Help for propane injection

Boom! The classic potato gun harnesses the combustion of flammable vapor.
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CannonBall
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Posts: 102
Joined: Tue Mar 20, 2007 5:16 pm

New problem has occured.
My butane has different presures at different temperatures.
Its not easy to get the right ratio.

But i cant find propane PURE.

Cheers
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CannonBall
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Posts: 102
Joined: Tue Mar 20, 2007 5:16 pm

I have made a new gas meter my other one was rather leaky.
And my gas presure was a little to low for my other meter setup.
I made some calculations.
Plzz reply if my calculations are wrong.
Chamber volume = 2242
Meter Volume = 106.4
Fuelratio = 3.53333
Volume of gas needed = 79ml
Calculated meter presure = 0.74 Bar = 11psi

Are my calculations correct?

Patrick 8)
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