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Why Is A Single Spark Plug Centered In A Combustion Chamber?

C
Cycle World

141 Views • Sep 28, 2018

Description

Cycle World Technical Editor Kevin explains the advantages that a four-valve combustion chamber—two intakes, two exhausts—has over a two-valve chamber—one intake, one exhaust—particularly regarding the centralized location of the spark plug as well as the flow area and weight of the valves.