Quote:
Originally Posted by motoloco
I spoke to a LPG guru last weekend and he explained why dual fuel DOES NOT work well, made since why every one quit using dual fuel systems in the late 80's. Basically the motor HAS to be set up for propane ONLY to get the full benifits, you need a "mixer" instead of a carb and you run the timing at like 12 degree's advanced, this way you get as much or more power and MPG. The old school dual fuel will work but they dont do great on either fuel that way. I dont think you would have emmiss. issues seeing as LPG burns way cleaner than petrol burners. I checked into this because I want to propane my V8 80 series possibly.
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Okay, the reason dual fuel is not the best option is that a motor has to be optimized to use pane. The higher relative octane of propane allows for a greater amount of advance without pinging and a higher compression ratio. Bu making these simple modifications you can reclaim some of the power loss issues. If you do not optimize the motor for propane. You will loose a bit of power. In most cruisers, that power loss is not huge by any means. They are a low power motor to begin with. A loss of 5 hp will not be significant.
Depending on the adjustment, a car on propane can give off at least as much is not more emissions than a well tuned gasser. It is all about adjustment. if it is running efficently, the decrease to pollutants is not that impressive.
$0.60/ gal and I would be driving my 40 all over the town. 7K for a conversion is nuts.
www.propaneguy.com or
Propane Conversion Kits Both are good guys..