I know a handful of tuners that wouldn't do "kill mode tune" because of the inconsistency of pump e85. C85 is a different story.
Wow that's a significant reduction in mileage! I'm really on the fence about doing this upgrade, I will have almost $3K in the parts/labor/tune to do this.On a 14gal tank with 91-93 was about 300 miles and same set up on E was about 180 miles. Give or take