Ford 2.7-liter EcoBoost V6 deep dive - AutoWeek
Its architecture is different from Ford’s current line of 3. 5-3. 7 V6s, with square bore-stroke dimensions of 83 mm. The engine block--or at least its upper portion around the cylinder bores--is cast from compacted graphite iron (CGI). Ford says the 2. 7 EcoBoost is the first gasoline-fueled serial production engine with a CGI block. Compared to conventional cast iron, CGI provides substantially better tensile strength, 45 percent greater stiffness and twice the fatigue strength. It has more dimensional stability and better NVH damping qualities than aluminum, and while it’s heavier than aluminum, it’s much denser. The CGI casting basically follows the angle of the cylinders down to the crank journals and caps. The skirt and lower crankcase is aluminum--trimming weight where strength is less an issue--and bolts to flanges on the CGI upper. Two bolts in the four-bolt mains attach the caps to the CGI portion. The other two go through the aluminum ladder and caps to the CGI block. Other notable features include a plastic intake manifold and oil pan (for weight savings), a structural aluminum front cover (for NVH), a variable displacement oil pump (yielding reduced friction and better fuel economy), and a cartridge-only oil... Source: autoweek.com
