Concerns about VQ35HR - Nissan 350Z Forum, Nissan 370Z Tech Forums
User Tag List

Reply
 
LinkBack Thread Tools Search this Thread
post #1 of 13 (permalink) Old 07-20-2006, 04:20 PM Thread Starter
Touring Member
 
dave's Avatar
 
Join Date: Apr 2005
Location: Techâ„¢
Posts: 610
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
Well, some people might be wondering what this new engine for the 07 350z is about. Reading up on sites, I found it not to be a completely new engine, rather heavily revised from the last version, as it is over 85% new. This is the same engine that was announced for the new G35 sedan, and at the time was only said to put out 310 hp (again not a big bump in HP, but rpms have increased by about 1k).
NISSAN announced the following specifications:
  • New design cylinder block. The rudder frame was added, rigidity was raised substantially.
  • Left and right complete symmetrical inhalation and exhalation air system
  • Decreasing the friction worldwide first hydrogen free DLC (Diamond Like Carbon) with coating.
  • Setting electromagnetism VTC on exhaust cam side in addition to the oil pressure VTC of air inlet cam side.
  • Isometric exhaust manifold
Only the '07 G35 and '07 350z will have the new VQ35HR motor.
This new engine has increased response and rpms, this allows it to max out at the 7500 rpm redline ("HR" most likely meaning High Rev or Higher Rev) vs 6600 rpm (on 2006 and older 350z) and have improved top end power.
More information can be found here, scroll to the bottom:NissanNews

How does this apply to the GT-R? Well, the engine might just be the reworked and renamed VQ that everyone is talking about. All it is missing would be FI (forced induction). In that case then, it would be named something like VQ35HRTT, but of course we expect a 3.6-3.8 bump, so it can be FZ38HRTT, all speculation really.
dave is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 07-20-2006, 05:42 PM
Performance Member
 
Join Date: Jan 2006
Location: VI
Posts: 370
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:

How does this apply to the GT-R? Well, the engine might just be the reworked and renamed VQ that everyone is talking about. All it is missing would be FI (forced induction). In that case then, it would be named something like VQ35HRTT, but of course we expect a 3.6-3.8 bump, so it can be FZ38HRTT, all speculation really.
as i pointed out in a previous post, GT-R production is less than 10 months behind VQ35HR production(!)
i'm not sure we'll see an increase in displacement for the GT-R and i definitely don't think its necessary.

a drop in compression, combined with direct injection and the ability to spin higher (8k rpms), with improved cooling and lubrication would be more than enough to do that job imo...
tekknikal is offline  
post #3 of 13 (permalink) Old 07-20-2006, 05:52 PM
Grand Touring Member
 
harshfury's Avatar
 
Join Date: Jan 2006
Location: Southern California (la habra)
Posts: 1,237
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Send a message via AIM to harshfury
Not a significant increase in HP. But when you consider it over the past two years, it has gone up by 23HP...if it continued at that rate, it is pretty significant.

Is there a loss in torque again?


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
harshfury is offline  
 
post #4 of 13 (permalink) Old 07-20-2006, 06:17 PM
Performance Member
 
Join Date: Jan 2006
Location: VI
Posts: 370
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Not a significant increase in HP. But when you consider it over the past two years, it has gone up by 23HP...if it continued at that rate, it is pretty significant.

Is there a loss in torque again?
no torque loss is expected.

i'd say there is a significant increase in power.

the nonrevup engine really produces 275hp / 268lbft
the revup engine really produces 293hp/258lbft

if this new engine produces 306hp i'd call that significant

you'd be getting more torque than the nonrevup engine and you'd have a wider flatter torque curve. power would increase more linearly and where old one stopped at 6500rpms, this one would continue for another thousand rpms.

so the increase from the 03Z is more like 31hp, with a wider powerband. the improved airflow and variable timing systems should keep the engine responsive to modificiations as well.
tekknikal is offline  
post #5 of 13 (permalink) Old 07-20-2006, 06:29 PM
Grand Touring Member
 
harshfury's Avatar
 
Join Date: Jan 2006
Location: Southern California (la habra)
Posts: 1,237
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Send a message via AIM to harshfury
sounds great.

I have the rev-up '06 motor. I have a feeling that with each release, I'll wish I had the newest one.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
harshfury is offline  
post #6 of 13 (permalink) Old 07-20-2006, 06:33 PM
Performance Member
 
Join Date: Jan 2006
Location: VI
Posts: 370
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
actually - the new engine is confirmed 306hp.....i will edit my post above accordingly
tekknikal is offline  
post #7 of 13 (permalink) Old 07-20-2006, 07:36 PM
Administrator
 
toykilla's Avatar
 
Join Date: Jan 2004
Location: Fort Worth, TX
Posts: 16,332
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Send a message via AIM to toykilla Send a message via Yahoo to toykilla
https://www.350z-tech.com/zwiki/VQ35HR

The major point of note is that it is the same engine, with a stronger block, higher redline, and new technologies added. Drop the compression, add turbos, and there is your GTR motor.

AIM: jbass350z

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
toykilla is offline  
post #8 of 13 (permalink) Old 07-24-2006, 11:20 PM
Base Member
 
Join Date: Feb 2006
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
The major point of note is that it is the same engine, with a stronger block, higher redline, and new technologies added. Drop the compression, add turbos, and there is your GTR motor.
Don't forget Cosworth's patented casting process!
vquick is offline  
post #9 of 13 (permalink) Old 07-25-2006, 12:02 AM
Administrator
 
toykilla's Avatar
 
Join Date: Jan 2004
Location: Fort Worth, TX
Posts: 16,332
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Send a message via AIM to toykilla Send a message via Yahoo to toykilla
Quote:
Don't forget Cosworth's patented casting process!
are they involved with the engine design?

AIM: jbass350z

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
toykilla is offline  
post #10 of 13 (permalink) Old 07-25-2006, 01:17 AM Thread Starter
Touring Member
 
dave's Avatar
 
Join Date: Apr 2005
Location: Techâ„¢
Posts: 610
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
Quote:
are they involved with the engine design?
Indeed, if I recall correctly. Have been designing the GT-R engine since 2003.
dave is offline  
Sponsored Links
Advertisement
 
Reply

Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome