The ideal air/fuel ratio for an internal combustion engine is 14.7:1, by weight. 14.7 pounds of air to 1 pound of gasoline, for instance. If a fuel has a lower specific gravity (weight) it takes more volume of that fuel to produce the same weight and thermal energy (BTU's). When Dad started using alcohol in the family-owned race car back in the early 1950's, Carter Carburetor reccomended that he increase the cross-sectional area of the main jets X10, approximately 3 times the diameter of gasoline jets. When they finally got a 300 cubic inch (bored & stroked) flathead Ford engine running right on an alcohol/hydrogen peroxide mix, it was getting 8 laps per gallon on a 1/4 mile dirt track!
Jerry

Last edited by Hotrod Lincoln; 05/02/2010 4:06 AM.
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