~20 number spread larger on the fuel @ 5psi has worked perfect for me...my a/f is still a little fat, but the plugs are very clean (ethanol doesn't color the plugs as easy as race gas). Some tunes that I have used:
63N/82F @ 5psi
73N/93F @ 5psi
82N/[email protected] 5psi
93N/[email protected] 5psi
102N/[email protected] 5psi
110N/[email protected] 6.5psi (went from 11.5 a/f on the other tunes to 12.5 a/f with this tune)
I am using e-100 now, but the tune didn't change from e-85...just cleaned up my a/f by .5