Has anyone logged the stock voltage of the stock primary Oxygen sensor ?

 

A standalone system like Daytona Sensors wego VI wide band set up with built in data logging is cool. Get a bung welded in and go for it. You can data long sensor voltage with a simple ODBII scan tool with data logging capabilities but the Daytona sensor system gives you a real time read out of A/F ratio and has a tachometer input as well.