http://forums.evolutionm.net/showthread.php?t=382625
Two major things AEM EMS holds over the stock ECU at this point: speed density, and adjustable base knock thresholds. SD is being tested already, but the knock stuff is probably more important for most people. Why?. Some engines are louder than others. OEM components have different harmonic resonances than aftermarket ones. Heck, some OEM components have different harmonic resonances than other OEM components!
I will paraphrase, because it is a long-ass thread. The ECU listens to the knock sensor and digitally filters out background noise as time progresses. Using some newly discovered tables, the values used to determine how loud (and at what rpm) this background noise is can be adjusted!
This is a major, major, major breakthrough. Many people have shied away from built motors on the stock ECU simply because they can be 'louder' than OEM motors. No more will this be the case, and those people will be able to spend the $1500 and hours upon hours upon hours they spent on playing with AEM and put it towards making their car faster in other areas!
Discuss.
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