been playing with tunes on my PV. dont have access to a dyno just the seat of my pants.
my question:if 12.6 to 13.4 is optimum fuel range than why are all the supplied tunes 14.5?

 

Different ratios for different loads/rpms. Full power optimum might be in the 12.6-13.4 range you are referring to but that's way too rich for low load cruising areas. Cruising areas should be in the 14.1-14.6 range for fuel economy purposes.