hate to brake it to you but there is no way in hell you will see a difference on WOT,an a/f only mesures stoich conditions on wide open throttle, it will bounce from lean to rich the rest of the time on partial throttle. Ill tell you right now what it will do and save you the money. When you go WOT with that stupid thing in, it will go to the same DAMN bar it always does, guarunteed. In my GST i could raise boost by a PSI and have roughly the same stoich conditions assuming i had decent gas. Not untill i started to reach 2-3 psi difference did you start to lean the mixture out. that little resistor thing would just make you mad for wasting the money. Save it for a wheel bearing or somthing
If your really hung up on this considering buying an egt(engine gas temp) probe/guage, and see what the conditions change to with the resistor in, should give you any change in combustion conditions more accuratly. higher temps= leaner, lower=richer
phil