i gained 40whp and 100ftlbs at the tires by doing nothing more than filling up with e85 and adding fuel to the tune. didnt change boost or timing at all. i drive my car almost every day and im very happy that i switched to e85. i run 3 intank pumps with 105lb injectors. you dont need a sumped tank or any of that nonsense, but i would look into doing a return style system if you can. depends on how much power you want to make.