November 06, 2011

Nissan GT-R

The Nissan GT-R is a sports car produced by Nissan released in Japan on December 6, 2007, the United States on July 4, 2008, and the rest of the world in March 2009.

 Nissan GT-R35

History

Between 1969 and 1974, and again between 1989 and 2002, Nissan produced a high performance version of its Skyline range called the Nissan Skyline GT-R. This car proved to be iconic for Nissan and achieved much fame and success on road and track. The Nissan GT-R, although no longer carrying the "Skyline" badge, has heritage in the Nissan Skyline GT-R. Like the Skyline GT-Rs R32 through R34, the Nissan GT-R is all-wheel drive with a twin-turbo 6 cylinder engine; however, the evolutionary, incremental changes between Skyline models R32 through R34 have been done away with. The four-wheel-steering HICAS system has been removed, and the former straight-6 RB26DETT engine has been replaced with a new V6 VR38DETT. Because of the GT-R's heritage, the chassis code for the all-new version has been called CBA-R35, or 'R35' for short (where CBA is the prefix for emission standard), carrying on the naming trend from previous Skyline GT-R generations. The GT-R has also retained its Skyline predecessor's nickname Godzilla.

Concepts 

Two concept vehicles were displayed at motor shows prior to the unveiling of the production model. The first concept was shown at the Tokyo Motor Show in 2001 to preview what a 21st century GT-R would look like. At the 2005 Tokyo Motor Show, Nissan unveiled a redesigned concept, the GT-R Proto, stating that the production GT-R would be 80-90% based on this concept. 

Production

Production model

The production version of the GT-R debuted at the 2007 Tokyo Motor Show, launching in the Japanese market on December 6, 2007. The U.S. official launch was 7 months later on July 7, 2008. Universal Nissan in Los Angeles provided a customer with the delivery of a new GT-R, fresh from the production line at 12:01 a.m., on July 7, 2008. The Canadian launch was also in July 2008. Europe became the third consumer market, where it launched in March 2009. The large disparity in initial marketing between these regional releases is due to Nissan having to build GT-R performance centers where the car is serviced. Also the engine and rear-mounted dual-clutch gearbox are built by hand, thus limiting production to around 1000 cars a month.

GT-R Prototype at the 2005 Tokyo Motor Show

Facelifted GT-R

The revised GT-R (2012 model year for the US) features an engine with revised mapping, changes to valve timing, larger inlets and a revised exhaust system which boosts rated power to 530 bhp and 612Nm of torque from 3200 to 6000rpm. Changes also include a new more rigid front strut bar made from carbon composite, larger front brake rotors, new lighter and stiffer wheels, and revised Dunlop tires. Cosmetic changes include a new front bumper with integrated LEDs which adds cooling to the radiator and front brakes while reducing drag, a new rear diffuser which improves downforce, additional rear cooling ducts, and improved interior quality. The revised GT-R went on sale in Japan from mid November 2010 and February 2011 in North America, Europe and other regions.

Nissan’s VP of global product planning Andy Palmer has confirmed that the current GT-R (R35) will be replaced by 2013.
Nissan GT-R  2011

Specifications

2007-2011
The Nissan GT-R is powered by the VR38DETT engine, a 3,799 cc (3.8 L; 231.8 cu in) DOHC V6 with plasma transferred wire arc sprayed bores. Two parallel Ishikawajima-Harima Heavy Industries (IHI) turbochargers provide forced induction. Production vehicles produce a manufacturer-claimed engine output of 485 PS (357 kW; 478 hp) at 6400 rpm and 434 lb·ft (588 N·m) at 3200-5200 rpm. The engine also meets California Air Resources Board Ultra Low Emission Vehicle (ULEV) standards. A curb weight of 1,730 kg (3,800 lb) or 1,736 kg (3,830 lb) with side curtain airbags is achieved using a jig welded steel chassis with aluminum used for the hood, trunk, and doors. A rear mounted six-speed BorgWarner designed dual clutch semi-automatic transmission built by Aichi Machine Industry is used in conjunction with the ATTESA E-TS system to provide power to all four wheels and along with Nissan's Vehicle Dynamics Control (VDC-R) to aid in stability. Three shift modes can also be selected for various conditions.
The VR38DETT engine 
  • Displacement: V6 3,799 cc (3.8 L; 231.8 cu in)
  • Horsepower: 485 PS (357 kW; 478 hp) at 6400 rpm
  • Torque: 434 lb·ft (588 N·m)
  • Redline: 7000 rpm
  • Drivetrain: Premium Midship AWD
  • Curb weight: estimated 3,820 lb (1,730 kg)*
  • Top Speed: 193 mph (311 km/h)*
  • Drag coefficient: 0.27*
  • MSRP: US$80,790 to $84,060**
* manufacturer claimed
** 2011 model year for North America
present (facelifted)
  • Horsepower: 530 PS (390 kW; 520 hp) at 6400 rpm
  • Torque: 612 N·m (451 ft·lbf) at 3200-6200 rpm, (632 N·m (466 ft·lbf) with high-gear 'boost' on SpecV only)
  • Drag coefficient: 0.26* (~10% improvement in downforce)*
  • MSRP: US$89,950 (Premium) or $95,100 (Black Edition)****
* manufacturer claimed
**** 2012 model year for North America 

Performance

Nissan claims the GT-R can reach a top speed of 193 mph (311 km/h), Motor Trend recorded a top speed of 195.0 mph (313.8 km/h). It has been tested to achieve 0-60 mph (97 km/h) times as low as 3.2 seconds with "launch control" and 3.8 seconds without (improved to 3.5 seconds in models produced since March 2009). Nissan's chief vehicle engineer Kazutoshi Mizuno has indicated that he has never used the term "launch control", which refers to the act of turning off vehicle dynamic control (VDC) and launching the car at around 4500 rpm. However, Nissan's director of product planning John Wiener clearly stated in an interview with Jay Leno that "we (Nissan) actually offer a 'launch mode'". The GT-R user's manual states that turning off the VDC is only meant for escaping low-traction situations such as mud or snow. Nissan has re-programmed the 2010 model year GT-R to reduce the engine speed at launch to around 3,000 to 3,500 rpm with VDC enabled, which is meant to improve acceleration times. The new programming was also installed on old 2009 vehicles still in Nissan's inventory, and is available for existing 2009 vehicles. The new facelifted GT-R however now has a launch mode, which Nissan calls "R-Mode Start", and is activated by setting the Transmission and VDC to "R" mode (the Suspension settings can be left in normal mode), holding the brakes, then the throttle, and finally releasing the brakes. The engine speed is now held at 4,000 rpm in this mode, and it no longer voids the warranty. However, the system allows a maximum of 4 consecutive hard launches before locking itself out, after which it can be unlocked by driving normally for 1.5 miles. Tests by Edmund's Inside Line have shown the 2012 GT-R to achieve 0-60 mph in 2.9 seconds with R-Mode Start activated and did the 1/4 mile in 11.2 seconds going 122.7 MPH.

Cutaway model showing rear mounted transmission

Source : www.wikipedia.com