Yeah. My main concern is that my fuel delivery system won't be able to keep up enough flow of E85 to maintain the lambda settings. I'm thinking, though, that as long as I drive normal for street (nothing more than 200% load... which doesn't happen often for me anyway), I should be fine.
Of course, I'm also wanting to adjust my current tune to maximize the usefulness of E85. I have an expert in the field (my car + E85 + tuning) whom I will want to consult, but I might also see if some people here would mind helping me see if I can mimic an Atkinson-cycle for my engine at cruise loads.
