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Other manufacturers, adopting DI technology on existing engine displacements, are achieving improvements in both power output and increased fuel efficiency while reducing emissions.
With CAFE '16 looming, I suspect we'll see decreased engine sizing (generally) while maintaining roughly-current power-to-weight levels but with improved mpg ratings. With an emphasis on Curb Weight reductions (where possible) through the use of more High Strength Steel and other "advanced" materials, the performance should stay "constant" while their efficiencies improve...markedly.
By '16, we're going to see powertrain technologies we do not currently "enjoy": more hybrids (both plug-in and e-Assist-like), diesels, electrics, and who knows what..."interesting times" await. The Gen-5 Small Block is only the tip of the iceberg...a greatly anticipated "tip" for many of us.
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