The Shadow Hawk can use any engine format it wants, so why was a diesel power plant selected? Because the Shadow Hawk needs to service three extremely different disciplines without one compromise, diesel power was the only engine with the horsepower and torque characteristics that could do so. Looking at diesel performance, remember that Audi and Peugeot's diesel-powered Le Mans racecars beat all of the gas powered competitors, combined, for the last four years straight. Performance, when speaking about engines, is a measure of its ability to produce usable power, and lots of it, at a usable rpm. The new diesels, with the recently rediscovered compound turbo charging, high-pressure direct-port fuel injection, and state-of-the-art computerized engine control, produce massive amounts of usable power and get greater fuel mileage in the process. The Shadow Hawk produces 1,100 horsepower and can still get greater than 20 miles per gallon; this is a feat that cannot be accomplished by any known gasoline engine. What makes the diesel power plant even more attractive is its ability to be just as drivable as a stock diesel while making these enormous power figures.

To make a monster like this reliable requires the bottom end to be stronger than normal. The Shadow Hawk uses an aerospace double-vacuum-melted alloy steel billet crank shaft and rods, special alloy pistons, with a proprietary partial vapor-deposition coating that dramatically reduces friction and wear. Other Physical Vapor Deposition (PVD) coatings are also used on the valve train and camshaft. PVD coatings increase the critical components service life and reduce friction increasing the engines overall efficiencies and power output. The push-to-pass technology has two missions: the first is to increase overall power with the push of a button and the second is to reduce emissions, with computer controlled actuation, at key moments, during normal engine's operation. This is an engine with no challengers.

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