Imperial retained the FirePower design and name, but DeSoto redesigned the Hemi to create FireDome, while Dodge made the Red Ram engine. The engine saw different designs depending on the sub-brand producing it. The 5.4-liter engine had a power output of 180 horsepower, which was impressive for the time. The First Generation – FirePowerĬhrysler developed the first Hemi engines for use in the Republic P-47 Thunderbolt WW2 airplane, but the first commercially available Hemi was built in 1950 under the name FirePower. The downside of the design is that it only allows two larger and heavier valves, so multi-valve setups are not an option. The name Hemi is actually an abbreviation for hemispherical cylinder head – Hemi head design that creates a very efficient combustion chamber, minimal heat loss, and great surface-to-volume ratio. Development Of The 5.7 Hemi Engineīefore we get into the more serious issues regarding the reliability of the 5.7 Hemi, I think it’s a good idea to talk a bit about the original Hemi engines and how the design developed through the year. When we also take into account the general reliability of the Ram trucks they’re installed in, you shouldn’t expect more than 200,000 miles from a 5.7 Hemi as long as you dodge the large repairs. Some owners have crossed over 300,000 miles with it, while others experienced serious issues within the first 100,000 miles. The reliability of the 5.7 Hemi is questionable. The 5.7-liter model has certainly made its mark on the automotive industry, but in this article, we’re going to find out just how good of an engine it is. The most iconic cars from the ’60s and ’70s have used the Hemi: Dodge Charger & Challenger, Plymouth Superbird & Hemi ‘Cuda, Jensen Interceptor, and many others. The Chrysler Hemi engines are arguably the best-known engine series in the world.
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