Are the FP3 AFR numbers relative or absolute? For example, is "14.7" the "lambda = 1" point regardless of fuel type? Or is it an absolute 14.7:1 ratio regardless of fuel type?

 

Lambda is always different for different fuels. Lambda = 14.7: air/fuel ratio for pump gas. Are you running something other than pump gas?

 

 

While the stoich mixture ratio changes with fuel type (i.e. 14.7:1 pure gasoline, 14.4:1 for 10% ethanol), lambda always equals 1 at stoich.

That said, my question was does the Fuelpak FP3 interpret Lambda = 1 as a reading of 14.7:1? In other words, if you were running say 10% ethanol at 14.4:1 and Lambda = 1, is the FP3 still going to show a reading of 14.7:1?