VQ35HR

From Nissan 350Z & 370Z Wiki

Welcome to the VQ35HR engine portal. This engine is the 4th generation in the VQ series motors and it is confirmed to be in the 2007 model 350Z, and the 2007 model Infiniti G35 Sedan. As of now, the 2007 Infiniti G35 Coupe will not receive the VQ35HR engine, but will keep the VQ35DE Rev Up engine it had during 2006. The 2008 Infiniti G35 Coupe will receive the larger displacement VQ37HR (available mid-2007). There are significant differences to this new engine due to a different method used to calculate power output, side by side comparisons of the VQ35HR and VQ35DE engines is difficult.

This engine will be both found in both Infiniti and Nissan vehicles.

There is also a 2.5L variant called the VQ25HR.

Available in: 2007 G35 Sedan, 2007 350Z

See the internal presentation: VQ35HR Presentation

Nissan has built an entire new factory to manufacture the new VQ35HR.

VQ35HR name break down

VQ is the V6 series engine

35 stands for the 3.5L displacement

HR is the designation of the 4th generation series and stands for High Response and/or High Revolution

Contents 1 Articles 2 Overview 3 Press Release 4 Specifications 4.1 Continuously Variable Valve Timing Control System (CVTCS) 4.1.1 Hydraulic on intake cam 4.1.2 Electromagnetic on exhaust cam 4.2 Twin-intake system 4.3 Nissan Direct Ignition System (NDIS) 4.4 Electronic drive-by-wire throttle 5 Aim of the next generation VQ35HR engine 5.1 High Revolution Rate 5.2 Pleasant Acceleration Sound 5.3 Top Level Power Performance in Class 5.4 Improved Fuel Efficiency 5.5 Best-in-class emissions standadard 6 Images 6.1 Official Nissan Pictures 6.2 Official Nissan Pictures 2 6.3 Spy Shots 6.4 JWT Spy Shots 7 Speculation 8 Notes 9 Other News Postings 9.1 Response Japan (Translated)

Articles

• Ward's Article on the VQ35HR
• Nissan Performance Magazine on the VQ35HR

Overview

This is a general overview of the new and/or changed features in the VQ35HR engine. No single improvement makes this engine great, but the combination of over 40 significant changes have drastically altered the VQ into the next generation engine. The VQ35DE stood on the Ward's 10 Best Engines list for over a decade. Expect the VQ35HR to continue the tradition.

HR stands for High Response (or High Revolution) 5th Generation of the VQ. Redline increase to 7500rpm Higher compression ratio: 10.6:1 (previously 10.3:1) Redesigned block for increased rigidity: ladder frame reinforcment Increased height of cylinder blocks New cylinder heads Improved coolant system flow Worldwide first hydrogen free DLC (Diamond Like Carbon) coating for lowered frictionon valve lifters Stronger valve springs Larger valve diameters Hydraulic CVTC on intake side Electromagnetic CVTC on exhaust side Adoption of isometric exhaust manifold Equal length exhaust manifold

Reinforced Chain cover Sound insulating engine cover New oil pump rotor Reinforced oil pan Enlarged crank journal diameter Enlarged diameter crank pin Twin knock sensors Symmetric intake system Straight inlet port Iridium spark plugs Spark plug modified into M12 Asymmetric piston skirt Longer Conrod Processing PVD Piston Ring

Press Release

NISSAN DEVELOPS NEW-GENERATION V6 ENGINES --Engines to power all-new Skyline to be released this autumn--

TOKYO (Aug. 22, 2006)--Nissan Motor Co., Ltd., has newly developed two new-generation six-cylinder V-type engines for front-engine, rear-wheel-drive vehicles featuring powerful performance and improved environmental friendliness.

The 3.5L VQ35HR and 2.5L VQ25HR engines will be built at Nissan's Iwaki Plant in Fukushima Prefecture and will be equipped in the all-new Skyline to be released this autumn in Japan, as well as the US where the model is sold as the Infiniti G35.

Featuring newly designed engine blocks and other key components, the engines offer smooth transition to top-in-class level engine speed of 7,500 revolutions per minute drawing upon the "smooth transition" concept of the popular VQ engine, the only engine in the world to appear on Ward's 10-Best Engines list for 12 consecutive years.

The engines achieve a 10% improvement in fuel efficiency compared to vehicles equipped with the existing VQ engine and top-in-class Super Ultra-Low Emission Vehicle level emissions. SU-LEVs have 75% or less nitrogen oxide (NOx) and hydrocarbon (HC) emissions than those stipulated by Japan's 2005 exhaust emission standards.

The letters "HR" in VQ35HR and VQ25HR stand for "high revolution" and "high response."

Nissan began VQ engine production in 1994 and has produced a cumulative total of 5.5 million units as of last fiscal year, ended March 31, 2006.

Main specifications of the VQ35HR and VQ25HR engines:

Smooth transition to top-in-class level engine speed of 7,500 rpm

• Reduction of weight and friction through adoption of asymetrical piston skirt configuration
• Reduction of piston-side force through lengthening of con rod
• Addition of rudder frame, newly-designed cylinder block with significantly improved rigidity

Thrilling revving sound and top-in-class output

• Adoption of perfectly symmetrical intake system
• Adoption of continuously variable valve timing control (CVTC) for intake side and electromagnetic valve timing control (e-VTC) for exhaust side
• Reduction of intake resistance through adoption of symmetrical twin intake system and straight intake port
• Adoption of isometric exhaust manifold and perfectly symmetrical exhaust system

Improvement of fuel-efficiency and emission cleanliness

• Reduction of friction through adoption of world's first hydrogen-free, diamond-like carbon (DLC) coating
• Adoption of catalyst substrate with ultra-low heat mass, super-ignition iridium spark plug and fast light-off O2 sensor control

Specifications

The VQ35HR specifications are listed here.

• Compression: 10.6:1
• Redline: 7500rpm
• Horsepower: 306hp @ 6800rpm (reminder of new power rating methods)
• Torque: 268ft-lb @ 4800rpm
• Valves: 24
• Bore: 95.5mm
• Stroke: 81.4
• Intake Camshaft Duration: 248
• Intake Camshaft Lift:
• Exhaust Camshaft Duration: 248
• Exhaust Camshaft Lift:

Continuously Variable Valve Timing Control System (CVTCS)

Hydraulic on intake cam

Electromagnetic on exhaust cam

Twin-intake system

Nissan Direct Ignition System (NDIS)

Electronic drive-by-wire throttle

Aim of the next generation VQ35HR engine

The aim of the next generation VQ35HR and VQ25HR series engines has 5 main points. An increased maximum RPM limit of 7500 is realized. Improved sound during acceleration was also one of the key design criterias. Read below to see the key points of improvement and how they have been achieved on the new VQ35HR and VQ25HR engines. High Revolution Rate Reduced friction and vibration at high speeds Smoother piston action Installation of ladder frame on block Extension of conrod length By minimizing piston inclination, friction is reduced Asymmetric piston skirt Skirt width reduced on side with least amount of pressure resulting in reduced friction. Pleasant Acceleration Sound Linear and clear acceleration sound in response to engine RPM. Reinforced sound clarity with reduced noise. Symmetrical Intake and Exhaust system Aids the production of clear and powerful sounds at high RPm. Twin intake Twin exhaust

Top Level Power Performance in Class Improvements in intake, exhaust, and combustion Reduced intake resistance by 18% Utilize VTC intake and exhaust controls on both sides Suppresses exhaust loss Dual intake and exhaust system Straight intake port High degree of flexibility in setting valve timings Improved Fuel Efficiency Over 40 improvements raise fuel efficiency by 10% Reduced air resistance Improved alternator generating efficiency Reduced electrical consumption Reduced vehicle weight Reduced hub/axle rpm resistance more... Best-in-class emissions standadard Ultra low heat mass catalyst shorten catalyst activating time Atomizing fuel injector Reduce engine-out emissions Highly ignitable irridium spark plugs Reduce engine-out emissions Early activating A/F sensors Control System Makes control of theoretical air fuel ratio possible immediately after starting

Images

Official Nissan Pictures

Nissan VQ35HR	Infiniti VQ35HR	Dual Intakes	Exhaust Manifold
Dual Exhaust System	VQ35HR Block	VQ35HR Connecting Rod	VQ35HR Connecting Rod
VQ35HR Piston	VQ35HR Piston

Official Nissan Pictures 2

Nissan VQ35HR Engine	Infiniti VQ35HR Engine	Upper Block	Lower Block
Ladder construction	Head from beneath	Head from above	Plastic intake manifold
Also called plenum	Crankshaft	Crankshaft	Piston from above
Piston from below	Throttle body	The second throttle body	Conrod
Connecting Rod	Exhaust manifold	Equal length tubing
Iridium spark plug

Spy Shots

Install on G35 Sedan

Install on G35 Sedan

JWT Spy Shots

Special thanks to JWT for taking apart this VQ35HR so fast. You can't even buy a car with this engine yet! We get to see first hand the complete redesign of the intake system. Gone is the cast aluminum intake plenum. New is the dual intake system including dual airboxes and throttle bodies. The new intake plenum is plastic! and oddly square! ?

VQ35HR uncovered	In the Engine Bay	Dual Intakes	Plenum Off
The bare VQ35HR
		VQ35HR Airbox
		eVTC Electromagnetic Variable Timing Control	Injectors
Injectors		Muffler	Dual Exhaust Piping

Speculation

The engine is being introduced first in the G35 Sedan and 350Z as a 3.5 liter powerplant. However the significant improvements in this engine will most likely be carried over into the other vehicles eventually as well as various displacements. It is also likely the improvements will be introduced into the Nissan VK series V8 engines.

Notes

New factory established for the sole purpose of VQ35HR and VQ25HR engine production.

The 2007 G35 Sedan was the first car announced to have the Nissan VQ35HR engine. Some recent spy pictures show the G Sedan has a true dual exhaust system. This is insightful as to what the new Z will come with: true dual. This may be what Nissan has referred to as the symmetrical intake and exhaust systems.

Other News Postings

Response Japan (Translated)

The nissan VQ engine new model output 315PS

2006 August 30th

The Nissan Motor Co., Ltd. technical announcement did on the 22nd, the new “VQ” serial V6 engine. The fact that first it is loaded is the next term 'skyline which is announced to the fall'. If you mention “the skyline”, in the Japanese market whatever saying, the image of the sport sedan is strong.

The new VQ engine the light response, engine sound, cleanliness conversion of fuel economy and the waste gas has pursued and, efficiency multilaterally, but those where than what it is more strongly required because image of the sport sedan is satisfied probably are the output characteristics which actualize the height of power efficiency.

Power efficiency of the car is decided not only the engine, efficiency and gear ratio and the car of the transmission weight and so on, by the various primary factors.

As for Akagi Yutaka history main bearing of the power train first development department which takes charge of the design, as for power efficiency there is a self-confidence, class top “concerning the next term skyline. 0-60 mile /h (0-96km/h) as for acceleration, in domestic 3.5 liter model most fast class. You think” that with intermediate acceleration efficiency the top is done, that, self-confidence is shown.

The specifications are not published yet, but highest output is expected that specific output per 1 liters in aerodynamic volume displacement in general becomes approximately 90ps. In regard to calculation at 3.5 liters approximately 315ps. This reaches 3.5 liters “2GR-FSE” and the even number which the Toyota Motor Corporation has adopted for rec suspension 'GS', same 'IS' and the Toyota 'Crown' etc.

Source: http://response.jp/issue/2006/0830/article85413_1.html

Reflection to the NISSAN VQ engine new model type designation

2006 August 29th

Keeping the Nissan Motor Co., Ltd., full the new model V6 engine “VQ35HR” which it appears (3.5 liters in aerodynamic volume displacement), “VQ25HR” (2.5 liters in aerodynamic volume displacement). But very type the same as the current 'skyline' on-board machine VQ, in fact another engine is the NISSAN insistence.

You say that moving part other things such as piston and connecting rod and dynamic valve system, 8 tenths of principal part are the new design, with the engine block which is renovated extensively. The majority of 2 tenths which remain being able to meet, is with something which does not have the necessity of redesigning.

“Also an argument that there was a tracing paper ocean routine work of the development patsy it should make new type designation, but we forced to the type designation, VQ and you say we had the reflection, could meet and made succeed the name of VQ”.

High appraisal was received e.g., the VQ engine to FF it was converted in 94 being loaded 'by [sehuiro]', later, receives improvement such as direct injection conversion and electromagnetic variable valve timing mechanism adoption briskly, is elected to “Ward's 10 Best Engines” of the American [wazu] corporation with 12 year continuation. The nissan thinking where is visible to brand we would like to convert the type of VQ, the walking such as that as a backbone.

The new VQ series that the light response, it stood side-by-side the engine sound which does not have the turbidity and such as fuel economy and clean waste gas efficiency, is required to the next generation engine low the factor which at high dimension. The way of the completion and how.

Source: http://response.jp/issue/2006/0829/article85371_1.html

As for the NISSAN VQ engine new model 0-100km/h acceleration a little more than 1 second shortening

2006 August 22nd

The Nissan Motor Co., Ltd. 22 days the new generation V type 6 cylinder engine "VQ35HR" which is announced (3.5 liters) with "VQ25HR" (2.5 liters), continual variable valve timing mechanism to inhalation and exhalation of air both sides (CVTC) raised largely with the improvement of advancement and the friction and pumping loss etc. of control of the combustion with adoption, output and fuel economy efficiency in comparison with old type.

The new engine is loaded first the new model ' skyline ', but from takeoff until 100km/h a little more than 1 second it shortened time, both 2.5 and 3.0 liter engine, in comparison with the engine on-board car until recently.

In case of 3.0 liters, you say that it reaches to 100km/h in approximately 6 seconds. As for CVTC inhalation side hydraulic system, exhaust side has made electromagnetic system.

With friction decrease inside the cylinder, it makes the size of the connecting rod long, connects to the friction pressure reduction to the piston. In addition, skirt width small was designated as the form which controls the paragraph and resistance the skirt section of the piston (lower part) form concerning the part whose surface pressure is small.

Source: http://response.jp/issue/2006/0822/article85094_1.html

The acceleration sound which is force with the NISSAN VQ engine new model clearing

Line

2006 August 22nd

The Nissan Motor Co., Ltd. 22 days is announced the FR car private new generation V type 6 cylinder engine "VQ35HR" which (3.5 liters) with "VQ25HR" (2.5 liters), is tradition of the VQ series "you blow lightly and smoothly rises the engine which" theme. With output and environmental efficiency this time, being thorough, what it pursues says "the acceleration sound whose feeling is good" (the tracing paper ocean routine work) with.

In order to pull out the acceleration sound which does not have the turbidity, the inhalation exhaust system which is loaded onto the vehicle the twin who does complete symmetrical shape (the muffler 2) has made system. Is audible with the driver's seat as for the acceleration sound which occurs the case of inhalation and exhaust the sound which large portion.

As for the tracing paper routine work "as for the inhalation and exhalation of air system, those like the flute. In case of twin system, that length of the tube is different in left and right, sound is easy to become turbid ", that you say. Then, when the new model ' skyline where this engine is loaded ' is, the exhaust system with left and right is designed in complete symmetrical shape.

Source: http://response.jp/issue/2006/0822/article85090_1.html