Brad,
I will look at the article and my original draft and notes. Some things get editing for space and may have had something like that happen.
Usually the the 90% of stoich is a good starting point for max power. But how good the base fuel is that the ethanol went into and gown efficiently the engine can use the fuel matters too.
The track testing was done on a low compression stock bottom end 440 with aluminum heads and a custom solid lifter cam. Certainly not the best quench I have ever seen to help with efficiency.
Keith