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The VK engine (formerly known as the ZH) is a V8 piston engine from Nissan. It is an aluminum DOHC 4-valve design. The VK56 engine was originally based on Nissan's ''VQ'' V6 rather than the ''VH'' V8 used in previous Q45/Cima models. Changes include: a variable polymer intake manifold, newly designed heads, and a larger drive by wire throttle chamber. The intake manifold directs air through different paths at different engine speeds to optimise low-end torque or high-end horsepower. == VK45DE == The 4.5 L (4494 cc) VK45DE was introduced in 2002 and is built in Yokohama, Japan. Bore is and stroke is . Output is 340 hp (254 kW) at 6400 rpm with 333 lb·ft (451 Nm) of torque at 4000 rpm. Redline is at 6600 rpm. It has an aluminum engine block and aluminum DOHC cylinder heads. It uses SFI, has 4 valves per cylinder with VVT and features forged steel connecting rods, 4 one-piece cast camshafts, and an unusual variable-flow induction system optimizes airflow for low- and high-speed operation and low-friction molybdenum-coated pistons and microfinished crankshaft. Motorsport A flat-plane crankshaft version of the VK45DE was used by Nismo for Super GT races with the Nissan GT-R instead of using the GT-R's VR38DETT twin-turbo V6 engine. The VK45DE was previously used in Nissan's 350Z Super GT car in 2007, replacing the previous VQ30DETT used in that car. In race trim, the Super GT VK45DE produces and of torque. The engine idles at around 3500 RPM and is restricted to the above specified power output. Without such restrictions, the engine is reputedly capable of producing nearly . Nismo reasons that by using the engine, they eliminate turbo-lag, save weight and generally prefer the torque curve of the atmospheric V8. This engine is used in the following vehicles: * 2002–2006 Infiniti Q45, and * 2003–2008 Infiniti FX45, and * 2003–2004 Infiniti M45, and * 2006–2010 Infiniti M45, and ' * 2004–2010 Nissan Fuga 450 GT, and * 2003–2010 Nissan President and * 2007 Super GT Nissan 350Z, and (Non-Production) * 2008 Super GT Nissan GT-R, and (Non-Production) * 2011-2013 Various LMP2 racing cars (Non-Production) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nissan VK engine」の詳細全文を読む スポンサード リンク
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