12-09-2021, 09:32 PM
Martin, there isn't anything in your post to indicate what compression ratio you are running or how much advance is actually set. Given that you have set the latter 'by ear', you may reasonably not know this of course, but it would be fairly easy to check.
The noise of pinking is quite distinctive and although I've heard it described as the sound of a hammer hitting metal, I remember it more like the sound of a wine glass breaking. I say 'remember' as I haven't heard it since the 1970's, despite on at least one occasion running a ridiculous amount of advance in error. Modern fuel simply doesn't do it at any plausible advance setting for a road-going A7 (others please feel free to correct me!)
I would certainly check where your ignition is currently set as a point of reference, but my guess would be you are looking for something else.
Is the car new to you? Or has this noise developed over time?
The noise of pinking is quite distinctive and although I've heard it described as the sound of a hammer hitting metal, I remember it more like the sound of a wine glass breaking. I say 'remember' as I haven't heard it since the 1970's, despite on at least one occasion running a ridiculous amount of advance in error. Modern fuel simply doesn't do it at any plausible advance setting for a road-going A7 (others please feel free to correct me!)
I would certainly check where your ignition is currently set as a point of reference, but my guess would be you are looking for something else.
Is the car new to you? Or has this noise developed over time?