Air Gun Home :: View topic - The Canadian 2289 Crosman could have built, EH?

rsterne · Moderator

Like many others, I am frustrated by the crappy way Crosman detuned the 2289 for the Canadian market.... A stock gun only gets about 365 fps in 10 pumps and peaks out before 450 fps no matter how many times you pump it.... Rolling Eyes

.... We all know that a Flat-Topped Piston and Valve and plugging the bleed hole is the way to get the gun back to the way it should have been built.... the problem is that by doing that, you have the potential to have the velocity well over the 500 fps limit for non-PAL guns if you pump it a lot.... Shocked

While I was playing with one of my velocity adjusters on a 2289 that was stock except for the above two mods, I found that the adjustment range was over 130fps for the point at which the gun began retaining air.... The stock spring tension gave me 497 fps in 9 pumps.... but I could dial the tension down so that the gun peaked at about 470 fps.... This gave me the idea to try the gun with a 2240 spring, and I quickly found that it peaked at 500 fps right around "stock" spring tension.... I took out the velocity adjuster, and put the 2240 hammer spring in using the stock rear plug / spring seat.... Here are the results:

You can see that you can never get the gun to shoot over 500 fps.... It gets to 489 fps in 9 pumps (hardly any change from the stock spring).... but at 10 pumps it is retaining air and producing a 2nd shot.... The velocity on the first shot starts coming down while the 2nd shot gets stronger, until it peaks at 17 pumps (again just under 500 fps) and you start getting a third shot.... This process repeats, with the first shot getting weaker, the second shot hitting a plateau and eventually decreasing.... and the third shot getting stronger until it also plateaus at just under 500 fps.... By that time, the first shot is dropping fast, and it is so quiet you can tell that you are approaching valve lock.... so I didn't test any further.... Wink

In case you are interested in how consistent the velocity is at 9 pumps, I ran a shot string using JSB Express 14.3 gr. pellets with the following results:

490
487
488
488
486
487
494
488
491
490

Range: 486 to 494; Spread 7.9 fps; Deviation 2.0.... 8)

I know that every gun is an individual, and if you did these exact same mods you might be just over 500 fps or down at about 470 fps.... but it looks to me like it would have been a pretty simple thing for Crosman to build a Canadian 2289 that would stay under 500 fps and yet reach that in just 8-10 pumps.... I didn't play with a smaller valve volume, hammer weight, or valve spring.... but if such a simple change (from a 2289 hammer spring to a 2240 spring) could keep a F-T-P equipped 2289 "legal".... think what Crosman could have done if they had bothered.... Rolling Eyes

Since we all know that's not going to happen.... at least now you have the information on how to keep that F-T-P / plugged bleed 2289 non-PAL.... A 2240 hammer spring, a couple washers for a shim, or clip a coil if necessary.... and you can make sure your gun stays under 500 fps.... just what the Government ordered, EH?.... Twisted Evil

Bob

AirGunEric · Site Admin

That is VERY consistent for a pumper- any pumper, I'd say.

I guess the answer as to "why" this wasn't done from the factory comes down to time- it takes all of 2 seconds to drill a hole through a valve, the other changes need some actual engineering and thought to complete.

As I discovered recently through my dealings with Crosman- Really it is Canadian Tire, and to a lesser extent, WalMart that push Crosman to make ANY 'detuned' guns for Canada. Sounds a bit odd, but if the Big Box guys commit to a thousand pieces for the year, Crosman will detune anything. But- that being said, they won't take the risk on their own and come up with a re-engineered product just for countries needing de-tuned equipment.

And, for anyone in Canada who's noticed lately, Cantire is liquidating the 2289s and 2240s and replacing them with more Beeman product and only a couple models of Crosman. Seeing as how Crosman was the only big box carrying the 2289, it may end up going the way of the do-do. Possibly the same thing for the Phantom as WalMart seems to be unloading almost all Crosman product and I don't see alot of stock replenishment going on.

Anyways, back to the topic- nice work on that, Bob. For people in Canada without their firearms license that is some very useful information!