For a better understanding of the how’s and why’s behind tweaking individual valve events Here’s a quick explanation of the four events in order of importance:
1. Intake Valve Closing (IVC)
This event has the most control over the powerband. We trade low- end torque for high-end horsepower when we close the intake valve later after BDC.
2. Intake Valve Opening (IVO)T.
4. Exhaust Valve Opening (EVO)
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