High speed pinking

Guest

From the UK. My Pantera is fitted with Boss heads and suffers from pinking (pre-detonation) at moderate to high engine speeds under load. It is fine at low revs under load when you would normally expect it to pink. The ignition timing is set at 10 degree static and this advances to 30 at 4000rpm. Can anyone suggest a reason and a cure for this problem.

1/11/0312:22 PM

Original Post

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