romandian

i have tuned quite a few cars with narrowbands before cheap electronics became available. it will be different on every setup, you have to take the stock reading as a baseline and go from there. you also need an acurate meter. this is for wot. i would not trust pt/ol measurements, unless you take the trouble and construct a table with baseline readings.

Tiggerwelder

I made adjustments on a carbureted Road Racing car based on a Narrow band O2 sensor. Got the mixture lean enough to show on the gauge on the local drag strip. Only a few laps on the Charlotte Motor Speedway Roval and I burned a piston. This was not a modern fuel injected engine, but still. If you aren't using a Wide Band, you are begging to rebuild!