VQ35HR photos and sound clip from Nissan

[helldorado]

Thanks to r391 for the original links under Nissan/Infiniti Past, Present, & Future
http://forums.freshalloy.com/showthread.php?t=154922

Play VQ35HR sound sample
Download VQ35HR sound sample

High Quality image version

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

[Afty]

That VQ25HR would make a nice engine for an entry-level Infiniti...

[lowrider]

I've seen the dual intakes before, but check out the headers. Looks like real tube headers.

Lou

[helldorado]

Originally Posted by lowrider

I've seen the dual intakes before, but check out the headers. Looks like real tube headers.

Lou

That's what I noticed as well. Looks like they are equal length as well. I wish they had a pic without the engine cover so we could see the plenum design. I'm curious if the 2 TB intakes merge, but I would imagine it would be ideal if they both fed 3 cylinders each.

[helldorado]

Also, great find by camber on these pics. All back in the original thread I linked to.

[JayG35]

Though the sound clip is a bit muted (obviously taken from the interior), I'm very pleased with the way this engine sounds. Sounds very, very similar to an e90's inline 6 under acceleration. Perhaps the smoothness of the original 3-liter VQ is finally back.

[InfiNissan Lover]

Oh wow! The new VQ sounds awesome and IRIDIUM SPARK PLUGS FROM FACTORY!!! Nissan is definitely upping its levels of performance and precision. It sure is good to see what they are doing with all that money they made.

Judging from the x-ray like pictures, I feel that the dual exhaust setup could benefit from a thicker pipe where the exhaust from the engine connects and from where the pipes exit to the mufflers. It almost seems like it is being choked.

It is very impressive to read what Nissan has managed to do with the new VQ. Super Ultra Low Emission Vehicle? That is VERY impressive given how Nissan kept high performance numbers too. The first of you to get this car are sure gonna be lucky. Hopefully Nissan will bring out the G37 with a 6-speed auto and a 7-speed manual, that would be nice indeed.

Great job getting all the info you guys, thanks!

[SukairainKupe]

Wow, twin intake is pretty sweet, and that new header looks promising. With all the improvements I am surprised the new VQ isn't making at least 320hp. (Actually it probably does, but Nissan has a bad habit of underrating engine the first couple of years and slowly up it to piss off its competitors)

VQ35 - released with 260hp, moved up to 280hp, and now 298hp.....

7 speed manual........ now why would you want that? I am not even sure what my 4th gear is for on the 6MT.

[dklau33]

Wonder if the new headers are equal length or close to it?

[JayG35]

Originally Posted by SukairainKupe

Wow, twin intake is pretty sweet, and that new header looks promising. With all the improvements I am surprised the new VQ isn't making at least 320hp. (Actually it probably does, but Nissan has a bad habit of underrating engine the first couple of years and slowly up it to piss off its competitors)

VQ35 - released with 260hp, moved up to 280hp, and now 298hp.....

7 speed manual........ now why would you want that? I am not even sure what my 4th gear is for on the 6MT.

Actually it is making close to 320hp by the old standard IIRC.

Can't wait for the 3.7L in the coupe.

[Jspeed]

Originally Posted by Afty

That VQ25HR would make a nice engine for an entry-level Infiniti...

Ditto. A 2.5L 4-cylinder just doesn't work well for a luxury brand.

Nissan could use this engine too. The current long-stroke, non-rev-happy QR needs to go.

[camber]

Errmmmm.. Not sure why my post was combined with a thread called the sound of the VQ35HR....

Anyways more pics!

[ZYAL8R808]

I'm not getting the VQ25HR. Why would Nissan be making a 2.5 liter V4? I don't think anyone has ever made a "V4". I think the only 4 cylinder cars ever have had either an In-line 4, Boxer 4 or Flat 4 engines. Unless it's a 2.5 liter V6. Everyone knows that Nissan's "V" engines have been some form of V6. Anyone know what this is all about?

[BC_Shelby]

Originally Posted by JayG35

Actually it is making close to 320hp by the old standard IIRC.

Can't wait for the 3.7L in the coupe.

Who said the coupe is getting a 3.7L engine...?

[MrSE_R]

Originally Posted by ZYAL8R808

I'm not getting the VQ25HR. Why would Nissan be making a 2.5 liter V4? I don't think anyone has ever made a "V4". I think the only 4 cylinder cars ever have had either an In-line 4, Boxer 4 or Flat 4 engines. Unless it's a 2.5 liter V6. Everyone knows that Nissan's "V" engines have been some form of V6. Anyone know what this is all about?

People, "read carefully":

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 2.5L is a "V6"

[ZYAL8R808]

I was responding to Jspeed who referred to it as a 4 cylinder. My bad MrSER. I never got hooked on phonics.

I wonder what they are planning on using this new VQ25HR for. Could it be for the upcoming Infiniti CX and new compact Nissan SUV? Or could it be for a Sentra SER (doubtful)? Can't wait to see more specs on this motor.

[camber]

I like this picture. I believe they are showing how increasing the length of the connecting rod and the asymetrical piston skirt decreases side load and friction. I think the VQ35HR has some more suprises in store. Don't be suprised if the redline is rasied in later iterations.....

It will be interesting to see how the 3.7L V6 turns out and applied. Will the VQ35HR be a stop gap for Infiniti and filter down into Nissan FWD sedans?

Will this be the last iteration of the VQ?

IMO the modifications done to VQ35HR will keep it around for a while.




In this picture we can see that the VQ35HR outclasses a VQ35DE 0-62.5 mph by a full second. Although, the accerlation times seem to be slow for a VQ equiped G/Skyline. Also, the top graph seems to be acceleration G force of the two engines??

I'm not sure I can't read Japanese well.

[ChicagoX]

Originally Posted by ZYAL8R808

...........I don't think anyone has ever made a "V4". I think the only 4 cylinder cars ever have had either an In-line 4, Boxer 4 or Flat 4 engines. Unless it's a 2.5 liter V6. Everyone knows that Nissan's "V" engines have been some form of V6. Anyone know what this is all about?

Saab made a few V-4's as well as Ford of Europe. Tatra had a rear-mounted, air-cooled V-4. Not the smoothest engines without a full compliment of balance shafts.

The 2.5 is a small v-6. Don't forget Mazda's wee 1.8l v-6 from a few years back. That was TINY!

[Jspeed]

Originally Posted by ZYAL8R808

I was responding to Jspeed who referred to it as a 4 cylinder. My bad MrSER. I never got hooked on phonics.

Read my post again more carefully.

[Afty]

Originally Posted by ZYAL8R808

I wonder what they are planning on using this new VQ25HR for. Could it be for the upcoming Infiniti CX and new compact Nissan SUV? Or could it be for a Sentra SER (doubtful)? Can't wait to see more specs on this motor.

Overseas, they have had a 2.5L V6 version of the VQ for years, and I believe they even used it in the current-gen Skyline. I know that the Cefiro (our Maxima/Altima) used to be available with a 2.0L VQ V6 in Japan and other Asian countries.

A small Infiniti with the VQ25HR would be a great competitor for the Acura TSX. Or they could put it in the G and sell a G25 to compete with the IS250 and 325i.