Nissan-Skyline-GT-R ZTune BNR34
A complete car, created from an approved vehicle similar to the above R34 Skyline GTR that has been hand picked by NISMO.
A vehicle with less than 30,000 Klms, meets all quality requirements including those for body condition, parts that will be modified are removed, the body is reinforced and all other work is performed before the vehicle is painted and re-assembled.
All work on the vehicle from engine production to vehicle assembly is performed by expert mechanics using the same hand made craftsmanship used in race cars to achieve specifications and a level of accuracy that is unachievable in mass produced vehicles.
The Z-tune RB26DETT modified Z2 Z-tune has a 2.8 L twin turbo instead of the stock 2.6 L engine, racing pistons, connecting rods and camshafts, and an upgraded ECU, giving the Z-tune 500 hp (370 kW) and 540 N·m (400 lb·ft) of torque.
The heart of the NISMO R34 GTR Z-tune that exhibits such dominating power performance is the RB26DETT modified Z2 engine. To develop an engine that generates high power/torque of more than 368 kw (500ps)/540 N/m (55 kg/m) and provide the high durability required for road-driven cars.
The techniques and knowledge that NISMO accumulated throughout years of racing have been adoped into the Z2 engine resulting in quality that some may even find extreme for a road driven vehicle. It is the expertise of NISMO's qualified mechanics who have spent many years developing and tuning race engines using only the highest quality parts, that breathe life into the engine.
The performance of the RB26DETT modified Z2 has been verified using cutting edge equipment, an engine dyno and the skills of professional engineers and mechanics. A serial number is applied to each of the RB26DETT modified Z2 engines and this serial number will be used for data management in the future.
CAMSHAFT: The camshaft is an important part that determines the engine performance and characteristics. The major issues facing the RB26DETT modified Z2 engine were balancing the opposing elements of high power and emissions reduction. NISMO resolved these issues by thoroughly testing the cam profile, lift amount and valve timing. The optimum values and shapes were used in combination with the selected engine compression ratio, turbocharger, exhaust system and other components.
GT ENGINE BLOCK: Since 2000, the 2.8L engine has been used for GT500 competition. It achieves both a 2.8L large bore (87mm) and high boost while maintaining the block rigidty required of an N1 specfication engine block with improved strength and rigidity. The engine block used in this Z2 is specially made to carry over this strength and rigidity.
GT CRANKSHAFT: In addition to the GT engine block, a long-stroke crankshaft, which has proven it's performance and durability in the GT500 engine and in races of various categories, such as the Nurburgring 24 Hour Endurance Race, was used. Die forging and fillet roll machining were used to achieve high durability.
PISTONS: To achieve the domineering engine performance and engine response of over 368kw (500ps) and 540Nm (55kg/m) at a maximum boost level of 1.5kg/cm (22 pounds) using pistons specially forged for the RB26DETT Z2, special lightweight, highly rigid forged pistons with cooling channels were developed.
GT CONROD: As with the GT crankshaft, the 121.5mm conrod has actually been used in the GT500 as well as in vehicles built to specifications suitable for the Nurburgring 24 Hour Endurance Race .
INTAKE COLLECTOR: The intake pipe length and diameter as well as the collector tank body cross-sectional shape were changed to improve the airflow to all cylinders and increase the intermediate speed torque.
TURBOCHARGER: A turbocharger made by IHI (though the specifications differ) that has proven itself in both the GT500 since 2001 and in the 2004 Nurburgring 24 Hour Endurance Race is used. ball Bearings are used to supress the drop in the response that is created by large turbochargers while achieving a commanding turbo feeling at high boost.
EXHAUST: The Catalytic Converter's performance was improved and the pipe shape and diameter were optimised to effectively scrub and discharge the large volume of exhaust gas produced from such high boost levels. The pipe is made of titanium (with a stainless front tube) to significantly reduce weight.
ENGINE PORT MATCHING:
Cylinder Head: Combustion chamber shape changed and volume adjusted
Camshaft recess machining
Engine Block: Boring and Honing
Oil gallery plug added
Piston & Conrod: Weight Matching (within 1g)
Crankshaft: Dynamic Balance
Intake Collector: Uneven surface correction grinding
Exhaust Manifold: Uneven surface correction grinding & stifferner processing
INTERCOOLER: The core capacity was increased, the fin pitch and shape were changed, pressure loss was reduced, and cooling performance was improved.
RADIATOR: The core capacity was increased, the fin pitch and shape were changed, pressure loss was reduced, and cooling performance was improved. In addition, aluminium was used to focus on cooling performance during high-speed driving and high engine speeds in particular.
OIL COOLER: Twin air-cooled oil coolers were installed on the front side to achieve a stable oil temperature during high-speed driving.
The body, suspension, and brake unit were thoroughly worked on to utilize the dominating power performance of the RB26DETT Z2 engine.
BODY SHELL "LIGHTWEIGHT AND RIGID": Spot welding was added to the door frame and CFRP molded parts were adhered to areas that are easily deformed by the heat of welding to create a tough body, which serves as the frame of the vehicle.
Increased spot weld areas: Door Frame
CFRP adhered areas: Front strut upper area
Hood reinforcement area
Centre Tunnel Area
SPECIAL Z-TUNE SUSPENSION MADE BY SACHS: Special tuning for "Z-Tune" based in a damper made by SACHS (vehicle height, attenuation force, 3-way adjustment type) which has been proven in the GT500 vehicles was used for the suspension. A wide range of driving conditions is supported by fitting Semi-slick tyres for hgh speed driving on closed circuits or by fitting sports radials for street driving.
Spring Rate: Front 14kg/mm
Suspension Link: Size changing parts for changing geometry
Suspension Bushes: Increased rubber hardness and reduced friction
“SUPER COPPERMIX” TWIN PLATE CLUTCH: The clutch is one of the major components of the power train, and here the SUPER COPPERMIX TWIN, which was newly developed to handle 441 kw (600 ps)/589 N/m (70 kg/m) and be extremely easy to use, was employed. This new clutch, which was all but developed for the NISMO R34GT-R Z-tune, uses a high-friction material made using the optimum blend of copper in the disc to reduce the friction and deformation caused by heat and to suppress shudder, which occurs easily in clutches made of metal. Using a disc made of high-friction material makes it possible to lower the clutch cover pressing force and thus reduces the clutch pedal depression force. This emphasizes that this vehicle is a road-going car and not a racing car.
CARBON FIBRE PROPELLER SHAFT AND DIFFERENTIAL OIL COOLER: The propeller shaft is made of CFRP. Weight reduction of 5.26 kg (standard shaft: 12.52 kg) was achieved to contribute to improve driving performance. The transmission and differential oil temperatures during continuous high-speed driving were optimized by installing a special oil cooler. This also contributes to realizing better stability and improving performance when driving continuously on a closed circuit.
SPECIAL Z-TUNE BRAKES DEVELOPED WITH BREMBO:
This brake system, which was developed to a performance target of 1.6G when fitted with Semi-slick tyres, was jointly developed with Brembo. It features such parts as a mono-block 6 piston caliper (for the front), 2 piece front brake rotor with a 365mm rotor, and 355mm one piece rear brake rotor jointly developed with KIRYU.
In addition, the ABS unit was specially tuned to further utilize the performance of these high-performance parts. The ATTESA ET-S and active L.S.D. were specially tuned to accompany the increase in engine power in order to make the torque distribution to the front more suitable and to improve the rear differential effectiveness, among other things, to stay true to the great handling of the base car Skyline GT-R (BNR34).
Front: Mono block 6 piston caliper made by Brembo
365mm 2 piece vented disc
Rear: 4 piston caliper made by Brembo
355mm one piece ventilated disc made by KIRYU
TYRES: The tyres are the only contact between the vehicle and the road surface, and the tyres selected are made by Bridgestone, which has provided many years of support for NISMO’s racing activities. Maximum performance for the each type of driving can be obtained by fitting the POTENZA REO1R 265/35R18 for driving on public roads, and the newly developed POTENZA RE55S 265/35R18 for sports driving on closed circuits.
ALLOY WHEEL "GT500 MODEL": The wheel used with this wide tyre is a black LM GT4 “GT500 Model” lightweight forged aluminum wheel that was newly and jointly developed with RAYS, which, like Bridgestone, has been a partner in NISMO’s racing activities for many years. A wheel with the same rim shape and color as that used for GT500 race vehicles had the rim width and offset specially resized (18 x 9.5J OFF + 5) for “Z-tune.” The pursuit of thorough driving performance was extended even to the wheel.
LIGHTWEIGHT, HIGHLY RIGID DRY CARBON PARTS:
The main features of the exterior are the aerodynamic parts, such as the front bumper, front blister fender, and bonnet, which are made of CFRP specially developed for automotive applications. These CFRP body parts further reduce the weight of the vehicle front.
The front bumper effectively guides air to the engine and brakes, and the front blister fenders were widened by 15 mm on one side to accommodate the wider tread and were also given the function of exhausting the air from the engine room from inside the fenders.
The bonnet has air ducts for obtaining sufficient intake air volume utilizing the ram pressure effect during high-speed driving, and it also features a front under-spoiler to create a lowering force on the front of the vehicle. In this way, all of the aerodynamic parts used on the vehicle were designed with the airflow in mind.
Aero Parts - Front aero bumper made of CFRP
- Front blister fenders made of CFRP
- Front under spoiler made of CFRP (with wear protection plate)
- Bonnet made of CFRP
- Rear spoiler flap made of CFRP
- Side skirt made of ABS plastic
- Rear under spoiler made of FRP
- Rear fender cover made of FRP
COMPLETELY PAINTED WITH SPECIAL BODY COLOURS: The NISMO R34GT-R Z-tune expresses the NISMO corporate colors of black, red, and silver over the entire vehicle.
Special silver (KYO) is used for the body color and a combination of black and red is used for the interior.
SPECIAL EMBLEM PLATE: NISMO complete car special "NISMO chassis plate", NISMO complete car special "NISMO" emblem, NISMO R34 GT-R Z-TUNE special "Z-TUNE" emblem
DECENT YET FUNCTIONAL, SPEAKS FOR REAL PERFORMANCE:
- Alacantra is used for the centre of the seats, and leather seats are used to provide support during the powerful fore and aft, right and left G forces that are generated.
- Coordinated side trim to math the seats
- Full-scale whie meter that goes to 320km/h
- Multi-function display (MFD) featuring data logger, lap time meter, and other functions
- Newly developed steering wheel with airbag