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2JZ GTE Audio Knock Detection Sensor placement

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Anyone have some good suggestions for placement of audio knock detection placement? I’m running 2 upgraded Bosch sensors in factory location and wanted to see where people were placing a 3rd sensor to listen audibly for knock?

Car is single turbo now if that helps.

I usually stack the knock sensor for the knock ears on the to ECU knock sensor, this means that I am hearing the same noise that the knock sensor is reading.

The knock sensor is quite buried under the intake manifold and I’m looking for a quick spot to use the audio knock detection sensor. Other than doubling it up under the manifold…

I don’t know that I would have enough stud left to double up anyways.

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