""13.2 AFR is pig-rich""

To determine what is rich or lean for each setup depends on a few items:
- gasoline, E10, E85/compression/octane
- no vacuum advance, or vacuum advance for cruise
- altitude/heat/humidity

All of these items can affect what each combo can run and because of the above, there is no single A/F number that is going to be rich or lean and work for everyone. If you change one or two of the above items, then the same combo may require a different A/F value.
For example, someone running gasoline and no vacuum advance should be able to run leaner than someone running E10 with vacuum advance.