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Post by Connors on Jul 13, 2014 20:15:36 GMT -5
So after doing some work on my P90 I now need a new piston. I've installed a MOSFET and high speed motor and after 100 rounds on a lipo my piston shit the bed.
What's a good piston that will hold up in a high ROF setup? I typically just use semi so I'm really not concerned about super strong stuff for sustained full auto. Just something that will hold up and be bake to handle occasional bursts of full auto without getting eaten by the gearbox. If there is a good brand with a full rack of metal teeth that would be even better.
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Snarf
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Post by Snarf on Jul 13, 2014 20:25:47 GMT -5
My SCAR recently stripped its piston so I was researching pistons too. I found out that the Prometheus hard pistons and Systema supercores are the best polymer pistons out there, but they're pricy. The G&P white piston is also supposedly nearly invincible and cheaper. And with only 3 metal teeth, it should be light enough, in theory of course. But I don't even know if the P90 uses a V2 piston actually.
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Post by Connors on Jul 13, 2014 20:33:25 GMT -5
As far as I know, the spring guide piston, piston head, cylinder, and I think gears are all the same as version 2/3. However I have not been able to confirm on the gears. I have a v2 guide and stock TM v2 piston in right now same as the one that bit the dust, and no problems.
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T6e9a
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Post by T6e9a on Jul 13, 2014 20:35:18 GMT -5
P90s take your standard 15 tooth piston.
But what I recommend, is checking out clandestineairsoft.com, and look at the ZCI meal toothed piston or the SHS blue. They are pretty cheap there($9 for the SHS blue, at the moment, ZCI out of stock) and they preform beautifully.
Just when installing, make sure that it slides freely in your gearbox shell.(testing the piston rails to the gearboxes rails) sometimes modification is needed insde the rails for it to cycle smoothly. (Modification done easiest on the piston with use of a dremmel)
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Post by Coldwave on Jul 14, 2014 8:15:12 GMT -5
Stay away from the G&P white pistons. They strip teeth just as easily as any other poly toothed piston. They're piston heads are nick named the shatter head because of the porting in them. Currently I use a king arms nylon fiber piston with a full metal tooth rack and love it.
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Snarf
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Post by Snarf on Jul 14, 2014 8:38:22 GMT -5
^Thanks for the heads up. I was about to buy one.
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bobbunny
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Post by bobbunny on Jul 14, 2014 10:18:29 GMT -5
If you do use a full rack of metal teeth, you have to be vigilant with your bursts. I've heard more than a couple stories at games where people have stripped their gears because of that.
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inj
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Post by inj on Jul 14, 2014 10:35:36 GMT -5
P90s take your standard 15 tooth piston. But what I recommend, is checking out clandestineairsoft.com, and look at the ZCI meal toothed piston or the SHS blue. They are pretty cheap there($9 for the SHS blue, at the moment, ZCI out of stock) and they preform beautifully. Just when installing, make sure that it slides freely in your gearbox shell.(testing the piston rails to the gearboxes rails) sometimes modification is needed insde the rails for it to cycle smoothly. (Modification done easiest on the piston with use of a dremmel) +1 to this. I don't have any firsthand experience with the new ZCI blacks, but form what I hear they're pretty good. I do however have plenty of experience with the SHS 15t. It's a tank. Unless you get a lemon, It will not break. Ever. edit: If you do use a full rack of metal teeth, you have to be vigilant with your bursts. I've heard more than a couple stories at games where people have stripped their gears because of that. If you strip your gears because you're using a metal racked piston, your either doing something wrong, or using weak gears. Even combat machine gears shimmed decently should be able to handle the stress. The XYT gears of JGs, A&Ks, and Dboys guns will have no problem at all with it. It could be Pre engagement, but that's very easy to counter. A metal racked piston in itself will not cause other things to break. |
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T6e9a
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Post by T6e9a on Jul 14, 2014 11:09:25 GMT -5
They may have also not corrected their AoE. Incorrect AoE with a metal toothed piston, I could imagine that causing such horror stories.
But if you are doing any sort if high speed build, correcting AoE is a MUST. It helps reduce wear on the piston, along with putting less stress on the gears, providing a more reliable and consistent pick up, and just overall longevity.
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Snarf
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Post by Snarf on Jul 14, 2014 11:09:50 GMT -5
I've read that you should have the piston be the weakest spot in the gearbox so when a jam happens, it's the first (and hopefully only) part to break. That helps to save the rest of the gearbox.
More on topic, wouldn't a full metal tooth piston be a bit heavy for high speed?
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T6e9a
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Post by T6e9a on Jul 14, 2014 11:12:53 GMT -5
I personally see more benefits from a full metal toothed piston for its reliability in a high speed build. To counter the weight issue, just Swiss cheese it, don't use bearings, and use a good POM head or any other sort of light weight piston head.
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inj
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Post by inj on Jul 14, 2014 12:51:59 GMT -5
The jam thing is a big debated topic. I personally will always use metal toothed pistons. I've never had a compression jam, and have heard very few stories of them, so until it starts happening to me frequently, I don't see any reason to change what I've been doing.
As for weight, people make a bigger deal out of it than it really is. Yeah, it has some effect on pre-engagement, but spring power does a lot more. Generally an M120 is good up to around 30rps. An M130 is good for pretty much any single sector gear build. Just use a more powerful spring and short stroke down to your desired velocity, and you'll be fine.
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airborn
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Post by airborn on Jul 16, 2014 22:55:05 GMT -5
Ive used the Lonex Blue and my friends have used the Lonex reds. From experience they're tanks. Ive recently picked up an Shs 14t and I'm impressed with it and it seems to be good build quality. I havent run it in anything yet so I can't confirm my accusations but it seems to be nice.
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Post by Stinger on Jul 25, 2014 16:04:51 GMT -5
Ive used the Lonex Blue and my friends have used the Lonex reds. From experience they're tanks. Ive recently picked up an Shs 14t and I'm impressed with it and it seems to be good build quality. I havent run it in anything yet so I can't confirm my accusations but it seems to be nice. I am currently running a Lonex Extreme Toughness (red) piston, as is my teammate Killer. They are extremely solid. There are versions with full steel teeth and with ten steel teeth. Also, the Prometheus Hard Piston (black) is supposedly one of the toughest around, and the plastic it's made from is polyacetal copolymer. While it doesn't have full metal teeth, the plastic teeth are supposedly stronger than some low-end metal teeth. |
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Post by natethegreat32 on Aug 10, 2014 20:50:56 GMT -5
The shs 15t is made out to be one of the best upgrade pistons. My only gripe about it, is that the pickup support is nearly un exsistant. The lonex pistons are... Good. But for the money id rather have an shs or zci piston.
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