IIRC, alcohols have roughly half the btu's per gal. as gasoline. I know that alky carbs have jets about twice the xsect. area of gas jets. We used to overdrill gas jets with a drill size about 1.4x the original jet diameter (sqrt of 2 is 1.44ish) when converting to alky on round track cars and dragsters.

Therefore, if you're burning gasahols, your power and mileage will go down. It always looked like a case of ecological correctness geting in the way of good engineering. Mistrust all radicals. They don't let either science or common sense get in the way of ideology...