Rampant

So is an extra 400 or so pounds.
Also, I didn't hear if either was AT or not.

I actually think it will be closer than many think. It sure would be interesting though.

drooke

iTrader: (1)

your gunna get beat if the guy can shift if its auto ur gunna get burned from the start all the way to finish but good luck lol i will put money down on him

Regul8or

iTrader: (4)

exactly my mindset. I would prefer him to take out a 6spd, but i'll take what i can get

Hew was a real salesman, he was dressed up, was printing out some paperwork, and i got his card, lol . That would be one hell of an imposter!

jonahlw

iTrader: (2)

it's like 10% more horsepower, with 5-6% more weight...so the g37 has better power to weight, I would say you probably won't win unless you cheat or something...or he leaves traction control on and you dump your clutch.

put one of those mrev and spacers on, you would prob be much closer then..

SniperHunter

iTrader: (9)

Nope. 3250lbs @ 300HP vs. 3770lbs @ 330HP.

G will lose. The power to weight is in favor of the Z: 10.8 vs. 11.4

Rampant

^ Not sure if those numbers are correct (thought the Z was closer to 3300 and the G was closer just under 3700) but it does show how close they actually are in power to weight.
Also, is the gearing any different between the cars?

And, let's not forget the Z has the lighter driveshaft and might get the power down more efficiently, etc.. There is at least one dyno on this board where an 07 Z and an 08G are within 10hp or so (same dyno, but different days).

It sure would be interesting. If the OP and the salesman don't do it for some reason, we should try and get some owners to step up and see what happens.

RBull

As time goes on the G37 grows heavier. Soon it will be over 4000 lbs.

It's actually another 250 lbs.

RBull

Nope. 3339 lbs vs. 3682 lbs Where do you guys get your numbers from?

11.13 vs. 11.15 - nearly identical power to weight ratio

On paper it's a drivers race.

joe603

It sounds like a version of the GTR...?? They really need a vert for the G too.

jonahlw

iTrader: (2)

G37 is roughly 9000 pounds, z is 2000 pounds (with occupants), Z FTMFW!!!

Cyp

iTrader: (3)

after having redlined the G37 a few times and driven the G35..I would guess that the new G is a bit faster in my opinion. THe motor responds quicker and launches faster than my Z and a G35

Hraesvelg

iTrader: (1)

cvt

iTrader: (1)

then it's all come down to gearing...but then again isn't the 300hp rated on the track going by the old sae rating? isn't the g37 going by the new sae rating?

RudeG_v2.0

iTrader: (1)

Yep, good catch. The '07 G35 coupes with the DE motor are sold with the new SAE numbers, which are 293hp for the manual and 275hp for the auto versus 300 and 280 under the old rating system.

Regul8or

iTrader: (4)

wow, this just answers so many questions that I had. My other friend owns an 07 auto (he regrets his tranny decision ) , anyways, whenever we run, I beat him, but not by much, perhaps a car and a half depending on what we go to. Im a decent driver, and I've always wondered why he is so close to me.

So his car is a DE motor, like mine, and its non-rev up unlike mine, is auto, and has 25 less horses. This means that if my car dyno's in the roughly 245-250 range stock, and the 07 Z's are around 270 if Im not mistaken but are only rated at six more horses. This could be due to a more efficient engine. But I will assume that my rational is correct....The 07 G35 auto, which is at 275, must then be around, if my math is correct 270/306 = x/275 ====> x= 242.65!!! wow, that means I only have about 3-8 more horses stock!
This means that the only reason I win is because of the roughly 150 pound difference and the fact that I have a manual.

One more thing, if the manual 07 G's have 293 crank, and under the new SAE regulations, same math using the 07 Z ratio 270/306 = x/293 ====> x= 258.53 which is more than mine

wow, these new ratings really mess everything up and make it confusing. In this case the rating of the G37 is around 291!

So, if My Z has 250 ( if Im lucky ) and is 3370 pounds. The power-weight ratio is 13.48

The G37 has 290 ( not sure if true ) and is around 3700 pounds. The power-weight ratio is 12.75

which means I will get killed

Somebody please tell me if any of that made sense, or if I am on the right track. Also can some of those numbers be confirmed about the 07 models from respective owners, thank you!

RudeG_v2.0

iTrader: (1)

Nope, I think you're a little confused.

The power on the DE motors didn't change. Just the way the horspower is rated/measured. Your '06 rev-up 6MT Z was sold/advertized under the old rating, which was 300hp. The '07 6MT G35 coupe has the exact same engine and power as your '06 Z. Infiniti just advertized/sold them under the new SAE ratings which is 293hp. I saw this on both Infiniti's website (before the G37 was on there) and I just received a mailer from Infiniti trying to sell their remaining '07's and they stated the same new SAE numbers of 293 and 275.

So 293 - 275 = 18 less horsepower for the auto on the DE motor. It also means that the 306hp '07 Z has 13hp more than a stock '06 rev-up Z and that the G37 has 37hp more.

Regul8or

iTrader: (4)

Ahhh, ok I understand. Thanks alot. so it means that, assuming that driveline losses are constant ratios, the G37 does have 37 more than my car, but as you said the 07 Z only has 13. I could of sworn that people are getting theirs dyno'ed at around 270. I know it depends on the dyno, conditions etc. Im pretty sure that my car then does not have around 257 stock. So do the new cars have better efficiency?? which means less losses.

SteveZ

iTrader: (3)

Nope, me neither. Call my G35 Coupe "unrefined" by comparison as most of the rags do, I'll keep it. I don't like the G37's weight, the back seats are now a joke, you may as well have a Z in terms of space - the 2" or so they took out in legroom is more than it sounds in useful space. The styling falls far short of the Concept; the styling IMHO falls short of the original G Coupe in most aspects.

The weight is horrendous - 3700+ lbs, they've traded performance for more luxury. Up to ~5000+ rpm the differences in hp are just not what you'd expect - marginal improvement in power down low over even a VQ35DE, . It gets better around 5500 rpm but not the difference I expected. Also notice peak speed in gears is about the same, it just happens at a higher rpm - 7000+.

Would it beat a rev-up '06 manual? IMHO, no. It would likely beat my '04 G35 Coupe 6MT despite a 300+ lb weight penalty, mostly because the G37 motor can pull strong above 5500-6500 rpm, by 6500 I'm right at cutoff. Still, we're talking 10ths of seconds in a 1/4 mile. About all I like about the new car is the motor. Given the lbs/hp it has to haul around in the G37, I don't see it walking on an '06 rev-up MT.

Nissan has traded performance for a broader appeal, I bet they sell mostly the G37S with AT's and paddles, because you don't really have to know how to drive to own one. I went from my 350Z to my G feeling like I didn't give up all that much, at least nothing I couldn't address (e.g. lower spring rates in the rear). They abandoned the enthusiasts with this one, big surprise... There won't be too many arguments on this one whether the Coupe is a "Sports Car" like last time around

SteveZ

iTrader: (3)

Well, the main problem here is too much focus on peak hp only. The extra weight you have to carry all the time, the peak hp difference you only get at the top of the tach. Everywhere else the difference isn't that much.

My SAE corrected hp to the wheels measured out to best of peak 238 whp on my '04 G Coupe (Stock), on a Dynojet with the wheels off (not a roller dyno), which usually reads more true and thus lower. That's on a corrected 280 crank hp. At that time most of the '03-'04 350's stock trim were testing at the same facility not more than 240 or so whp.

The G35 Coupe has added some weight since 2004, it was 3,435 lbs back then in the 6MT trim, plus I've dropped some weight off the car, call it 3400 in round numbers. The 2007 G35 Coupe is 3,524 lbs rated curb weight. But assume the efficiency loss is about the same (loss of 42 hp on mine of 280 corrected SAE rated), about 15%. So in round numbers not 270 whp, more like low 250's. I think Automobile used numbers from an older G35 in the chart below, 236 is way off the pace for the newest G35 Coupe.

So I have to haul around Peak 14.3 lbs per hp, the newer G35 Coupe about 14 even. Pretty close. What's really sad is my only slightly hopped up 1991 B13 SE-R is 14.1 lbs/hp (under 2400 lbs, 166 whp, NA, tested). All that includes really is I/H/E, JWT ECU and C2 cams.

What's not all there with your math is those are Peak hp numbers - you don't drive 6600 or 7300 rpm much where that peak lays, you drive hard usually 4000-6000 range.

Check out the charts, they are very close until you get up to 5500 rpm - remember that 12-something number does not happen until 7300 rpm. At 5000 rpm the difference is less than 25 hp to the wheels or about 10% more. Weight is between 5-10% more, so especially if any good amount of that is in the big wheels or other rotating weight like those big brakes, hp just doesn't tell the story.

People look way too much at peak hp numbers. The 335i for example "only" peaks at 300 whp, but it has a good 20% advantage (instead of 10 hp) throughout most of the rpm range compared to a G37. And, the G37 doesn't get 290 whp until it's above 7200 rpm. At 5000 rpm, it's under 225 whp.

Just look at the curves - it doesn't really start to spread a lot until way up top, and that's a VQ35DE, not an HR:

RudeG_v2.0

iTrader: (1)

Keep in mind that the horsepower numbers I was quoting are at the crank, not at the wheels. From what I've seen here on the boards, stock Z's and G's with the DE motor dyno in the 230's to 240's. GTM dynoed their new G37 project car in the 270's.