Message zoom on this forum, he's all over the WMI shit.
It explained to me what you do is get the afrs down to say 10.5 and inject, change nozzles blah blah with wmi till you lean it back up by 1 afr point, ie back to where you were before. Then advance the timing as you would with E85.
My lazy E85 blanket is 5 degrees at peak torque and about 7 up top. Then use a dyno to determine where on the curve you can improve.
He reckons WMI is on par with E85, however with wmi you lose off boost torque because you're not injecting it on vac (well you could).