CAM2,
I really don't think there is much different between what I said and what cardoc said.
The only difference is that Cardoc doesn't think the PCM pays attention during closed-loop operation (ie when it is not "ignoring" the O2 sensors) the rest of the stuff is almost identical (but I do think he missed the main point on borewash, but that isn't a major problem here anyway)
The computer uses the MAFS and the IAT in conjunction to determine how much air is entering the engine and how dense it is. This is all the time, not just at WOT. In essence, the engine thinks it is getting more oxygen than it is, so it puts in more fuel. Now, the the PCM does use the O2 sensors to bring the A/F ratio back into line, but now it will always run right on the very rich side of the acceptable range.
I never said I was against this mod (except in forced induction applications) in fact, I have seen several Mustangs get good gains from something this simple. My whole point is that it is not without its possible consequences. And I added that I personally would like better control over what is happening in the PCM, rather than tricking it. A Superchip alters the timing and fuel maps on its own to what they think they should be, so this would have the same effect on the superchip programming, only you would be more likely to hit the bad side effects because of the more aggressive calibration in the superchip.
The chip I mentioned I am working on getting, could prolly be best described as a "program your own" superchip (and it is a 4-position chip, great for you nitrous guys :D)
Stazi, can you get me some info on this A'pexi stuff?
