]

Nice bro. nice...

[y0da900]

[<((0))>]

Originally Posted by y0da900

"" isn't enough here, possibly followed by then ending with a , and yet, somehow that still feels.... inadequate

thats friggin awesome man, now i need an ion

also, price?