Sir, you are incorrect. My timing retarded 6 degrees with this mod.
In theory you are correct, but the AFC does in fact advance the timing with high correction factors, and removing the HC's has more of a retarding effect than electronically altering the signal.
Three prominent tuners use the same method. Sometimes logic doesn't apply Chris.
My max HZ reading is 2400 now. It used to go to 2800 and then the A/f would get wacked. Somehow the lower HZ reading is tied into the lower timing. I'm not really sure why.
Besides, the timing light and the dyno don't lie. I have all the proof I need