Xxplosive42o wrote:But he said spray and pray and keep price in mind; therefore, running a metered propane system is out of question.
Keeping price in mind the best fuel system (heck it's one of the best even if money isn't an issue) is a $0.99 disposable butane lighter with a $2 syringe and a hunk of insulation from a piece of wire.
Cheap (<$5), accurate, easy to use. The 2cc syringe shown is good for a mini. For a more typical size gun you need a 60cc syringe. The needle shown is helpful but not required. Needles typically cost about $1.
A full blown meter system with propane tank, regulator, valves, meter pipe etc. only beats the syringe in "bling factor" and fueling speed.
Heck, omit the syringe and just use the lighter plus wire insulation. You still get a fuel system that is much easier to control then any aerosol can.
dudeman508 wrote:I tryed using some anti static spray, that i know for a fact is very flamamble, my chambre is about a foot and a half of 1in pipe and i spent about 10 minutes today trying to get the fule mix right .Is it that exact or am i doing somthing wron
Yes, fueling has to be fairly precise. The combustion limit for propane in air is about 3% to 8% (by volume). Less than 3% or more the 8% propane won't ignite.
In addition, even if the amount is fuel is correct if it is poorly mixed it still won't ignite. Gases diffuse (mix) fairly slowly and it might take anywhere from a couple seconds to a couple minutes for the fuel to fully mix in the chamber. That's why a chamber fan is often included. The fan will mix the fuel consistently and quickly. (The fan also increases the burn rate of the fuel and helps to vent the chamber between shots).
A long skiny chamber (like your 18" x 1") will mix very slowly, a short fat chamber mixes quicker.
For your gun you'll need to wait a minute or more after fueling and closing the chamber. Invert the gun slowly a few times to help mixing (propane, butane etc are denser than air). Pull the trigger. If the gun doesn't fire you need to open up the chamber and ventilate it well before trying to refuel. Adding fuel to an already fueled gun that you have attempted to fire is not recommended. The unsucessful firing will have consumed some of the fuel and oygen in the chamber.
For your chamber I would start with the shortest burst of fuel I could get my finger to do. If it doesn't fire then vent and try two of those short bursts. Keep doubling the number of short bursts until the gun fires. Once the gun fires you can fine tune the fueling by small amounts.