Ford Taurus SHO
From Ford press: The foundation of the 2011 Taurus SHO is a 3.5-liter twin-turbocharged EcoBoost V-6 engine. This advanced powerplant generates anestimated 365 horsepower at 5,500 rpm and 350 ft.-lb. of torque at 3,500 rpm, resulting in significantly improved power, torque and fuel economy compared with larger, normally aspirated engines.
A key feature of this EcoBoost engine is gasoline direct injection. The direct injection of fuel into the cylinder during the intake stroke, as opposed to port-style injection to an externally mounted intake, produces a well-mixed air-fuel charge. Fuel vaporization during the intake stroke cools the incoming air, improving volumetric efficiency and lowering the likelihood of knock.
The results are improved throttle response, reduced cold start emissions and improved fuel economy. The cooled charge enables an increased compression ratio, improving efficiency at partial load, while the higher compression ratio allows for better volumetric efficiency under full-load engine behavior. Customers will experience naturally aspirated V-8 power without compromise to the V-6 fuel economy.
The 3.5-liter EcoBoost V-6 uses twin turbochargers as opposed to a single unit. The reduced size of each turbocharger results in reduced internal inertia, allowing this advanced engine to avoid the “turbo lag” often prevalent in earlier-generation turbocharged applications.
From the driver’s seat, the result is linear power delivery across a broad torque band from 1,500 to 5,500 rpm. Peak torque building quickly ensures responsive acceleration from a standing start.