I understand e85 is not needed for 450WHP but is there any disadvantage to going that route. I mean 450whp is a random number I came up with based on cost. If I get 500whp reliably for the same cost that would be even better. I do want the car to be reliable, not because it will be driven daily or anything; only because i don't want to constantly spend time just messing with the car. Is the map switcher still the best option (for $700) if i don't want to constantly mess with manually tuning the car or is there a better option.