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Dean's HiPac 2240

Tactical Trijicon ACOG TA01 Style 4x32 Cross Sight Rifle Scope + Kill Flash
TROBB Solid Aluminium Dovetail Power Block with Gmac hollow probe and G-mac Bolt
Gmac Brass Power Adjuster Spring And Guide/Drilled Out Standard Valve For more air space
Hammer Mods//Gmac 30% Lighter valve Spring/Gmac Brass Safety Catch//Transfer port drilled out
Full Gmac Trigger kit/Gmac barrel cut to 9inch/Weihrauch Silencer/Custom Home Made Grips/
New TRACER LEDRAY GL2 LAMP 90m Range Beam//HI-Pac

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Well, you owners of the Hipac have me convinced....

February 10 2012 at 9:46 AM
  (Login VAFarmer)
Crosman Forum Member
from IP address

gonna definitely get one when they are available. Does the guy post here? Rekon he will let us know availability?

Crosman just emailed yesterday with this baby on the way.


yeah I know, plain Jane, but I hunt with nearly every ag I have, this one will be no different.
I dont look AT them, I look DOWN them happy.gif

Does the valve need to secured by a mod of some sort, to go with this higher pressure?

If so, please point me to a pictorial link.

I think I have found all I need for the valve mods.
I have a good handle on the trigger work needed, and may try some fabbing of my own.

The way I understand it, the hipacs can be used for bulk co2 or hpa, correct? Niiiiice..........

Gonna see what she does with valve mod and adjuster. this oughta keep me busy till the hipac are available again soon.

Would like to know any of you guys that have attached wire-stocks to the back of the tube...are these solid? I mean, if you slipped with it, and landed on it, would it stand up to it, or break at that point?

I have the pistol grip stock coming, but my ULTIMATE DREAM needs to incorporate more of a takedown design.
Let me share my vision......

A 24 inch case....
Opens up and there in the foam is the whole shebang........a takedown .22 air rifle, cart-bulk-hipac powered, with a red dot and a sling, can of pellets on one side of the case....
While on the other side....is a takedown spinning/fly combo, and a small tackelbox of the best lures I know of.

Its starting to come together....

God bless,


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dan house
(Login dan_house)
Crosman Forum Member

Last time I Looked on theHiPAc site

February 10 2012, 9:50 AM 

you had to order it, then wait the 4 -6 weeks till it was ready.

could be wrong....


dr_subsonic's pneumatic research lab
[linked image]
the Lunatic Fringe of American Airgunning
Southwest Montana's headquarters for Airgunning Supremacy
Proud Sponsor of team_subsonic

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Lou Hauburger
(Login degriz)
Crosman Forum Member


February 10 2012, 5:06 PM 


Here is the link to his sight, contact Alex and check on availability. He has always answered in a timely manner.

Here is my Hipac 2250


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(Login gubb33ps)
Crosman Forum Member

Part guesses...

February 10 2012, 6:39 PM 

..believe it is a one-man operation, with a "tame" machinist (meaning he's not part of the organization, but does the construction of parts as a run). The HiPac conversions are a side-line to his "real" job.

The front ends are kind of universal (meaning the front section of a 22450/2250/2260 conversion tube are the same, it is the tube length that varies).

So am thinking that he gets the machinist to make a run of tube every so often...sells the stock he has...then gets another run made. It is not like he keeps a crap load of them in stock.

Does seem like the 2240.2250 length conversions are out of stock right now (the 2260 conversions are in stock), but I'd think the 2240 conversions would be his "bread and butter" units, out selling the others by a good margin,so they are likely to be back in stock first.

The only "work" is retaining the valve better...you can do that and NOT keep the gun from notmal operation with 12gr.

In fact, that's the best part of the conversion...can always just unscrew the HiPac tube and go back to 12gr. (or use the conversion tube as a co2 bulk fill device).

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Tony in Puerto Rico
(Login turbonoma)
Crosman Forum Member

It's reliable

February 10 2012, 7:06 PM 

Here's mine
[linked image]

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(Login icufuzz)
Crosman Forum Member

Approx how many

February 11 2012, 9:36 AM 

shots are possible from a 1800 psi fill...??

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(Login gubb33ps)
Crosman Forum Member

How fast you want it to go?

February 11 2012, 1:39 PM 

Have a small volume of air to work from, so speed is really going to cost shot count.
What Unit...2240/2250/2260 (different volumes, so could set them for the same speeds but see a big difference in shot count).

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(Login gubb33ps)
Crosman Forum Member

Best example

February 11 2012, 3:03 PM 

OK..the best shot count I've arranged. Of course it is low powered. Wanted this little 177/2260 to be my R7 of PCPs so its doing a little over 7 foot pounds (call it 625fps with 8.4gr). Its gets used to punch paper more than anything else, but would make a fine pest bird rifle (r anything else you could use an R7 for).
[IMG][linked image][/IMG]

Barrel is a mystery barrel that came to me in a parts trade, no idea what it came off of other than it LOOKS like an RWS springer barrel (one of the old long-barreled 34's?) that got cut at the breech. Sat around for a couple of years before I got around to fitting it to a Crosman breech and making a 1/8 riser/spacer. HiPac conversion tube, some fiddling around with transfer ports, striker weights, and spring tensions.

Sweet spot lives at 1900 1200psi, gives 50 good shots between 615 and 635fps. A little windy today, so these short range (20 yard) groups are spread out horizontally. Has done better on calm days (a .177 pellet at 620fps just does not ignore even light breezes).
[IMG][linked image][/IMG]

Could shoot more, but at higher fill pressure it shoots a bit low...and at lower fill pressures it shoots a bit low...so I stay inside the 1900-1200psi window and just shoot 50 times before refilling.

So..to ball park it. If everything (including barrel length) were the same, and a 2260 HiPac is about 2.5-3X larger than a 2240 HiPac...then a 2240 sized tube set up like this would get something like 20-16 shots.

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(Login gubb33ps)
Crosman Forum Member

Found a file from tuning the .22 2260 HiPac

February 11 2012, 4:26 PM 

Sis some changes after this, getting it to run at a little higher pressure, but think the total energy out put for the sweet spot is about the same (25 15 foot pound shots vs 20 18 foot pound shots).

Crosman 2260 HiPac
14.3gr. CP

[IMG][linked image][/IMG]


680 135BAR
685 90BAR


3% rule = 20fps = 699 679 = 24shots

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(Login Mike17670)
Crosman Forum Member


February 10 2012, 7:12 PM 

Did you pin your valve before installing the kit?


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(Login ehbob)
Crosman Forum Member


February 10 2012, 7:58 PM 

I am getting 10 shots out of a custom shop 2300. 14" barrel, trigger job, Stacie breech.
40 pumps to 3000psi 10 shots from 765fps to 700fps. Then 25 pumps to bring it back up. Getting 10 shot dime sized groups at 30' with 14.8 gr, pellets. Im liking it, doubt if I will do anything else to it besides shoot it. Pellets flatten out and break up when they hit the 22cal trap. Not really an indoor shooter, not to loud outside.

[linked image]

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(Login VWDan)
Crosman Forum Member

Wire Stock

February 11 2012, 6:24 AM 

Farmer, Here's a pic of a prototype I made a while back. It's solid but if you fell on it it would probably be damaged. It's made out of aluminum tubing which would bend. The adapter is machined from solid aluminum. I plan to make another adapter out of steel to compare with the aluminum. The threads should hold up well in steel although I haven't stripped any threads in the aluminum version.

[linked image]


''If everything seems under control, you're not going fast enough!'' Mario Andretti

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