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The Plymouth Road Runner (or Roadrunner) is a mid-size car with a focus on performance built by Plymouth in the United States between 1968 and 1980. By 1968, some of the original muscle cars were moving away from their roots as relatively cheap, fast cars as they gained features and increased in price.
Engine choices were 440 four-barrel, 440 with three two-barrels (Six Pack), and 426 Hemi. Emission restrictions such as lower compression ratios and faster-acting choke operation lowered the base 440 output by 5 hp (3.7 kW), to 370 hp (280 kW). The 440 Six Barrel was down to 385 hp (287 kW), but the Hemi was still rated at 425 hp (317 kW).
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 ...
Forged connecting rods used the Wedge's 3 ⁄ 8 in (9.5 mm) hardware, as opposed to the Hemi's 7 ⁄ 16 in (11.1 mm), but would nonetheless have been considered high-performance parts. [ 1 ] The intake was to be a single Carter ThermoQuad , of greater flow than any previously used, on a dual-plane intake manifold, [ 5 ] while dual four-barrels ...
The 1968 model was available only as a two-door coupe, with two engine options, the base 335 hp (250 kW) 383 Magnum, and the 426 Hemi, rated at 425 hp (317 kW). [ 6 ] The Super Bee included a heavy-duty suspension, an optional Mopar A833 4-speed manual transmission , and high-performance tires. [ 14 ]
The 1970 Superbird was a Road Runner with an extended nose cone and front fenders borrowed from the Dodge Coronet, a revised rear window, and a high-mounted rear wing. The Superbird's unique styling was a result of homologation requirements for using the same aerodynamic nose and rear wing when racing the car in the NASCAR series of the time ...
The Plymouth Road Runner was introduced as a low-price, high-performance alternative to the GTX. Richard Petty won the Grand National championship in NASCAR in a Belvedere. The GTX came standard with the 440 CID engine and the Road Runner with the 383 Magnum, with the 440 six-barrel or the 426 Hemi engines optional.
In 1956, Plymouth introduced the Fury, a "halo" model in the Belvedere series that featured a high-performance 240-hp 303 cu in (5.0 L) V8, and gold-anodized trim on a body available in Eggshell White only and limited to the two-door hardtop. The Fury continued to be a special, high-end car until 1959, when it replaced the Belvedere as the de ...