wide band o2

[ViolatorTA]

I am now running mine in the pipe back under the passenger rear seat but the cats have been removed from my car.......or, I mean... they fell off about two years ago and I couldn't find them..............lol

[dfe1]

I did some testing a while ago with two WB sensors (connected to LM1s) one in front of and one behind the catalytic converter. The difference was .1 AFR at wide open throttle. At part throttle, the difference is greater because the exhaust flow through the converter is slower so oxygen content changes more. You can see a bit of the part throttle situation by monitoring front and rear NB O2 sensors.