SR20DEN

iTrader: (7)

Nissan finally posted the service manuals for the 2007 Altima and 2007 G35 Sedan.

The VQ35DE in the 2007 Altima appears to have slightly better cams than previous VQ35s.


For a reference here is the previous cam data for 2002-2006
Engine: VQ35DE (2)
CVTC: Intake

Intake__Lift: 9.5mm
Exhaust_Lift: 9.5mm

Intake__Duration: 238º
Exhaust_Duration: 240º

Intake_Opens: 6º ATDC
Intake_Closes: 64º ABDC

Exhaust_Opens: 52º BBDC
Exhaust_Closes: 8º ATDC

Overlap: 2º


And here is the 2007 Altima cam data
Engine: VQ35DE
CVTC: Intake

Intake__Lift: 10.0mm
Exhaust_Lift: 10.0mm

Intake__Duration: 240º
Exhaust_Duration: 240º

Intake_Opens: 10º ATDC
Intake_Closes: 70º ABDC

Exhaust_Opens: 50º BBDC
Exhaust_Closes: 50º ATDC

Overlap: 0º

So it appears they've added 2º of duration to the intake cam and retarded it by 4º, advanced the exhaust cam by 2º and added 0.5mm of lift.

I have pictures of this engine on display at the Detroit auto show which say the following:

New Generation VQ Engine
- New Twin Induction
- Microfinished crank journals and cam lobes
- Ultra-low friction Diamond-like (DLC)
- Wider CVTC Separation Angle


I assume that means this thing might have the 55º CVTCs.


This engine also has different (smaller) valves.
Valve intake diameter: 36.6-36.9mm (vs. 37.0-37.3mm)
Valve intake length: 97.13 (vs. 96.46)
Exhaust valve diameter: 30.2-30.5mm (vs. 31.2-31.5mm)
Exhaust valve length: 94.67 (vs. 96.81)

Stem diameters are the same.

The Valve springs are slightly softer.

The connecting rods are the same dimensions.

There is a 3mm "a" height dimension shortage in the new pistons. But the end points are not clearly defined in the Nissan manuals, so this might be irrelivant.

The ESM listed spark plug is now the Denso FXE20HR11

This engine has ONE serpentine belt to drive the accessories, not two like we're all used to. That means your old VQ UDP probbaly won't have the right offset and any UDP put on this engine will also under drive the power steering.



The 270hp Altima also comes with a CVT with ratios from 2.371-0.439:1 and a final drive of 5.173.
So if this CVT can handle the 270hp I want to know who needs to be fired at NNA for limiting the Maxima CVT to 255hp.


The Manual 6 speed transmission is now the RS6F52A vs. the old RS6F51A. It appears to use the same gear ratios and at this point the only difference I know of is that reverse is now left top (BMW style). I'll post more on that later if I can find anything worth mentioning.

SR20DEN

iTrader: (7)

2007 VQ35HR

The VQ35HR has slightly different cam timings than the VQ35DE 'Revup'.

VQ35DE 'Revup' cam data

Engine: VQ35DE (3)
Model Years: 2005-2006 (G35mt, 35th Anniversary 350Z)
CVTC: Intake and Exhaust

Intake__Lift: 10.5mm
Exhaust_Lift: 10.5mm

Intake__Duration: 248º
Exhaust_Duration: 248º

Intake_Opens: 2º ATDC
Intake_Closes: 70º ABDC

Exhaust_Opens: 70º BBDC
Exhaust_Closes: 2º BTDC

Overlap: -4º
----------------

VQ35HR

Engine: VQ35DE
CVTC: Intake and Exhaust

Intake__Lift: 10.5mm
Exhaust_Lift: 10.5mm

Intake__Duration: 248º
Exhaust_Duration: 248º

Intake_Opens: 2º BTDC
Intake_Closes: 66º ABDC

Exhaust_Opens: 68º BBDC
Exhaust_Closes: 0º BTDC

Overlap: 2º

The intake cam has been advanced by 4º and the exhaust cam has been advanced by 2º.

The spark plug lised in the ESM is the Denso FXE22HR11

Same smaller valves as on the 2007 Altima.

Stiffer valve springs than the 'revup' engine. Strongest springs to date on any known production VQ engine. They might be the same as the Nismo springs.

113-127lbs @ 26.2mm (vs. 98-110lbs @26.2mm revup)

Once piece main cap/girdle/skirt with six bolt mains. Similar or same design as the VQ40DE.

Edited below.
Suspicions about longer rods aren't true. The VQ35HR has the SAME 144.2mm rod length as all other VQ35s. Unless the ESM is wrong. But this block is supposed to be taller. The difference might all be in the piston height.
However it does have 57mm journals vs. the old 55mm journals (without bearing).
54mm vs. 52mm Crank journals.
Main crank journals increased to 64mm, up from 60mm.
Main crank bearings thickened to 2.5mm up from 2.0mm.


EDIT: HAL is reporting that he had a HR rod physically checked to be 152.2mm. Which coinsides with the 8mm block height increase that's been reported by various sources.

JClaw

iTrader: (17)

So the rods are the same length? Damn! I thought that was the entire raison-detre of the new motor, and the reason why longer rods would not push into the side of the block as much.

That makes me feel better about reving an old 3.5DE to 7000 daily and occasionally 7200-7300 with just ARP Rod Bolts. I hear they are stronger than the rod bolts on the 7000 rpm 05-06 motor.

Nealoc187

iTrader: (23)

On point with the info as usual... nice.

SR20DEN

iTrader: (7)

It doesn't add up though. The ESM might be wrong. And it won't outright show the VQ35HR block height. They also don't show the piston height from the pin center to the top. So we won't know for awhile. I am still trying to get the 2006.5 350Z ESM which uses the VQ35HR. Maybe it will reveal a little more.

As for the rods, you don't have to have longer ones to rev higher. Having taller pistons can give you the same effect. Normal VQ35 pistons were bordering on the short side for production engines, IMO.

edit: the 2006.5 350Z ESM appears to have been removed from the Nissan site. Odd.

JClaw

iTrader: (17)

I remember a while back you said you revved yours with just ARP rod bolts to 7500 occasionally and 7200 more often. Is your tach accurate unlike with the stock 4th gen rev limiter where the needle actually goes to 6800ish while it should be 6550?

SR20DEN

iTrader: (7)

The A33B tach is worse than that. They indicate 7000 @ 6600 and mine indicates 8000 when @ 7500. So when I go to a dyno where I don't get to run my own car I tell the guy to take it to the tach indicated 8000rpm.

Tatanko

iTrader: (34)

Mine isn't that bad. Mine is nearly spot-on, actually

AnDyMaN

iTrader: (19)

here is some pics of the g35 vq35hr

http://www.nissanperformancemag.com/september06/vq35hr/

just some eye candy.

SR20DEN

iTrader: (7)

lol. The ESM says it has smaller valves.

JClaw

iTrader: (17)

Must make the dyno guy a little nervous, especially if he knows stock rev cut is 6600.

GodFather

iTrader: (10)

The cams have high lifts, similar to JWT's. Thus having smaller valve diameters makes sense. Nevertheless, good thread full of info's...Subscribed.

-Peter-

LA02MAX

iTrader: (3)

A lot of good information in this thread. Thanks for posting all the specs, SR20. Although I'm sure it'll be a while before we see these in junk yards, I'd be interested in seeing the benefits over the maxima's VQ35DE.

JClaw

iTrader: (17)

I think the new 7000 rev limiter is a good step forward for the second gen Altimas. Looking at your tach it seems 7000 is a lot more suitable than 6500-6600, which seems somewhat cut-short.

A33 VQ30DEK

iTrader: (23)

sooo you guys think we can swap the HR into our maximas?

SR20DEN

iTrader: (7)

I just got the 2007 350Z ESM, it confirms the rod lengths as listed in the G35 ESM.

AnDyMaN

iTrader: (19)

from what ive heard over in the 350z forum, HR motor doesn't directly swap in to cars without HR. I think its more of the wiring/ecm differences.

SR20DEN

iTrader: (7)

It won't directly swap because it is physically taller.

hlh0501

iTrader: (1)

In addition to being physically taller, the HR is also wider and the bolt pattern for the transmission is different so the old VQ30 and VQ35DE transmissions will not bolt up.

An incredible motor though as far as over 1000hp potential - Nissan really stepped it up on this one.

nismology

iTrader: (8)

You can thank the GT-R for that. Nissan would have absolutely no reason to overbuild it like they did otherwise.

japmaxSE

iTrader: (7)

Just in time, thanks sr20 for the specs.

Broaner

iTrader: (10)

Awesome info as usual DEN.


Just thought I'd say that I hate reverse bimmer style.

JClaw

iTrader: (17)

Yeah the HR is going to shut all the VQ naysayers up. I cant believe how much crap I get from Honda guys who are bitter because they need to sleeve their blocks to make real power LOL LOL LOL hit them where it hurts

SR20DEN

iTrader: (7)

Jack at www.p1auto.com exceeded 500whp on our mustang dyno with a stock sleeved B18C. It didn't pop untill he approached the 550whp mark.

Just like the VQ guys are learning, it's all about the tuning.

nismology

iTrader: (8)

George at GT Motorsports hit 518 WHP on a completely stock VQ35 with no water/alky injection. Hasn't popped yet.

Red Lion

iTrader: (13)

lol boosted?

I only ask because I recall some Japanese tuners (Top Secret maybe?) saying they wanted to hit over 400WHP all motor.

nismology

iTrader: (8)

Of course. APS TT.
There is a Japanese heavy hitter (won't say who) who will be selling a crate motor for the 350Z/G35 application that is good for 400+ WHP all-motor in the near future. Stock displacement too.

Long live the VQ!!

Red Lion

iTrader: (13)

Aw come on! I'll mail you a cookie!

JClaw

iTrader: (17)

I want that engine in my car. Badly.

steven88

iTrader: (28)

no it won't fit..unless you have alot of money to modify it

JClaw

iTrader: (17)

Because of the new bellhousing this engine will be much easier to swap into a RWD car. The current Frontier VQ40DE 6-speed transmission bolts right up to a VQ35HR I believe.

JClaw

iTrader: (17)

Edit -

steven88

iTrader: (28)

he's asking if we can swap the HR into our maximas...

LA02MAX

iTrader: (3)

I could be wrong, but I think that was his point, in that it would be difficult to swap into the max since it's FWD.

But after you got passed all the mounting issues, what of the ECU compatibility? I mean, the G35 uses CVTC on both the intake and exhaust cams which has a different range than the FWD VQ35 CVTC on the intake anyway, as well as dual TB's and dual KS's. Swapping the entire HR ECU would cause a lot of problems probably, just as the VQ35 ECU does when swapping out VQ30s.

Another question, SR20 you said that if you added a UDP to the new VQ35DE, that it would probably underdrive the steering, but isn't the steering electric now? I'm probably wrong, but I was just under the impression that most new cars are switching to this method...

SuperStasiu

iTrader: (3)

So with this new motor design and all you guys think there might be rwd or awd maxima coming out soon??

Broaner

iTrader: (10)

Don't get your panties in a bunch on this one. The Maxima is relegated to the luxo boat world now as it should be. Way to big of a car to be largely performance oriented.

But unlike all other VQ's. The used price of this one will be sky high. I'm betting $3K+ for at least three years. As is G and Z 35's even the non rev-ups are Low to mid $2K.

Nealoc187

iTrader: (23)

SGP hit 653whp 598wtq on 93 pump with no water/alky/meth or other funny business the other day on a stock displacement motor VQ35DE, unsleeved.

JClaw

iTrader: (17)

Yes? And? Thats my point. If you want to swap the HR in a RWD car you dont have to deal with all that axle, transmission, whole front subframe crap. In a maxima it gets a hell of a lot more complicated.

I know thats why Im keeping my 600$ VQ35 with cams for a while. I will not swap to the VQ35HR, I will wait for the VQ38, and then look into making 380-400 hp NA and daily driven. That will take a while though. The extra displacement will make the extra $$$$ worth it, for factory reliability. For the price of building up my current engine and taking it to 3.8L, I will definately wait for the factory motor, especially if it can rev to 7500 stock. Only then will all the VTC crap be worth it for me lol

nismology

iTrader: (8)

The HR was overbuilt primarily for boost, namely in the GT-R. Built DE > HR if your staying n/a IMO since it'll most likely be cheaper and more straightfoward. I don't see the point to swapping one in unless you plan on making 500+ WHP and don't feel like buiding a motor. Even then, i'd only swap in the short block and use ported DE heads since they bolt on. Just my $.02...

ajcool2

iTrader: (43)

OOOO makes my feet tangle.