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Nissan VK engine
MyWikiBiz, Author Your Legacy — Thursday September 09, 2010
Template:Infobox Automobile engine The VK engine (formerly known as the ZH) is a V8 piston engine from Nissan. It is an aluminum DOHC 4-valve design with variable valve timing. The timing of the intake valves is continuously fine-tuned to ensure air enters the cylinder at exactly the right moment for optimum combustion. It also features a variable intake system and an optional direct injection fuel system.
The VK is based on Nissan's VQ V6 rather than the VH V8 used in previous Q45/Cima models. Changes include titanium valves and aluminium lifters, which being lighter than equivalent steel items allow the engine to respond more quickly and more quietly. The intake manifold directs air through different paths at different engine speeds to boost low-end torque or unleash high-end horsepower. The 4.5 L engine uses a 93 mm (3.7 in) bore and 82.7 mm (Expression error: Unrecognised word "expression" in) stroke and a 90° bank angle.
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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 (Expression error: Unrecognised word "expression" 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, a one-piece cast camshaft, and an unusual nylon intake manifold, variable-flow induction system optimizes airflow for low- and high-speed operation and low-friction molybdenum-coated pistons and microfinished crankshaft.
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 
and Template:Convert/kgm 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 .[3] Nismo reasons that by using the engine, they eliminate turbo-lag, save weight and generally prefer the torque curve of the atmospheric V8. The engine and car may be used by Nismo in Lemans racing with, according to Lemans rules, production spec GT-R's with a variant of the VK45.
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
- 2003–2004 Infiniti M45, 335 hp (250 kW) and
- 2004–present Nissan Fuga, 333 hp (248 kW) and
- 2007 Super GT Nissan 350Z, 490 hp (370 kW) and Template:Convert/kgm
- 2008 Super GT Nissan GT-R, 490 hp (370 kW) and Template:Convert/kgm
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 (276 hp/206 kW) @6000 rpm and @3600 rpm. But it has unofficially over 300 PS (296 hp/221 kW). 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 microfinished camshafts and ductile iron cylinder liners for increased durability.
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)
-
- 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.
References
- ^ Autocar article about the Super GT Nissan GT-R.
- ^ NISMO Japan's Super GT GT-R spec sheet in Japanese.
- ^ YouTube video of NISMO engineer interview regarding the Super GT Nissan GT-R.
See also
Nissan team checks quality in Thai-made March cars FILE - In this July 13, 2010 file photo, Nissan Motor Co. Chief Operating Officer Toshiyuki Shiga poses for photographers with the automaker's new vehicle called March in Yokohama near Tokyo, Japa... 9 September 2010
Nissan unveils new brand BEIJING - A CHINESE unit of Japan's number three automaker Nissan Motor has announced it will launch a new brand for China to tap the huge demand in the world's largest car market. 9 September 2010
Nissan team checks quality in Thai-made March cars FILE - In this July 13, 2010 file photo, Nissan Motor Co. Chief Operating Officer Toshiyuki Shiga poses for photographers with the automaker's new vehicle called March in Yokohama near Tokyo, Japan. A... 9 September 2010
Nissan Team Checks Quality in Thai-Made March Cars Nissan expert team double-checks quality in Thai-made March cars being sold in Japan Nissan Motors - Japan - Nissan - Makes and Models - United States 9 September 2010
Nissan team checks quality in Thai-made March cars Thai-made Nissan March subcompact cars - the first major model from a Japanese automaker being mass produced abroad for sale in Japan - are getting extra scrutiny from a team of quality experts to meet choosey consumer... 9 September 2010
Nissan Commends Tennessee for Rebate That Will Advance Zero-Emission Mobility in Volunteer State Nissan North America, Inc. applauds the state of Tennessee and Governor Phil Bredesen on the announcement of a $2,500 rebate toward the first 1,000 purchases of an electric vehicle in the state. 8 September 2010
