Independent cylinder knock control

[Frank F Parker]

> Would like to know more about these meters. Worse comes to worse I'll 
> purchase a set of LEDS and a an IC to drive them. As for mounting it to the 
> lower engine - this is a 5.0 Ford - no "stock" mounting boss exists.. I've 
> got a 351W n the stand - I'll examine it and look for likely spots but I'm 
> betting there won't be an easy one. Duttweiler told me to use the back of 
> the head and provided a block of threaded aluminum to assist me in bolting 
> it up, I used the front of the head on an accessory stud. I'm not running 
> much advance and it does retard - pulling it off allows knock - rock and a 
> hard place I guess. This is why I want to monitor it - to try and get an 
> idea as to how much false knock it's getting. DFI provides no adjustment to 
> the sensitivity and no way to monitor it save through a laptop. I'm tempted 
> to buy one of the "boxes" available to monitor it but they're not cheap and 
> I'm fairly certain their simple inside...

I do not know the Ford block, but get the sensor off the head. It will
never work correctly up there. I would think you could find some place
you could tap on lower block. The meters are available from ANS for $90
@ 708-450-1095, I assume including a gm sensor but i have no direct
knowledge of their meter. I am pretty sure the GM sensor is high impedance
and has a output in the volt range. Do not know if ANS meter uses any sort
of bandpass filter in 5-8 KHz range to filter signal before using , I 
assume, either a op amp or diode before running to meter.
Could also get whole gm system from junk yard and use output from gm
knock box to a meter of some sort. 
If you are using current sensor with DFI, could build a op amp as hi Z
buffer and then run to homebuilt meter.

Frank Parker
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