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.
What is the difference between a Hemi and regular engine?
HEMI loses less heat, allowing for higher pressure, higher heat and more fuel combustion. The HEMI design places angled valves on either side. Previous designs placed valves in a single-file line, which limited each valve’s potential size. With valves on either side, there is more room for valves to be larger.
What does 5.7 liter Hemi mean?
Birth of the HEMI
The Chrysler HEMI engine had a displacement of 331 cubic inches (5.4 liters), so it is known as the “331 HEMI.” These days, 180 horsepower sounds like nothing. But in 1951, 180 horsepower was unheard of. It was an amazing amount of power for the day, and it fueled the “HEMI legend.”
Is a Hemi engine faster?
The most important thing about the HEMI engine is its combustion engine, which is the main reason for its high efficiency. The chambers are the reason that the HEMI engines can produce so much power. The main power lies in the head of the cylinder where the spark plug is located.
Photo in the article by “Wikipedia”