"Slick" -
MSD Engine Knock Alert, # 8964 (
link to MSD
A small sensor screws into the block replacing a water plug. Wiring goes into the drivers compartment to a device about the size of a PDA. It displays a range of lights and gives an audible alert when the sensor detects vibrations associated with detonation. Both detection sensitivity and audible volume are adjustible. It took a little time and experimentation to adjust the sensor for my engine. I don't know that this thing is perfect, but it sure beats what I had before - nothing.