Pistons

Big Pepa · March 12th, 2009, 04:21

My mp5 eats pistons like a big fat American at a buffet table (sorry that's a bad Canadian Joke). I've been thinking about putting in an systema aluminum piston.

The reason why it's eating pistons is because I got a super high RoF. It's a fun gun really.

Lately I've been toying with the idea of an aluminum piston. I've never used one. I have read many con's about them but it's all scattered around this forum and the internet.

Anyone with experience with these?

Styrak · March 12th, 2009, 04:34

I have an all-aluminum CNC'd piston in my TM AUG @ 400fps.

Seems good. The only downside I can tell is that it will wear down stock TM gears where a plastic piston won't. In that case the piston will outlast the gears. If you have gears made out of something better like steel they will outlast the piston.

Big Pepa · March 12th, 2009, 04:39

Aside from my cylinder nothing else is stock in the mech box.

I have a fairly high RoF set up with my MP5 with a m90 spring. I was thinking about shaving the first tooth after the butt end on the piston. On poly carb pistons that tooth seems to get ripped off within the first 5 or 6 shots. What do you think?

Styrak · March 12th, 2009, 04:42

Yeah, people usually take off 1 or 2 teeth on highspeed setups.

Big Pepa · March 12th, 2009, 04:44

Cool, thanks for the fast response and advice.

milehigh · March 12th, 2009, 04:47

I've never shaved teeth before, but wouldnt it make sense to remove the last tooth or two from your sector gear, rather than your piston?

Styrak · March 12th, 2009, 04:51

Quote:

Originally Posted by milehigh

I've never shaved teeth before, but wouldnt it make sense to remove the last tooth or two from your sector gear, rather than your piston?

...no.

No one does that. I'm not even sure what that would accomplish. Stripping your entire piston from the head back?

milehigh · March 12th, 2009, 04:54

Well if you take a few teeth off the butt end of the piston, how would the sector gear catch it to pull it back?

damage · March 12th, 2009, 04:59

Your location say your from Japan. Get your self either SuperCore or Prometheus Hard Piston.

Styrak · March 12th, 2009, 05:29

Quote:

Originally Posted by milehigh

Well if you take a few teeth off the butt end of the piston, how would the sector gear catch it to pull it back?

You don't take off the first big tooth/end.

milehigh · March 12th, 2009, 05:34

So you remove teeth from the front end of the piston?

Big Pepa · March 12th, 2009, 07:06

Quote:

Originally Posted by damage

Your location say your from Japan. Get your self either SuperCore or Prometheus Hard Piston.

Super Core is Polycarb. My local guy can't get his hands on one either. All I use is Prometheus Hard pistons... they still get shredded. It's not a frequent thing but I just don't want to take apart my mech box again for another year.

Big Pepa · March 12th, 2009, 07:20

Besides, everyone out here tells me that the prometheus pistons are just as good (if not better) then the Super Core's.

The prometheus are indeed good pistons. I've had one in my M4 for almost a year and a half. The thing is rock solid.

My problem is that with my MP5 the Rof is crazy fast. Systema turbo motor, fet, prom high speed gears, M90 spring, 9.6v battery. I'm cranking out about 35 or so RpS. The ass end gets ripped off even the best polycarb pistons after a while.

Jimski · March 12th, 2009, 08:32

Quote:

Originally Posted by Big Pepa

Super Core is Polycarb. My local guy can't get his hands on one either. All I use is Prometheus Hard pistons... they still get shredded. It's not a frequent thing but I just don't want to take apart my mech box again for another year.

aluminium piston like Styrak says, never strips.Your sector gear will die first.

m102404 · March 12th, 2009, 08:50

I always seem to get the numbering mixed up...so...

Starting from the rear end of the piston, the end where the spring goes into it...leave the first tooth alone. Shave/file the second tooth down. Some guys cut it right out...others until it is flush with the piston body...some just take half of it's height off.

I suppose that you don't want to remove any more material than is necessary...just whatever is going to get bashed.

A poly piston will fail and will not wear out the sector gear. An aluminum piston will probably not fail, but will transfer a lot of shock to the front of your mechbox an wear the sector gear.

Up to you. Go in to check/maintain the piston...or check/maintain the gears/mechbox. I suppose you could balance it off if one component or the other is harder/more-expensive to get.

Personally I'd protect the gears and mechbox...they're more expensive than a good piston.

Keep an eye on the engagement surfaces of the first sector gear tooth and the first tooth of the piston...you want that surface to be as flat/flush as possible.

Have fun!

Tys

Home	Forums	Register	Gallery	FAQ	Calendar
Retailers	Community	News/Info	International Retailers	IRC	Today's Posts

British Columbia	Alberta
BCAC	EAR
Op-For	JOC
Northern Arms Airsoft	Skunkworx Airsoft
Airsoft Kelowna	RAAT
Prince George Airsoft	Manitoba
Saskatchewan	MAA
SK Airsoft	Ontario
PDW	Airsoft Ottawa
South Sask Mercs	Snow Dragons
Quebec	1st Ranger Platoon
PQAC	Wolfpack Tactical
1st Pathfinders Regiment	TTAC3
Quebec Airsoft
MTX Airsoft	Atlantic
FAQc	Atlantic Airsoft

March 12th, 2009, 04:21	#1
Big Pepa Trader rating Join Date: Feb 2009 Location: Japan	Pistons My mp5 eats pistons like a big fat American at a buffet table (sorry that's a bad Canadian Joke). I've been thinking about putting in an systema aluminum piston. The reason why it's eating pistons is because I got a super high RoF. It's a fun gun really. Lately I've been toying with the idea of an aluminum piston. I've never used one. I have read many con's about them but it's all scattered around this forum and the internet. Anyone with experience with these?

March 12th, 2009, 04:34	#2
Styrak Trader rating Join Date: Jan 2007 Location: Saskatoon, SK	I have an all-aluminum CNC'd piston in my TM AUG @ 400fps. Seems good. The only downside I can tell is that it will wear down stock TM gears where a plastic piston won't. In that case the piston will outlast the gears. If you have gears made out of something better like steel they will outlast the piston. __________________ Airsoft Sales and Repair/Upgrade Services

March 12th, 2009, 04:42	#4
Styrak Trader rating Join Date: Jan 2007 Location: Saskatoon, SK	Yeah, people usually take off 1 or 2 teeth on highspeed setups. __________________ Airsoft Sales and Repair/Upgrade Services

March 12th, 2009, 04:39	#3
Big Pepa Trader rating Join Date: Feb 2009 Location: Japan	Aside from my cylinder nothing else is stock in the mech box. I have a fairly high RoF set up with my MP5 with a m90 spring. I was thinking about shaving the first tooth after the butt end on the piston. On poly carb pistons that tooth seems to get ripped off within the first 5 or 6 shots. What do you think?

March 12th, 2009, 04:44	#5
Big Pepa Trader rating Join Date: Feb 2009 Location: Japan	Cool, thanks for the fast response and advice.

March 12th, 2009, 04:47	#6
milehigh Trader rating Join Date: Dec 2006 Location: Victoria	I've never shaved teeth before, but wouldnt it make sense to remove the last tooth or two from your sector gear, rather than your piston?

March 12th, 2009, 04:54	#8
milehigh Trader rating Join Date: Dec 2006 Location: Victoria	Well if you take a few teeth off the butt end of the piston, how would the sector gear catch it to pull it back?

March 12th, 2009, 04:59	#9
damage Trader rating Join Date: Jan 2005 Location: Port Coquitlam, BC	Your location say your from Japan. Get your self either SuperCore or Prometheus Hard Piston.

March 12th, 2009, 05:34	#11
milehigh Trader rating Join Date: Dec 2006 Location: Victoria	So you remove teeth from the front end of the piston?

March 12th, 2009, 07:20	#13
Big Pepa Trader rating Join Date: Feb 2009 Location: Japan	Besides, everyone out here tells me that the prometheus pistons are just as good (if not better) then the Super Core's. The prometheus are indeed good pistons. I've had one in my M4 for almost a year and a half. The thing is rock solid. My problem is that with my MP5 the Rof is crazy fast. Systema turbo motor, fet, prom high speed gears, M90 spring, 9.6v battery. I'm cranking out about 35 or so RpS. The ass end gets ripped off even the best polycarb pistons after a while. Last edited by Big Pepa; March 12th, 2009 at 07:22.. Reason: spelling

March 12th, 2009, 08:50	#15
m102404 Tys Trader rating Join Date: Apr 2006 Location: Toronto	I always seem to get the numbering mixed up...so... Starting from the rear end of the piston, the end where the spring goes into it...leave the first tooth alone. Shave/file the second tooth down. Some guys cut it right out...others until it is flush with the piston body...some just take half of it's height off. I suppose that you don't want to remove any more material than is necessary...just whatever is going to get bashed. A poly piston will fail and will not wear out the sector gear. An aluminum piston will probably not fail, but will transfer a lot of shock to the front of your mechbox an wear the sector gear. Up to you. Go in to check/maintain the piston...or check/maintain the gears/mechbox. I suppose you could balance it off if one component or the other is harder/more-expensive to get. Personally I'd protect the gears and mechbox...they're more expensive than a good piston. Keep an eye on the engagement surfaces of the first sector gear tooth and the first tooth of the piston...you want that surface to be as flat/flush as possible. Have fun! Tys

Pistons

Upgrades & Modifications