Does anyone know the point at which the factory O2 Sensor "switches"?? This is the first rotary that i will be tuning on and i want to replace the factory O2 Sensor with a wide band and i will be using the programable output of the system to replace the factory narrow band sensor. Just wondering if anyone knows at what point they "switch"?? Normally its 14.7.......

 

Most people ditch the factory O2 sensor when going to the PowerFC. Car actually runs better without it. Not to mention if you use recalc base on the PFC you can't use the O2 sensor feedback.

Also, many widebands don't like going in the factory O2 sensor position. At Fighters we've tried that a few times with different widebands - they overheated and errored out. Best spot for a wideband on the FD is at the end of the factory downpipe.

Dale

 

about 450 mv is the normal switch point on any narrowband... but at idle on an Rx-7 it's different because of the air pump