2400 co2 to PCP question.
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2400 co2 to PCP question.
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Topic: 2400 co2 to PCP question. (Read 3564 times))
45Bravo
Self confessed addict of anything with a trigger..
GTA Senior Contributor
Posts: 2953
3 people can keep a secret, if 2 of them are dead.
Real Name: Ian
2400 co2 to PCP question.
«
on:
April 13, 2014, 02:43:00 AM »
Today I scored a few things from Craigslist, and I have a question y'all may be able to answer.
I picked up a 1077 with an extra air source adapter, and the regular cap for 12 gram use.
Also in the box with the was a end cap with a foster fitting..
On the 1077 (or on my 2400) what would I need to do to my gun to make it strictly air, PCP?
«
Last Edit: April 14, 2014, 12:54:25 AM by 45Bravo
»
Logged
Houston, Tx.
I make 2 predictions;
ON THE DATE WHEN US TROOPS ARE ISSUED AN Energy Pulse Weapon,
1. The US Soldier will have on his person a version of the Colt 1911.
2. He will be aiming the NEW Weapon at someone carrying an AK47.
Big Bore Bart
Expert
Posts: 1613
yes
Real Name: Bart
Re: 2240 co2 to PCP question.
«
Reply #1 on:
April 13, 2014, 03:53:40 AM »
The 2400 needs a Disco valve cap for the extension and the O-ring. The 1077 needs a cap with an O-ring. Keep the pressure below 1500 and the 1077 should be good as a PCP.
Logged
Oroville, CA
1377V2 FT P&V, custom steel breech
766V2 FT P&V, M-Rod style breech o-ring, pin probe, light springs, trigger work.
Custom 22 pumper. 2260 barrel, 13xx grip, FT P&V, side lever breech, 8" stroke pump
1971 Crosman 1400 O-ring piston, 13xx t-port, opened ports
1989 Crosman 2200 Magnum V3 in process of PCP conversion
1962 C180 (JC Higgens) .22 (needs a tube)
1972 C760 SC No mods, may be come a .22
2100 PCP conversion
.25 gen1 Mrod under reconstruction
1940's Atlas 10" lathe
Ribbonstone
GTA Senior Contributor
Posts: 12030
Re: 2240 co2 to PCP question.
«
Reply #2 on:
April 13, 2014, 11:25:23 AM »
Just be careful of fill pressure. It’s not so much worry about the tube, but concern about how the valve is secured to the tube. Better would be to add some valve retention.
If you need the reasoning:
As issued the system jams a 12gr. into a seal on the end of the valve. So the only thing that is pressurized is the inside of the valve.
Bulk fill or air use a valve body that allows you to pressurize the tube, so gas pressure acts on the outside diameter of the valve.
Valve is held in place on a Crosman by one small screw. It gets by with this because the only gas pressure pushing the valve rearwards is pushing on the inside diameter of the valve. If they had originally designed 2240’s as bulk fill guns, the valve would have been retained more strongly (as it was on their old bulk fill guns).
Basically, the issue 2240 system has about .20 square inches of area to push back (the inside of the valve). Bulk valves have about .42” of area (outside area of the valve) for the pressure to act on.
So by bulk filling on co2, the force is about doubled on that little retention screw. Air at 1600psi would just about triple the force.
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Louisiana
Big Bore Bart
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Posts: 1613
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Real Name: Bart
Re: 2240 co2 to PCP question.
«
Reply #3 on:
April 13, 2014, 02:50:08 PM »
Ribbonstone is right.
I just presumed
Ian understood the need to beef up the valve securing. The 1077 is closer to the 1100 shotgun than to any other Crosman, except the 357 revolver. Studying the
EVP
leads me to believe the 1077 may be convertible by simply turning an O-ring groove into the "Piercing Plug" and adding two more screws to said plug.
Logged
Oroville, CA
1377V2 FT P&V, custom steel breech
766V2 FT P&V, M-Rod style breech o-ring, pin probe, light springs, trigger work.
Custom 22 pumper. 2260 barrel, 13xx grip, FT P&V, side lever breech, 8" stroke pump
1971 Crosman 1400 O-ring piston, 13xx t-port, opened ports
1989 Crosman 2200 Magnum V3 in process of PCP conversion
1962 C180 (JC Higgens) .22 (needs a tube)
1972 C760 SC No mods, may be come a .22
2100 PCP conversion
.25 gen1 Mrod under reconstruction
1940's Atlas 10" lathe
Ribbonstone
GTA Senior Contributor
Posts: 12030
Re: 2240 co2 to PCP question.
«
Reply #4 on:
April 13, 2014, 03:36:21 PM »
Problem with the 1077 is that pulling the trigger rolls back the hammer spring. So if you were to increase pressure higher than CO2, would need a stronger spring to open the valve, which would make for a stiffer trigger pull. Can b done, but it does nothing good for accuracy.
Besides, it's spring going into summer, where co2 is at it's best. Would worry about air about the end of Sept. or Oct.
Logged
Louisiana
45Bravo
Self confessed addict of anything with a trigger..
GTA Senior Contributor
Posts: 2953
3 people can keep a secret, if 2 of them are dead.
Real Name: Ian
Re: 2240 co2 to PCP question.
«
Reply #5 on:
April 13, 2014, 11:48:04 PM »
It was late lat night when I got home and made the post, and after a few daquri's..
I wasn't thinking too well.
This morning I woke up and was thinking things over and thinking about the 2400..
And remembered it is not a presurized tube.. So that is out other than putting an air chamber on the end of the tube, and a probe to reach the valve seat..
I have never been inside the 1077, so can't answer about how it is sealed..
But the extra end cap I got has an oring, and a foster fitting, but it doesn't have a valve in it, just a open tube.
So I would guess at the minimum I would need a different fitting on the cap if I wanted to pressurize the tube.
The cap is pictured below.
Along with the bulk co2 system for the 1077.
It looks like I can make a shorter probe and use the 88 or 90 gram tanks on my 2400..
In doing the math last night I don't know how much of a savings it would be. (I was a little impared while doing the math in my head)
I buy my co2 12 grams in bulk so pay about .40 each
The 90 gram bulbs are almost $14 for 2 at Walmart..
I didn't price the 88 gram.
Currently I get 30 good consistent shots from my 2400 per each 12 gram..
Logged
Houston, Tx.
I make 2 predictions;
ON THE DATE WHEN US TROOPS ARE ISSUED AN Energy Pulse Weapon,
1. The US Soldier will have on his person a version of the Colt 1911.
2. He will be aiming the NEW Weapon at someone carrying an AK47.
rsterne
Member 2000+fps Club
Bob and Lloyd
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Posts: 26956
GTA Forums Person of the Year 2017
Real Name: Bob
Re: 2240 co2 to PCP question.
«
Reply #6 on:
April 14, 2014, 12:34:15 AM »
Actually, in a 22XX, the area the CO2 pushes on is much smaller, it is only the diameter of the seal on the front of the valve where the CO2 cartridge pushes.... It's about 1/4" diameter, so the area is only 1/9th of the area of the 3/4" ID of the tube.... There is an additional end force due to tightening the end cap and forcing the CO2 cartridge against the valve, but if you only do it up finger tight, it's not very much....
Once you seal the valve into the tube and fill the tube, the forces skyrocket, hence the need for the three (larger) screws locating the Disco valve....
Bob
Logged
Coalmont, BC, Canada
🇺🇦
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦
Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).
Big Bore Bart
Expert
Posts: 1613
yes
Real Name: Bart
Re: 2240 co2 to PCP question.
«
Reply #7 on:
April 14, 2014, 12:57:05 AM »
I
think
I see where that fitting goes. Unscrew the aluminum piece the 88gr screws into, and the Foster adapter should screw right in. Then you attach a remote regulated tank to the Foster.
Logged
Oroville, CA
1377V2 FT P&V, custom steel breech
766V2 FT P&V, M-Rod style breech o-ring, pin probe, light springs, trigger work.
Custom 22 pumper. 2260 barrel, 13xx grip, FT P&V, side lever breech, 8" stroke pump
1971 Crosman 1400 O-ring piston, 13xx t-port, opened ports
1989 Crosman 2200 Magnum V3 in process of PCP conversion
1962 C180 (JC Higgens) .22 (needs a tube)
1972 C760 SC No mods, may be come a .22
2100 PCP conversion
.25 gen1 Mrod under reconstruction
1940's Atlas 10" lathe
45Bravo
Self confessed addict of anything with a trigger..
GTA Senior Contributor
Posts: 2953
3 people can keep a secret, if 2 of them are dead.
Real Name: Ian
Re: 2400 co2 to PCP question.
«
Reply #8 on:
April 14, 2014, 01:52:18 AM »
The aluminum piece has the small threads for the 88 grams on one end, and then a valve, and then standard coarse thread paintball threads that fit the regulator.
The only places that have a foster fitting is the side that has the probe on it.
You can remove the long probe, and the screw the o ring cap on, and then attach the bulk tank to the oring cap.
I will call the original owner and get what his intent for that cap was.
Logged
Houston, Tx.
I make 2 predictions;
ON THE DATE WHEN US TROOPS ARE ISSUED AN Energy Pulse Weapon,
1. The US Soldier will have on his person a version of the Colt 1911.
2. He will be aiming the NEW Weapon at someone carrying an AK47.
Big Bore Bart
Expert
Posts: 1613
yes
Real Name: Bart
Re: 2400 co2 to PCP question.
«
Reply #9 on:
April 14, 2014, 02:29:00 AM »
The black piece should replace the silver piece in the reg. Then a tank can be hooked to the reg via hose.
Logged
Oroville, CA
1377V2 FT P&V, custom steel breech
766V2 FT P&V, M-Rod style breech o-ring, pin probe, light springs, trigger work.
Custom 22 pumper. 2260 barrel, 13xx grip, FT P&V, side lever breech, 8" stroke pump
1971 Crosman 1400 O-ring piston, 13xx t-port, opened ports
1989 Crosman 2200 Magnum V3 in process of PCP conversion
1962 C180 (JC Higgens) .22 (needs a tube)
1972 C760 SC No mods, may be come a .22
2100 PCP conversion
.25 gen1 Mrod under reconstruction
1940's Atlas 10" lathe
sixshootertexan
Expert
Posts: 1835
yes
Real Name: Ricky B
Re: 2400 co2 to PCP question.
«
Reply #10 on:
April 14, 2014, 04:09:08 PM »
I use that fitting with a HPA bottle on my rifle.
Logged
Magnolia,TX
CCS 2300, CCS 2400, Custom Built Regulated .25, Custom Built PRod Clone, .308 Bullet shooter, XS46U .177, 850 Hammerli, Custom Built Regulated .177, Benjamin 392, Crosman 2200
Ribbonstone
GTA Senior Contributor
Posts: 12030
Re: 2400 co2 to PCP question.
«
Reply #11 on:
April 14, 2014, 04:28:54 PM »
Black cap with a nipple looks like it's made for an ASA (paintball thread) fitting. On a paintball marker, you'd screw that in where the paintball tank goes and hook a remote line to it. Doesn't have a whole lot of airgun use, but have used one like it screwed into a QB79 to run it from a remote line.
Logged
Louisiana
dippingriz
Supl[r]ise!
Plinker
Posts: 139
yes
Re: 2400 co2 to PCP question.
«
Reply #12 on:
April 15, 2014, 01:03:51 AM »
"
Quote from: sixshootertexan on April 14, 2014, 04:09:08 PM
I use that fitting with a HPA bottle on my rifle.
"
Big balls in cow town brother
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Marauder .25
Taipan Mutant Standard .22
Xisico XS46U tuned by Mike
Benjamin 397
Taipan Mutant .22 Review:
http://www.gatewaytoairguns.org/GTA/index.php?topic=113290.new#new
Benjamin Marauder .25 Project
http://www.gatewaytoairguns.org/GTA/index.php?topic=99233.0
xs46u review
http://www.gatewaytoairguns.org/GTA/index.php?topic=66281.msg632996#msg632996
dippingriz
Supl[r]ise!
Plinker
Posts: 139
yes
Re: 2400 co2 to PCP question.
«
Reply #13 on:
April 15, 2014, 11:26:08 PM »
Placemarker for interest in thread. I really want to HPA my 2400kt
Logged
Marauder .25
Taipan Mutant Standard .22
Xisico XS46U tuned by Mike
Benjamin 397
Taipan Mutant .22 Review:
http://www.gatewaytoairguns.org/GTA/index.php?topic=113290.new#new
Benjamin Marauder .25 Project
http://www.gatewaytoairguns.org/GTA/index.php?topic=99233.0
xs46u review
http://www.gatewaytoairguns.org/GTA/index.php?topic=66281.msg632996#msg632996
LET
Plinker
Posts: 249
yes
Real Name: Larry
Re: 2400 co2 to PCP question.
«
Reply #14 on:
April 16, 2014, 05:33:24 PM »
If you want to use HPA on the 2400 I would go hear
www.powermax-hipac.com/Pages/default.aspx
By doing it this way you don't put the pressure on the whole tube, it feed through the valve like a CO2 cart.
Logged
Albert Lea, MN
Umarex Gauntlet .22 and Hiram hand pump.
Crosman 2400KT .177 18" Barrel & 6.5" TKO Bug Buster 3x9x32
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