If you need these features, an aftermarket knock sensor system could be the way to go. No visuals, no connection to external ECUs, no datalogging. In this article I will detail how you can make this DIY knock sensor.
You can also choose to record the audio for playback later if you wish. This DIY knock sensor system outputs audio only in real time (there could be a small delay depending on your laptop, less than half a second in my experience). The DIY knock sensor system in the video can ( probably) be made by most people for less than $5. Video can’t be loaded because JavaScript is disabled: DIY Knock Sensor vs High-End Knock Sensor (Audio Comparison) () DIY Knock Sensor System vs High End Knock Sensor (Audio Comparison)
