Knock sensor on dyno

[Bruce Plecan]

What you call AE Enrichment noise might be trace detonation  (gm uses a
"burst knock table to cover this situation in some applications)
Grumpy


| Take a look at
| http://home.netcom.com/~bsundahl/knock/sound/KnockSounds.htm
|
| This shows some of the work that I have done on recording and analyzing
| the signal off of an Eagle Talon knock sensor.  The sensor does not
| seem to be "tuned" that I can tell, it's just a wide band microphone.
| I am assuming that the GM sensors are very similar.
|
| The Talon uses a fancy filter circuit inside the ECU to detect knock,
| but I have never been able to figure out exactly what it looks for
| in the signal.
|
| -Bill
|