[diomed]

Thanks for the replies. Seems like it is possible to run a fairly high mix of alcohol just by adjusting the GAV.

I forgot to mention, the podcast was talking about how unsafe leaded gasoline was and that it was developed to prevent engine knock. They were making the point that alcohol can prevent knock and the Model A was capable of running on alcohol. I feel like I need to add the caveat that I'm simplifying the topic for brevity. I know there is a lot to fuel science.

Thanks again!