Hey guys I am trying to figure out a good spot to mount my wide band in my 08 VMAX. The after cat o2 bungs on the stock exhaust are in a perfect location, but are just that after the cat. There is not much room from the manifold to the cat witch by the way are really small. I would like to run the WB in the exhaust all of the time. I plan to interface the 1-5V output of the LC1 to my AC pressure sensor for tuning with HP. I already have the custom PID’s set up for this and I have had good luck in the past doing this. But I am tempted to try running the WB in the after cat location and just delete the rear o2 sensor. But I am not sure as to how much this will affect the readings. I guess if I have to I could fab up some cat delete pipes. I am going FI real soon so I have to get this sorted out.

 

That's the only way it will work. The process going on in the converters is a different style of combustion to burn the unused hydrocarbons. It is still combustion, though, and combustion uses oxygen, and that is why after the cats will give a false O2 reading.