Hemi

Product

Contrary to popular belief, Chrysler Corp. did NOT invent the 'Hemi' engine. It IS the most well known version!

A hemispherical combustion chamber is a type of combustion chamber with a domed cylinder head. The hemispherical shape provides some advantages in an internal combustion engine. An engine featuring this type of chamber is known as a hemi engine, as with the Chrysler 'Hemi' engine.

More

Contrary to popular belief, Chrysler Corp. did NOT invent the 'Hemi' engine. It IS the most well known version!

A hemispherical combustion chamber is a type of combustion chamber with a domed cylinder head. The hemispherical shape provides some advantages in an internal combustion engine. An engine featuring this type of chamber is known as a hemi engine, as with the Chrysler 'Hemi' engine.

Hemispherical combustion chambers were introduced on some of the earliest automotive engines, shortly after proving the concept of internal combustion engines themselves.  Hemispherical cylinder heads have been used since at least 1901; they were used by the Belgian car maker Pipe in 1905 and the 1907 Fiat 130 HP Grand Prix racer. The Peugeot Grand Prix Car of 1912 and the Alfa Romeo Grand Prix car of 1914 both were four valve engines also, Daimler, and Riley were also using hemispherical combustion chambers. Stutz, beginning in 1912, used four-valve engines, conceptually anticipating modern car engines. Other examples include the BMW double-pushrod design (adopted by Bristol Cars), the Peugeot 403, and Miller racing engines, and the Jaguar XK engine.

 

Less