Thanks RKR , Ive got the material for the lever bracket sitting on the bench at home already. I will probably turn down the poppet or make a new peek valve . Centering the valve spring I had forgotten about thanks for the reminder. Manny do you know what the OD of the existing shroud is on theWinchester?
Quote from: Hobbyman2007 on August 16, 2018, 08:42:57 AMThanks RKR , I’ve got the material for the lever bracket sitting on the bench at home already. I will probably turn down the poppet or make a new peek valve . Centering the valve spring I had forgotten about thanks for the reminder. Manny do you know what the OD of the existing shroud is on theWinchester? Peek tends to leak below 140 bar, for a 200bar gun I would use PET-P/Ertalyte. The poppet has metal casing so it's better to make a new poppet or a new seal that extrudes a bit for the valve. Of course while you are at it I'd make a new stem also, I've seen a couple of mushroomed Evanix valve stems - they get stuck and you'll get a reservoir dump when shooting.
Thanks RKR , I’ve got the material for the lever bracket sitting on the bench at home already. I will probably turn down the poppet or make a new peek valve . Centering the valve spring I had forgotten about thanks for the reminder. Manny do you know what the OD of the existing shroud is on theWinchester?
No problem sealing with peek valve when it is correctly machined. Dont make the contact point too wide and it will hold just fine at about 50bar. Drill rod is good material for the stem, no need for heat treatment if you go with hss rod. Marko
Evanix .357 uses non backvented 25mm shroud, a cosmetic thing. Air space around the barrel is very limited so there's not much point in backventing it. If you want it quiet make a reflex type 2" LDC for the gun.