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Non Ported Piston Heads


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#1 WiN&LeGeNd

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Posted 26 December 2008 - 07:08 PM

This is not terribly important as it has been mostly covered in a previous post, but reading through it I did not see the conclusion to be drawn by any one. So I thought I might add it in.

The post was, as my title describes the piston head. KWA does not port their piston head, but as to why other than validation through testing was not clearly stated. I did come up with a simple theory on this. If the piston in port then almost all of the air pressure on the O-ring will be centered directly in side the piston head pushing outward, this pressure no doubt will increase the frictional forces on the piston head. Now when the piston is not ported the pressure is redistributed on the o-ring in a way such that it pushes it out and to the back of the piston, resulting in less friction from pressure, yet a sufficient enough seal to hold the air in. This would result in the spring being able to move the piston at a greater velocity, thus resulting in quicker compression and movement of the air through the barrel at a higher velocity as well. I just thought that might be interesting to know and a good reason to NOT mess with the stock piston head if your still thinking about it.

Again I know its not terribly important, but more or less just a useful theory to have handy if anyone were to ask.

#2 Guest_Radix_*

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Posted 26 December 2008 - 09:53 PM

View PostWiN&LeGeNd, on Dec 26 2008, 07:08 PM, said:

Again I know its not terribly important, ....

Every post in this forum is important to us.  laboratory tests can only validate data but cannot prove products, it's only through field tests and feedbacks from our customers can we improve our products.  We sincerely welcome your questions and theories. :)

Back to your theory .....  check the design of the air nozzle.;)

#3 vic_man4

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Posted 27 December 2008 - 07:20 PM

View PostRadix, on Dec 26 2008, 10:53 PM, said:

Every post in this forum is important to us.  laboratory tests can only validate data but cannot prove products, it's only through field tests and feedbacks from our customers can we improve our products.  We sincerely welcome your questions and theories. :)

Back to your theory .....  check the design of the air nozzle.;)
I've got my a TM hopup unit and a SRC air nozzle with O ring. Would you suggest that I just sand down the notch on the air nozzle instead of replacing it? I keep reading this balance thing, sounds important. Kinda like ying yang stuff dont disturbe the karma of the gun :lol:

#4 Guest_Radix_*

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Posted 27 December 2008 - 07:53 PM

View Postvic_man4, on Dec 27 2008, 07:20 PM, said:

I've got my a TM hopup unit and a SRC air nozzle with O ring. Would you suggest that I just sand down the notch on the air nozzle instead of replacing it? I keep reading this balance thing, sounds important. Kinda like ying yang stuff dont disturbe the karma of the gun :lol:

What are you trying to achieve with those parts?

#5 vic_man4

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Posted 28 December 2008 - 06:30 AM

View PostRadix, on Dec 27 2008, 07:53 PM, said:

What are you trying to achieve with those parts?

Compatibility with most aftermarket buckings and TBB's.

#6 WiN&LeGeNd

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Posted 30 December 2008 - 12:36 PM

View Postvic_man4, on Dec 28 2008, 09:30 AM, said:

Compatibility with most aftermarket buckings and TBB's.

If possible find an after market nozzle with the notched design. If not, you could try to sand it down, if that does not work then you will have to go ahead and use the after market nozzle, but you will most likely see a drop in muzzle velocity, how much I don't know, if its only a small amount it could be regained easily, if its large drop you may be better off with stock parts.

I would suggest the stock bucking with an H-Nub http://airsoftoutlet...AEG-Hop-Up.html , and TB barrel with .25 or .3g KSC bb's, I doubt you would be able to top that setup tuned, clean and broken in. It seems like too many people dismiss the stock setup as not worth while, when in reality it often can be easily as good or even better than after market parts that have essentially the same design. Any KWA engineers want to back me up on that?

Edited by WiN&LeGeNd, 30 December 2008 - 12:44 PM.


#7 vic_man4

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Posted 30 December 2008 - 05:14 PM

View PostWiN&LeGeNd, on Dec 30 2008, 01:36 PM, said:

If possible find an after market nozzle with the notched design. If not, you could try to sand it down, if that does not work then you will have to go ahead and use the after market nozzle, but you will most likely see a drop in muzzle velocity, how much I don't know, if its only a small amount it could be regained easily, if its large drop you may be better off with stock parts.

I would suggest the stock bucking with an H-Nub http://airsoftoutlet...AEG-Hop-Up.html , and TB barrel with .25 or .3g KSC bb's, I doubt you would be able to top that setup tuned, clean and broken in. It seems like too many people dismiss the stock setup as not worth while, when in reality it often can be easily as good or even better than after market parts that have essentially the same design. Any KWA engineers want to back me up on that?
I already have my entire set up almsot complete for internals, I just need to assemble. Im getting a FireFly, stock nub (unless I get around to getting a H nub), TM hopup unit, SRC airnozzle with O ring, prommy TBB.

I just wanted to know if it would be better to install the SRC airnozzle or sand down the ledge thing on the stock nozzle.

One suggestion, KWA should make a airnozzle that works "as a unit" with other KWA internals but without that ledge thing, just a suggestion.

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Posted 30 December 2008 - 06:38 PM

View Postvic_man4, on Dec 30 2008, 05:14 PM, said:

One suggestion, KWA should make a airnozzle that works "as a unit" with other KWA internals but without that ledge thing, just a suggestion.

The ridge is for alignment with the hop-up unit.  Remove it and you may loose consistency. ;)




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