Its all up to you. I've been prepared to buy a HPFP under my own dime if it ever took a shit. To me, the power difference between map 2 and 7 is rather significant, but now its probably slower because traction is nonexistent lol. Oh, and be prepared for your mpg to take a hit, but you should already know this as E85 has lower energy content than gasoline. I would never recommend running straight E85 on these motors, however, I've been very content with 50/50 blends. Cheap race fuel FTW!
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