Quote:
Originally Posted by simo1000rr
ok so I went down the shop and I use their chrono just to get an idea on what kind of fps im getting . I ran 2 tests the first one with the original plastic nozzle then I swapped the nozzle with the RA tech Aluminum one
the temp outside is 45 Ce degree which is 113 fehrnhite
first test: (plastic nozzle)
370
385
360
335
362
345
373
363
349
second test ( aluminum nozzle ) adjusted to almost fully open on higher fps
436
414
429
no measurement
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( no measurement the chrono don't measure anything and the BB just rolls out the barrel at no speed just the weight of the BB like if its free falling, few times 2 BBs would roll out the gun barrel )
when I was saying previously the the gun spits the BBs with the aluminum nozzle installed I meant the it comes out with no force or speed just rolling out the gun with its own weight plus a small amount of force from the shake of the gun but not from the gas force.
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Ok maybe its time for me to chime in. First off, your FPS for your plastic nozzle has too much variance, your shot to shot FPS should not deviate that much. The FPS should gradually go down, but for yours, it seems like its everywhere.
In terms of the aluminum nozzles, I have had nothing but issues. First off, the FPS deviates a lot with the built-in NPAS, and the valve spring is supposed to rectify this issue by streamlining the FPS, but imo, its still not as good as the stock plastic nozzle. Second, the blowback is weaker with the aluminum nozzle probably because the nozzle window doesn't mate well with the gas route (Ive narrowed it down to this since Ive replaced the oring at the rear of the nozzle to ensure that it has good air seal with the bolt). The third drawback relates to what you have discussed regarding the nozzle sticking into the hop up chamber. IMO, you want a nozzle that slightly sticks into the chamber as opposed to one that immediately displaces when the bolt travels backwards. The reason is this: if the nozzle moves backward as soon as the bolt cycles, the nozzle window immediately misaligns with the gas route of the magazine causing gas to be wasted. You want a nozzle that can stick intermittently to the hop up chamber so that the nozzle window remains aligned with the gas route until the fire pin is allowed to pull back.
Your issue in turns of bb's dropping out could be a result of the loading arm on the nozzle being a tad longer than the stock, and as such, pushes the bb out of the chamber. In general, I do not advise using the aluminum nozzle as it is a waste of money.
Stick with the stock nozzle.