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Gen V LT1 - Insider Look - 450 HP, 6.2L

By , Photography by Courtesy GM

Did you feel the disturbance in the Force a short time ago? If you did, it was a good thing. It's the future come knocking, with the release of GM's small-block engine, the Gen V LT1. With a nod to two earlier Chevy performance engines, this is the first V8 with direct injection. That means fuel is injected directly into the cylinder under very high pressure. Think of this as (dare we say it?) a hybrid between gasoline- and diesel-engine technology. GM is calling this spark ignition direct injection (SIDI). The 2014 Gen V LT1 still uses spark plugs to initiate combustion, but this configuration is sneaking up on diesel efficiency, with an impressive 11.5:1 compression ratio. The direct injection has been cleverly integrated into the existing LS-engine architecture, retaining what appears to be plenty of interchangeability between the Gen V LT1 and its Gen III/IV cousins. That's a good thing. What's most interesting is how impressive the cylinder heads look. No specs yet on the intake-port volume, but it appears to be in the LS7 range. The bore and stroke are typical of an LS3, with 4.065 bore and 3.62-inch stroke, displacing 6.2L (376ci). Then there's the variable valvetrain technology (VVT) that uses oil pressure to advance or retard the cam to improve combustion efficiency, power, and emissions. And don't forget Active Fuel Management (AFM)'formerly called displacement on demand (DOD)'in which the engine can instantaneously drop four cylinders and convert to a 3.1L V4 during cruise conditions. That promises to improve highway fuel mileage to 26 mpg in the new \'9214 Corvette. This is where the new Gen V LT1 will debut, but expect it to be quickly integrated into new Camaros and truck and SUV applications. We've come a long way from the 265 SBC, baby.

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