no wideband, just reading plugs. if the plugs stay clean and i can get the tune good enough that it drives well in all areas of throttle openings then i'm happy.
Tune the car to run well. Use the O2 meter for information, not final decision making.
Don't lean to heavly on the O2 meter for idle information with a big cam. Remember what it is reading, its not air to fuel ratio.
Yes, I even addressed this several posts ago:
Sure, I am aware of misfires causing artificially lean readings due to unreacted oxygen in the exhaust.
Whatever the actual AFR is, I set the mixture screws for best idle which always turns out to be 13.8 on the meter and no eye-watering exhaust.
The car ran very well when I put the carb on with the initial tune. The problem is that it was pig rich, wasting gas and darkening plugs.
Hence my struggle to get it leaner on the meter AND running well. The butt-dyno isn't sensitive enough and the nearest strip is 90 miles away...
