Originally posted by Star Turbo Talon
injectors need to be upgrade due to size.....it takes far more E-85 to accomplish the same AFR

Exactly it takes roughly 30-35% MORE e85 to create a stoich mixture.
Gasoline burns best at a 14.7:1 mix and e85 is closer to 10:1, so basically you have to run a richer mix. If you were to figure out what size injectors you need for your application and then upsize them by 33% you'd be almost dead on for what you'd need to run e85 without any other major tuning needed. Also remember you'll need a bigger pump to supply the extra fuel. Changing the filter MUCH more often is also a necessity because the e85 will break up all the junk that has built up in the tank and fuel system over the 10-15 years that our cars have been on the road