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KWA's aluminum piston head!


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#1 SuperSanta911

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Posted 29 November 2008 - 09:58 PM

i was wondering if the aluminum piston head had any cases or often cracked the V2 gearbox on the KWA.

I was also wondering if i should replace it seeing as im playing in a cold weather enviroment (40degrees)

If i was to replace it, would anything else need to be replaced along with it?

any help would be appreciated.


thanks.

#2 Guest_Radix_*

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Posted 30 November 2008 - 09:28 AM

The KWA aluminum piston head and the polymer cylinder head work well together. They were designed to minimize impact but yet produce maximum performance.  Changing out the piston head will upset the balance and may not guarantee a better result. :)

#3 hawkeyes39

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Posted 04 December 2008 - 04:46 PM

I'd go ahead and replace it if you're going to be playing a lot of cold-weather games, and you might as well reshim while you're at it.

#4 karMeister

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Posted 04 December 2008 - 07:33 PM

View Posthawkeyes39, on Dec 4 2008, 04:46 PM, said:

I'd go ahead and replace it if you're going to be playing a lot of cold-weather games, and you might as well reshim while you're at it.

Nah like radix said the Cylinder head will take the pressure from the Piston Heads impact.

Last time I checked my KWA doesnt need any shims. :lol:

#5 Stealthmaster14

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Posted 04 December 2008 - 09:19 PM

In my experience, as gears  and such wear, the shimming changes.  Don't try to shim it if it doesn't need it, but it might be a good idea to have some shims handy just in case.

#6 Guest_allizard_*

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Posted 05 December 2008 - 09:48 AM

View PostkarMeister, on Dec 4 2008, 07:33 PM, said:

Nah like radix said the Cylinder head will take the pressure from the Piston Heads impact.

Last time I checked my KWA doesnt need any shims. :lol:

No shims need even after 120,000 rounds!!  That's amazing.

FYI, the Impact Absorbing padding in our cylinder head is over 3mm thick.  I haven't seen anything thicker than ours.  Not even those rubber on Systema Area 1000 cylinder head.   This is why they are design for our aluminum piston head.

#7 Stealthmaster14

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Posted 05 December 2008 - 10:02 AM

View Postallizard, on Dec 5 2008, 10:48 AM, said:

No shims need even after 120,000 rounds!!  That's amazing.

FYI, the Impact Absorbing padding in our cylinder head is over 3mm thick.  I haven't seen anything thicker than ours.  Not even those rubber on Systema Area 1000 cylinder head.   This is why they are design for our aluminum piston head.

That is insane.  What about those Sorbo pads I hear about?  Are those thicker than yours, or do you guys already use those? ha ha

#8 karMeister

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Posted 05 December 2008 - 12:43 PM

View PostStealthmaster14, on Dec 5 2008, 10:02 AM, said:

That is insane.  What about those Sorbo pads I hear about?  Are those thicker than yours, or do you guys already use those? ha ha


Yeps no shims! theoretically because of the bearing type bushings that minimize friction.

Sorbos are the kinds of rubber found in those blue aftermarket soles... I have always stuck to s plastic cylinderhead especially with high ROF/FPS setups!  ;)

#9 Black Bullet

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Posted 11 December 2008 - 08:58 PM

So the aluminum piston head may be better, but why isn't it ported?

#10 Guest_Radix_*

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Posted 11 December 2008 - 09:13 PM

View PostBlack Bullet, on Dec 11 2008, 08:58 PM, said:

So the aluminum piston head may be better, but why isn't it ported?

Why does it need to be ported? ;)

#11 Black Bullet

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Posted 11 December 2008 - 09:31 PM

Well i've heard that it expands the O ring out which creates a better seal.

#12 karMeister

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Posted 11 December 2008 - 10:59 PM

View PostBlack Bullet, on Dec 11 2008, 09:31 PM, said:

Well i've heard that it expands the O ring out which creates a better seal.

Yeah. I guess a ported alu piston head will theoretically work better. Jst take it apart and try pushing the piston (with th head and oring intalled) while you block th nozzle... you can start from there   :lol:

#13 Guest_Radix_*

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Posted 12 December 2008 - 06:00 AM

View PostBlack Bullet, on Dec 11 2008, 09:31 PM, said:

Well i've heard that it expands the O ring out which creates a better seal.

Contrary to popular believe, a ported piston is not always better.  In the case of a KWA AEG, a ported piston installed with stock components will not guarantee a better seal or produce measurable performance gains.  This is because every component in the KWA gear box is engineered to work as a system and not as individuals.  Simply changing out one component for another may upset the balance of the system. :)

#14 Black Bullet

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Posted 12 December 2008 - 07:35 AM

So did you test it with the ports?

#15 Guest_Radix_*

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Posted 12 December 2008 - 08:48 AM

Yes, we've tested it.  Because KWA also manufactures precision parts for the automotive industry, we (airsoft division) have access to a full staff of engineers and a very well equipped testing lab. :)

#16 hammer

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Posted 12 December 2008 - 08:54 AM

View PostRadix, on Dec 12 2008, 08:48 AM, said:

Yes, we've tested it.  Because KWA also manufactures precision parts for the automotive industry, we (airsoft division) have access to a full staff of engineers and a very well equipped testing lab. :)

automotive industry, sounds reassuring hehe now I want to get another KWA, now I'm wonering what AEG lineup we have in store for 2009 :)

#17 karMeister

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Posted 12 December 2008 - 10:14 AM

View PostRadix, on Dec 12 2008, 06:00 AM, said:

Contrary to popular believe, a ported piston is not always better.  In the case of a KWA AEG, a ported piston installed with stock components will not guarantee a better seal or produce measurable performance gains.  This is because every component in the KWA gear box is engineered to work as a system and not as individuals.  Simply changing out one component for another may upset the balance of the system. :)


I was honestly thinking of replacing it with a ported duracon piston head but I slept over it thinking that it does the job its supposed to do. WIll prob try a ported head just for the heck of it. You have a very good point there Radix  thanks :lol:

#18 Guest_Radix_*

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Posted 12 December 2008 - 10:58 AM

View PostkarMeister, on Dec 12 2008, 10:14 AM, said:

I was honestly thinking of replacing it with a ported duracon piston head but I slept over it thinking that it does the job its supposed to do. WIll prob try a ported head just for the heck of it. You have a very good point there Radix  thanks :lol:

There are two schools of thought in KWA.  Some (airsmiths) feel a ported piston is necessary and the other (engineers) doesn't.  We settled it by conducting several experiments and had them verified at the lab.  The results goes against all we knew about airsoft mechanics.:blink:

#19 whiterabbit05

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Posted 12 December 2008 - 01:10 PM

View PostRadix, on Dec 12 2008, 10:48 AM, said:

Yes, we've tested it.  Because KWA also manufactures precision parts for the automotive industry, we (airsoft division) have access to a full staff of engineers and a very well equipped testing lab. :)

Interesting, what kind of automotive parts?

#20 Guest_Radix_*

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Posted 12 December 2008 - 02:02 PM

Various components depending on make and model, from specialized housings to interior trims. :)




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