Maybe your numbers are still wrong. Source?
Even best case scenarios aren’t much better. Leaving aside Pimentel, see this: http://www.popularmechanics.com/cars/alternative-fuel/biofuels/4237539
“The National Renewable Energy Laboratory states that, “Today, 1 Btu of fossil energy consumed in producing and delivering corn ethanol results in 1.3 Btu of usable energy in your fuel tank.””
Add in the water costs, and it’s a big WTF situation.
Now, if you want to talk cellulosic ethanol, that’s another story. But corn ethanol is STUPID.