Bolt-Ons Help a Saturn Sky Red Line Prove it Has More in Common with the C6 Than Just its Body Style

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2009 Saturn Sky

Brendan Moran from GM High-Tech Performance: Thankfully the engineers at GM did their homework before adding boost to the Ecotec mill. Instead of simply adapting the 2.4L mill in the naturally aspirated base model, the Red Line features the LNF Ecotec 2.0t. Cranking out 260 hp and 260 lb-ft at the flywheel, the 122-cid four-banger extracts an amazing 2.1 horsepower per cubic inch of displacement-making it GM's highest specific output engine ever. The engineers were able to achieve this by combining advanced technologies such as a dual-scroll turbo, variable valve timing, and direct injection. Working in harmony, the dual cam phasing complements the turbo system by optimizing valve timing at lower rpm for faster turbo spool and quick torque, while utilizing the injectors' efficient delivery to enhance piston cooling. "There is virtually no lag with this system," said Ed Groff, Assistant Chief Engineer at GM. "Throttle response is immediate. The engine acts like a larger displacement engine."

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