Vic, can you explain how a 570 AWHP car traps only in the 128-130 range, but runs a 0-250 KPH in 13 seconds?

http://videos.streetfire.net/video/R...570_649110.htm

 

The one in the video boasts 710hp...

It's entirely possible with high octane fuel... don't they have like 95oct in the ME?

25mph in 3 secs? sure.

With high octane and the rear section exhaust, and the fact that 13.99 is still a 13sec run... why not?

 

There is no way the car in the video above does 0-250kph in 13s. If you watch the time on the video it takes at least 8s to go from 100-200kph which is about 9s 60-130mph which is pretty slow on this board.

 

Jasper, are you saying that it is not the same 570 kit? I was under the impression that HKS570 kits read 570 AWHP...

 

... on average. Every car is different. I wasn't there for the dyno, I don't know where they got that 710hp figure from, but I did notice they didn't specify 'W'HP.

But 570awhp on what? I believe too many variables play into this... Was it on a Mustang? Dynojet? Corrected? I believe it is just a ballpark figure. Usually GT570 kits with tunes can net over 600awhp. The video didn't mention if it was tuned or not. Or if they raised the boost somehow or what. I noticed that the boost was pretty stable around 16-15psi for most of the run.

The high octane will make it have even more power than advertised as well...

A few GT-R's have reported that a Cobb Stage 1 tune with 100oct can get high 10's.

After looking at the video and not being able to see how much fuel is in the car, we could assume that the passenger might weigh on average 200lbs, and that if they had full tank, it is easy to drop 300lbs, and increase the acceleration.

 

My mate's JDM R35 had HKS GT570 fitted without any COBB,He got 377.8 awkw,about 508 awhp,not 570 awhp..It produce around 590 crank hp without COBB.

 

I suspect they are assuming ~ 20% drivetrain loss, thus 570whp/.80 = roughly 712 crank hp (ie very close to the figure they quoted).

 

That sounds about right... But that is still an assumption then, and not based on any dyno numbers.

 

The GT-Rs body is quite effficient: a 0.27 coefficient of drag. A slippery shape, superior downforce at both axles and enhanced airflow to cool mechanical components. The GT-R spent 2 years at the rolling road tunnel at Group Lotus in Europe and 1.5 years in Yo****aka Suzuki in Japan. being fine tuned for aerodynamics.
The looks of the GT-R are not european sexy, but more of a robotic muscular look. The engineers thought that most GT-R owners would also own european sports cars as well, so they wanted the GT-R to look very Japanese when sitting in a garage with other high end sports cars.

 

I agree with that, but I still can't understand how a car that supposedly was engineered to a higher level still weighs what it does. I mean the 997 TT is hardly a stripped out track car, its more of a GT car even and it weighs a considerable amount less.

 

I think they aimed to beat the 997TT at low speeds (below 100mph) and on twisty track courses. These also happen to be the conditions in which cars are most likely to meet on the street.
They could have lowered the weight but it would have done violence to the price. The japanese sport car makers have learned that to compete with the germans they must offer comparable or better performance at a significantly lower price.

 

From all of the Nissan speak about the GTR they never admitted to any compromises due to pricing. If you hear them speak they engineered the car to weigh what it does. Now the Spec V comes out and although it weighs 200 lbs less , its still amazigly heavy for what is supposed to be the worlds best sports car.

 

I don't understand either why the GT-R is heavy. It does use many lightweight materials for its frame, structure and components. Here are curb weights I got from Road and Track:

Curbweight: Testweight:
GT-R= 3800 lbs 3960 lbs
997TT=3550 lbs 3710 lbs
Z06=3190 lbs 3350 lbs

 

Sounds like Nissan PR talk

 

We all have a little bit of fanboi in ourselves but the GTR seems to be the fanboi car of choice!