hey guys, if I modify my stock tune, how much timing should i have at WOT for 91 octane?
I tried the canned 93 octane tune, but my fuel economy sucks with it.
What should the timing be at WOT with 91 ethanol free octane?

You're going to have to datalog and check your knock events. Start by ...

How exactly did it stop? Did you power cycle the tool while it was in flashing mode? You could have bricked the PCM.