Originally Posted by Mark221
My tuner told me all you need to do is tune for it as long as you don't have to many mods that will put you past your fuel pump or injector capacity. It's good to do if you don't want to use racing fuel because of the price but it's not worth it if you don't need the extra octane. You can't switch back and forth like a flex fuel car. And it does attract water and will rust internal components if not driven often
E85 flows a lot faster than regular gas, on a stock car with the conversion you will need better injectors.