You should be more interested in the AFR or Air to Fuel Ratio,
If you want to play and tune yourself you can get a Wego III from
Daytona Sensors LLC - WEGO III Wide-Band Air/Fuel Ratio Tuning Aids put an 02 sensor bung in the headers, with the caps so when you are not sampling they are out of the way,
It will give you a digital readout of the AFR which lets you know if you are running rich or lean or on the number you want.
If setup right you can run clean and make good power.