Specialized and extremely precise multi-hole fuel injectors are used to meter fuel and deliver it in a finely atomized manner. The cylinder head incorporates mounting locations for the fuel injectors – items that are typically mounted in the intake manifold on port-injection engines.
To accommodate the direct-injection system, the Ecotec 2.0L DI turbo has a unique cylinder head and intake manifold. To enhance combustion, the piston tops feature a dish shape that deflects incoming fuel toward the spark plugs. Oil-spray piston cooling helps reduce cylinder temperatures and promotes longevity by delivering pressurized oil that continuously lubricates the pistons, which reduces friction. Aluminum cylinder head with stainless steel intake valves and sodium-filled exhaust valvesĬomponents including the steel crankshaft and forged connecting rods are high-strength items that provide strength and enhance durability.Highlights of the Cobalt SS’s Ecotec 2.0L DI turbo engine include: Direct-injection technology works well with turbocharging and helps deliver a great balance of power and economy. Less fuel is required to produce the equivalent horsepower, especially at normal cruising speeds, of a conventional port-injection combustion system. With direct injection, fuel is delivered directly to the combustion chamber to create a more complete burn of the air/fuel mixture. Gasoline direct-injection technology helps the engine produce more power while maintaining lower fuel consumption. It produces 2.1 horsepower per cubic inch of displacement (130 hp / 97 kW per liter) and is the most powerful engine in the Ecotec family. The Cobalt SS’s Ecotec 2.0L turbo engine is the same that powers the recently introduced HHR SS. “With the Cobalt SS, fun is balanced with a serious degree of capability, on both the street and racetrack.”įeatures such as “no-lift shift” and other driver-selectable performance modes help the Cobalt SS achieve 0-60 mph in approximately 5.7 seconds and cover the quarter-mile in approximately 14.2 seconds, with minimal torque steer.
“Chevrolets are about fun and the SS models are the most fun of all,” said John Heinricy, GM Performance Division executive.
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of torque (353 Nm) with the standard five-speed manual transmission. The Cobalt SS is powered by a turbocharged and intercooled 2.0L Ecotec DI engine that delivers 260 horsepower (194 kW) and 260 lb.-ft. The engineers from GM told me that they designed the new turbo Cobalt “one step away from going for the kill.”įor street driving leave the stability control in normal mode and enjoy the comfortable race inspired seats which works great for daily driving and for the weekend warriors track events.
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There was a hint of under steer then the stability control would kick in and drag the rear brake and the rear end would begin to rotate around and give the driver a neutral feel. Most front wheel drive cars would have a tendency to under steer when pushed past the limit of adhesion. The car was very nimble and with a good power range and minimal turbo lag on the track. The stability control in the sport mode was fabulous. I would opt for the limited slip differential. You get a turbo charged front wheel drive car with launch control, stability control and no lift shift. It is the best bang for the buck in the low 20K range. GM’s new turbo charged Cobalt is a blast to drive.
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