Measureed VS Metered Propane (obviously in Hybrid)

[shiftyguy]

I am making a new Hybrid and i am going to use Measured propane with a Low pressure gauge, since if you add propane into a sealed chamber the pressure is bound to increase. and by knowing the mix ratios, you can come up with comprehensive measurement system.

Has anyone measured there propane this way? It removes ball valves and whatnot.

Below is a chart i made of mix ratios:

Air Fuel Mixtures Propane
MIX Prop PSI Air PSI Prop PSI Air PSI
1 1.06 14.70 1 13.82
2 2.13 29.40 2 27.63
3 3.19 44.10 3 41.45
4 4.26 58.80 4 55.26
5 5.32 73.50 5 69.08
6 6.38 88.20 6 82.89
7 7.45 102.90 7 96.71
8 8.51 117.60 8 110.53
9 9.58 132.30 9 124.34
10 10.64 147.00 10 138.16

Anyone have any thoughts?

[shiftyguy]

The chart did not display well
i have an attached jpg

[Jared Haehnel]

I'm not sure if I understand you correctly and the chart is a bit hard on the eyes....

The very little amount of propane your adding to the chamber doesn't increase chamber pressure by that much. It won't change your ratio any...

Edit you edited it before I had posted...the chart is much better now 8)

[DYI]

The pressures you calculated are completely inaccurate; each "x" adds 0.686 psi propane, as was debated at great length between me and SB15.

How exactly did you calculate these pressures?

[shiftyguy]

I am not measuring my mixture based on Atmospheric pressure "x" I am basing my measurement on Measured Propane Pressure and then adding an approperate amount of Compressed air.

[shiftyguy]

I gathered my information from SpudBlaster15 discussion on "Fuling Hybrid 101"