Ignition retard knock sensor.

[xxalexx at ix.netcom.com]

> I have schematic of orig Carter knock eliminator.  Understand that each
> engine has unique acoustic profile that may require filtering to be
> effective.  I applied MSD knock detector to my Z on DynoJet to no avail.
> 
> Better design uses DSP customized to engine.
> 
I was working at Carter during development. circa 1978
Most was done in lab with freq. sources, I do not recall testing it 
on dyno.  and have forgot the project engineer name. but he looked
like Elton John. 
alex