[svxistentialist]

Superb information Tony. Nice test.

Trevor mentioned an interesting point; he seems to be of the opinion that the knock sensors, which are audio devices, send a signal. If I understand him right then possibly this signal is either measured in a select frequency range that mirrors the peak from in-cylinder detonation, or is closely filtered to only read or deliver pulses of a certain bandwidth or volume.

So what is relevant is how discriminatory they may be in relation to other noises such as the rotors meshing, or in our case a pulley not tight.

Can we derive any information on this?

Joe