From what my small brain can figure a narrow band 02 can only read 14.0 to 15.0 a/f other than that it only shows that it's richer or leaner but not how much. stoich is .5 volts That is why you must use a wide band to read air fuel ratios
Also and this is a big ALSO all racing fuels as in gasoline have different stoic values so a gauge set for 14.7 is not accurate for other fuels because the 02 reads lambda 1.0 as 14.7 a/f ?
Correct me if i'm wrong.
