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Nissan’s white lie - GT-R Dyno Tested at 507 HP at least!

bankhead submitted on 03/28/2008 Official Bell & Ross Timestamp: 6:24 PM
from: www.motortrend.com

[30] user comments | category: New Cars

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Tags: 2009 Nissan GT-R, dyno tested

Tag Links: 2009 Nissan GT-R, dyno tested

Nissan’s white lie - GT-R Dyno Tested at 507 HP at least!

The hysteria surrounding the impending launch of Nissan's GT-R has prompted a mad rush to judge its performance. Various media outlets have attempted to test well-worn engineering mule cars and Japanese-spec vehicles with 112-mph speed limiters. Some have run acceleration tests on sloped track surfaces. Many an unsuspecting GT-R has powered the tire rollers and hub mounts of various dynamometers, registering widely varying power ratings. Most of the numbers generated and quoted have been heroic, which has served to heighten Godzilla's reputation as a mythological beast possessing supernatural powers. But some of these early tests have raised as many questions as they've answered. Over the next few days, we intend to answer them with rigorous testing of a fresh, production-ready U.S.-spec GT-R on flat, level ground.

The GT-R's official output ratings of 480 horsepower and 430 pound-feet of torque give it a weight-to-power ratio of about 8.1 pounds per horsepower -- that's 25 percent more weight per pony than its King Kong nemesis, the benchmark Porsche 911 Turbo and the Corvette Z06, its closest price competitor carry. Yet somehow early pairings of this anime animal consistently show it running neck and neck with those superstars through the quarter mile. Even if we credit its roughly 10-percent gearing advantage relative to the 911 Turbo for some of that disparity, that still suggests -- on paper at least -- that the car should need about 550-570 horses to keep up. Might Nissan be underreporting horsepower by 15 percent? Let's find out.

There are two basic types of dynos: load type and inertia type. The former generates electric or hydraulic resistance calculated to match a vehicle's on-road aerodynamics and friction. This type (Mustang and Dynapack are name brands) is best for simulating quarter-mile runs but suffers garbage-in-garbage-out inaccuracy if the aero and road-load assumptions are inaccurate (and such nitty-gritty engineering details are not yet widely available for the GT-R). Dynapack dynos bolt right to the wheel hubs, which can flummox high-tech cars like the GT-R, which expect to see four tire-pressure monitors whizzing by when the car is in motion. Inertia type dynos like the Dynojet use large, heavy rollers that employ a 4800-pound roller capable of measuring 1200 horsepower at each axle and measure the rate at which the drivetrain can accelerate them. This type is better for determining horsepower of high-output vehicles, as the power is measured directly (torque is mathematically calculated using engine rpm data recorded from a spark signal wire). For these reasons we chose a Dynojet, borrowing some time from the kind research and development team at filter experts K&N Engineering in Riverside, California. Read Article

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Hyundai - 3/28/2008 7:02:41 PM

+8 Boost

Crankshaft horsepower assuming

...15% loss 20% loss 25% loss
HP 506.6.........538.3..........574.1
T 500.4.........531.6..........567.1

From MotorTrend.Com

So basically, since 15% is really not possible I think, the GT-R has between 540 hp and 575 hp??? The T is even more impressive! The GT-R is simply a BEAST!

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Need4Speed - 3/28/2008 7:17:38 PM

+1 Boost

There isn't a production car in existence with drivetrain losses of 10.3%. Never mind the performance credentials of this car, if only for the drivetrain losses of 10% Nissan deserves all the respect...but like the guy at K&N said..."No Way".

reply to this comment

Need4Speed - 3/28/2008 7:31:43 PM

+2 Boost

Also, I've said from Day 1 that Nissan was "underreporting" their bhp figures on this car!

GTR35 - 3/28/2008 7:55:52 PM

+3 Boost

Hey everyone's doing it. Do you really think that the 3.0TT from BMW only puts out 300 Hp? It's actually been dynoed at over 330 Hp.

aston_martin - 3/28/2008 8:48:51 PM

+6 Boost

I thought everybody knew this car was pumping out at least 500 hp, every dyno test done so far has pointed this out

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Agent63 - 3/28/2008 10:37:39 PMView My AgentSpace

+2 Boost

So basically according to the numbers they got from the dyno test The GT-R is estimated to be 27 horsepower more than the Porsche 911 Turbo. Based on test drives i have seen the time gap would easily be filled up if Nissan actually reported the numbers correctly.

I'm not being biased here because the same went on for the 335i. I've seen some dyno's that detected more pony's than the numbers specified.

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lyonboy - 3/28/2008 11:15:34 PM

+5 Boost

Impressive numbers. I just hope a year from now the GT-R's are holding together. That is alot of horsepower and amazing engineering that makes the GT-R what it is. If it all works the GT-R should be a great halo car for Nissan/Infiniti.

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Designer1 - 3/29/2008 2:24:35 AM

+3 Boost

In simple words, kick ass car!!!

reply to this comment

abcd - 3/29/2008 3:14:05 AM

0 Boost

when porsche 911 and gtr were test in that same time on that same dyno they obtained very similar results:
http://www.autoblog.com/2008/03/13/nissan-gt-r-meets-the-dyno-997-porsche-turbo-and-e92-bmw-m3/

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gooch - 3/29/2008 8:02:50 AM

+5 Boost

Despite all-wheel drive, any car that can run the stats the GT-R can -- and weigh as much as it does -- is obviously making a tremendous amount of power. 480 always sounded suspicious to me.

reply to this comment

adamsaf723 - 3/29/2008 9:03:10 AM

-1 Boost

In six months, once the car actually comes out, nobody is going to care. Just like the IS-F.

We all know this car is awesome, you don't have to post 3 dyno articles a day. We GET it.

reply to this comment

lexusrox123 - 3/29/2008 9:43:36 AM

+4 Boost

sounds like someone needs a hug. bad day at work?

njshift - 4/1/2008 10:13:47 AM

+1 Boost

That's because this site is composed of GTR nut-huggers.

MichaelTaylor - 3/29/2008 2:20:13 PM

-7 Boost

Not bad, but I estimate the Lexus LF-A will have 800-1000 hp on the dyno.

reply to this comment

gooch - 3/29/2008 2:56:14 PM

+4 Boost

If this wasn't so ridiculous it would be hilarious.

MattB - 3/29/2008 3:35:56 PM

+2 Boost

And you base this estimate on what?

Htay7500 - 3/29/2008 8:50:46 PM

+2 Boost

I estimate that in your next 10 billion comments, you will still be dumb, ignorant and on drugs.

MichaelTaylor - 3/30/2008 7:54:25 AM

-2 Boost

Lexus engines are underrated. The IS-F for example has been shown to produce 671 horsepower on the dyno. Here's the link: http://www.carview.co.jp/news/0/68289/

The current LS460 actually has 550 horsepower and the LS600h has a combined output of 612.

Htay7500 - 3/30/2008 10:08:20 AM

+2 Boost

your site shows nothing about Lexus and is only talking about the buyout of jaguar from ford. stop being such a liar.

Htay7500 - 3/30/2008 4:05:47 PM

+1 Boost

it seems that you aren't replying. I guess your scared?

FULEXUS - 3/30/2008 9:39:05 PM

0 Boost

LOL!! I was thinking closer to 5,000 HP.

S4cabriofoxone - 3/31/2008 10:09:12 AMView My AgentSpace

0 Boost

That's nothing, the R8 V16 TDI will have 4,769hp and 82,00lb ft of torque, thanks to seventeen turbos. It will also have ten-speed DSG with five clutches (each clutch has two gears for 0.00000004 sec shifts) and it will get 212MPG. All for $1,856,671,000.

Oh yeah, it will go from 0-60 in 0.1 seconds.

Shredmo - 3/31/2008 10:53:26 AM

-1 Boost

Yes S4, but you really shouldn't compare diesels to gasoline motors.

HomberSimslin - 3/29/2008 4:51:54 PM

-3 Boost

This car will have similar effect that a 1988 Nissan 300ZX has done back in days. Wake up the market with shock and awe. Diff. is that, unlike European cars..the wheels won't falloff when you hit a little potholes on the road.

reply to this comment

1BadMan - 3/29/2008 9:58:59 PM

0 Boost

BMW does this with M54 engined 335i & the 135i. So Nissan can do it with the GT-R also.I guess it is better to understate bhp than overstate. But there is a really big disparity there with the stated bhp!

reply to this comment

KZ258 - 3/30/2008 2:22:14 PM

0 Boost

this is my car

reply to this comment

TimmyG - 4/3/2008 5:33:59 PM

+1 Boost

It's not going to happen for a while, but someone needs to take the motor out and measure the power at the flywheel. That would answer all the Qs!

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