What is a plenum? What role does it play in the air intake system of cars?Do naturally aspirated engines use plenum?
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The plenum is usually an enlarged section feeding the 4, 5, 6, 8 or more ports so that there is less turbulence in the air as it enters the ports.
Too much turbulence and funny things start to happen like one cylinder runs rich compared to the others.
Solar Mike
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