Quote:

From what I have gathered, there might be a "range" to shoot for and then tweak from there.

12.5-13.0 WOT A/F's

This is my opinion as well.
Different combo's will use the fuel more efficiently, which allows a lean mixture for maximum power. Others don't atomize as well, scavenge/fill the cylinder, etc.

I think it is interesting to see tests, but I don't believe it will be the same answer for each application.

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1