Hello,
For those of you who like to push the envelope we have an add on knock indicator. It piggy backs on you existing knock sensor or you can install a dedicated sensor. The unit has an internal bandpass filter that passes theknock frequency which when detected triggers an ultra bright LED for every knock event. There is also a version that has logic output for ECUs that are capable of knock control.
Regards,
Boris Mohar
Got Knock? - see:
formatting link