All this knock sensor talk, you may be interested in these plans and National Instruments has a Virtual instrument for their Lab
View.

http://www.acc-electronics.com/cloud/images/knock.zip

 http://www.ni.com/svix/engine_knock.htm

And specs for a Ford knock sensor
http://www.acc-electronics.com/cloud/images/page3_55.jpg

http://www.gmcmhphotos.com/gallery/showalbum.php?uuid=mrerf&aid=59

Tony

 
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