Piston upgrade choices?

[ginnz]

Hey guys,

i have some newb questions regarding piston upgrades..... im upgrading my JG M4 SIR, as ive stated earlier in other posts, this gun is used for backyard target practice, and general plinking, it has NEVER been aimed at a human, and is NOT for gaming at all, so, with that out of the way.....

im looking at ordering a bunch of parts from AirsoftParts.ca, and have in my shopping cart, these items:

* 1ea.- Mad Bull 6.03mm Tightbore Barrel - 363mm
* 1ea.- Mad Bull 60 Degree Shark Bucking Hop-Up Rubber Set
* 1ea.- Modify Air Seal Nozzle - M4/M16A2
* 1ea.- Modify S150 AEG Upgrade Spring
* 1ea.- Modify Bearing Spring Guide - V2
* 1ea.- Modify Aluminum Bearing Piston Head
* 1ea.- Modify Ultra Piston - New Version

Now, as i have the (Modify Ultra Piston) and (Modify Aluminum Bearing Piston Head) chosen, im wondering if i should get the (MASK Sorbo Piston Head with Bearing - New Version) instead of the (Modify Aluminum Bearing Piston Head), as the MASK one has a built in "Sorbo Pad"?

would the Mask one fit the Modify Ultra Piston, and be a better choice for this build?

thats pretty much the only thing im confused on at this point, as there are soooo many different things a guy can get, and mix and match.

im gonna stuff all this stuff in the stock JG v2 mechbox (2008 model)

- thanks for reading, and any help is appeciated.

ginnz.

[dpvu]

Get the sorbo piston. I just had that same mechbox crack in the front on me yesterday with the stock spring so you definitely want to minimize impact on the mechbox.

[Styrak]

Don't plan on that V2 mechbox lasting long with that spring.

[m102404]

Yikes...that'll shoot stiff!

You might want to consider the MASK Sorbo piston head AND MASK Sorbo cylinder head...for dual bumperage. You will need to remove the 2nd tooth of the piston...but it's easy to do and there's lots of pictures on the 'net of what it looks like.

Pretty much any piston head will fit any piston body....but when you mix/match too many brands you might end up with a situation where the total piston/head length is either too short or too long. This causes the angle of engagement (AOE) to get out whack. Lots of posts already on that too.

Don't expect your mechbox to last long at that power level...but it'll be interesting to see how long it'll last on a M150 spring and sorbo pad. I plan on testing that same thing later on this summer.

Tys

[Gravewolf]

Do not ever use an aluminum piston head on a jg V2 gearbox because it will break! Just use a polycarb head and add a sorbo pad if your aiming for an fps higher than 400. If you are not gaming then the stock v2 gearbox will do the job if you wanna just do plinking. If you wanna go plinking then go for the accuracy upgrades like tight barrel and hop-up, in our country we only do fps upgrades as anti-zombie counter measures.

[ginnz]

ok,

so maybe the "Modify High Speed Ultra Piston, new version" would be a better piston choice, as the second tooth on it has been removed already?

should i get this piston, along with the (MASK Sorbo Piston Head with Bearing - New Version),and (MASK Pro Cylinder Head V2)?

then i would have a new piston, with the second tooth removed, and "Sorbo pad piston head", AND "Sorbo pad pro cylinder head"..... maybe this would be a decent choice?

and as far as the reliability of the finished system, well, if anything breaks, ill learn more about this stuff, and ill just upgrade what i need to from there.....

initially guys told me that my gun prolly wouldnt last with the stock setup running a 2100 mAh 11.1 30C lipo, and ive got 8000 bb's through it at this point, and its still going strong, with no problems what so ever ;-)

at first i was looking for an M140 spring, but there out of stock, so i figured "what the heck", ill try the M150......

so if you guys think the sorbo cylinder head/piston head/Modify High Speed Ultra Piston, new version(tooth removed), is a decent starting point, i'll place the order today....

thanks guys, and ill keep you updated on the progress of this build. :-)

ginnz.

[Gravewolf]

You should also consider the temperature. Any gearbox will fail when using stronger springs especially on winter.

[Cushak]

For the M150, I'd be surprised if a stock setup could pull that, even with that lipo - make sure you have a fuse. Admittedly I'm not as knowledgable when it comes to just how far you can push systems with powerful batteries.

You'll most likely need toque-up gears; the modify ones are pretty good, but if you've got the money order a set of Prometheus double torque gears. I've by know means baby'd mine and after a full season and a half there's no signs of wear at all.

Definitely get the MASK set as others have recommended, but I recommend a gaurder clear for hop-ups. (Although if you're determined to go for a 500fps + gun for with a Prometheus RED) While I've never used madbull hopups yet, I remember reading negative reviews about them in the past - things could have changed though.

Start shopping for a new mechbox now though; if you intend on going 500+.

[ginnz]

well, maybe i should just look for the M140 spring..... i was actually looking for that one, but AirsoftParts.ca has them "out of stock", and i really wanted to order all my stuff in one shot, from one place.

but screw it, ill order a M140 from somewhere else.

that said, im placing my order, minus the M150, and i'll go from there, and im taking your advise on the Hop-Up rubber, i didnt know the MadBull hop up had issues, so its no big deal to get something else, thanks for the heads up on that!

[ujiro]

http://www.airsoftparts.ca/store2/in...oducts_id=1377

Anybody heard anything about this piston? I'm thinking of trying it out. Only issue is the full metal tooth, so I couldn't shave the second one down (second from the back, that is).

[m102404]

I've seen them in person...very nicely machined. Very bling

They're still heavier than a poly piston...but not by much.

The rack seemed securely held by the body. On some setups you might not have to remove the whole tooth...maybe just a bit of the tip? (but probably alot of it for a sorbo setup)

I think that there was one post on here about someone's setup binding with one...but haven't heard much else otherwise.

Tys

[damage]

Originally Posted by ginnz

* 1ea.- Mad Bull 6.03mm Tightbore Barrel - 363mm
* 1ea.- Modify Air Seal Nozzle - M4/M16A2
* 1ea.- Modify S150 AEG Upgrade Spring
* 1ea.- Modify Bearing Spring Guide - V2

This are the additional parts that you need. Now once you get all the parts bring it to gundoc to set it up for you. To the country I came from where airsoft fps is "super hot" shimming the gears is the key. If shimming is not done right everything fails.

Infinite Torque up gears
Half Tooth piston
Prometheus Red hard hop up sleeve
MASK Pro Cylinder Head V2
MASK Sorbo Piston Head with Bearing
*Systema Magnum Motor*

Cheers,

[ginnz]

very nice... good info, thanks guys. this is gonna be a bit of a learning experience, i can tell.

my next project which is on its way new (JG m5j SD) and a JG navy metal body mp5, im gonna combine the two, as the( navy one doesnt work).... i also aquires a full rear stock, as thats what i wanted on the mp5.

im thinking of just buying a pre built systema gear box and work off that....

but im gonna finish this one off first.:-) 50% is ordered ;-)

[miowpro]

m102404: do you really have to remove the 2nd teeth when using sorbo pads cylinder head with sorbo piston head? where can i find photos of this done...

what about if your just using the sorbo pads on the cylinder head?

I have just done my first upgrade on my Star M4 SIR-M and im really not happy with the sound of my gearbox v2.

i want to get it sounding really good and more quite.

this is my current setup



Guarder high speed revolution Motor
Guarder Steel Gears
Element Piston
Systema Area 1000 piston head
Systema tight barrel
Guarder hop-up rubber and H Hop
Battery 9.6v 2400mAh

everything else is the standard Star parts including the Cylinder Head

I also had to file down the piston to fit my Star gearbox as they are a little different to the normal V2 as for the quick release spring.



when i got the Area 1000 piston head i did not really know you could get ones that make a nicer quiet sound.

I was just looking at the sorbo pad and Systema Silent Head Set but the Mask setup looks nice.

not sure what to go for now. do you think just adding a sorbo pad will do or should i go for the Mask setup