Last year I used E85 all year I live in Minnesota, then winter came along and I start having real bad detonations on the cold morning starts, after a few failed attemps to fix it, the tuner change it back to 92, after that find out I had bad injectors (Agency Power Stock modified) replace those and now I am looking foward to get back on E85.
Last year data:
1) Your injectors size: Agency Power Modified stock 816cc
2) Injector duty cycle (if you have it): Dont know (Tuner say max out 18 psi)
3) Elevation: Dont Know (Minnesota)
4) Turbo: fp green Tial 38mm
Results 357 awhp 360 TQ @18 psi Mustang Dyno