:confused: I'm a little confused about how the O2 sensors figure into this? O2s are not used during WOT, but N2O is only sprayed at WOT. I was thinking that WOT fueling would be achieved from the tuning tables.

O2s are cancelled at WOT. But that doesn't mean their values are not stored. O2s affect the Long Term Fuel Trim. When someone goes into WOT, the O2s are cancelled and the computer reads a Stored Value... the injectors don't just shoot unvalidated fuel at WOT. Stored Values are affected by LTFT, any air leak past the MAF, Left/Right BLMs, etc. If the O2s are lazy or out, it will not calibrate the correct stored value and the injector pulse width becomes questionable.

So, if the O2s are in good shape, then the LTFT should be fine with moderate blasts of N2O. If one or both are either lazy or stuck, then the LTFT will not be correct and an improper quantity of fuel will be sent due to the stored values. O2s are still read at WOT, but disregarded by the PCM. If you WOT, your O2s should read .910-.940... they do not blank out. If you are calibrating N2O with a wet system, then you have the option of jetting your fuel and monitoring your O2s to .925-.980

Good question :)

Tuning Tables = Stored Values with the difference being that one is static and the other is dynamic. You can adjust your tuning tables. My question is, are the tuning table adjustments EEPROM or does a battery disconnect reset the values. Hmmm.

would it be MUCH safer/easier for me to just forget this cheap dry kit ($275 for NOS kit 5176 and a MSD window switch) and buy a basic NX wet kit on down the road?