Performance Cylinder Heads Valvetrains Dyno Tech Result
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As referenced in the story, this chart compared a typical trace for an intake valve's motion and the multiple excursions of pressure ("spikes") that occur in an intake path (cylinder head and intake manifold runner) prior to and during an inlet cycle. Note not only range of pressure (minimum and maximum values) but also nature of pressure history during intake cycle (crank angle from about 300-620 degrees as shown in illustration). View Related Article
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