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PE Emek. PE Etha2. Remember me Log in. Lost your password? I don't remember what the stock spring on my 95 was like because I quickly upgraded to a Nelson kit, but I'm pretty sure it used the stock IVG. I don't believe the pre97's or 98's had the body threaded for the later huge set screw one piece ivg's. That's right, forgot about that, but it was over 10 years ago. I guess my Nelson kit did include the IVG. Wish I still had that old marker, but that's another topic. I still can't figure out the answer to the original question.
I'll try to take a picture when I get home to illustrate what I have encountered. So it sounds like it isn't too odd, that there are a lot of variables to take into account. It is a '99, and it has a standard screw-in IVG, but I have no idea what kind of hammer it has. Everything seems to be okay, I need to adjust my main reg again, but other than that it seems to be running perfectly.
The Maddman spring the blue one was a lot stronger than the old spring, my velocity went down from fps to below fps when I swapped back to the old spring. But it makes sense for the problem I was having - isn't that 'farting' noise a result of too strong of a hammer spring or too weak of a valve spring? Hate to disagree, but you got things a bit mixed up K.
The first cockers till the 98 model came with Sheridan style main springs, and an adjustable velocity collar as stock items. The big upgrade then was to go to Nelson springs, which were wider, could be tuned more easialy, and were no where near as stiff as the stock springs.
Because the stock hammer and adjuster were cut for narrower springs, they both needed to be replaced to use Nelson springs.
Thus, the items: hammer, springs, and adjusters were sold as complete kits most of the time. The big downfall to that setup is that it can unscrew as the gun is being used, slowly lowering the velocity. That's what gave us Rex kits. The Rex kit was a Nelson spring, hammer and adjuster kit from Belsales sold as an upgrade to the 'cocker.
Because of the design, it won't unscrew from the vibration of the gun. There were other models also, like the one from ANS that used a two prong adjuster, removing the need to take out the cocking rod to adjust the velocity. Because the whole system was very input pressure sensative, the gross velocity adjustments were made with the spring tension, then the velocity was fine tuned with the inline reg.
They also drilled the valve chamber deeper in the 98 and later bodies, requiring a longer valve spring.
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