Home made E50 for racing?

I agree Duane. It is about both. But post began with motor at 11.5:1 compression. Thus detonation is not a concern for 50/50 mix. (As fuel matrix shows.) Thus the question? Can a gas carb produce the required fuel flow? I'm guessing not well. There are plenty of E-85 conversion kits to solve the issue. But of course. Now you have the opposite problem if you elect to run on gas. Solution? I have 2 carbs. A gas carb in the trailer. Lol.