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Originally Posted by Shmavistime  Ive toyed around with the valve springs. I could get it up another 20fps but after that, it was too weak and caused the co2 to leak since the valve pin was stuck momenterily. The rubber band trick works okay, but its kind of hard to do, and pretty shady. You can try shimming the hammer, but its hard to keep a piece on the hammer without the force of the spring pushing it off at some point. |
Softer seal material can perhaps help a little with the leak with the weaker valve spring. Or you can simply use stronger hammer spring - it is surely question of his best combination.
Improvement of gas flow will be most likely very difficult in case of 3357.
...perhaps dry to make some sealing between barrel and cylinder for velocity increases trought some efficiency gain?