Originally Posted by hrk

I talked to a Motec guy, who should know what he was doing tuning those WRC cars and he pretty much downplayed knock sensor saying that every time they change something in the car, the frequency the sensor looks for when knocking changes too and that causes a lot of false alarms or overreacting. And they do test a lot, even different exhaust changed the way knock sensor worked.
He did not treat knock sensor as tuning device, more like a suggestion.

hrk