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Mopar
Information: HomeChrysler,
Dodge And Plymouth Engines5.7
Liter HEMI |
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Why a HEMI®? |
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In 1951, Chrysler Corporation
introduced its entry in the post-war horsepower race, a V-8 engine
designed with hemispherical combustion chambers. Quickly dubbed the
HEMI®, its power and efficiency made it an instant favorite for all
sorts of motorsport vehicles. Although reluctantly retired in 1959
due to high manufacturing cost, the HEMI design was still
unsurpassed. In 1964, NASCAR competition sparked the HEMI's return,
and it has remained available for motorsport use ever since. Now, 50
years after the original, there's a new HEMI whose efficiency and
power make it ideal for today's needs.
In 1951, we said:
"The secret of the FirePower engine lies in the Hemispherical
Combustion Chamber, developed and perfected by Chrysler Engineers."
This type of combustion chamber is used in aircraft engines, and it
has been used in several expensive, low production cars of foreign
make.
The FirePower engine not only produces more power than any other
passenger car engine in the world, but it develops more power for
its piston displacement than any competitive engine, which is
conclusive proof of its efficiency.
A specially printed Chrysler brochure explained that engines have to
breathe just as animals do, inhaling a combustible air-fuel mixture
and exhaling the exhaust gases after combustion. The easier the
engine breathes, the greater its volumetric efficiency and the more
power it produces. The hemispheric combustion chamber design of the
1951 FirePower engine allowed large valves to be located across from
each other instead of side-by-side, improving flow and allowing
larger valves.
The design of the hemispherical combustion chamber allowed more
complete burning of the air-fuel mixture, with flame from the
central spark plug kept short, direct and evenly distributed. An
efficient engine minimizes heat loss; heat is energy.
Now, we say:
"Our new
5.7-liter HEMI V-8 is an elegantly simple design that delivers
the power and fuel efficiency that today's customers desire."
The breathing and combustion advantages of the HEMI remain
unchanged; the same laws of physics and thermodynamics still apply.
The new
5.7-liter HEMI engine lets the superiority of the HEMI design
benefit from the many advances in engine technologies over the past
50 years.
Among them:
Aluminum cylinder heads to reduce weight, Fuel injection and
electronic throttle control to achieve more precise air/fuel
mixtures, Two spark plugs per cylinder and coil-over-plug ignition
technology to improve the HEMI's famous combustion efficiency still
further, High-mounted camshaft, Rocker arms with greater stiffness
and low inertia .
The result now, as in 1951, is an engine with class-leading
performance. |
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Source Of
Information: DaimlerChrysler |
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