Classic Valve, volume chamber?

Seymour · 07-13-2011, 05:38 PM

So Im tearing apart my Classic valve, and I never knew the power tube came off of the valve. When I realized this, I screwed it off just out of curiosity, and realized theres a volume chamber. Now my question is, is this chamber supposed to be empty, or is my valve missing a part?

Ando · 07-13-2011, 06:45 PM

Empty but you can add to it. You'll need more pressure to get the marker to your desired FPS if you put something in. Be very careful with the oring inside there. You'll be calling Tuna for a new one.

Seymour · 07-13-2011, 06:53 PM

What could I put in there? Also, which o-ring? The red one on the threads of the powertube?

Ando · 07-13-2011, 06:54 PM

Yes, the red one.

Washers, plastic or nylon.

Seymour · 07-13-2011, 07:10 PM

Why would I put washers in the volume chamber?

Ando · 07-13-2011, 07:42 PM

For normal operation...There's no need but if converting to a pump mag on 12 grams, you can get a good 10-15 more shot off of one. Less volume in the chamber means less air being used but you'll need to bump the velocity/pressure to sustain your FPS.

Seymour · 07-13-2011, 07:47 PM

Eh, doesnt apply to me then. Thanks for the info man!

russc · 07-13-2011, 08:02 PM

It'll give you better efficiency on air, too.

Seymour · 07-13-2011, 08:13 PM

So, what sort of washer would I need?

Spider! · 07-14-2011, 11:21 AM

Quote:

Originally Posted by Seymour

So, what sort of washer would I need?

3/8" nylon, turned down a little are good. Flyingpootang has some good pics here...

Automags.Org Online Forums - 30 Shots from a classic valve w/ a 12G

Hill gets around to the dump chamber here on MCB...

Attempted efficiency mod on a mag

Production dump chambers are made for a wide variety of weather, efficiency, and paint. Squeezing them down usually makes the marker more efficient at the price of higher ball (and maybe LPR [matrix]) pressures. I also hit the same condition FP did with the de-volumized classic mag not being able to make good velocity with HPA.

07-13-2011, 05:38 PM	#1 (permalink)
Seymour Post Whore Join Date: Dec 2010	Classic Valve, volume chamber? So Im tearing apart my Classic valve, and I never knew the power tube came off of the valve. When I realized this, I screwed it off just out of curiosity, and realized theres a volume chamber. Now my question is, is this chamber supposed to be empty, or is my valve missing a part? __________________ My feedback! http://www.mcarterbrown.com/forums/f...ml#post1615517 http://www.x7og.net/feedback-b-s-t/2...-feedback.html

07-13-2011, 06:45 PM	#2 (permalink)
Ando Formerly known as DMex Join Date: Jul 2009 Location: Glen Burnie, MD.	Empty but you can add to it. You'll need more pressure to get the marker to your desired FPS if you put something in. Be very careful with the oring inside there. You'll be calling Tuna for a new one. __________________ WTB NOXX Tac1 Springfeed and Javelin Twister Barrel...PM Me!!!

07-13-2011, 06:53 PM	#3 (permalink)
Seymour Post Whore Join Date: Dec 2010	What could I put in there? Also, which o-ring? The red one on the threads of the powertube? __________________ My feedback! http://www.mcarterbrown.com/forums/f...ml#post1615517 http://www.x7og.net/feedback-b-s-t/2...-feedback.html

07-13-2011, 06:54 PM	#4 (permalink)
Ando Formerly known as DMex Join Date: Jul 2009 Location: Glen Burnie, MD.	Yes, the red one. Washers, plastic or nylon. __________________ WTB NOXX Tac1 Springfeed and Javelin Twister Barrel...PM Me!!!

07-13-2011, 07:10 PM	#5 (permalink)
Seymour Post Whore Join Date: Dec 2010	Why would I put washers in the volume chamber? __________________ My feedback! http://www.mcarterbrown.com/forums/f...ml#post1615517 http://www.x7og.net/feedback-b-s-t/2...-feedback.html

07-13-2011, 07:42 PM	#6 (permalink)
Ando Formerly known as DMex Join Date: Jul 2009 Location: Glen Burnie, MD.	For normal operation...There's no need but if converting to a pump mag on 12 grams, you can get a good 10-15 more shot off of one. Less volume in the chamber means less air being used but you'll need to bump the velocity/pressure to sustain your FPS. __________________ WTB NOXX Tac1 Springfeed and Javelin Twister Barrel...PM Me!!!

07-13-2011, 07:47 PM	#7 (permalink)
Seymour Post Whore Join Date: Dec 2010	Eh, doesnt apply to me then. Thanks for the info man! __________________ My feedback! http://www.mcarterbrown.com/forums/f...ml#post1615517 http://www.x7og.net/feedback-b-s-t/2...-feedback.html

07-13-2011, 08:13 PM	#9 (permalink)
Seymour Post Whore Join Date: Dec 2010	So, what sort of washer would I need? __________________ My feedback! http://www.mcarterbrown.com/forums/f...ml#post1615517 http://www.x7og.net/feedback-b-s-t/2...-feedback.html

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