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BMI - Amuse r35 gtr

YouTube

from the vid we can say that tuners are definitely finding a way around the new GTR's restrictions... and it might be safe to say that nissan hasn't under-rated the 480 ps power figure given the dyno comparison of stock vs tuned in the vid, but if anyone can understand or read japanese and sees otherwise plz correct me

so hurry up and watch b4 it gets removed :-)

From the in-car footage, that thing looks f-ing FAST around Tskuba! Not crazy about the looks, but you can't argue with the performance.

I think it's a good decision that they upped the displacement from 2.6 to 3.8

Amuse GTR is stunning! 59s is a hell of a time at Tsukuba. Now only if the car was lighter! (*crossing fingers for the V-Spec*)

As for the stock GTR - power figures're underrated from the factory for sure. It's around 40hp more at the crank compared to officially declared. Make no mistake here. And FYI this isn't the first time Nissan pulls this trick. R34 GTR was claimed to have output of maximum JDM allowed 280hp while it's real output was proven to be 327hp at the crank. Same story with R33 GTR, it was underrated by a good 20 hp. Looks like that "underrated from the factory" thing becomes a part of GTR heritage.

add:

Brief translation from one of the YouTube comments:

Quote:

an inaccurate translation
Tuning on this car was done to draw out full potential of the stock parts. This car was designed as Amuse's consept of a Spec-V. We went to Amuse's workshop located at Kisarazu to interview the details.

285/35ZRF20 tyres used on the rear of normal GT-Rs were fitted on the front on the Amuse GT-R to counter understeer. To add downforce at the front a large front spoiler was developed. The rear wing was also enlarged and is made of dry carbon to reduce weight.

The front seats were replaced with full bucket seats (Recaro SP-A's) and the rear seats, rear speakers were removed. This resulted in a total of 59.3kgs weight loss, but equipments like air-con and audio were left in. The cat back exhausts were replaced with a light weight titanium system, diameter enlarged 10%. The original Bilstein suspension was left in, but changes were added to lower the ride height.

The weather was fine on testing day, and the car went on its 1st lap to check for problems.
[Tsuchiya in the car] Hmm, the car feels quite good... So, I'll begin the lap to see how fast she can go.
No problems have emerged, so he goes on his attack lap.
Amazingly, the car goes under the targeted time of 1 minute on its check lap.

[Tsuchiya]The suspension on this car is awesome. Wow this is a good car. I want to teach the Nissan guys about this car's suspension, the way the car handles, how the car turns in and how it settles down... if I worked at Amuse I'd try to sell this setup to Nissan. The Amuse GT-R is really easy to handle, its so different from the normal GT-R. Its pliant, safe, and fun to drive.

[T]So should I go for more laps?
[A]We still have 1 fresh set of tyres
[T]I have to get used to this car,maybe I'd do a few more laps then switch to the fresh set.

To get accustomed to the Amuse, Tsuchiya takes a few more laps.

[T]the car understeers a bit.. if the tyres were fresh it'd be better. Now if I could go full throttle here.. and the last corner, if I take a wider line in and try to accelerate out of the corner in a straight line.. not like what we take on a light-weight car.

Tsuchiya improves his time on this lap, and now its time to use the new tyres.

Its P.M. 2:30 and Tsuchiya goes on his final lap of the day.
[T]Wow, heavy understeer... the car understeers more then on the used tyres....
Unfortunately no improved lap time on the new tyres.

To see how much horsepower the Amuse GT-R is producing it was dynoed. Amazingly, the car was now producing 585.2ps with only a ECU mod and a cat-back exhaust replacement.

To understand why there was so much increase in horsepower, the car was dynoed with its cats removed with the original ECU . Though this tuning was reckless (on some cars this could produce too much boost and blow the engine), a clean increase in horsepower from low rpms to high rpms was seen.

Looking at the turbo boost pressure revealed that without the cats, the boost pressure rose steeply at low rpms but after 3000rpms the boost was lower than with the cats. This means the ECU monitors and corrects the amount of boost pressure used. Amuse claim that the VR38DETT is a tuneable and reliable engine. The modding of the VR38DETT's ECU enables the engine to use different boost pressures at different rpms.

The Amuse GT-R's boost pressure data shows that during low rpms used most likely during cornering boost pressure is lowered to enhance response, while at high rpms the boost is set to about 1kg/cm2

Last, we'll show a uncut vid of the best lap.

[T]We were able to go under 1min, but we were faster using used tyres. Track conditions, temps, and maybe the tyre block wobbling on the new set came into affect and produced more understeer than on the used tyres.

[T]Now if I used a few more new sets and got to understand the Dunlops better, the Dunlops do better if you try to enduce light oversteer, no counter-steering, the lap time could become around 59.5 secs. Next time around, I'd like to aim for that (59.5) time.

So you can tune the new gtr.
I wonder how fast the new gtr's will be in a couple of years

Amazing... a 59' lap at Tsukuba with so little tuning and so much weight! I just watched the Rev Speed Tsukuba Super Lap Special and those street tuned R34s and R33s with 600+ Bhp were having difficulties just doing 1 min flat. I'd love to see what this Beast from the East can do with some more tuning to the differentials and suspension...
Engine seems very nice, turning up the boost 'a bit' :) A worthy replacement for the RB26 then!

What are some comparison times for cars around Tsukuba? I'm not familiar with it. :-)

Thanks for the vid, definately seems quick!

I believe in a 5 lap race from a recent episode, the new e92 M3 was doing around 1:06 and the IS-F was around 1:07. Granted, those are in-race times and the time attack may have been a little faster, but not much. So you can see that a 59 sec lap is pretty much flying!

Quote:

Originally Posted by styla21 (Post 821439)

What are some comparison times for cars around Tsukuba? I'm not familiar with it. :-)

Tsukuba is a short (2km) relatively slow circuit. Basicly any car that gets beyond 1 minute there can be rated as fuken quick.

Tsukuba laptimes:
- Production cars: http://www.fastestlaps.com/track3.html
- Tuned cars: http://en.wikipedia.org/wiki/Tsukuba...it#Time_Attack

For the reference, ARTA NSX GT500 race car has ran 51s there: http://www.gtchannel.com/content.php?cid=231

Toffytofik, thanks for the links! No doubt the GT-R is insanely quick.
Thanks for the vids, also Sapetoku. :-)

This doesn't make sense to me though: According to http://www.fastestlaps.com/track3.html
#1. Lamborghini Superleggera 530hp / 1520kg
#2. Nissan GT-R 479hp / 1720kg

How is the GT-R that good, that it runs the same lap time, being underpowered, but 200kg heavier than the Lambo? I really, really respect the GT-R is insanely quick!
......But I just can't digest (or accept) that it can outrun both the F40 or Mclaren F1.

And how the hell does the old m3 (#22) faster than the New E92 m3 (#29)?? Unlikely.
How reliable are these tests? :?:

^ cud be many reasons; different level of driver skill, tyres, driver consistency, track conditions, all those computers in the gtr, rumors that the gtr's power figure is underrated etc...honestly u could go crazy analyzing lap times :tard: