When I last tuned my Vishnu stage 1+ on 93 Octane, I had Shiv try to push up to an 11.5 AFR and the ECU started pulling timing (read: knock activity). Now on my current setup I initially tuned at 11.4 AFR on 93 octane and then Martin at AMS dialed it back to 11.2-11.3 AFR and we only lost 1 whp on the dyno (i.e. no measurable difference). Unless you're going to run racegas, low 11's seem to be a good AFR to shoot for on an Evo running 93 octane. Not sure about 91 octane, but I'm sure someone here can chime in.

l8r)

 

Did you post your dyno #'s yet Ludi? Is the boost lag gone? let us know!