O2 sensor experts plz

[JShadzi at aol.com]

Correct me if I'm wrong here, the knock sensor is a piezo electric device 
that, when sensing 5-10khz resonance in the block, will output a voltage.  
What I want to know is, how much voltage to retard how much timing?  If 
anyone has any of these specs, I would be very interested.  I am working on a 
timing retard device based on boost for NA cars.  
TIA,
Javad
80tq.com