Back in the 50's we ran Methanol in the family dirt track car, a 34 Ford coupe with a flathead V-8 engine. Ethanol has slightly more BTU output than Methanol, but either one is way behind gasoline in total energy released. You'll need much larger main jets, which will drop the fuel mileage to about half what it is currently. On the upside, you can raise the compression to above 10:1 if you choose, as long as you don't go back to using straight gasoline. Ignition timing can also be advanced. When we started jetting the flathead carbs for Methanol, Carter Carburetor told us to increase the cross-sectional area of the main jet 10 times, which is approximately 3 times the diameter of a gasoline jet. Then they said,"If necessary, go richer". With a 300 cubic inch engine with 11:1 compression, we were getting 8 laps per gallon on a 1/4 mile track. Of course, that was wide open, with a very radical camshaft, and about 5,000 engine RPM. At street speeds with a less-radical engine, I'd expect to get 8 or 9 MPG from the same size engine.
Jerry
