Chrysler RB engine
| Chrysler B Engine | |
|---|---|
413 cu in (6.8 L) Cross Ram
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| Overview | |
| Manufacturer | Chrysler |
| Also called |
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| Production | 1958-August 1978 |
| Combustion chamber | |
| Configuration | V8 |
| Displacement |
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| Cylinder bore |
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| Piston stroke |
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| Cylinder block alloy | Cast iron |
| Cylinder head alloy | Cast iron |
| Valvetrain | OHV |
| Combustion | |
| Fuel system | |
| Fuel type | Gasoline |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Chronology | |
| Predecessor | Chrysler Hemi engine |
Chrysler B and RB engines are a series of big-block V8s introduced in 1958 to replace the 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" due to their hemispherical shaped combustion chambers.
Design features of the B and RB engines include 17 capscrews per cylinder head, a cylinder block that extends 3 in (76 mm) below the crankshaft centerline, an intake manifold not exposed to crankcase oil on the underside, stamped-steel shaft-mounted rocker arms (race versions used forged steel rockers), and a front-mounted external oil pump driven by the camshaft.
The 'B' series wedge engine was introduced in 1958 with 350 cu in (5.7 L) and 361 cu in (5.9 L) versions. The 361 would continue in production until the end of the series, albeit only for truck installation. The RB ("raised B") arrived one year after the launch of the B series engines, in 383 cu in (6.3 L) and 413 cu in (6.8 L) displacements. Unlike the previous B-engines, which had a 3.375-inch (85.7 mm) stroke, the RB engines had a 3.75-inch (95 mm) stroke.
For 1960, a "ram induction" system increased the 413's torque up to 495 lb·ft (671 N·m) on the Chrysler 300F versions.
The last 'B-RB' wedge headed engine was produced in August 1978, ending the era of Chrysler "big-block" engines.
All Low Block B-series engines have a 3.375 in (85.7 mm) stroke, a 9.98 in (253 mm) deck height and 6.358 in (161.5 mm) connecting rods, resulting in a 1.88:1 rod ratio.
The 350 cu in (5.7 L) B engine was, along with the 361, the first production B engine, first available in 1958. It had a bore of 4.06 in (103 mm). The 350 is classified as a big block engine. All parts except for the pistons are fully compatible with the 361.
The 361 cu in (5.9 L) B engine also introduced in 1958 was essentially the same as the 350 except with a larger 4 1⁄8-inch (100 mm) bore. In 1964, the Dodge Polara 500 came standard with a 315 bhp (235 kW) version of the 361 that had a four-barrel carburetor, dual-point distributor, and dual exhausts. Plymouth called their versions of the early B engine the Commando, variants of which included the Golden Commando and SonoRamic Commando. It produced 305 bhp (227 kW). DeSoto's B engine was named TurboFlash and produced 295 bhp (220 kW). The Dodge standard version was a 2-barrel with 295 bhp (220 kW) called the Super Red Ram with an optional variant that was called the D500 and produced 320 bhp (240 kW).
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Wikipedia