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The GM Ecotec engine, also known by its codename L850, is a family of all-aluminium inline-four engines, displacing between 1.2 and 2.5 litres.Confusingly, the Ecotec name was also applied to both the Buick V6 Engine when used in Holden Vehicles, as well as the final DOHC derivatives of the previous GM Family II engine; the architecture was substantially re-engineered for this new Ecotec ...
The 2.2L L61 engine received some significant internal upgrades including a higher-strength Gen II block and revised cylinder head (enlarged exhaust ports) and camshaft design (increased exhaust valve duration). The engine also switched from wasted spark ignition to individual coil-on-plug ignition. Upgraded engine was controlled by new 32-bit ...
In 1980, the 425 was replaced with the L61, which was the same basic 472 family engine de-bored to 3.8 in (97 mm) but retaining the 472 and 425 engines' 4.06 in (103.1 mm) stroke for a total displacement of 368 cu in (6.0 L).
Also called the GM small corporate pattern and the S10 pattern. This pattern has a distinctive odd-sided hexagonal shape. Rear wheel drive applications have the starter mounted on the right side of the block (when viewed from the flywheel) and on the opposite side of the block compared to front wheel drive installations.
Also, the RS was replaced by the LS Sport line, which featured the new Ecotec L61 motors with 140 hp (104 kW) and 150 lb⋅ft (203 N⋅m) torque. These engines improved fuel economy, featuring the same displacement as the GM 122 Pushrod Engine (2.2 L OHV) while maintaining most of the power of the older LD9 motors.
The Family II is a straight-4 piston engine that was originally developed by Opel in the 1970s, debuting in 1981. Available in a wide range of cubic capacities ranging from 1598 to 2405 cc, it simultaneously replaced the Opel CIH and Vauxhall Slant-4 engines, and was GM Europe's core mid-sized powerplant design for much of the 1980s, and provided the basis for the later Ecotec series of ...
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