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This a warning: The answer is somewhat technical, so if you need to brush up on your automotive engine basics (as we certainly did), cruise on over to HowStuffWorks first. In 1951, Chrysler introduced a new line of V8 engines called the "Hemi." The name came from the cylinder heads, which had a hemispherical design. The design itself wasn't new, but it had never been used in a passenger car before. As TheHemi.Com explains, the Hemi engine differs from standard V8 engines in three main ways: - The hemispherical combustion chambers create better thermal and volumetric efficiency. Thus, the engine can create more power without increasing compression, which would entail
a higher octane fuel.
- Valves are placed directly across from each other, as opposed to side-by-side, to allow better intake and exhaust gas flow.
- The spark plugs are better positioned to provide maximum ignition combustion in the chambers.
A photographic comparison of the Hemi and other engine types might help explain the differences. If you really know your stuff, you can race through this incredibly detailed explanation. And if you want to get revved up about Hemis, check out Hot Rod Magazine for an article about a Hemi exhibit at the Walter P. Chrysler Museum. It might just spark your interest.
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