Quote Originally Posted by sseilmnop View Post
Run e85 all the time if you switch. Don't switch if your not changing pulley size, your not gaining anything.
Youll gain some power just running on e85 alone.

Running 93 on 42# injectors is rough. It will technically work but I wouldn't suggest doing it for extended periods. If you plan on running 93 in it try to keep the e content as high as you can for as long as you can. Your car will happily flex fuel itself between e30 and e90 but that range may be different depending on how your car specifically likes to run.