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GTR Dyno

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Old Jun 17, 2008 | 10:56 PM
  #1  
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GTR Dyno

http://autopowervids.com/Nissan/watc...-dyno-run.html


Liessssssssss nissan.. all liessssssssssssss
Old Jun 17, 2008 | 10:58 PM
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What were the results? Can't watch the video at the moment.
Old Jun 18, 2008 | 12:59 AM
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430.6 hp
425.3 lb-ft

AT THE WHEELS!
Old Jun 18, 2008 | 01:12 AM
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They said it pulled 430.6 hp and 425.3 ft/lb so using 15% or 25% driveline loss due to AWD the car makes well over 500hp and more than Nissan listed the car should at 480hp.

To me it's not a big deal as who doesn't love underrated power. But it does help explain why the car performs so well for it's portly weight.

As with many things on this car the real story is different than what was advertised. I'd have no problem with the car if Nissan listed the true HP, tested it in production trim and cut any corners at the Ring. If the car is truly worth the hype it should be able to perform on its own merit.
Old Jun 18, 2008 | 07:24 AM
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I highly doubt that its only a 15% drivetrain loss, through AWD.
Old Jun 18, 2008 | 07:52 AM
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I hate to say "I told you so".
Old Jun 18, 2008 | 08:22 AM
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I can't see the video either. What kind of dyno is it?

Based on other things I've read, I am starting to believe that Nissan pulled off an AWD drivetrain with <15% loss.
Old Jun 18, 2008 | 08:27 AM
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Originally Posted by JakeRobb
I can't see the video either. What kind of dyno is it?

Based on other things I've read, I am starting to believe that Nissan pulled off an AWD drivetrain with <15% loss.
Appears to be a Dynojet - I might be wrong, though.
Old Jun 18, 2008 | 08:41 AM
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Originally Posted by JakeRobb
I can't see the video either. What kind of dyno is it?

Based on other things I've read, I am starting to believe that Nissan pulled off an AWD drivetrain with <15% loss.
They said it was a dynojet at K&Ns R&D facility.
Old Jun 18, 2008 | 09:07 AM
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Originally Posted by GRNcamaro
they were speculating in the video some where between 25-50% drive train loss at at 50% it would crank out low 500's at 25% it would be about 575 crank horse power if it was 15% it probably 600
Whoa, way to get your percentages wrong! At 50% drivetrain loss, the engine would be producing 430 x 2 = 860 HP.

They said from 15% to 25%, translating to 504 - 570+ HP at the flywheel.
Old Jun 18, 2008 | 09:10 AM
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Quote from C&D about a red GTR.

Car and Driver was testing a red GTR, looks to be the same one as in the video, unless they have several red production GTRs given for testing. This is the quote:

"That GT-R from the May issue launched at 4500 rpm; 4400 rpm is the final setting for production. This GT-R may have been down on power; the May car ran the quarter-mile in 11.5 seconds at 124 mph. This one couldn’t crack 12 seconds and was a stunning 9 mph slower. (We’ve since tested a third GT-R that was as quick as the first car.)"

So you have it. Over 500 HP at the crank (from the video), and it couldn't break into 11's (from the article). The question is, what is the GTR from Nuremberg making at the flywheel? Well over 600?

Edit: makes you wonder, why didn't they list the true HP? Many automakers have cars in the 500 to 600 HP range, and if bragging rights is everything, why not list it at 510 or 550, or whatever it's at?
Old Jun 18, 2008 | 09:52 AM
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430hp at the wheels is still mightly impressive for a V6.
Old Jun 18, 2008 | 10:06 AM
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Originally Posted by muckz
the GTR from Nuremberg
http://en.wikipedia.org/wiki/Nuremberg
http://en.wikipedia.org/wiki/Nurburgring

Get it right.
Old Jun 18, 2008 | 12:00 PM
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Originally Posted by muckz
....Edit: makes you wonder, why didn't they list the true HP? Many automakers have cars in the 500 to 600 HP range, and if bragging rights is everything, why not list it at 510 or 550, or whatever it's at?
Over the years I've been here, I thinks it's fair to say that I've been inundated with, shall we say, less than friendly posts, from folks here regarding GM's legendary underrating HP in it's vehicles yet that doesn't seem to bother anybody that they do that.

Assuming Nissan has underreported the GT-R's HP/Tq (and I'm not at all agreeing that is has), why should that bother anybody now?

When it comes to performance cars, who cars what is "stated" anyway...the only issue that really matters is how the thing performs day to day and if the people who plunk down the $$$ are satisfied with what they got for their money.

This car is going to be EXTREMELY well and frequently tested and over the course of the next few months, a true picture of its capabilities will emerge (not that such testing will ever get in the way of peoples opinions )
Old Jun 18, 2008 | 12:09 PM
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Originally Posted by Robert_Nashville
Over the years I've been here, I thinks it's fair to say that I've been inundated with, shall we say, less than friendly posts, from folks here regarding GM's legendary underrating HP in it's vehicles yet that doesn't seem to bother anybody that they do that.

The only vehicle that was grossly underrated by GM, in my memory, was the f-body. It had 330 HP to 345, depending on the dyno, and yet it was rated at 305. Several things to keep in mind. There was some sort of thing about not encroaching on Corvette's territory. And it was a mass-volume car.

Enter the Nissan GT-R, which is not in the same category as the f-body. This is Nissan's flagship, the Ferrari of Japanese cars, and this car's mission is to set the bar in every category. It doesn't have anything else to compete with from Nissan, and there is no unspoken rule of limiting the HP to 480. So why not set the record straight and make your car break the 500 HP mark at the flywheel?

I don't have any problems with this car being underrated, I'm just saying that it is very likely underrated (Nissan engineers claim to have designed their system to produce only 10% drivetrain loss... in an AWD vehicle nonetheless). Moreover, it also seems that the car(s) Nissan used to set some records were tuned to produce way more power than the claimed 480HP. The versions that consumers will get in the US will not perform as well as Nissan hyped it out to be.



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