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The 1973–1974 L82 was a "performance" version of the 350 that still used the casting number 624 76cc chamber "2.02" heads but with a Rochester Quadra-jet 4bbl carburetor and dual-plane aluminum intake manifold, the earlier L46 350 hp (261 kW) 350 hydraulic-lifter cam, and 9.0:1 compression forged-aluminum pistons producing 250 hp (186 kW ...
The newest American high-performance pickup truck since the 1989 Shelby Dakota, the 454 SS was a 1 ⁄ 2-ton C1500 powered by a 230 hp (172 kW) 7.4 L V8. Deriving much of its design from the Sport Equipment Package, the 454 SS was distinguished by a nearly monochromatic black exterior, gloss-black grille (with red-trim badging), and body-color ...
The firing order of older big-block engines is 1-8-4-3-6-5-7-2 [62] while Vortec 8100's firing order is 1-8-7-2-6-5-4-3. Other upgrades of Vortec 8100 include a new 18-bolt head bolt pattern, longer connecting rods, different symmetrical intake ports, different oil pan rails, and the use of metric threads throughout the engine.
As tested by Popular Science in 1973, a K5 Blazer with the 175 hp (130 kW) 350 V8, automatic transmission, and full-time four-wheel-drive accelerated from 0–60 mph (97 km/h) in 22.5 seconds, with an observed fuel economy of 9.648 mpg ‑US (24.38 L/100 km; 11.587 mpg ‑imp) at a steady 45 mph (72 km/h). [10]
6.2L fitted to a 1987 HMMWV. The original 6.2 L (379 cu in) diesel V8 was introduced in 1982 for the Chevrolet C/K and was produced until 1993. The 6.2L diesel emerged as a high-fuel-economy alternative to the V8 gasoline engine lineup, and achieved better mileage than Chevrolet's 4.3L V6 gasoline engine of the 1980s, at a time when the market was focused on power rather than efficiency.
The stretchy fuel-pump timing chain was a minor problem in light of the other issues. Poor dealer service training only made all the problems worse. [8] General Motors also carried out several redesigns of the V8's heads, bolts, and various other parts, but by the time the engine was trouble-free the reputation damage had already been done.
The LU3 was used in the Chevrolet and GMC full-size trucks and vans, the Chevrolet Astro and GMC Safari vans, and the Chevrolet S-10 Blazer and GMC S-15 Jimmy. The LG3 was rated at 180 hp (134 kW) and 245 lb⋅ft (332 N⋅m) of torque. The LU3 was rated at 190–200 hp (142–149 kW) and 250–260 lb⋅ft (339–353 N⋅m) of torque.
For 1973, GM redesigned its medium-duty (Class 5–7) truck range for Chevrolet and GMC, slotted between 1-ton trucks and the Class 7–8 H/J and C/M heavy conventional trucks (designed by GMC). Designed by Chevrolet, the trucks mated the Rounded-Line cabs to a heavier-duty frame and a taller hood; with the exception of the steering column and ...