Once closed, the gas is then redirected out the back against the pistonhead which forces the slide backwards to begin the blowback cycle. Once the projectile leaves the chamber, a negative pressure exists within the cylinder, causing the floating valve to shut close from the pressure of the gas. I'm not sure how WA guns work - I'm not too familiar with them, but Hi-Capa floating valve springs force the valve OPEN to direct gas in to the barrel. :P My mistake for thinking the whole work is Magna BB If the spring is located on the BB side of the valve, then yes it should keep the valve open. I'm not entirely familiar with TM's design like I said, but I was going on the assumption that they used similar systems. If the FV spring was too strong it would simple close the valve and push the BB past the hop up causing a roll out. The BB pressing agasint my FV is what keeps the passage open. Typical velocity of a stock Marui GBB running propane is only 290-300fps.įor my gun the valve spring presses the valve closed. Personally, I would not be sweating over a 10-20fps variance - I'm actually surprised you even got up to 310fps with the stock gun. There are many variables that can affect this, such as storage temperature of your gas, volume of gas remaining in the tank, length of time between filling your mag and firing it, etc. Regarding the original post - a 10-20fps various with gas pistols is NOT uncommon. It doesn't push it closed - if it did, then your explanation holds water. The point of the spring is to keep the valve OPEN. In other words, the FV has SLOWER closing - NOT FASTER as you have indicated! The stiffer spring keeps the valve open for moment longer, thus, allowing a greater amount of gas to be ejected out of the barrel and behind the projectile before the valve closes. All of my measurements show otherwise, and this is the theory I've surmised on it: I'd like to hear your explanation as to why the floating valve spring will decrease the velocity. Magazine Valve Spring harder = Less Volume of gas released Recoil Spring Harder = no effect on FPS, more gas required to cockįV Spring Harder = Potentially faster closing of valve, less FPS, more blowback pressure Hammer Spring Harder = Higher volume of gas released The only spring that should increase FPS as it becomes stiffer is the hammer spring. The Spring in the floating valve (at least in WA, and I believe in TMs too) pushes the floating valve to close it after the BB is shot. Hi-Capa Magazine Parts Availability In stock (20).
#TM 4.3 HI CAPA GUADER OZZLE UPGRADE#
Having a harder floating valve spring will DECREASE the FPS. He is using high quality upgrade parts to get the best performance out of his Tokyo Marui Hi-Capa 5.1.
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