Independent cylinder knock control

[Frank F Parker]

> I've heard of the J&S system - it sounded great and if not for my DFI.... 
> Currently I use a GM sensor hooked into my DFI. I was told to mount it on 
> the HEAD (!) and am pretty sure I'm getting false knock from the 
> valvetrain. The sensor uses a small box from GM between it and the 
> computer. I've seen monitoring boxes for turbo GNs and would love to adapt 
> one for my system. Anyone have any ideas? I just want to know when it's 
> thinking it sees knock without having to use my laptop. I've done some 
> electronics work but it's been years and most of the little bit of design 
> knowledge I had has drained away.. TIA!
> 
The mounting on the head is a very bad idea. Use the stock GM location
on the bottom of block near oil pan rail. The gm box is a crude bandpass
filter and works poorly-gives alot of false retard. A number of companies
sell a monitor which appear to be a stock gm sensor connected to simple
dc meter thru a diode.
Frank Parker
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