I've seen several answers now that refer to "pinking" in what can only be a detonation context. I've heard of knocking referred to as "pinging," but never "pinking." So is this a typo that should be corrected, or is it a valid term?
The term bothers my American brain as well, but, just like putting a "u" into color to make it colour, there's no issue with it as long as it's basically English and people can understand what the OP means.– Pᴀᴜʟsᴛᴇʀ2 ModNov 28, 2015 at 13:58
It is a perfectly valid and common term.
Perhaps this is a UK v US thing. Certainly over here, it has been called Pinking since time immemorial.
I had always taken it to be onomatopoeic. Pinking describes the sound much better than pinging.