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Less heat yes, but CFM is the problem (would require a lot of throttle with that kind of timing to produce 20 hp). The same reason 1600*F egt at part throttle does no harm, but WOT at those temps are on the threshold of melting engine parts, especially in a forced induction app.
Geometrically there is little mechanical pressure/energy extraction taking place at that crank angle. 10-20* ATDC is a common window for peak cyl pressure.
If the pressure curve didn't resemble a sine wave that number would probably be different.
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