How do you dial in a VE table with a wideband O2 sensor?

The principles, from HP Academy and LSX Magazine:

• What VE is: the engine's actual pumping efficiency at each rpm and manifold pressure. The table tells the computer how much air it's getting at each point.
• Why a wideband: narrowbands only read accurately at stoichiometric; a wideband lets you see the real air-fuel ratio everywhere.
• The loop: log the commanded vs measured air-fuel ratio across the VE table cells you drive through, correct each cell by the error, reflash, and repeat until the error is small everywhere.
• Trims: if you tune from short-term trims, turn long-term trims off first, or the combined data will be wrong (HP Academy).
• Order: drivability areas first (idle, cruise, part throttle), WOT last (LSX Magazine). PCM of NC wants logs of 15–20 minutes covering cold start through WOT where safe.
• Target: closed-loop trims within about ±3%.

See tuning fundamentals.

Want to do it yourself? See who tunes it, and how to learn.