Detonation on 408 Stroker

He's in Europe so his 99 octane is approximately equivalent to the US 93 octane premium. Not race gas but not regular swill either.
Like I said I have a similar combination. Maybe not that light of a cam but still. This is great information here as when he said 99 octane I just assumed it was 99 octane LOL. I recently tried running mine on 92 non ethanol and it wouldn't shut off so I have to toss a gallon or two of 110 race fuel so it will turn off....