Thread: K&N Air Filters
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Old 12-13-2009, 02:05 PM   #8 (permalink)
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WOT is normally a very bad situation. In ECU-controlled cars, enrichment happens, and the AF ratio is richened to the point where it's no longer being efficient. 80% seems to be the max throttle angle.

In carb'd cars, it just opens an enrichment circuit which is normally uncalibrated to a specific AF ratio, and dumps some fuel in there unmetered to aide in cooling the engine under high load.

Again, 80% (depending on carb config) is usually about the cut-off. In either event, K&N still doesn't make any of these claims on their own.
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