From what I've read, too hot of plugs can cause that. Low octane causing pinging, pre-ignition, can cause that. Some say running too lean causes pinging. I'm sure timing plays a part too. High compresssion pistons cause it too. Pinging blows holes in piston. New cars use ultra sonic mics to alter timing, EGR, perhaps fuel to cool thing off a littlt to prevent pinging on low octane fuels.
I had a 62 Jag, 9.5:1 compression,that needed high octane leaded gas or it would ping. I had to retard the spark to lessen the pinging. I let the car sit. Sold it 11 years ago for 5 times what I paid for it.
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Today's Featured Article - George's Fordson Major - by Anthony West (UK). This is a bit of a technical info to add on to the article about George's Major in the "A Towny Goes Plowing" article. George bought his Major from a an implement sale about 18 years ago for £200.00. There is no known history regarding its origins or what service it had done, but the following work was undertaken by Harold alone to bring it up to show standard. From the engine number, it was found that the major was produced late 19
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