Nissan-Skyline-GT-R NIZMO 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.
Higher Performance RB26DETT ENGINE
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.
Nissan-Skyline-GT-R ZTune BNR34 (RB28DETT) "Z2"
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.
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.
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 .
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.
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
COOLING PARTS
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.
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