The VK56VD is a 5,552 cc (5.6 L 338.8 cu in) 32-valve, DOHC, Direct Injection Gasoline ( DIG) aluminum-alloy V8 and features Nissan's up-latest VVEL (Variable Valve Event & Lift System).
Some VK56DE powered vehicles are E85 capable.The 320 hp (239 kW) Infiniti QX56 & Nissan Patrol are tuned for premium (91+ octane) fuel. The Titan, Armada, and Pathfinder power figures are for regular 87 octane fuel.It was fitted to a Nissan Altima version of the V8 Supercars "Car of the Future" specification that competed from 2013 until 2019.
The engine has been reduced in capacity to 4,990 cc (5.0 L 304.5 cu in) to fit the V8 Supercars regulations. The Nissan Motorsport VK56DE was launched in Australia for the V8 Supercars Championship in 2013 by Kelly Racing in Melbourne. In race trim, it produced 600 hp (447 kW) and 650 N⋅m (479 lbf⋅ft) of torque. Nismo used the VK56DE for FIA GT1 racing in the Nissan GT-R GT1 from 2010 to 2011. It also has 4 valves per cylinder with micro-finished camshafts and ductile iron cylinder liners for increased durability. The valvetrain is a dual overhead cam (DOHC) design with a continuously variable valve timing control system ( CVTCS) on the intake valves. It has aluminum-alloy block and heads and low-friction molybdenum-coated pistons. The VK56DE is a 5,552 cc (5.6 L 338.8 cu in) version built in Decherd, Tennessee. This was Nissan's first V8 with direct injection (NEO-Di). The VK45DD is a 4,494 cc (4.5 L 274.2 cu in) V8 engine that is very similar to the VK45DE but adds a direct injection fuel system. Also in the Super GT series, an unbranded VK45DE is used for "Mother Chassis" cars the engine is labeled the GTA V8. Nismo reasons that by using the engine, they eliminate turbo lag, save weight and generally prefer the torque curve of the atmospheric V8. Without such restrictions, the engine is reputedly capable of producing nearly 800 PS (588 kW 789 hp).
The engine idles at around 3,500 rpm and is restricted to the above specified power output. The VK45DE was previously used in Nissan's 350Z Super GT car in 2007, replacing the previous VQ30DETT used in that car. It uses SFI, has 4 titanium valves per cylinder with VVT and features forged steel connecting rods, 4 one-piece cast camshafts, an unusual variable-flow induction system optimizes airflow for low- and high-speed operation, low-friction molybdenum-coated pistons, and a microfinished crankshaft.Ī 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. It has an aluminum engine block and aluminum DOHC cylinder heads. The 4,494 cc (4.5 L 274.2 cu in) VK45DE was introduced in 2002 and is built in Yokohama, Japan. The intake manifold directs air through different paths at different engine speeds to optimise low-end torque or high-end horsepower. Changes include: a variable intake manifold, newly designed heads, and a larger drive by wire throttle chamber. The VK engine was originally based on Nissan's VQ V6 rather than the VH V8 used in previous Q45/ Cima models. The VK engine (formerly known as the ZH) is a V8 piston engine from Nissan.
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