ODdave
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so my m37 need a fuel tank........ what are the thought on propane????
Poll added. Yes/No
Poll added. Yes/No
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Based on our experience with my sons propane powered pickup I have always thought dual fuel would be a must if you were expecting to use the vehicle for something more than localized work like in a mine or lumber yard. The fuel is remarkably clean burning and can cause valve problems if not compensated for. Our system used a vaporizer (heater) that attempted to make sure the fuel was totally vaporized. However, the big block manifold pattern and some less than complete vaporisation made the front left and rear right pistons run slightly lean. ~~ We used this truck in an all around capacity for about 5 years before we converted it back to regular gas. The engine was like new when we made the conversion and that was after 13 years and thousands of miles as propane powered. ~~ Since our experience with this truck, I have always thought a direct injection propane system might be something worth considering. ~~ There are differences in specific energy between LPG and pump gasoline and in fact differences in LPG specific energy depending on the gas source. Butane shows up in LPG in varying amounts in different parts of the country.Driveability Will be better on propane. The hard starting problem is easly fixed with an electric priming valve on the vaporizer. Consistent fuel distribution across all six cylinders will make up for the loss in power as opposed to the gasoline setup. The fuel econmy might even go up because of the better fuel distrobution. If you were to block off the host spot in the intake you could probebly get a few more hp out of it because of the increase in intake charge density. Also if your worried about being able to find fuel you could always set it up for dual fuel.
What gasoline carb does it have on it now?
Yes to the EGT probe except we had a dual reading pyrometer and the manifolds were equipped with a probe port in each tube. We moved the 2 probes up and down each bank and checked the temperatures at like operating conditions. After we had some sense of which cylinders were running hotter, we left the probes there. We also used a portable IR temperature gage to confirm the pyrometer readings.How did you determine that the front left and right rear were running lean? Did you have EGT probes installed in all 8 exhaust runners? Last time i checked plugs don't really color or it takes lots of miles to show any deposits when you run propane. Did you ever try running a 1" or 2" spacer under the mixer? It probebly would of cured your mixture problem.