• The 1977 Oldsmobile 350 was an engine equipped in several Oldsmobile vehicles. These vehicles were part of the reason that Oldsmobile became the third best-selling automaker in 1977. Notable Oldsmobile vehicles produced in 1977 included the Cutlass, the Oldsmobile 98, the Toronado, the Omega and the Starfire. Several of these vehicles were offered with the 350 engine as a powertrain upgrade.
  
  

350 Engine

• The 350 engine was heavily modified when it was equipped in Oldsmobile vehicles in 1977. It was named as the "lightweight" version of the heavier 350 engine that was built from 1968 to 1976. The 1977 was made with bigger combustion chambers, smaller ports, an Exhaust Gas Recirculation (EGR) system for emission reduction and lower compression. It was also equipped with 1/2-inch head bolts that were commonly found on the more powerful Oldsmobile 403 engine.
  
  

Performance

• One of the vehicles equipped with the 1977 350 CID engine was the Oldsmobile Cutlass. It was a rear-wheel drive vehicle that came in a variety of trims. It was released as a coupe, a sedan and a wagon. The 350 engine was included as one of its optional powertrains. When it was equipped in the 1977 Cutlass, the 5.7L 350 engine was able to produce a maximum output of 170 horsepower at 3,800 rpm and a torque of 275 foot-pounds at 2,000 rpm. Its horsepower to weight ratio was 21.7 lb per hp, and its horsepower to fuel ratio was 29.6 hp per liter.
  
  

Engine components

• The 1977 350 was a naturally aspirated engine equipped with eight cylinders and hydraulic valve lifters. It came standard with 16 valves with two valves per cylinder. It utilized an overhead valvetrain (OHV) and had five main bearings. It was equipped with a Rochester four-barrel carburetor and had engine blocks and cylinder heads made of cast-iron. Its bore and stroke was 4.05 by 3.38 inches; the compression ratio was 8.0-to-1.