SteveZ

iTrader: (3)

+1 ^^^ High 230's to low 240-ish for VQ35DE G35 Coupe 6MT, dyno'd in 5th gear.

Besides ignoring the difference is in peak hp, and all these numbers of lbs/hp are really just lbs/peak hp, exactly how fast do you think you have to go before one has a really significant advantage - more than just driver to driver variation? 90? 100? That 290 is in 5th gear (1:1, lowest drivetrain losses) at 7300 rpm, or > 150 mph if that car wasn't on a dyno and ignoring wind for the moment.

A car with +50 crank hp over my Coupe should just rock. It doesn't - at least not how it should. On paper peak numbers should be close to the BMW 335i, but on a dyno the BMW maintains a much higher whp consistently through the entire range over a G37. For 3700cc and full VVT, I expected better.

The G35S Sedan 6-speed with the VQ35HR impressed me more - faster than my Coupe, better turning radius, tighter steering rack, and decently firm suspension.

EJ2000

I have driven a rev-up 350z auto (06), rev-up 350z manual (06), VQ35HR 350z manual (07), 2007 G35 sedan auto, 2008 G37 auto, and 2008 G37 manual...

Also, I previously owned a rev-up G35 coupe 6MT, and now own a G37 6MT.

The easiest comparison for me is the cars I know in and out - the G37 is definitely faster than a rev-up Z/G. After owning both, I know both cars well, and my butt dyno tells me the G37 is faster. There is also a short stretch (about 1/8th) on the way to work where I stretch the legs of my car a little. In the G35, I trapped at about 71-72 when passing the marker, and in the G37 it's about 74-75. It's a noticeable difference. The OP will likely lose the race against the G37 - not by a lot, but the G37 will pull on you.

Now, where the comparison gets difficult is 2007 350z to G37. I drove the 350z a few months ago and now own the G37 so I have no back to back gauge. If I had to guess, I would say the G37 is just very slightly behind the Z. The autos in the HR motors (35 and 37) do feel a bit slower - it's hard to tell if that's just because 3rd and 4th are taller, or less shift shock.

If I had to rate, I'd say:

2007 350z 6MT = G37 6MT
>
2007 350z auto = G37 auto = 2007+ g35 sedan auto
>
VQ35 rev-up
>
VQ35 non-revup

I'd have to agree with skaterbasist that you can't really go by hp and dyno numbers with how many variables they are. Not that my butt dyno and mini drag strip are scientific methods, but my opinions seem to fall in line fairly well with the mags.

diwun67

iTrader: (13)

There's no such thing as a rev-up Z with a 5AT

EJ2000

If you're going to blame the G37 performance, I wouldn't be knocking on the engine. As has been discussed, this engine is easily the best VQ yet. The 50+ crank hp over your coupe does rock, but the weight of the G37 does not.

I'm surprised you'd say the G35S sedan impressed you more. The steering rack is nearly the same in the G37 if not slightly improved. The suspension of the G35S sedan is the standard suspension on the G37 non-sport. The G37S has an even stiffer suspension. Performance wise, the G37 does everything the new G35 sedan does equally well if not better.

EJ2000

my bad. 2006 350z auto. Was there no change in horsepower between 2004 and 2005 automatic models? (i.e. always at 280?)

zman1910

iTrader: (3)

Actually on the older hp rating of 293hp the Z would now be at 11.4 vs the G's 11.16......

combine that with the much much more efficient power delivery of the new engine and I personally think you will get walked even if it is an automatic and if it is a manual it should be even worse...

In other words don't race him bc even though he doesn't know what hes talking about.....it'll be even worse when he wins...

And if it means anything the rev-up engines are slower to 60mph than the non-revups. I've owned both and the rev-ups shine up top where the DE's fall on their face. The new VQ's shine both at the bottom and at the top now by comparison..

cvt

iTrader: (1)

just test drove the G37...it's faster than my 03 Z touring with i/e/h/spacer/pulley/reflash. it's great how the car keeps pulling...

Regul8or

iTrader: (4)

Really good post
Alright guys thanks for all the feedback, keep it coming. Well tomorrow are gonna do it. Even if the race falls through, I still wanna test drive the G37 and clear my head lol. Also, ill try to post a video

diwun67

iTrader: (13)

All 5AT Z's from '03 to '06 have the non rev-up 287hp DE motor.

Counter_Culture

quick solution to the power to weight ratio problem:
be on a diet and lose weight. haha. you can probably also strip the smallest things to make the smallest difference. but good luck.

and about the "2 door sports car" that the salesman was talking about....wouldnt that be the new GT-R?

Regul8or

iTrader: (4)

Ok guys, here is the scoop.

We went back on Yesterday and sure enough he was there. I said hi to him and he knew exactly what was going on. He got some keys and we drove around the dealer to the back to check out the Coupe. The race was out of question for two reasons, 1 the horrible traffic, and 2 there was no tag on the car and he did not want to get in trouble, i agree, its not worth it.

Nonetheless, we got in and he gave my friend and I a ride. I wanted to at least drive the damn car but since he had none of my info, he said no. He took us around some back roads and gave us a hell of a test drive.

I still wanted to drive though! So i kept egging him on, I was like "its quick, but i dont know if its faster than my Z" haha. He was cool though and he finally pulled over and we switched.

Ok on first impression, the clutch is sooooo soft. Much softer than mine, the first start was a little shaky, but i got used to it. Also, the gas was much harder than mine, it has the BMW gas peddle where it is attached to the bottom of the floor. I loved the tranny, there was no noise that we have in first or shifting, etc. the shifter honestly i think had shorter throws than mine, but that could be due to a smaller ****.

Anyways, i floored it and redlined both 1st and 2nd a few times, and took it around some twisties at average speed. It does pull up high, but down low, i was not impressed, it does not have that powerful torque curve that I would love. keep in mind that this is with 3 of us in the car, So it weighed about 4200 pounds!!

From a dig, i think i would get in front because of the weight, and the fact that he only has 10 more peak torque. I know that my first gear is by far the worst, but i didnt think that the G37 was better. In conclusion, I dont know if it would beat me in a fair race, it might, but it seems too close, so IMO it would be a drivers race.
I was really impressed with the tranny though, Im not sure what changes were made, but they did something right! Anybody know anything about that tranny??

cvt

iTrader: (1)

next time..ditch your friend...3 people is too much to ask for an already heavy coupe.

Regul8or

iTrader: (4)

haha, you're right, but he wanted to see it too, he owns a G35 lol.

RBull

'07 Z 306 hp
'08 G 330 hp

both new SAE

Correct, gearing will come into play.

RBull

Thanks, I was comparing the '07 Z to '08 G37 in my numbers which is what I believed the conversation was about. My mistake as I now realize the OP had an '06. My post was in response to Arnold K who posted erroneous weights for both the Z and the G37 thereby skewing his power/weight ratios.

No need of giving me advice on racing since I'm not the one doing it.

Rampant

Just for the record (not that it really matters), I never gave specific numbers -- all I said was 400# or so. And, according to your numbers, it was a 343# difference -- so I was at least close. So, if you are going to call someone out for giving incorrect info, you might want to make sure you have the right person.

Also, as far as weights are concerned, many different sources can give different weights depending on trim, options, fuel, etc., so it is quite common to get slightly different numbers -- all of which are legitimate.

The important thing in this discussion is people were expecting the extra 0.2L and 30hp or so in the G37 to give a significant performance advantage. However, in the real world in might not be realized--primarily because of the increase in weight. We can bench race all we want, but until we can get the cars on the same street at the same time, we will never know for sure.

fast kiwi

iTrader: (1)

you'd lose....

SteveZ

iTrader: (3)

Man I really wish people would stop mouthing "+50 hp" like a marketing puppet. That's +50 PEAK crank hp. The whp shown on the dynos I've seen to date show that at lower rpms the gap narrows to 20 or less, almost within the range of even an older VQ G Coupe with a Z tube and an Intake. Whp can be as low as only ~+10-15 at most below 5000-5200 rpm. If I don't "blame" the engine for that, what exactly should I "blame" - the key fob or push-button starter?

No question "best VQ yet", no argument. Up top, superior power and have to love that rev ceiling - that's great. I just expected more across the entire range vs. mostly up top, given 200cc more displacement fully variable timing, dual intakes, etc. The additional power to the wheels over my basic old G35 '04 6MT just isn't going to show up dramatically below 5k rpms, regardless of the weight issue. Think about a G owner looking to "trade up" - wtf are you really getting for at least a $15k if not $20k outlay buying "up" to the G37? It should be freakin' awesome, no questions asked!
Why? I didn't say I "drove a G37 and it sucked compared to the 2007 G Sedan". I said the sedan impressed me relative to my G35 '05 6MT. Get it straight - I said The new G Sedan is very good compared to my 2004 G Coupe, that's all.

Coupes should do everything better than the sedan, except hold 4 people and luggage. The BMW 330i Sedan vs. 335i Coupe is a good example. Coupe should be lighter, not heavier, significantly faster, and more sporty overall than the new sedan, period. From what I can see (second-hand for now), it fails on all counts.

cvt

iTrader: (1)

i think some of the problem is due to emissions. yes, the VQ37 flows well but not as it should (as posted before). a more aggressive cam would spike the peak hp but sacrifice low end..maybe even mid. since they ones that have been dyno'd seem to run very rich there maybe more power in tuning the a/f...maybe catch an extra 10whp across the band if it was leaned out a bit.

anyway, for what it is (which is a luxury "sporty" car) it is a great try...even prompting at least 1 mag to claim that it was better than the 335i (which is horse poop). it's apparent infiniti's target is leaning toward more luxury than performance. i think the performance aspect will be left to the Z and GT-R.

SteveZ

iTrader: (3)

^+1 Well put, that seems to be the plan.