From the beginning, the Nissan GT-R's performance figures seemed too good to be true. Weighing in at over 3,800 pounds and packing a claimed 480 hp, the 3.5-second sprint to 60 and 11.8-second quarter-mile time just didn't add up. And then the tests began...

Buff books and online outlets began publishing 0-60 runs between 3.2 and 3.4 seconds, and quarter-mile times began dropping quicker than a co-ed's IQ on a nitrous binge. CARandDRIVER.com discovered a similar discrepancy between five different GT-Rs and finally decided to get some time on the dyno to get some real-world numbers.
CARandDRIVER's first tester ran to 60 in 3.3 seconds and past the traps in 11.5 seconds at 124 mph, causing C&D's scribes to suspect that Nissan engineers cranked up the boost on the evaluation vehicle. Shortly thereafter, two more GT-Rs arrived at their offices, both recording significantly slower quarter mile times and confirming their suspicions. Unfortunately, time constraints prevented either vehicle from getting up on the rollers. That would have to wait until Tony Swan returned with his GT-R after campaigning in the One Lap of America.

Surprisingly, Swan's GT-R performed exactly the same in performance tests as the first GT-R C&D tested. When they finally strapped it to MotorCity Speed's Mustang dyno, No. 4 put down 415 horsepower to the wheels, and with an estimated drivetrain loss of 20 percent (an average on most all-wheel-drive cars), that meant output was closer to 519 hp, rather than Nissan's claimed 480 hp.

Not content to leave well-enough alone, CARandDRIVER procured a fifth GT-R, which returned almost identical 0-60 and quarter-mile times as the fourth vehicle, along with 420 hp at the wheels on the same dyno.

You can read all the details at CARandDRIVER.com, hear Nissan's explanation for the discrepancy and see charts of both the dyno pulls and the boost levels on two of the five vehicles.

Source: Autoblog

 

Great post

 

+1^

 

Good read.

 

great thread indeed. I'm glad someone stepped up and just dyno'd a few of them on the same dyno to see what exactly how much power they are making. I'm glad to see that it really is as fast as initially thought. Quite a performance bargain....if you can look past the hideous face lol

 

Earlier today we had a post about a Car and Driver dyno report on the Nissan GT-R that figures the car is running 520 horsepower. That’s up from Nissan’s claim of only 480 horsepower. In an exclusive interview with TopSpeed, Colin Price, Nissan’s product planning manager of sports cars, clears up the extra horsepower myth. Price was part of the GT-R’s development, and he simply says that the GT-R’s powertrain puts more power on the road.


Car and Driver found that when the GT-R was strapped to the dyno it would produce 415 horsepower at the wheels. Most cars loose about 20 percent of their power just getting the energy from the engine to the road. So 415 horsepower at the wheels would mean that the engine puts out about 519 horsepower. Price says that the GT-R is efficient enough that it looses only 15 percent in the transfer. With this calculation the GT-Rs that Car and Driver tested only actually had 488 horsepower. Price further explains that they were using 93-octane gas, which is not available in every state. California only has 91-octane, and that will get the horsepower figure down to close to 480.

So the GT-R is just a car that acts like it has 520 horsepower. Simple, right?

Source: Topspeed

 

... still a beast