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Strokes chin. My 417 is at 9.5:1 cr with WCCH Cadillac LSA heads. And my cam is a 236/245 .617/.612 on a 114. Just for reference. About 1 year ago Conp had a bad batch of cams that went out. I got...

A long shot but a flat cam could cause this. Too much Dynamic Compression, or collapsed exhaust lifter. Basically anything that raises the moving compression in a cylinder. It doesn't miss or...

^ you wouldn't happen to have the cam specs by chance would you? Even with a broken piston or something to that degree, 8 degrees it should not knock at all.

And you're sure the knock is audible?...

Ever done a case relearn? Sounds like the overall timing may not be quite right. For only 9 pounds of boost and that sort of compression you should be able to run 16 without it knocking. Especially...