Nissan Skyline GT-R
Fifth generation (1999–2002)
The GF-BNR34 (R34) Skyline GT-R and GT-R V·spec models were released in January 1999. The R34 GT-R was also shorter (from front to rear), and the front overhang reduced. The valve covers were painted glossy red (color code Cherry Red Effect Z24 or X1020), as opposed to black in previous models.
A new feature on the R34 GT-R is a 5.8" LCD multifunction display on the center of the dashboard, which shows seven different live readings of engine and vehicle statistics such as turbocharger pressure (1.2 bar max), oil and water temperature, among others. The GT-R V·spec model added two extra features to the display: intake and exhaust gas temperatures. Nismo Multi-function Displays (MFD) can be bought at an extra cost, they include a lap timer, G-Force meter and an increase in boost pressure measurement to 2 bar. The R34 GT-R was made shorter in response to customer concerns who thought the R33 was too bulky.
Like the R33, the new R34 GT-R V·spec (Victory Specification) models come equipped with theATTESA E-TS Pro system and an Active LSD at the rear, while standard GT-R models come with the non-Pro system and a conventional mechanical differential. The V.spec model also had firmer suspension and lower ground clearance, thanks to front and side splitters, as well as a rear carbon fiber air diffuser, designed to keep air flowing smoothly under the car.
Another special model of the R34 GT-R is the M·spec. It was similar to the V.spec, but had special "Ripple control" dampers, revised suspension set up, stiffer rear sway bar and a leather interior with heated front seats. The 'M' on the M·Spec stood for Mizuno who is the chief engineer of Nissan.
At the time of the R34's release, like the R32 and R33, Nissan released an R34 N1 model. The R34 GT-R N1 was equipped similar to the R32 and R33 N1 models – a homologation special. It was sold without air conditioning, audio equipment, rear wiper, or trunk lining, but ABS remained. The new R34 N1 was also given the new R34 N1 engine. Only 45 R34 V.spec N1 models were produced from the factory, 12 of which Nismo used for Super Taikyu racing. The rest were sold to various customers, mostly racing teams and tuning garages.
The V·spec version was also imported into the UK with a number of modifications carried out on the car. These included 3 additional oil coolers, revised ECU map, full Connolly leather interior, underbody diffusers, stiffer suspension, active rear limited slip differential, extra display feature on the in car display.
In October 2000, Nissan released the V·spec II, replacing the V·spec. The V·spec II has increased stiffness in the suspension (even stiffer than the original V·spec) and had larger rear brake rotors. It also comes equipped with a carbon fiber hood equipped with a NACA duct, which is lighter than the aluminum that all other GT-R hoods are made from. Also different on the V·spec II was an iridium center console and aluminum pedals. The seats were upholstered with black cloth rather than the gray cloth used on previous R34 GT-R models, and the amber turn lenses were replaced with white versions. With the exception of the carbon fiber bonnet, the standard trim level GT-R also received these updates.
In February 2002 Nissan released a final production model of the R34 GT-R called the Skyline GT-R V·spec II Nür[26] and the Skyline GT-R M·spec Nür. The Nür was named after the famous German Nürburgringracetrack, where the Skyline was developed. In total 1000 R34 GT-R Nür(s) were made, 750 were V·spec II Nürs' and 250 were M·Spec Nürs'. The Nür model featured an improved RB26DETT based on the N1 racing engine. The standard turbochargers were upgraded to larger versions with a slight increase in boost and the ceramic blades were replaced with steel versions. This has increased lag, but to compensate the turbo's durability was improved while being able to handle a bigger boost increase. This allowed tuners to increase the boost safely with standard turbos up to 340 kW (450 hp) at the crank. The V.spec II Nür is based on the regular V·spec II model, and the M·spec Nür was based on the regular M·spec model. Other than the addition of the Nür engine, the Nür models also included a different color of stitching on the interior trim, as well as a speedometer reading up to 300 km/h (186 mph), and gold valve covers instead of red. Due to Japanese car industry norms at the time, the car was advertised as having 206 kW (276 hp) but it actually had over 246 kW (330 hp) when it left the factory.
Standard Cars = 3,965
V·Spec = 1,308
V·Spec UK = 80
V·Spec N1 = 45
V·Spec II = 5,512
V·Spec II Nür = 750[26]
V·Spec II N1 = 18
M·Spec = 228[27]
M·Spec Nür = 250
V-Spec II NISMO Z-tune 2 = 19
Total = 12,175
Z-Tune
Nismo originally designed the concept of the Z-tune in 2002 when Nissan was putting an end to the R34 Skyline production. The first Z-tune was built in 2003, using a used 2002 Skyline GT-R V·spec II. It was built with a concept RB26DETT 'Z1' engine. This engine was based on Nissan's Le Mans GT2 and GT500 racing experiences. As with the racing vehicles a strengthened engine block and stroked crankshaft were utilized. The engine was also bored. With the new displacement of 2.8 L and upgraded turbo-chargers the Z1 produced 370 kW (500 hp). The Z-Tune had a 0–100 km/h (0–60 mph) time in 3.8 seconds and has a top speed of over 203 mph.
Nismo was then given the approval from Nissan to build Z-tune models for the Nismo anniversary. Nismo then purchased 20 used R34 GT-R V·spec, each with less than 18,000 miles (29,000 km) on the clock, they were then completely stripped and were resprayed to a "Z-tune Silver," a special color exclusively for the Z-tune.[28] For each of the 20 production models, the 2.8 L engine was revised to allow it to reach 8000 rpm. The turbochargers were supplied by IHI in Japan. The engine is advertised as making as much as 370 kW (500 hp) (for warranty reasons). This second revision of the Z-tune engine is called the 'Z2'. The bodywork is designed with the same functional components used in Nismo's GT500 racing cars, such as engine bay vents on the hood and fenders, as well as wider fenders for wider wheels. The Z-tune is also improved with an aggressive suspension setup from Sachs, and a specially designed Brembohand brake system.
The entire car is essentially handmade, with the car being completely stripped and re-built from the chassis up. Engineers reinforced and stiffened the chassis seam welding in key areas such as the door seams and door frames and added carbon fiber to the strut towers and transmission tunnel and the engine bay, completely redesigning the suspension, drivetrain, engine, gearbox and other components so as to work at maximum efficiency and reliability as is expected of a road-going vehicle. Although Nismo planned on building 20 cars, they ceased production on only 19 (including 2 prototypes).[29] The Z-tune is often regarded as the most expensive (prices for some have been known to exceed US$290,000) street legal GT-R ever built.
Replacement
Following the end of R34 production in 2002, Nissan announced they would separate the GT-R model from the Skyline name, creating an entirely new vehicle—though based on the same platform as the Skyline. This new car, now known simply as the Nissan GT-R, debuted in 2007 in Tokyo. Released to consumers in 2008, it was the first GT-R available worldwide, entering the North American market for the first time.
Though based on the FM platform used by the V36 generation Skyline,the GT-R uses an evolved Premium Midship (PM) platform. The car retains its heritage by using the chassis code DBA-R35, or simply R35.
Powertrain
The GT-R of the 1990s included a 2.6 L straight six-cylinder twin-turbo engine producing 206 kW (276 hp). The stock turbo-chargers were of a hybrid steel/ceramic design allowing them to spool up faster due to the light nature of the ceramic exhaust wheel.
The drive train delivered power to all four wheels using an electronically controlled all-wheel-drive system Nissan called the ATTESA E-TS. The ATTESA E-TS system used two accelerometers mounted under the center console, which fed lateral and longitudinal inputs to the ECU. The ECU then controlled power delivery to the front wheels via an electronic torque split converter. In 1995, the ATTESA E-TS Pro was introduced as an option for R33 GT-R customers, and came as standard equipment in GT-R V.spec models. It was later standard equipment in all GT-R models for the R34 Skyline GT-R. The ATTESA E-TS Pro added an Active Limited Slip Differential, which was controlled by the onboard ATTESA computer. This was only for the rear differential, as the front differential remained as a normal Limited Slip Differential. The ATTESA E-TS Pro was also advertised in brochures as adding an electronically controlled 4-channel ABS brake system. Although it is not related to the all wheel drive system, it uses much of the same sensors, and the same computer. The R32 could be switched from AWD to RWD by removing the 4WD fuse, but R33 and R34 models had to have the front tailshaft removed, or the centre diff can be depressurised for 'towing mode' as specified in the owners manual.
The car also had computer-controlled all wheel steering system referred to as HICAS. The HICAS system activated when the vehicle exceeded 80 km/h (50 mph) and controlled the steering of the rear wheels in the same direction as the front to improve turn in on entry to corners. It should be noted however that this feature is often seen as more of a hindrance than help in race applications. The system tends to favor less advanced drivers, and can make the rear suspension unstable during high speed cornering. For this reason many kits are available to override this system. These kits usually loop the hydraulic lines back on themselves on the R32. Kits for the R33/34 models use a simple lock out bar—or a Tomei kit, which also alters the electrical control system ( the 33 and 34 had electronic HICAS). These modifications strive to make the car more predictable when driving at the limit of traction.
While the published figures from Nissan were as quoted above, tests showed the car had a factory power output of closer to 330 PS (243 kW; 325 hp) at the flywheel. The lower published figure was Nissan's response to the need to abide by a gentleman's agreement between the Japanese auto manufacturers not to release a car to the public exceeding 280 PS (206 kW; 276 hp) of power output.
N1 engines
RB26DETT N1 is an upgraded version of the standard RB26DETT engine. It was developed by Nissan Kohki's REINIK division for NISMO and N1 race cars. The standard RB26DETT, although known for its durability, proved to require too much maintenance for Group N (N1 class) racing conditions. REINIK started with strengthened RB26DETT block. N1 block is identified by its 24U number stamped on the block (05U standard blocks). The cylinder walls are thicker and water cooling channels are enhanced to increase flow. It also received an upgraded oil pump and water pump, to improve the cooling and lubrication for race conditions. The pistons have 1.2 mm (0.047 in) top rings and were balanced before assembly but otherwise very close to standard. The connecting rods are also similar to standard but made from slightly stronger material and balanced. Standard crankshaft is balanced to a higher level. Higher flow exhaust manifolds and turbochargers were added for increased torque and slightly higher top-end power. Turbine wheels on the N1 turbochargers are also made from steel for durability, rather than the lighter but weaker ceramic found on the standard turbine.
The R32 Skyline GT-R N1 street car marked the N1 engine's introduction to the consumer. R32, 33, and 34 N1 street cars were known for lack of amenities and their light weight. The R33 N1 engine and turbochargers were slightly revised, and the R34 N1 engine saw further improvement. The camshaft timing was altered slightly for more torque. R33 and R34 N1 turbochargers are the same size however R34 N1s use a ball bearing center section. NISMO states the ball bearings in the R34 N1 allow them to spool 400rpm faster than R33 N1.
The final N1 engine is the R34 Nür engine. The only differences are the cam cover color change from red to gold and R34 Nür edition was a fully loaded street car. There were 1000 Nür engines made for use in the R34 V.spec II Nür and R34 M-spec Nür models.
