2009 Nissan GT-R on a Chassis Dyno
 

First Test of the 2009 Nissan GT-R on a Chassis Dyno
2009 Nissan GT-R: Dyno Testing Godzilla

http://www.edmunds.com/insideline/do/Features/articleId=125172?tid=edmunds.il.home.photopanel..1 .*

3rd gear....

A ps (Pferdestaerke) is 0.986 horsepower.

A Nissan spokesperson at the Geneva Autoshow confirm me that the 480ps are "at the wheels". At the crank the engine produces "at least 520ps".
520ps is about ~513hp

Have a look in the pinned thread "GT-R Lineupand Specifications" in the fine print down the bottom of the brochure it says this about the quoted power figure from Nissan Japan (480PS Horsepower):

"The engine power output values indicated in this catalog are all net power output values.
Engine power output can be indicated as 'Net power output' or 'Gross power output'. 'Gross' values are estimations of power output of the engine alone. 'Net' values are estimations of when the engine is assembled onto the vehicle. For estimations of the same gasoline engines, 'Net' values are approximately 15% lower than 'Gross' values according to JAMA research. "

Manufacturers use net hp to mean with all ancillaries attached i.e. intake, exhaust, alternator and accessories that would be attached when the engine is in the car. This is how SAE rates the engine. It is still measured at the crank. In the past engines were tested without these things attached and that was gross hp. It appears that Nissan understated the actual engine output but I wanted to clear up the difference between net hp and wheel hp as it is used by manufacturers.


-Stock GT-R Dynos at 460 awhp
http://2009gtr.blogspot.com/2008/03/jspec-connect-r35-gt-r-on-dyno.html
http://www.socalevo.net/index.php?option=com_smf&Itemid=37&topic=57282.0
http://2009gtr.blogspot.com/2008/03/r35-gt-r-on-dyno-results-rre.html
NOTES: i dont know what gear this was done in, but it still has the limiter. I know this is the GT-R imported from japan and its probably using 93 octain.


-482 ps (475 hp) and 59.2 kg/m (428 ft-lbs) at the hubs.
http://minkara.carview.co.jp/userid/149571/blog/c227132/
NOTES: Results will be printed in the 12/25 issue of Bestcar. Also said that the limiter came on in 4th gear so there should be more potential.


-480 PS (473bhp) (353 kW) at 6400rpm
We decided to try out BP Ultimate 102 unleaded, (which is still pump fuel).... 520 bhp @ 6,617
wheel bhp using ultimate 102 unleaded - 457.7bhp @ 6,507rpm


-419 HP 416 ft-lbs
http://blogs.cobbtuning.com/?p=212
NOTES: a) We use a Mustang AWD dyno b) Runs were made in 3rd gear due to the speed limiter coming on in 4th. c) We’re at ~4000 ft altitude here in SLC d) A 50/50 mix of 91 octane and 100 octane was used


A dyno is a tool. Thats it. Take all the numbers off any dyno with a grain of salt. To me +/- 20% or 30% is not off depending on the dyno, whos using it, the correction, etc. They are just numbers.

Dyno numbers- are JUST NUMBERS. SO DO NOT RACE DYNOS.

Remember these cars and these numbers were all done in 3rd gear because of the speed limiter.

The R35 GT-R makes about 520ps-550ps engine horsepower. Thats the number it takes a 3825.6 lb car to be faster than a lighter 997 Turbo.

things are getting pretty serious


interesting info, thanks man

A note for non connected dynos like the one pictured. With this transmission type, and some modern cars in general, the power and transmission can dial back when it sense differentials in front vs rear wheel speeds. We noted this on the new Evo X MR when we did a dyno test showing significantly less than the standard transmission car. The manufacturer tells us it has to be dynoed on a connected roller dyno.

Also, you can get massive differences on the same car using different dynos or different correction factors. A mustang will show far less than a dynojet for example

yeah, i wish that they were more standardized

i feel like they should be, but that there are so many variables

then add in the day to day differences and car gearing

Even though a dyno result will vary on conditions, and the stories will conflict from run to run, machine to machine, it's clear that the HP rating being used by Nissan for the R35 is not the net HP but is actually closer if not exactly for the power at the wheels, a rating almost never used in HP nomenclature.

The R35 is making more like 520HP net, quite beyond what the usual ratings have lead most to believe.


I'm wondering with the promise of weight reduction for the V Spec how much of this power will be liberated and further usable and not lost to friction and weight.

did they just underestimate it so it would be closer to the 997 911 turbo output for magazine comparison..

sure it weighs a lot more.. so they cheated? (in effect)

I think they did it for the enhanced wow factor. Everywhere you heard "wow, how does that fat car do that? it defies the laws of physics..." like that.

100% agree. Dyno's are best used to compare changes you've made on a car. Using the same dyno as a baseline and test runs to measure the difference. I personally have had my car put down 301.9 awhp and the same day with the same tank of gas put down 378.3 awhp on a different dyno. Of course the first one was a Mustang and the other was a Dynojet, so it was like apples to oranges anyway. But it just proves you can't rely too much on what numbers someone posts.

Each car is gonna come up different number so let cross our finger for the better

xx
 

Hate to burst your buble gentlemen But..... The real PRODUCTION version really only puts down 428 to the wheels! The only production car that was actually tested against a corvette or Porsche puts down very low 1/4 mile MPH - a direct indication of HP! Both the Porsche and especially the CORVETTE started pulling away from the GTR after 70MPH the VETTE realy HARD and actually beat the GTR in the 1/4 mile!

If the GTR races a ZO6, VIPER etc from a roll its TOAST!!!!!!

A more shocking Fact...... A regular Vette would probably beat a GTR from a roll!

Just trying to keeep it real don't hate the messenger!

Wow that look like a bad news :squint:

when someone races the Viper/vette, they do it at the track. you will notice that the R35 is made for track performance.

it can also use launch control in a drag, which will kick rear!

if the R35 doesnt use launch control, sure its not as great, but it can still spank at the track without it. the Viper ACR is far better, but how much does that cost? the vette is no competition on the track.

im not going to sit here and listen to a boy racer sitting at a trafic light or on the highway doing stupid **** thats not legal.

make it real, take it to the track.

Track or not , but the real world is out there.

yeah, unfortunately there not going to be that uniform.
________
GNOSTICISM DICUSSION

some questionable claims and backwards logic ITT

Wrong! The real power is above 500hp and the regular Vette won't beat it from a roll. Stop spreading rumors.

Nissan never made the GTR with the intentions of a 1/4mile race. Purely for road track racing.