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Saturn Sky Redline Combustion Chamber

Saturn Sky Redline Combustion Chamber
Red-Hot Roadster - 2007 Saturn Sky Red Line
A look at the combustion chamber shows a fairly standard four-valve setup with centrally-mounted spark plug, but peeking through on the left is the tip of the SIDI system's fuel injector: a breakthrough in more than one way. "SIDI is effective in cooling the charge because the energy to evaporate the fuel comes from the gas phase in the cylinder. With port fuel injection, the energy to evaporate the fuel is coming from the port walls, so the heat is coming out of the metal. But with SIDI, we are injecting during the intake stroke into the gas phase so we are taking the heat out of the air. This helps cool the charge, which lets you up the compression ratio roughly 1 unit. A PFI engine at this level of boost would normally be in the 8s for compression," says GM's Groff. View Related Article
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Buick Lucerne Research
Buick Lucerne Finding a fuel efficient automobile today is easier than ever. Check out the Buick Lucerne buyer's guide providing information on car specs, reviews and fuel economy. The 2010 Lucerne is available with the following engine options: V6, V8, and has a 5 star frontal impact rating for the driver and a 5 star frontal impact rating for the passenger. Other similar vehicles are the Pontiac G6 and the Chevrolet Camaro.
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