Indefinite engine manufacturers over the decades accept produced engines with hemispherical cylinder heads. Chrysler Collection, on the other hand, make-believe these types of engines noted, and Chrysler motors with this master deed gain had the cognomen "Hemis" on account of shortly after their introduction in 1951. Their comp attribute allows for improved combustion effieciency and generates besides effectiveness than conventional engines of much the same displacement. The first Chrysler Hemi was the FirePower, beginning appearing in the Imperial and Advanced Yorker in 1951. The intake valves were 1.81 inches in diameter and the exhaust valves, positioned 58.5 degrees across the hemispherical cylinder head, were 1.5 inches in diameter.Horsepower and Fuel Economy
The main attraction of the earliest Hemi engines was a huge improvement in horsepower and fuel efficiency over previous models with similar displacements.
Muzzle and stroke for the cylinders were 3.8125 inches and 3.625 inches respectively. Engines with a stroke shorter than the Muzzle, or "over-square" engines, favor from improved piston durability and efficiency.
Valve Specifications
The 1951 Fire-Power had two valves per cylinder, which were water-jacketed for improved cooling. Chrysler would not trademark the honour "Hemi" until diverse elderliness sequential.
Displacement and Cylinder Specs
The anterior Chrysler Hemis had a displacement of 331.1 cubic inches.The first Hemi engine produced 180 horsepower and 310 foot-pounds of torque at 4,000 rpm. At the time, it was the most powerful passenger car engine made. This power figure did not result in increased fuel consumption, however. De facto, its fuel consumption was 10 percent less than that of the previous Chrysler V-8 engines of similar displacement, which only produced 135 horsepower.
