The lister who had his car dynoed was Gould2000. It was on a 248C Dynojet Chassis Dyno. These are generally very accurate dynos.

Jim
'03 Sedan
Brilliant Silver/Graphite
6MT/ Premium package
Sport tuned suspension
Aerodynamic Body Kit
Navigation and Satellite Radio

 

shodog: I also see on page 11 under tech section that someone(mossy@nissan) dynoed 246 whp.although this guy has to have some mods which he didn't list cause that's only a 6% drivetrain loss.

 

I don't think you can really trust the raw number. I have the 6MT sedan and had the car dynoed with an Injen CAI, Crawford Plenum, and the premuffler removed. The dyno number (albeit in 4th gear) was 217 rwhp. I think my number is lower than actual and I think the 246 number is higher than actual.

BTW, my 2nd dyno one week later on the same machine read 328 rwhp

--Steve

 

numbers seem to change day to day, with different atmospheric conditions etc. That's why i want back to back dynos. Apples to apples. I've seen 6MT sedan dynos at around 215 too. Infact, some 350Z drivers are getting about 220!

I'm going to try posting in the Midwest forum again...

 

I believe the FX35 with the same 3.5 motor is also rated at 280 HP! That would leave only the G35 sedan with the 260 rating. Again, could be the exhaust system but I don't it worth 20HP.

I agree this could be all marketing hype.

I own a 70 Buick GS Stage 1 with 455 cubic inch motor. The "Stage 1 " was the high performance version with ALL KINDS of upgrades. But here the kicker, both the standard 455 and the higher performance Stage 1 were "factory rated" at 510 Lbs torque. And dispite all upgades, carb, cam, heads, distributor, exhaust and so on, the "rated" HP was only 10 more!! Back then HP was under estimated for insurance purposes or over stated for braging purpose. A few years back, Ford got into trouble for overstating the HP on it's Cobra model. The point being..don't believe the 260 vs 280 difference between the 2 G models. It's all about marketing.

2003.5 G35 6MT Black/Graphite Prem/Aero/Winter
1987 GN Intercooled SFI Turbo (22K original miles)
1970 GS 455 Stage 1 4-Speed (#'s matching)

 

Nissan Japan website is showing G35 sedan 6MT having 272 HP.

http://www2.nissan.co.jp/SKYLINE/V35...EUP/index.html

Click on the photo button, look right under the picture.

 

wow good find!

the 3.0 skyline sedan is rated at 260 hp so the american G35 3.5 should be the 272 hp.

makes sense, i think the coupe's exhaust and intake bump its horsepower rating about 10 hp, not 20 hp.

taking into consideration the sedans lighter weight, really a race between 6MT's should be VERY CLOSE!

 

I did a quick conversion ('cause I'm a nerd) and here's how the Japanese site rates the skylines:

350GT Coupe VQ35DE:
206 kW = 276.25 hp
363 N.m = 267.66 ft-lbs

350GT Sedan VQ35DE:
200 kW = 268.20 hp
353 N.m = 260.29 ft-lbs

300GT Sedan VQ30DD:
191 kW = 256.13 hp
324 N.m = 239.9 ft-lbs

250GT Sedan VQ25DD:
158 kW = 211.9 hp
270 N.m = 199 ft-lbs

It looks to me like the 350 coupe and sedan are nominally different - the extra weight on the COUPE (about 50 lbs, no?) will only make the difference smaller. I guess the real question is whether the drivetrains are different enough to make a difference at the wheels.

I feel better about sacrificing those "20" hp by getting a 6MT sedan now.

Also - anyone know what the second D is for in the VQ30DD and VQ25DD? Is it the JDM turbo designation?

 

Hi everyone,

This is my first post here iv'e had my G35 about 6 weeks and loving it. In response to this subject, i think that the HP difference between the 350GT and our cars is probaly the emmissions control systems. I am originally from South Africa
and we do not have the same laws so the car are faster.

W.L
"Look at life through the windshield, not through the rear-view mirror."


156532-The Infiniti G35 016.jpg

 

If you look 350 gt coupe have 280hp in Japan as here in US. So emmision is probably not the issue here

 

You guys are playing too fast and loose with your horsepower numbers. Raw data, STD corrections, SAE corrections, DIN corrections have to be specified when reporting numbers. Even then, dynos have significant variations. And.... even though SAE, etc, normalizes results to given environmental conditions, test conditions are a still *big* deal.

So bottom line...if you really want to do a good comparison between the Coupe and Sedan....you need to get several of each and test them all on the same dyno on the same day...keeping all variables (like fan placement, tire pressures, strap-down loads, coolant temperature) as close as possible for each car. Otherwise, you really are kidding yourself if you think you can accurately resolve 10 horsepower differences....

'04 6MT Sedan | '95 E36 M3 | '91 Miata

 

its actually a 20 hp difference. But i understand your point. I doubt my ability to get together multiple coupes and sedans, so I'm shooting low. It will give some idea however, and will be better than seeing dynos of cars done at different times in different states! As for the Japanese numbers, Japan has VERY different emissions laws from the US, so thier means of getting to any HP number will be different.

Also, the coupe is rated as getting less MPG than the Sedan, car makers are on sort of a points system when it comes to emissions and MPG, so rating the HP and subsequently MPG figures differently on the sedan which will sell more units will allow them cetain perks in other departments (selling gas guzzlers.) I don't doubt that the Coupe makes more power (than the 6MT sedan), I just don't think it's much more. But I'm only about 50% sure...