Nissan VQ37VHR V6 Engine 

Company	Nissan Motor Iwaki Plant
manufacturing period	2007-
type	V type 6-cylinder DOHC 24 valve VVEL
displacement	3,696cc
Inner Diameter x Stroke	95.5x86.0mm
compression ratio	10.6
Maximum output	245kW (333PS) /7,000rpm  243kW (330PS) /7,000rpm  247kW (336PS) /7,000rpm  261kW (355PS) /7,400rpm  246kW (335PS) /7,000 rpm  239kW (324PS) /7,000rpm
Maximum torque	363N m (37.0kgf m) / 5,200rpm  361N m (36.8kgf m) /5,200rpm  365N m (37.2kgf m) / 5,200rpm  374N m m (38.1kgf m) /5,200rpm 366N m (37.3kgf m) /5,200rpm  362N m (36.9kgf m) /5,200rpm 360N m (36.7kgf m) /5,200rpm

The Nissan VQ37VHR is a high-revving V6 petrol engine manufactured by Nissan. It is tuned by a completely different manufacturer depending on the vehicle model, and as of 2020, the model that was installed in the Fairlady Z34 type until a minor change in 2022 is used as a naturally aspirated V6 engine installed in commercial vehicles. boasted the world's highest output.

History

It is the flagship engine of the naturally aspirated model currently manufactured by Nissan, and was first adopted in the North American specification Infiniti G37 Coupe released in August 2007. In Japan, it was installed for the first time in the CV36 Skyline Coupe, which is the Japanese specification of the same car. When installed in the Skyline Coupe, the displacement was increased by 200cc from the conventional 3.5L to 3.7L.

Although the 200cc displacement increased output and torque compared to the VQ35HR or VQ35DE engines, the new technology of the variable valve mechanism VVEL (Variable Valve Event & Lift: a system that continuously varies the valve operating angle and lift)) has improved fuel efficiency. And until then, each model equipped with the old-generation VQ35HR type engine has been changed to the VQ37VHR type engine due to a full model change or a minor change. Although it is based on the VQ35HR, more than 35% is a new design, making it a de facto new engine.

It is a high-power 100% high-octane gasoline engine that was announced at the dawn of next-generation automobiles such as hybrid engines and electric vehicles, and many people say that it is a masterpiece of domestic naturally aspirated engines. It is a high-revving engine with a red zone starting at 7,500rpm, and the intake and exhaust systems are symmetrical and independent.

The VVEL, which is a variable valve mechanism, has a high degree of freedom, and the characteristics of the engine differ greatly depending on the model due to the adjustment of the engine body and each part by Nissan. As for horsepower, it rises straight according to the number of revolutions like a naturally aspirated engine, and the torque characteristic rises sharply from about 1,500 rpm and becomes almost flat from about 3,000 rpm to the red zone. The sedan type is smoother, the skyline type is sportier, and the Fairlady Z34 type has the original performance of the engine. In fact, the acceleration force and operability are completely different, and the critic Yasutaka Gomi describes the VQ37VHR installed in the Fairlady Z34 as "the masterpiece of the NA engine”.

Depending on the intake/exhaust system and ECU settings, the engine itself can produce a high output of 400PS or more in a completely stock state without any mechanical tuning. Therefore, in consideration of fuel efficiency and durability of the engine, the car equipped with the genuine state has a computer setting that considers the output and narrows the diameter of the exhaust system to greatly suppress the output. In the planning of the magazine, the Fairlady Z34, which was produced by Powerhouse Amuse and had only the ECU re-set and the intake and exhaust system replaced, demonstrated an output of 390PS, which is more than 100PS higher than the genuine measured value.

The fuel used is exclusively for unleaded high-octane gasoline, and if regular gasoline is used, an extreme decrease in output and various disadvantages are likely to occur. Therefore, the use of regular gasoline is basically prohibited unless high-octane gasoline is not available.

It is recommended that the engine oil used is 100% chemically synthesized oil containing genuine esters, or oil with a starburst mark for higher performance oil in the API standard. Depending on the car model, Mobil 1 (VR38DETT designated oil for R35) may be recommended by authorized dealers.

Like the predecessor VQ35HR type, it bears the initials of "HR", which stands for "High Revolution" and "High Response".

Equipped vehicle

Nissan Skyline Coupe CV36

Infiniti G37 Coupe

Nissan Skyline sedan V36 type -370GT (December 2008-)

Infiniti G37 sedan

Nissan Skyline Crossover

Infiniti EX37 (European model)

Infiniti FX37 (European model)

Infiniti G37 Convertible/G37 Cabrio

Nissan Fuga KY51 - 370GT / 370VIP

Infiniti M37

Mitsubishi Proudia BKY51

Nissan 370Z Fairlady Z Z34