after looking at all the postings on this site and others it seems that the canadian version has this volicity limiting valve reducing my fps.
to all of you guys that have the us version when you shoot do you get what sounds like one loud psst and one little psst per shot? if not is this the valve letting off the other 125fps over my 495fps?
now i have been looking at the diagrams does anyone know where this valve is located on the diagrams or what the part number is on the pic?

site and there is no decernable differenece with mine.

i have compared the two guns this is what i found
u.s 106-008 can/u.k 108-008
u.s 106-005 can/u.k 105-005
u.s 106a036 can/u.k 108b036
u.s 106a010 can/u.k 105a010
so it seems to be more than just the spring involved. so i think that if a person ordered the pieces sepertly i could get them into canada, but those pieces look pretty small could i do it myself???

It might be a double stager from the co2 to the valve. Liken a second chamber of some sort. When you say to his's it usualy means the first his is the co2 being fired, and the second hiss might mean that a limited compression chamber is re-filling its self after firing. You can rapid fire your gun right?

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Matt

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yes i can definetly rapid fire it i'm just trying to figure out exactly what all needs to be done to get it up to snuff fps wise myself without any gov people knowing.
i guess i'm going to have to spring next year to get it modifiyed. it has been around 5 above zero this week and all the little critters are getting hard to find.

so do you think all those parts i listed above need to be changed????

i have a canuck 1077 too, has this ever happened to your gun, i pierce a fresh co2, and shoot the first 3 or 4 shots they all come out like 2 or 3 shot burst?

is this normal?

thats kinda what mine is sounding like. but it only shoots one pellet right?? and i realy only notice two or three sounds. when i load up a fresh co2 and let the whole clip go fast it realy sounds kinda cool Matt typed it could be co2 filling but if no u.s guns do it i'm thinking that the can. version is letting out extra c02 so hears my thought
Why does the u.s get aprx.36 good shots and power at over 600fps and the can one the same at under 500fps where does the extra power go than????so by that thinking we should get 50 shots at full power than right????? i have a call into crosman canada to see if i can get the airsource kit and the parts i listed above were really getting riped off if were only geting 3/4 of a co2 and being under powered at the same time...

yep it only lets off one shot, but it sounds like its doin a 2 or 3 shot burst, i only get like 3 n a 1/2 clips out of a co2 b4 i notice a dip in the pellets.

i guess its no big deal, im gettin a slavia 631 soon so ill prob just bulk the 1077 n leave it at that. not unless u figure it out, im pretty paro bout opening up my 1077 honestly..

1077 or the valve out of one and I will check it out.

Hmmmm. This thread has now become a personal investigation mystery!

well i just got mine and am not done playing with it yet but these guns are pricey up here. canadian tire sells them for $124.99 and a few other places up to $150.
i sent out emails to some canadian sites asking about the parts and the airsource kit i am waiting for replies. i also talked to crosman canada today about the parts we need up here and she was no help and they have no airsource kits in either and does not know when they will come in she said try the u.s company to order it . you would think that crosman canada should be able to get stuff from the parent company????? right

Trev.357:

I believe I've seen a airsource 88gm at Walmart at Square One Mall. I never did ask about the price for I was stocking up on all the camping clearance (mad good deals if you're around! $15 CDN for a 8x21 Tasco + bonus free swiss army knife on clearance).

If you check around at different different Canadian Tires (Can. T) you can find a better pricing sometimes. I know I got my 1077 wood at the price of the normal black one. I think Can.T was charging $169 CDN for the woodstock so I was more then happy and lucky.

Each location normally has some clearence area and some managers special. Now to the best of my knowledge Can.T never loads co2 into thier 1077's on display. Pending which location you go to the customer traffic through a department can be more or less. Check the guns on the display. If they look not damaged then I'd grab the manager and buy the display model for the co2 1077's because Can.T does not load co2 into the gun and get the manager to work for a sugar cane sweet deal for buying htier demo off them.

Now I would not buy a demo if it was a breakbarrel gun because you can be sure that it's been dry fired like 20times a day x 7 days x 52 weeks, etc you get the picture and the seals are probably going to die when you take it home.


Glooko








..."In Glock we trust"

yeah our wal mart has the airsource c02 88grm but no adapter kits i asked the girl today and like every where else she will look into it . got to go duck hunting now chat with everyone in a couple of days.

springs and seals it would improve it right

i have never done airgun mods yet but have done powder guns. as you can see the part nunbers are so close to each other and with all the help from people on this forum we don't think there is anything else in there but the diff part numbers
i'm going to try to order them right from crosman usa a couple at a time as so not to look like what i'm doing.
i have not taken mine apart yet it is going to be a winter project .im doing this to my 1077 and 2240.the co2 guns are no good here in sask in the winter so i can take them apart for a while and have a good look at them take some measurements and some pics and post them on this site

hey ill sell my canadian 1077.
it was bought this year in april/may 2003.
i bought it used like a month and a half ago.

yeah how much?

$80 Canadian?

Does the Canadian 1077 have a verry hard trigger? If it doesn't I can almost bet that the hammer spring is a really light hammer spring. Taht double psssst you were talking about almost sounds like my paintball gun when it has a verry soft hammer spring in it. Some one check for me please!

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Matt

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actually its not too bad, ive shot the 357 b4 and it seems to have a harder trigger pull.
1077s trigger aint so bad to me.

than it just might be a lighter hammer spring. Ok someone with a canadian version of the 1077 want to expieriment?

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Matt

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drilled out the opening that the c02 has to go through to get inside the vavle. Ièm talking about the part where the brass line attaches the the vavle itself

You can try but I dont think it will help much. You will more than liekly have a big mess on your hands.

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Matt

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know for a fact what i can do to increase my fps

Yes I do.

If you have the canadian version get the american valve. if you have the us version well.

Longer barrel will get you higher fps. Pack grease around the valve pin this wil reduce the vibration allowing the valve pin to fall in the valve further. I think Travis said something about having a friend that did a mod to the valve and made it shoot 900 fps. You can also add a bulk system this will make the higher fps more constant. Kepp your gun clean and lead free. Buy a .17 barrel brush to clean all the lead out of the barrel This way there is less friction beetween the barrel and the pellet. You can also get a strogner hammer spring. If you do that though your trigger pull is going to suck like hell thats for sure. As far as anyhting else goes I am not usre.

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Matt

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i can't say for sure but we mostly agree that it is the springs like when you looked at my early post with the different part numbers on the diagrames those are springs and o seals it has to be those things becouse they are very simple parts to interchange from u.s to can guns on what ever day crosman is building them and crosman would have to keep it simple to make it cost efective on thier part. every one is goingto have to wait until it gets cold again before i rip mine apart
jay have you found and looked at the different diagrames if not i can email them to you?????

and i canèt see the o-rings making much difference. i took my vavle apart and i think the difference is the opening letting the c02 into the vavle itself. since i canèt get a U.s. vavle i want to know if drilling out the hole would increase or decrease the fps. also i really want to know other things i can do to increase the fps besides the barrel and hammer spring because the are identical to the u.s. versions. wouldnèt a bigger opening mean more c02 flow and the faster the pellet will go, because the psi stays the same even if you make the opening bigger. i can do almost any mod i want to my gun i just need to know what i can do to the vavle.

I would imagine it would increase the fps. But I wouldn't try to do it with out a spare valve lying around the house somewhere. I talked to crosman. An american valve is 14.50 plus 7.00 for shipping and handeling.

could it be just a bleed hole in the canuck vavle?
i know that most of the pumps 13xx.. crosman guns r reduced cuz of the valve..

In the land of the blind, the one eyed man is king.
In other words, work with what you legally can in the most powerful capacity.

we need to get some pictures and some actual visual comparasons not the drawings. jay if your ready to start ripping it apart(i'm not still too many snakes in the yard) get some pictures of the valve and send them to Matt before you start cutting. like the one site i found stated that it was just a reducing valve in the gun. that is why i started this topic but than people did not think there was one in it. so it is a good thing that it is hunting season or i would be going nuts with my air mods .but i do belive that it has to do with the valve after looking into my 2240 mods if we can all figure this out it is going to help alot of people

and post some pics of the parts, but how do i do that because there will be quite a few

i think the close up pictures of the springs and the valve i have been going over the bbs forum there is over 680 pages of posts so it is taking me a while too look at but there is a few post with differnt co2 guns with let off holes drilled in. the 1077 might have those too,people have been filling them with epoxy maybe this is for us too