Originally posted by DemonSVT:
Once you removed all the cats the wideband for the most part read the exact same as it was directly out of the engine.
Except for the lag time in the A/F vs. RPM graph, from the time for the gasses to reach the back of the exhaust system. I dunno how fast the exhaust gas moves or if it makes any difference, but it seems to me (uneducated guess) that the closer you were to the exhaust valves the more accurate your A/F will be when plottd against RPM.
