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The Hemi-6 is a pushrod O.H.V. (overhead valve engine), with combustion chambers comprising about 35% of the top of the globe. This creates what is known as a low hemispherical shaped chamber. In this way, the "Hemi" moniker was used for the same kind of marketing cachet as Chrysler's 1950s-1970s Hemi V8 engines.
Chrysler developed its first experimental hemi engine for the Republic P-47 Thunderbolt fighter aircraft. The XIV-2220 was an inverted V16 rated at 2,500 hp (1,860 kW). The P-47 was already in production with a Pratt & Whitney radial engine when the XIV-2220 flew successfully in trials in 1945 as a possible upgrade, but the war was winding down and it did not go into production.
2003–present: Hemi. 5.7L Hemi - The smallest modern Hemi engine, called the Eagle, introduced in 2002. 6.1L Hemi - A larger modern Hemi, 2004–2010. 6.4L Hemi - A larger bore modern Hemi engine, called the Apache, introduced in 2011. 6.2L Hemi - A supercharged Hemi engine, called the Hellcat, introduced in 2014.
A hemispherical head ("hemi-head") gives an efficient combustion chamber with minimal heat loss to the head, and allows for two large valves.However, a hemi-head usually allows no more than two valves per cylinder due to the difficulty in arranging the valve gear for four valves at diverging angles, and these large valves are necessarily heavier than those in a multi-valve engine of similar ...
The Nash-Kelvinator/Hudson deal was a straight stock transfer (three shares of Hudson listed at 11 + 1 ⁄ 8, for two shares of American Motors and one share of Nash-Kelvinator listed at 17 + 3 ⁄ 8, for one share of American Motors) and finalized in the spring of 1954, forming the fourth-biggest auto company in the U.S. with assets of US$355 ...
The wheelbase was extended 6.5 in (165 mm) by placing the front wheels forward and adding a new carbon fiber front fenders, hood, and grille. The engine is a 6.2-liter Hemi Mopar fitted with a Whipple 4.5-liter supercharger and tuned to Wegner Motorsports to produce 1,036 hp (773 kW). [162]