Has anyone tried running a expansion chamber with the dye lazurus valve yet?

[jetenginekyle]

I recently got a pmi thor (think empire mini reg but worse in every way) and was wondering what if I had it's output go into an expansion chamber in the Vasa to act as a volumizer.

I'm thinking this would give the valve more air than it would ever need. Since the volume restriction would be gone maybe it would bring down the operating pressure as low as possible

With a super light main spring but heavy hammer I'm thinking the dwell would be long enough to compensate for the lower psi.

Has anyone tested a similar config yet?

[Euphie]

I haven’t tried it but I know from my own tests that dwell has limits at a certain point even with infinite volume of the valve being held open by a ram rather than tapped by a hammer you can’t lower pressure too much more because the ball itself doesn’t stay in front of the bolt for long as it is rapidly accelerating down the barrel.

I did just buy a Lazarus valve though so I might do some more testing to find just how long you can hold it open.

[Chappy]

Expansion chambers rarely make good volumizers for air since they typically have restrictive passages to force the liquid co2 to expand.

[jetenginekyle]

Expansion chambers rarely make good volumizers for air since they typically have restrictive passages to force the liquid co2 to expand.

I didn't know that, the expansion chamber that I have is just a thick wall pipe. Maybe it's a low end one? Kinda weird that restricted passages would make the liquid expand, I'd think it would be the opposite, do you know where I can learn more about the principle behind that behavior?

[Chappy]

I doubt it as they are not very sound principles lol. My APP xchamber was a HUGE gas through with a plate in the middle with a tiny hole. It worked horribly with hpa. I’d call what your are describing a gas through.

[Grendel]

The "restrictive" media serves two functions. One it provides a tortuous path for liquid CO2 to travel through helping ensure phase change and the 2nd more important part is provide a thermal mass to aid in the phase change. Very basic expansion chambers rely only on expansion volume with out considering the thermal conditions needed to support the phase change with a potential moving liquid through your pneumatic system.

[Euphie]

I have a few that are just big open chambers, but I think the idea was have a media inside of them, I used to use BBs, some people have used steel wool, I think the supernova used like shot from a gun or something.

[Psycho91]

I thought about something like this but with the stock trilogy sport springs, I'd use a gas through not an expansion chamber though or I'd just run macro straight to the Vasa and use an adapter,

Been also tossing around the idea of a trilogy sport on 12 grams but the huge valve chamber may not work to well even though they have high pressure springs

[BrendanB]

I have a lazerous in a midget with a delrin hammer and the lightest spring i can find. Have it with a mini ccm HPR and it blast so much air it knocks my hair back. Dont think it will matter.