Thread: knock sensor
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beepbeep beepbeep is offline
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Join Date: Jun 2001
Location: Sweden
Posts: 5,565
Hmm...IMHO, the only bombproof way if detecting the knock w/o running into false positives is by using ion-sensing (thus measuring ionization current over plug gap after each combustion).

Those acoustic I came in contact with certainly work, but are often tuned to go "safe" as revs climb and pull timing/boost as they go deaf att higher revs. They usually do their stuff at middle revs where BMEP/torque is highest.

A knowledgeable and expirienced gentleman gave me a very usable hint when it comes to detecting knock on dyno (while mapping etc.) He used brake line tubing that he connected directly on the block on one side and to some sort of megaphone on the other. He claimed he could hear a single knock on this contraption.
Thank you for your time,
Old 04-24-2008, 03:35 PM
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