I meant to post this on here but personally I own a G so I got a little mixed up

http://g35driver.com/forums/engine-d...omparison.html

 

water pump pulley is different it is underdriven for the HR since the higher revlimit
heads are completely different... valve size, port design, and cam sensor location
location of the crank sensor is different
crankshafts are diffent, same stroke yes, main and rod journals are bigger

 

id have to disagree a little bit, the water pump physically fits, the valves on each head are both 37mm intake and 31.5 exhaust. as far as the heads being completely different, they're actually more similar to the original DE heads than my rev-up heads but the only difference is the came sensor position, I'm not a flow master so I can't exactly measure flow but the runners leading to the heads are the only things that seem ported, and the exhaust side is a little bigger. I'll take your word on the crank though =)

 

Interesting stuff. Thanks for the link.

 

Found this from old *Down Under* Article:

GODZILLA'S COMING
Fitting snugly into the 350Z engine bay, Nissan's new generation VQ35HR V6 is an evolution of the long-running VQ35DE.

While sticking to the same configuration, bore/stroke and 3498cc capacity, the HR engine features an array of new internals to reduce weight, lower friction and push maximum revs up 500rpm to 7500rpm.

The HR has a stiffer block, lightweight pistons and con rods, and bigger crank journal and pin to enable it to rev higher. To boost driveability, it gets continuously variable valve timing control (CVTC) on the intake side, and electromagnetic valve timing control (e-VTC) on the exhaust side. The current V6 has only variable timing on the intake side.

The spec continues with new symmetrical intake and exhaust systems and, as part of the power shift up to 230kW, engine compression ups from 10.3 to 10.6. It's a big list of changes for an engine which comes with similar emission and economy ratings as the old DE.

 

I wish this thread was longer becasue I love reading this stuff. Thanks alot for the info and I'm subscribed.

 

had some extra time in between working on customer cars to feed my own curiosity...I have more information on the oil pump...comparison between the original, rev-up, and HR...and a little more information about the heads!

 

i read it, thats great information . Props for doing the research. I may have missed it but do you have a race car or something ? lol

 

haha no...well...on the inside it is...but on the outside its just my little daily...

http://g35driver.com/forums/media-sh...lots-pics.html

 

very nice sir, i like it. looks stock lol

 

thanks, the picture is a little old...probably should keep up with my own build thread better but I'm trying not to be too flashy..

 

I have a copy of a .pdf from Nissan's presentation of the DE and HR comparison. It's 50 pages with lots of cool details like dual knock sensors, asymetrical piston skirts, lengthened connecting rods for less sideways pressure, etc with some rough diagrams. I'm not sure how/where to post that.

 

Hi there,
First post for me in here. So please bare with me.
I have been looking for as much information as I can find on the engine mounting position in the vqde vs vqhr.
There's a lot of info out there on various sensors and the engine layout etc. However I have heard that the the engine position is better in one as it balances the car better. Both owners that I know are generating similar power after modifications. And both love their cars for individual reasons.
I have been told by one owner that the de is better because its lower in the engine bay so the centre of mass is lower to the ground and another that the hr is better because its farther back in the engine bay between the wheels which distributes the weight better....
Please, please, please help with any info you can. I am about to start a year long project with my 350 and any info that you can share could save me some time and money.
Thank you.
G.

 

They fit in the same place, the HR is taller than the DE, not cause it's mounted differently, cause of its deck height.

 

What is this project?

 

I thought both blocks are identical. And the bump in the hood on the hr is due to the different mounting position...

 

Complete upgrade from ground up.
From suspension kit, full exhaust system, intake and cooling, fuel system, brakes and wheels to stroker kit and big turbo. Its completely stock atm.
Lots to do but looking forward to getting it started.

 

Bro, you fron Des Plaines in Illinois?
I lived there about 15 years ago. Myself and a few friends from Ireland were doing blacktop and sealcoating driveways.

 

I used to live there but I moved a few years back.
what engine is in the car, is it that your are trying to swap or just wondering the difference?

 

They are very different engines like 90% different.