Which outcome occurs for opposing pistons when the intake valve timing becomes excessively mismatched?

💡 Explanation

Reduced engine scavenging results from mismatched intake valve closing times in horizontally opposed engines due to ineffective Helmholtz resonance pumping; because cylinder pressure increases erratically, scavenging pressure is diminished, rather than increased vibration or mechanical failure. Therefore, lower exhaust power results rather than turbo failure.

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