Thanks for linking to your first article, I had missed that one. I really want to build one. You sold me in the first article, and I only drink about 4 beers a year!
I have a friend who works on model T fords, and those engines were designed to be adjusted to burn diffrent fuels like alcohol!
I would want to use sugar cane juice but we can get into that once I manage to build one. I'm going to have to go over this several times, luckily my brother-in-law can solder.
If you want to produce alcohol for your car than you need a bigger pot and probably a bigger column as well.
An old beer barrel might be a good option with a 3 inch copper pipe.
I don't actually have a car yet! I have a few electric and gas motors for different machines, I'd probably start with the weed wacker which consumes the most gasoline of anyone on the farm!