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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.
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 .
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.
Straight-five engines typically use a firing order of 1-2-4-5-3, in order to minimise the primary vibration from the rocking couple. Straight-six engines typically use a firing order of 1-5-3-6-2-4, which results in perfect primary and secondary balance. However, a firing order of 1-2-4-6-5-3 is common on medium-speed marine engines.
The 400 cu in (6.6 L) B engine was introduced in 1972 to replace the venerable 383, and were power-rated via the net (installed) method. Chrysler increased the bore size of the 383 to create the 400. Its bore of 4.342-inch (110.3 mm) was the largest used in any production Chrysler V8 at the date of its introduction.
Typical firing order of 1-5-3-6-2-4 3890-litre MAN B&W 6S60MC marine diesel engine If an appropriate firing order is used, a straight-six engine has perfect primary and secondary engine balance . The primary balance is due to the front and rear trio of cylinders moving in pairs (albeit 360° out of phase), thus canceling out the rocking motion ...
[1] [2] Originally displacing 172.6 cu in (2.8 L), it was stroked to 184 cu in (3.0 L) and ultimately to 195.6 cu in (3.2 L) in 1952. This engine was redesigned as an OHV for the 1956 model year, [ 3 ] but the flathead version reemerged in 1958 as the economy engine for the "new" Rambler American and remained available through 1965. [ 3 ]
The 477-cubic-inch (7.8 L) 477 was released late in the 1940 model year, replacing the 451. It was the largest in the GMC straight-6 line until it was replaced by the 503 in 1950. It shares the same 5 inches (130 mm) stroke as the 426 and 451, with a 4 + 1 ⁄ 2 inches (110 mm) bore. It produced a maximum 154 hp @ 2600 rpm and 385 lb•ft ...