[Ed Wright]

13-1 is not lean at all "up there" at Denver. I would try 13.5-1. I'm surprised it likes 12.7-1 best at sea level. But, wide bands don't always give the same numbers. Be nice if they did. I bought a stand alone wide band set up so I could log both banks. Bought from the same people as the first. My original deal showed 12.9-1, the new one 12.5-1. Put it on Patterson's dyno with a wide band in each primary tube. Not that far off. Moved my original wide band to the other collector on the dyno. Both sides the same. In the car, one side still showed richer. Swapped sides with the original ECU wideband & the add-on, rich side moved too.