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Plenum in air intake system of automobiles

Motor Vehicle Maintenance & Repair Asked by Isha Roy on November 27, 2020

What is a plenum? What role does it play in the air intake system of cars?Do naturally aspirated engines use plenum?

One Answer

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.

Answered by Solar Mike on November 27, 2020

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