Post by fuzzywolly on May 17, 2011 21:01:04 GMT -5
Small update, I was able to get my new chamber and noticed a few things worth noting.
1. You do not need to cut your AEG nubbin. The space where the nubbin goes has plenty of room for even a PDI nubbin. Therefore, you do not need to cut your nubbin, especially your typical nubbin (shorter in length).
2. Make sure to use the old hop up adjustment piece/screw from your stock chamber. And put this on across the barrel before attaching the chamber. Otherwise, if you forget to do this first, you will have to the chamber off and put the adjustment piece on. I forgot not once but twice..But once I remembered I had no other problems.
I had some pictures but am having trouble finding them. Will post some pics up soon so that you guys can see what it looks like. Pictures on the internet are scarce.
Was able to get some test shots off today, getting ready for LP. Today was my first time of being able to seriously analyze the chamber and the shooting results. Some things I noticed:
1. With my rifle and a sp130 spring, she comes in shooting a good 400 fps. The HP chamber, unlike its competitor, the PDI chamber, cannot provide as much "lift" (hop). The HP chamber cannot carry the .4s like my PDI chamber was able to. The HP gets me about 120 feet with .4s. The PDI gives me a good 200. Now granted, this is a 400 fps set up, so I am more impressed with the PDI chamber than I am disappointed in the HP. In fact, with a new spring on the way (put me at about 500 fps), carrying .4s should be no problem.
2. You can only adjust so much. Similar to the PDI, only you can have some major problems with the HP if you adjust for more hop too far. Today, I really turned the hop up, and this lead to a automatic jam. The nubbin was pressed too far down and the bb was basically blocked by it. Its something to be careful about. Adjusting the arm too much can lead to some jamming problems. Was an easy fix though. I turned the hop up off, and simply put the jamming rod down the end of the barrel and poked the bb right out.
3. As you adjust the arm for more hop, the ring tightens down. This keeps it in place nice and secure. However, if you loosen the arm, for less hop, the ring becomes loose and flimsy. Now who on earth wants a flimsy arm. Say you are using .28s with a 450 fps set up. Having the arm positioned for less hop is something that would be necessary. But with the arm flimsy, this can lead to some rather inconsistent results. So I thought to myself, what can I do to make this chamber more effective?
Below is what I came up with. But first, lets see some pics of the problem at hand.
^Above is the ring in tight. Looks good.
^Different angles, but arm still looks good, nice and tight. But what happens when you loosen the arm for less hop?? Find out below.
^Notice the screw, how it is coming out. This is what happens when you turn for less hop. Looks like the arm is wiggling around. Not something you want at all.
^Good golly, now look at it. Rubber band? Foreshadowing? Maybe?
So now, to fix this, I realized...
1. I need to keep the arm from being able to wiggle around without effecting how the arm turns for more or less hop. I cannot have my arm get stuck on my "mod" and prevent more or less hop from occurring when I adjust the screw.
2. Cannot have too big of a mod, so that the outer barrel does not get caught on the chamber.
So I used the following...
-Rubber band -Electric tape
My goal was to wrap the band around, with tape over the top, and around the area where the screw goes through the ring (screw used to adjust hop up). This would prevent any of the errors listed above from occurring. Here is my mod.
Its the first draft. Let me know what you think. I am up for ideas, criticism, etc. I simply am coming up with my own mods here, as no one has bothered posting up any guides for this HP chamber. Its a stab in the dark, a walk in the woods with a bear, etc. So any help is appreciated.
See this is the sort of thing I love to see in airsoft. Real performance mods, like under the hood DIY solutions. What you've got there is pretty sweet. I can't think of a reason why it wouldn't work. The only problem I foresee is that MAYBE the E-Tape will cause it to sit too far back in the barrel and be a bitch to put back together. Have you put it into the gun yet?
Have not been able to put it back together in the gun yet, as I am waiting for a new magazine catch screw. The old one stripped big time, and a friend is cutting me a new one.
By the E-tape sitting too far back in the barrel, what do you mean? Are you referring to the hole where you use the allen wrench to adjust the hop up? Perhaps you think the tape will get in the way/block it?
Another member used a similar method with very good results. His mod used a old UTG barrel spacer, and said it worked great. Hoping for similar results. Thanks for the input Ghast, let me know what you were referring to, and I will look into it.
I am thinking that it will not get in the way. It is only a small bit of tape wrapped around the chamber, so I believe it should be good to go. However, there is a chance of what you said happening, so I will have to test that out shortly.
Also, hop up arm that came with the chamber blowsssss. The piece where the nubbin sits is misaligned. I had to sand it down to make it even. Will post some shooting results when I get the mag screw back.
Fuzzy, me and you chatted last month about us both having issues w/ our PDI Chambers, I understand this is a tad offtopic, but the main reason you have this is because your PDI has been sucking. I have another PDI w/ high arms coming, I'll see it was just our chambers or not. On topic: Did you ever get this chamber to work with your rifle?
PDI, the last one *was* faulty, the screw wholes were out of place, I never got the proper Hop-up screw, so it'd move the hop-up back and fourth when shot. and one of the holes to keep the barrel in place didn't go all the way through, on the RIGHT side. I wonder why my shots weren't flying straight? I have nothing else to say
Post by fuzzywolly on Jun 10, 2011 10:10:50 GMT -5
O, so you were referring to your new PDI chamber versus your old one. Interesting..Hope your new one works better, sounds similar to the problem I had, although another member is testing it to see if it is an issue with the actual chamber.
As for the HP one, I am worried that I will not be getting enough hop from the bbs, until a new spring arrives, which I have yet to order. But hopefully I will get some straighter shots as I had to grind part of the arm, as it was extremely slanted to the one side. Poor quality control by HP's part. This hop up has some problems.