Author Topic: SPA M16 additional plenum... (Read 5494 times))

miksatx · « **Reply #20 on:** March 05, 2019, 02:37:23 PM »

Quote from: mackeral5 on March 05, 2019, 09:26:52 AM

Quote from: miksatx on March 05, 2019, 08:28:06 AM
I just measured the cc on my .22 Airmax Dominator and I get 10cc just like the p-15. In the pic the plenum block filled to the top with 12cc syringe with 2cc left.

I figured the 3cc was a little off.

Do the P15 and the M16/Dominator have the same threads in the tube?

Sorry I missed this post mike
2mm difference in tube sizes in the dom and p15.

MB · « **Reply #21 on:** March 05, 2019, 10:01:40 PM »

Quote from: mackeral5 on March 05, 2019, 09:26:52 AM

Quote from: miksatx on March 05, 2019, 08:28:06 AM
I just measured the cc on my .22 Airmax Dominator and I get 10cc just like the p-15. In the pic the plenum block filled to the top with 12cc syringe with 2cc left.

I figured the 3cc was a little off.

Do the P15 and the M16/Dominator have the same threads in the tube?

Yes good question, I have made contact Mike, will let you know if it does and what price, it was listed at 3000 Russian Roubles based on current exchange that should be around US$45 , will let you know as soon as I do...

mackeral5 · « **Reply #22 on:** March 05, 2019, 11:23:57 PM »

Quote from: MB on March 05, 2019, 10:01:40 PM

Quote from: mackeral5 on March 05, 2019, 09:26:52 AM
Quote from: miksatx on March 05, 2019, 08:28:06 AM
I just measured the cc on my .22 Airmax Dominator and I get 10cc just like the p-15. In the pic the plenum block filled to the top with 12cc syringe with 2cc left.

I figured the 3cc was a little off.

Do the P15 and the M16/Dominator have the same threads in the tube?

Yes good question, I have made contact Mike, will let you know if it does and what price, it was listed at 3000 Russian Roubles based on current exchange that should be around US$45 , will let you know as soon as I do...

Sounds great. Thank you.

MB · « **Reply #23 on:** March 06, 2019, 10:37:25 PM »

Mike was in communication Huub at Huma air, M16 and P15 different reg size and airtube diameter, have asked these guys if they could make for a P15...

mackeral5 · « **Reply #24 on:** March 06, 2019, 11:34:49 PM »

Fingers crossed ...

Atom · « **Reply #25 on:** March 07, 2019, 12:31:33 PM »

Here should make custom parts

https://www.aliexpress.com/item/Customized-Custom-Stainless-Steel-Cnc-Machining-Stainless-brass-Aluminium-Parts-Fabrication/32976451161.html?spm=2114.search0104.3.54.4449303b6bs73F&ws_ab_test=searchweb0_0,searchweb201602_10_10065_10068_319_10059_10884_317_10887_10696_321_322_10084_453_10083_454_10103_10618_10307_537_536_10902,searchweb201603_56,ppcSwitch_0&algo_expid=3a157d05-4f0d-4378-8c59-ea8d22d9f2c3-8&algo_pvid=3a157d05-4f0d-4378-8c59-ea8d22d9f2c3

Pelletjunkie · « **Reply #26 on:** March 11, 2019, 11:17:09 AM »

Mike D, empty your mailbox, it’s full and I can’t send you a pm.

mackeral5 · « **Reply #27 on:** March 11, 2019, 11:56:33 AM »

Quote from: Pelletjunkie on March 11, 2019, 11:17:09 AM

Mike D, empty your mailbox, it’s full and I can’t send you a pm.

Cleaned it out, please resend. Thank you

Atom · « **Reply #28 on:** March 29, 2019, 10:41:43 PM »

A plenum arrived they are now testing

smythsg · « **Reply #29 on:** March 29, 2019, 11:54:21 PM »

Watching with interest

Atom · « **Reply #30 on:** March 31, 2019, 02:06:38 AM »

By adding plenum get it is about 10 m / s (33fps) on the M16 6.35 mm (0.25) before 255 m/s after 265 m/s

Atom · « **Reply #31 on:** March 31, 2019, 02:17:32 AM »

After this drilled a enter valve at 7 mm exit valve 6 mm transfer port 6 mm and barrel port 5mm made oblong hole.The measurements continue...

Atom · « **Reply #32 on:** March 31, 2019, 02:28:09 AM »

When drilled the hole on valve and transfer port o-ring started to break in to pransfer port when pressure began to fill.
So you need to make a shim 12 mm OD 9 mm ID and 0.5 mm thick...

Wayne52 · « **Reply #33 on:** March 31, 2019, 06:09:31 AM »

I remember when a member in Texas built three bottle versions of these SPAM16's with parts he ordered direct from SPA soon after the M16 hit the market, he used Lothar Walther poly barrels on all three of them because you can't order barrels from China. The only one of the three that he didn't further pursue power wise was the .25 because of the fact the plenum was way too small.

Atom · « **Reply #34 on:** April 01, 2019, 06:01:45 PM »

With this change it gets 294m/s (965 fps) JSB King = 71J (53fpe) and 263m/s JSB King Heavy =76J(56.5fpe) !

Still need to work heavier hammer and harder spring...

mackeral5 · « **Reply #35 on:** April 01, 2019, 10:43:01 PM »

Quote from: Atom on April 01, 2019, 06:01:45 PM

With this change it gets 294m/s (965 fps) JSB King = 71J (53fpe) and 263m/s JSB King Heavy =76J(56.5fpe) !

Still need to work heavier hammer and harder spring...

Take a look at going to a harder poppet material, such as peek, ~~and reducing the poppet diameter as small as possible. Once this is done the OEM hammer and spring should be good for getting into the mid 60fpe range.~~

Atom · « **Reply #36 on:** April 02, 2019, 01:18:11 AM »

Quote from: mackeral5 on April 01, 2019, 10:43:01 PM

Quote from: Atom on April 01, 2019, 06:01:45 PM
With this change it gets 294m/s (965 fps) JSB King = 71J (53fpe) and 263m/s JSB King Heavy =76J(56.5fpe) !

Still need to work heavier hammer and harder spring...

Take a look at going to a harder poppet material, such as peek, and reducing the poppet diameter as small as possible. Once this is done the OEM hammer and spring should be good for getting into the mid 60fpe range.

Sincerely I did not understand yours suggestion ,can you explain on the photo?

mackeral5 · « **Reply #37 on:** April 02, 2019, 07:05:43 AM »

Quote from: Atom on April 02, 2019, 01:18:11 AM

Quote from: mackeral5 on April 01, 2019, 10:43:01 PM
Quote from: Atom on April 01, 2019, 06:01:45 PM
With this change it gets 294m/s (965 fps) JSB King = 71J (53fpe) and 263m/s JSB King Heavy =76J(56.5fpe) !

Still need to work heavier hammer and harder spring...

Take a look at going to a harder poppet material, such as peek, and reducing the poppet diameter as small as possible. Once this is done the OEM hammer and spring should be good for getting into the mid 60fpe range.
Sincerely I did not understand yours suggestion ,can you explain on the photo?

I edited the post. Disregard the part about reducing poppet diameter.

Atom · « **Reply #38 on:** April 03, 2019, 09:14:55 AM »

With this power I have 35 pieces

Airgunhunter73 · « **Reply #39 on:** April 04, 2019, 01:22:33 PM »

How can I order one of these plenums I'd like to try it in my M16 25.

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SPA M16 additional plenum...

Author Topic: SPA M16 additional plenum... (Read 5494 times))