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Old 11-09-2010, 07:55 AM   #16
Number21
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Join Date: Aug 2009
Location: Oregon
Posts: 611
Re: Improve mileage 350 with Quadrajet

LPG has about 79% of the energy content of gasoline. If you get 8mpg on gas, 6 would be about right on LPG. There is a huge difference between the fuels, "bi fuel" engines are extremely inefficient on LPG. If your engine was tuned exclusively for LPG, at 100+ octane, you would get way, way better mileage.
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'73 K20 Cheyenne Super Camper Special 350/TH350/NP205 sittin' on 33's.

You can set my truck on fire and roll it down a hill,
and I still wouldn't trade it for a Coupe de Ville.
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