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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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I see a discrepancy in deck height, side-to-side, with one bank having more than the other.
Excessive deck heights invite detonation, especially at full load, WOT with slightly lean AFR's for sustained high RPM operation. Too much fuel/air mixture is left at the circumference of the piston domes that tends to spontaneously ignite approaching TDC and the evidence was clear in the forensics. Hemispherical-head engines have little natural swirl and poor squish properties which do not tolerate such conditions as well as other type engines.
In other words, the failure occurred from the combination of factors.
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