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Posted: Sat Feb 12, 2011 7:37 pm
by AnotherSnappedLine
Im debating my choice...it will be a spring loaded QEV so I need something light and quick(Epoxy). Im thinking of a 3/4-1" valve to a 1/2" barrel. me design will be sort of like this: [/url]
Posted: Mon Feb 14, 2011 3:28 pm
by daniele tn
Has anyone tried to cast a piston out of this stuff?
http://www.instructables.com/id/Making- ... dly-Plast/
It look like it could be solid and lightweight.
Posted: Mon Feb 14, 2011 6:41 pm
by AnotherSnappedLine
I looks pretty flimsy. I wouldn't take it above 50PSI
Posted: Mon Feb 14, 2011 8:38 pm
by saefroch
Bioplastics info
Other plastics info
UHMWPE is usually considered the best material for a solid piston.
Posted: Mon Feb 14, 2011 8:48 pm
by nadjatee1996
I'm going to use it as a filler
Posted: Mon Feb 14, 2011 10:52 pm
by clemsonguy1125
I've tried the bio plastic, be molded as it shrinks when it dries and can only be rolled out in flat sheets if you want it to end in the same shape
Re: What material make a best piston?
Posted: Tue Feb 22, 2011 1:05 am
by r00kie
AnotherSnappedLine wrote:I've read about Bondo, epoxy, and hot glue to make a piston; which is the best substance?
Don't use hot glue if you have a warm climate, I found out the hard way that they tend to expand and become far less efficient, sometimes even jamming completely.
Epoxy is great, I can't fault it for a piston, it's highly mouldable, and sandable once it dries. JSR has a good thread somewhere showing epoxy pistons with different cores to reduce weight.