Author Topic: Liberty plenum (Read 6273 times - 1 votes)
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darkcharisma · « **Reply #60 on:** May 16, 2019, 02:18:15 PM »

yah Billy is on vacation. i made a crude 19cc plenum but broke a tool so it also on halt.

Madd Hatter · « **Reply #61 on:** July 01, 2019, 09:54:24 PM »

This is the next thing to buy for my Liberty.

Stikkershokk · « **Reply #62 on:** July 02, 2019, 12:22:36 AM »

Sounds like a fun add on.

darkcharisma · « **Reply #63 on:** July 02, 2019, 01:04:28 AM »

I am currently working on the crude plenum...Hopefully I can finish it end of this week, cause week after that I am going vacation "again" haha. California I come!

wll2506 · « **Reply #64 on:** July 02, 2019, 11:53:53 AM »

From the looks of things, the larger plenum and a little extra air port size may be the key to higher velocity while keeping the shot count up .... I'm watching !

wll

Madd Hatter · « **Reply #65 on:** July 02, 2019, 02:42:21 PM »

Quote from: darkcharisma on July 02, 2019, 01:04:28 AM

I am currently working on the crude plenum...Hopefully I can finish it end of this week, cause week after that I am going vacation "again" haha. California I come!

Madd Hatter · « **Reply #66 on:** July 15, 2019, 07:54:43 PM »

So what's the word on the bigger plenum? I'd love one with a gauge on the bottom to know for sure what the reg is doing.

USAFANG6799 · « **Reply #67 on:** July 15, 2019, 08:16:43 PM »

I heard a pin drop after you asked that question.
The theory sounds solid.

Madd Hatter · « **Reply #68 on:** July 15, 2019, 10:35:47 PM »

Billy was already testing one and getting higher vel with the reg set lower than stock aka original.

darkcharisma · « **Reply #69 on:** July 15, 2019, 11:24:03 PM »

did he post the results here?

Madd Hatter · « **Reply #70 on:** July 15, 2019, 11:54:20 PM »

Post 39 on the first page.

huklbery · « **Reply #71 on:** July 16, 2019, 08:44:08 AM »

Quote from: Robert Feddeler on July 15, 2019, 07:54:43 PM

So what's the word on the bigger plenum? I'd love one with a gauge on the bottom to know for sure what the reg is doing.

I'm thinking when I get some time to do an extension rather than a replacement. The trepanning of the 16mm O ring on the face seal is a bit of a bother, in comparison to the OD of the plug end.

darkcharisma · « **Reply #72 on:** July 16, 2019, 12:01:16 PM »

thats not a bad idea, and extension. it maybe just a few cc added going that route but will be much easier to make.

once i get Billy's plenum, i think my rifle will wake up and hopefully i can hit 60fpe with all my mods and my valve. then going .25 cal will even get it close to 70fpe range.

i am still being conservative.

huklbery · « **Reply #73 on:** July 16, 2019, 12:09:12 PM »

Quote from: darkcharisma on July 16, 2019, 12:01:16 PM

thats not a bad idea, and extension. it maybe just a few cc added going that route but will be much easier to make.

once i get Billy's plenum, i think my rifle will wake up and hopefully i can hit 60fpe with all my mods and my valve. then going .25 cal will even get it close to 70fpe range. i am still being conservative.

That's my thinking, it will allow me to test velocity "out of stock". If it does prove out to be a velocity throttle, it would be simple enough to port my wood stock. Like the 10/22 the flush mag is comfortable but its still doable as a shooter with an extension.

huklbery · « **Reply #74 on:** July 28, 2019, 03:14:17 PM »

After the 29 fps gain with the modest plenum extension it became clear stumbling in the dark on the regulator pressure isn't helping.. Used one of the extension blanks to make a Gauge rig.

Madd Hatter · « **Reply #75 on:** July 28, 2019, 03:49:00 PM »

What thread is the part of the plenum that threads into the receiver?

huklbery · « **Reply #76 on:** July 28, 2019, 03:52:10 PM »

Quote from: Robert Feddeler on July 28, 2019, 03:49:00 PM

What thread is the part of the plenum that threads into the receiver?

10mm 1.25 pitch

Back of Plenum
16mm 1.25 pitch

Madd Hatter · « **Reply #77 on:** July 28, 2019, 04:03:38 PM »

Thank you!

Pb_zepplin · « **Reply #78 on:** December 31, 2019, 12:42:06 AM »

After the Fx plenum discussion I figured it might be time to bring this backup. Did anyone ever figure out the maximum FPE and shot count with an extended plenum? Anyone have an extended volume version on a wood stock liberty?

darkcharisma · « **Reply #79 on:** December 31, 2019, 09:52:56 PM »

https://www.gatewaytoairguns.org/GTA/index.php?topic=160469.180

go to the last page, some limited testing infor on the larger plenum Billy sent me

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Liberty plenum

Author Topic: Liberty plenum (Read 6273 times - 1 votes) )

Author Topic: Liberty plenum (Read 6273 times - 1 votes)
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