Trying to pull timing back(HPTuners)
I have a 00 C5, everything except the trans parameters are stock. I'm wrapping up my nitrous install tomorrow(NX 150 wet blah blah) and I'm looking to pull some timing back. From previous experiences and searching I figure about -4 degress will be sufficient, I understand these cars have a base timing of 28 so that should land me at 24 degrees.
Now what I don't get is which table do I change? I want to say the "Main Spark Advance-High/Low Octane" but to be honest I don't know what the hell I'm looking at


