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The Chrysler B and RB engines are a series of big-block V8 gasoline engines introduced in 1958 to replace the Chrysler FirePower (first generation Hemi) engines. The B and RB engines are often referred to as "wedge" engines because they use wedge-shaped combustion chambers; this differentiates them from Chrysler's 426 Hemi big block engines that are typically referred to as "Hemi" or "426 Hemi ...
Chrysler used a 14 mm (0.55 in) spark plug, rather than the typical 18 mm (0.71 in), in an effort to fit it as centrally as possible in the combustion chamber. [1] The intake and exhaust valves were the same size as the 426's, [6] the 2.25 in (57 mm) intake canted at 15° from the bore centerline, the 1.94 in (49 mm) exhaust at 6°. [6]
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.
Crate engines are often seen as an economical and more reliable solution as opposed to engine overhauls or custom builds. Such engines are built by specialist engine builders, working in clean and well-equipped workshops, rather than general purpose repair garages. Crate engines may be either brand new, or substantially rebuilt.
While Tom Hoover developed the 426 Hemi engine, cylinder heads can be interchanged between specific engines. The development team at Chrysler tried using wedge cylinder heads at first. Horsepower was recorded at 490 base horsepower. When swapped with the hemispherical heads, the engine immediately produced 550 horsepower. [1]
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.
In this way, the "Hemi" moniker was used for the same kind of marketing cachet as Chrysler's 1950s-1970s Hemi V8 engines. The Hemi-6 valves are angled apart (splayed) 18 degrees (included angle) along the crankshaft axis, and the intake valves are as large as 1.96 in (50 mm). The 6 intake and 6 exhaust valves open slightly towards each other ...
A total of 1,907 A12 M-code 440 Six Pack 1969 1/2 Dodge Super Bees were produced. This option fell half-way between the standard engine and the Hemi as a US$463 option. The 1969 model year included the base 383 Magnum, 440 Six Pack, and the 426 Hemi. The 440 Magnum (4bbl) was reserved for the Coronet R/T.
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