Cobb AP User's: What gauges do you have displayed on your AP and why?

Boost, Charge Temp, Long Term Fuel Trim, Ignition Correction 1, and Ignition Correction 3.

The LTFT was a crude means on monitoring how much ethanol was in the fuel and is weighted against the ignition correction performance to decide how "good" gas is. The ST was most prone to pre-igntion on cylinder one and four, so I watch 1 and 3 three to see the good and the bad.

The car will add or subtract upwards of something like 25% of fuel using the short term fuel trim to hit its target AFR. Watching it in real time doesn't tell you anything, it is most informative in datalogs as a sanity check. Same goes for watching the OAR; once it hits the desirable -1.00 then you're going to know more about the quality of gas by watching ignition corrections than waiting for the OAR to move after a pull.