The heart of the NISMO R34GT-R Z-tune that exhibits such dominating power performance is the RB 26DETT Modified Z2 engine.

To achieve an engine that generates high power/torque of more than 368 kw (500 ps)/540 N/m (55 kg/m) and provide the high durability required of road-going cars, plenty amount of techniques and know-how that NISMO accumulated throughout the racing scenes, have been lavishly adopted into this Z2 engine, that some may even find the quality to be too much extreme for a road-going vehicle.

It is NISMO' s qualified mechanics, who has spent many years developing and tuning race engines, who use these high-quality parts and breath life into the engine. The RB26DETT modified Z2, of course has been verified of its performance using cutting-edge equipment such as an engine dyno, and the skills of professional engineers and mechanics.

In addition, a serial number is applied to each of the 20 RB26DETT modified Z2 engines, and this will be used for data management in the future.

Engine body parts
RB26DETT modified Z2 = Race engine parts breath life into the heart
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 main 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 2001, the 2.8L engine has been used for GT500 competition. It achieves both a 2.8L large bore (ø87 mm) and high boost while maintaining the block rigidity required of an N1 specification engine block with improved strength and rigidity. The engine block used in this Z2 too, is specially made to carry over this GT500 strength and rigidity.
GT crankshaft
In addition to the GT engine block, a long-stroke crankshaft, which has proven its performance and durability in the GT500 engine and in races of various categories, such as Nürburgring 24-Hour Endurance Race, was used. In addition to achieving a standard ratio 4 mm up long stroke (77.7 mm), die forging and fillet roll machining were used achieve high durability.
To achieve the domineering engine performance and engine response of over 368 kw (500 ps)/540 N/m (55 kg/m) at a maximum boost pressure of 0.15 MPa (1.5 kg/cm) using a pistons specially forged for the RB26DETT modified Z2, special lightweight, highly rigid forged pistons with cooling channels were developed.
GT connecting rod
As with the GT crankshaft, the 121.5 mm dimension connecting rod has actually been used in the GT500 as well as in vehicles with specifications for the Nürburgring 24-Hour Endurance Race. It is made from SNCM439 to achieve both a light weight and high strength.
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.
A turbocharger made by IHI (though the specifications differ) that has proven itself in both the GT500 since 2001 and in the 2004 Nürburgring 24-Hour Endurance Race is used. Ball bearings are used in the bearings to suppress the drop in the response that is created by large turbochargers while achieving a commanding turbo feeling during high boost.
The catalyzer performance was improved and the pipe shape and diameter were optimized to effectively scrub and discharge the large volume of exhaust gas created by an expanded exhaust amount and high boost. The pipe is made of titanium (the front tube is made of stainless steel) to significantly reduce the weight.
Engine machining
Cylinder head -Combustion chamber shape changed and volume adjusted
-Camshaft recess machining
-IN &EHX port corrected
Engine block -Boring and honing
-Oil gallery plug added
Piston & connecting rod  -Weight matching (within 1 g)
Crankshaft -Dynamic balance
Intake collector -Uneven surface correction grinding
Exhaust manifold -Uneven surface correction grinding & stiffener processing

Cooling parts
The core capacity was increased, the fin pitch and shape were changed, pressure loss was reduced, and cooling performance was improved.
The core capacity was increased, the fin pitch and shape were changed, pressure loss was reduced, and cooling performance was improved. In addition, aluminum 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.
NOTICE:The images of NISMO R34GT-R Z-tune in this brochure are proto type of its.
For sell, their specification, equipments or price can be changed without notice.
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