Ohh, and PVC is fine to get in canada, its just kinda pricey.
You can find it at any decent plumbing and heating store.

You will be fine with ABS, I have used all abs in my guns and the have been fine. Mine altho did eventualy blow, but after a few months of steady use. My one smaller simple gun with 3" chamber did but luckily it just sacked me. My large advanced combustion was taken out of commission before it had t...

Dude, I live in Timmins. you can get pressure rated shit here.
Hit me up on msn, I will tell you were. Andrew.rk@hotmail.com

I did not know that,I appologize.But the concept still remains, I am somewhat asking if I was right.

Would it not make it more efficient to have the valve in the front? You should be loosing quite alot of pressure from the flow through the hoses. Just a thought.

Okay, well the way I understand the piston is off the chamber instead? Im sorry but that is all I get, I have no idea as to how a regular piston would move back from more pressure in the chamber.

I don't full understand the concept of your second gun, Sorry.

Hey guys, I have always wanted to build a small but strong portable hybrid, so My idea was to make it like Fnord's Hybrid and use a vertical piston so make it faster and easier to use. So I will be making it with Sch 80 steel, and probably a 2" main chamber, and a marble barrel. because I wanted it ...

go on http://www.burntlatke.com and read on how to make a propane in jector, it gives you detailed instruction and parts list

Yeah, iv seen those at home depot befor for like $25 canadian, but i already have an ignition box from www.spudshot.com, those are just like pizeo idnitions but use like 2 AA instead to make the spark

Yeah, i would do it... even if it does crack it will just split all the way down the side, but i would do a remote igntition fro the first few tries. just until your comfortable with it

ok so it reads correctly, thanks

On burnt latke it says that a propane tank will sit at around 90, when i open me regulator all the way my presure guage goes to around 120 psi or more, i want to use my gun for a science fair project, test the fuel to air mixture...i know its alread been tested to work best at 4.03% but i still want...

LOL, the pic of the transformer remindse me of the time my dad shot one with his 12 guage... his sawmill was on fire from an electrical fire and they needed the power off befor they could start to put it out, and the hydro company wouldnt shut it off so he shot it!

try to make it so that instead of the small vavle moving the rod, have it somehow realeave packpreasure off the big piston, something like this, i dotn know if it would work but whatever