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Originally Posted by arghx7
We'll have to wait and see about this. I'm sure they've figured out what buttons to push to lean it out and advance the timing, but beyond that we'll see how well the logic is understood.
I looked through it. Max estimated cat temp was 850C, which is totally unsurprising. You'd have to hook up a thermocouple to the cat to see how accurate their model is, but 850-950C is the max range you can operate a catalyst without excessive aging. If you lean out the engine for more power, the cat will deteriorate faster, although you'd probably never notice it in the real world.
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Another interesting fact was the stock enrichment at high RPM's, if it was not there more power could be made up top, the AFR where in the low 11's, could this be to protect the cats? or do you think it is only a safeguard built into the factory tune for reliability? Another aspect that I failed to bring up to this point, during the torque dip the actual AFR was 13.3 (kind of explains the advance timing in this area however), which correlates to the command AFR, if what John (visconti) said was true, what is the advantage of running a lean AFR during open loop, especially whe 12.5 produces the best power, if anything it is creating a hot spot in the rev range. Maybe I will take the EGT out of the evo to get some readings. I cannot log it as it is a cheap autometer gauge, but I could atleast observe the difference between the torque dip, and once the AFR get down to 12.5 like it should be.