MX-5 Miata Mazdaspeed L4-1.8L DOHC Turbo (2004)
Downstream HO2S graph line example 1
Equation
RATIO = 26 inversions (upstream HO2S inversions) + 7 inversions (downstream HO2S inversions) = 3.7 (good converter)
Downstream HO2S graph line example 2
Downstream HO2S graph line example 3
Equation
RATIO = 26 inversions (upstream HO2S inversions) + 19 inversions (downstream HO2S inversions) = 1.4 (bad converter)
