Join Date: Dec 2015
Location: Central Alabama
With HPTuners and a wideband, you can optimize your setup for whatever flavor fuel you like. Even easier if you tune in lambda like I do.
Canned tunes are a bit different. Most seem to be optimized for 91 octane.
Only benefit from octane above 91 is the ability to run more timing. More timing without knock = More power.
For example, on a 2.8 pulley with E10 93, I could consistently run 17° of timing WOT, on E85, I could run 25°. Netted a 17whp gain on the dyno...