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| Manufacturer | Nissan Motor Co., Ltd. |
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| Also called | Nissan ZH |
| Production | 2002– |
| Predecessor | Nissan VH |
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 Titan/Armada/Qx56 engine is 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 boost low-end torque or unleash high-end horsepower.
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VK45DE
The 4.5 L (4494 cc) VK45DE was introduced in 2002 and is built in Yokohama, Japan. Bore is 93 mm (3.7 in) and stroke is 82.7 mm (3.26 in). Output is 340 hp (254 kW) at 6400 rpm with 333 ft·lbf (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 fuel injection, 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.
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- Warning to all those who own this engine** All VK45de engine consume oil. The PCV-positive crank case ventalation passages in the valve covers are not desigened correctly and flow too much, thus allowing large amouts of oil into the intake system. This will cause puffs of blue and white smoke after cold starts! In lack of attention this condition will cause low oil level, which in turn results in worn cylinder rings causing excessive blow-by gases. The engine will eventually develope low compression in the rear most cylinders first. To easily confirm this condition- remove the intake duct from the throttle chamber and open the throttle flap manually. Large amounts of oil residue will be seen, as well as oil pooling in the back of the intake manifold plentum... Nissan and Infiniti are not stepping up to the plate althought this is a know issue. They are putting the blame on the customers lack of service. Record all service data and present your case to a dealer. Under proper service the engine will be replace under full warranty it the vehicle is within the time and mileage limit...
If you are mechanically savvy you can fix this problem. Remove the fresh air hose, and both pcv valve hoses. Install a second pcv valve inline with the factory one using acrylic hose. then install an inline moisture filter (like the ones used with automotive paint sprayers) inline on all three hose. The moisture filters will need to be replaced incombination with your yearly service. For disposable inline filters see any automotive paint or most parts stores.
Motorsport
The VK45DE is used by Nismo for Super GT races with the Nissan GT-R instead of using the GT-R's VR38DETT twin-turbo V6 engine.[1] The VK45DE was previously used in Nissan's 350Z Super GT car, replacing the previous VQ30DETT used in that car in 2007. In race trim, the Super GT VK45DE produces 500 PS (490 hp) and 52 kg·m (380 ft·lbf) of torque.[2] 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 800 PS (790 hp).[3] 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, 340 hp (250 kW)
- 2003–2008 Infiniti FX45, 315 hp (235 kW) and 446 N·m (329 ft·lbf)
- 2003–2004 Infiniti M45, 340 hp (250 kW) and 451 N·m (333 ft·lbf)
- 2006–present Infiniti M45, 325 hp (242 kW) and 461 N·m (340 ft·lbf)
- 2004–present Nissan Fuga 450 GT, 333 hp (248 kW) and 461 N·m (340 ft·lbf)
- 2003-present Nissan President 280 PS (280 bhp) and 451 N·m (333 ft·lbf)
- 2007 Super GT Nissan 350Z, 490 hp (370 kW) and 52 kg·m (510 N·m; 380 ft·lbf)
- 2008 Super GT Nissan GT-R, 490 hp (370 kW) and 52 kg·m (510 N·m; 380 ft·lbf)
VK45DD
The VK45DD is the same as the VK45DE but adds an direct injection fuel system. This was Nissans first V8 with direct injection. It produces (officially) 280 PS (206 kW; 276 hp) @6000 rpm and 451 N·m (333 ft·lbf) @3600 rpm. But it has unofficially over 300 PS (221 kW; 296 hp). It has a compression ratio of 11.0.
It was used in the following:
- 2001–present Nissan Cima
VK50VE
The VK50VE is a 5.0 L V8 engine with 390 hp @6500 rpm and 500 Nm @4400 rpm and redline is at 6800 rpm. Bore x stroke (mm) are 95.5 x 87.7 and compression ratio is 10,9. It has Nissans VVEL technology.
Applications:
- 2009- Infiniti FX
http://nissan.iconicweb.com/assets/specs/2009_FX_Specs_NNA_Final.pdf
VK56DE
The VK56DE is a 5.6 L (5552 cc) version built in Decherd, TN. Bore is 98 mm (3.9 in) and stroke is 92 mm (3.6 in). Output is 317 hp - 320 hp (227 kW) at 4900 rpm with 375 to 390 ft·lbf (509-522 Nm) of torque at 3600 rpm. It has aluminum-alloy block and heads and low-friction molybdenum-coated pistons. The valvetrain is a dual overhead cam (DOHC). It has 4 valves per cylinder with micro-finished camshafts and ductile iron cylinder liners for increased durability.
Motorsport
Nismo also uses the VK56DE for FIA GT1 racing. In race trim, it produces 600 horsepower and 479 pound-feet of torque.[4]
Applications:
- 2004–present Nissan Armada, 317 hp (236 kW)
- 2004–present Nissan Titan, 317 hp (236 kW)
- 2004–present Infiniti QX56, 320 hp (240 kW)
- 2008–present Nissan Pathfinder, 310 hp (230 kW)
- 2009 Nissan GT-R GT1, 600 hp (450 kW)
- Note: the Titan numbers are for 87 octane fuel. The 320 hp (240 kW) number for the Infiniti was using premium (91 octane) fuel. Using 91 octane fuel equalized the hp number.
VK56VD
The "VK56VD" is a 5.6 L (5552 cc) engine that uses direct injection and has 4 valves per cylinder and features Nissan's VVEL (Variable Valve Event and Lift) system. The output is expected to be more than 400 hp (300 kW).
Applications:
- 2011–present Infiniti M56, 400 hp (300 kW) or more
References
- ^ "Autocar article about the Super GT Nissan GT-R". http://www.autocar.co.uk/News/NewsArticle/Nissan-GT-R/230696/.
- ^ "NISMO Japan's Super GT GT-R spec sheet in Japanese". http://www.nismo.co.jp/motorsports/race/SUPERGT2008/specifcation.html.
- ^ "YouTube video of NISMO engineer interview regarding the Super GT Nissan GT-R". http://www.youtube.com/watch?v=yaowvWwD-Rs.
- ^ http://www.topgear.com/uk/car-news/nissan-gtr-gt1-2009-04-08
See also
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