See this is exactly what I'm talking about. Justin's gun is getting 18 shots with the 18 grain pellets that are a good 30 fps faster than mine for the same shot count and same pellet. I don't know if that's just the normal difference between two guns, or if mine's dumping air some place. I think at least for now, I'll just leave my gun the way it is.
William,As my rifle groups very nicely, I will probably leave the barrel alone and just not look too closely at it. I ordered the PA and spring from a challenger and installed it for awhile. I eventually removed it because I just couldn't get it to do what I wanted and somehow the threads eventually bound up on it. I did pick up a 10/32 allen head bolt, and have a few pop rivots if I decide to use the factory spring, (cut shorter), and a PA. Come to think of it, I think I have a spring from a Challenger and one from a 2260. I think I ordered the 2260 spring, but the Challenger PA came with a spring too. I have two lighter springs. The lighter of the two was silver and the other black. I tried installing the silver spring, but with the PA all the way in, it was shooting down around 500 fps. Couldn't hardly hear the gun go off, and the shot count was so high I didn't even bother running it down to 1,000 fps. Be a fun, strictly back yard gun, but not practical overall.
I almost hate to ask, as it just sounds like a road I shouldn't be headed down, but how does one mod a Disco to safely handle a 3,000 psi fill?
Quote from: Martis 1 on September 30, 2015, 01:23:23 AMI almost hate to ask, as it just sounds like a road I shouldn't be headed down, but how does one mod a Disco to safely handle a 3,000 psi fill?You change the 3 screws that hold the valve in-place which are 8-32 to 3 high tensile strength 10-32 screws, you have to remove the valve and have the screw hold drilled a little out and taped for the 10-32 ones. You may can buy a complete valve from Norm at Discos R US that is already setup for the 3k fill. The D.P.V. (Disco Power Valve) Valve is made for a 3000 PSI fill. http://discosrus.net/disco/Contact Norm and he should be able to take care of it if you want too fill higher, you can just modify your valve if you want! Best to let someone do it that is experienced! I tried and messed up a valve...The weakest point on a Disco is the 3 valve bode 8-32 screws, changing those to a bigger one increases the Safety margin a good bit. William
Quote from: William on September 30, 2015, 01:52:03 AMQuote from: Martis 1 on September 30, 2015, 01:23:23 AMI almost hate to ask, as it just sounds like a road I shouldn't be headed down, but how does one mod a Disco to safely handle a 3,000 psi fill?You change the 3 screws that hold the valve in-place which are 8-32 to 3 high tensile strength 10-32 screws, you have to remove the valve and have the screw hold drilled a little out and taped for the 10-32 ones. You may can buy a complete valve from Norm at Discos R US that is already setup for the 3k fill. The D.P.V. (Disco Power Valve) Valve is made for a 3000 PSI fill. http://discosrus.net/disco/Contact Norm and he should be able to take care of it if you want too fill higher, you can just modify your valve if you want! Best to let someone do it that is experienced! I tried and messed up a valve...The weakest point on a Disco is the 3 valve bode 8-32 screws, changing those to a bigger one increases the Safety margin a good bit. Williami was thinking of buying this but isn't $85 sort of expensive? I'm pretty sure the valve from crosman is $15 and the only modification he does as far as i can tell is retap it for bigger screws.