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The 230 cu in six and 153 cu in four are thus essentially the same design, differing only in cylinder count. In the Chevy II the engine was branded as the Super-Thrift 153, [1] [2] while in the 1964 Chevy Van, it was called the High Torque 153. [3] Peak power and torque were 90 hp (67 kW) at 4,000 rpm and 152 lb⋅ft (206 N⋅m) at 2,400 rpm ...
It has four valves per cylinder, utilizes dual-overhead cams design, and features variable valve timing on the exhaust cam, a first for GM inline engines. When introduced, this engine's power was 270 hp (201 kW) at 6,000 rpm and torque was 275 lb⋅ft (373 N⋅m) at 3,600 rpm. 2003 saw a slight bump in power to 275 hp (205 kW), while torque was ...
The GM L3B engine is a turbocharged four-cylinder gasoline engine designed by General Motors. It is an undersquare aluminum DOHC inline-four displacing 2.7 liters (165 cid) and tuned for strong low-end torque.
Starting in 1979, a two-barrel intake fitted with a Rochester Varajet carburetor and dual take down exhaust manifold were used in trucks and vans. The "integrated" cylinder head and intake manifold claimed to have resulted in increased low end torque and fuel economy inclusive of a smoother operation, lowering NVH (noise, vibration, and harshness).
It offers the airflow of more expensive heads, at a much lower cost. It does, however, require a specific intake manifold (the L31 has four bolts per head attaching the intake manifold, as opposed to the "traditional" six bolts per head found on older Chevrolet small-blocks). Chevrolet's L31 was replaced by GM's LS-based 5.3L LM7 and 6.0L LQ4.
In 1966 the L78 was available exclusively in the intermediate line. For 1967 the engine was additionally available in Chevrolet's new pony car, the Camaro. The following year the motor became available in the compact Chevy II also. For the 1970 model year the 396 was bored 0.03 in (0.76 mm), resulting in a 402 cu in (6.6 L) engine.