Now that’s interesting. No knock? A number of years ago Mark Haibeck documented (in a presentation still on his website today) what he called “typical” knock for both “tip in” and “shift” related knock. I copied the attached charts from that presentation below. I still think we’re missing something here. I find a car with zero knock highly unlikely. Mine was like that when I first started tuning. When I changed out the knock sensor and we suddenly had knock back in the picture.
H
