Hemi Advantages
Hemi surface area is smaller than that of a flathead engine, so less heat escapes during combustion – and hotter fuel burns better. And because they're positioned on opposite sides of the chamber, the Hemi valves can be bigger than on previous models, which put them side by side.
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The word "hemi" is a shortening of the word "hemispherical," and as it relates to engines, means a type of engine that has a hemispherically shaped combustion ...
Jun 23, 2020 · The Hemi engine is named for its hemispherical cylinder head. It provides an efficient combustion chamber with an excellent surface-to-volume ...