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June 11th, 2007, 04:35
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#1 |
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piston body
hello guys!
What is the best piston body for 25-30 R/S.im planning to modify my stock TMm4A1 to a hi speed set up. polycarbon piston or aluminum piston body which is better and more durable? please delete this if there is already a thread posted like this. thanks! T |
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June 11th, 2007, 10:49
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#2 |
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Hello !
I'd definitely go for the Aluminium piston body.If anything goes wrong, which is very possible with a hi-speed setup, the piston will maybe survive. I have one in use right now that survived two gear stripping. the teeth got attacked but are still functionnal. the polycarbonate will just explode. |
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June 11th, 2007, 14:22
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#3 |
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Scotty aka harleyb
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If something's going to break, I'd much rather it be a $20 polycarb piston than a $100 high speed gear set.
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June 11th, 2007, 21:18
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#4 | ||
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The Angel High-Speed piston is one of the only ones I know of that's specifically designed for high ROF setups. It's missing the second-last tooth, but the same mod can be done on a stock TM piston with a dremel tool.
Mantelope's right, too. Pistons are cheap, gears are expensive. Which would you rather replace, because in a catastrophic piston failure, you;re going to replace one or the other, if not both.
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June 11th, 2007, 22:48
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#5 |
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to jimski, mantelope & skruface many thanks to you guys.
please see the pic. what do you think about this mod? i got this pic in the japanese airsoft blog. 
Last edited by Tirador; June 11th, 2007 at 22:50.. |
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June 12th, 2007, 00:43
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#6 | ||
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It does lighten the piston and increase ROF, but it also reduces it's strength, making piston failure more probable. As long as you're using a very light spring, it shouldn't be a problem.
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June 12th, 2007, 01:03
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#7 |
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GBB Whisperer
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I've seen similar mods before as well.
I've seen some even crazier mods, such as shortening the piston stroke length. Less travel distance equals faster cycling. The shorter your inner barrel, the faster you can make your ROF. Combined with a SHS gear set, and a high speed motor, you'll end up with a gun that no magazine can keep feeding properly. lol. |
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June 14th, 2007, 03:22
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#8 |
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June 14th, 2007, 04:10
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#9 |
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Hey Skruface, why dremel away the *second* last tooth instead of the last one to shorten the stroke of the piston?
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June 14th, 2007, 09:19
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#10 | ||
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The gears have to catch on the last tooth, which (if you look at a piston) is 1.5 to 2 times the thickness of the other teeth, because of the stress it has to bear as the initial point of contact between the gearset and the piston.
Taking out the 2nd last tooth allows for some room for error if (under excessive high ROF) your gears begin their second cycle before the piston is returned to battery from it's first cycle... I'm sure you can imagine what happens when a forwards-moving piston meets backwards-turning steel HS gears moving at 30 revolutions per second - it's strips out ALL the piston teeth, and usually rips the end off the piston. See this link for an image showing the missing last tooth on the Angel High Speed piston: http://redwolfairsoft.com/redwolf/ai...l?prodID=18580
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Last edited by Skruface; June 14th, 2007 at 09:23.. |
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