The Nissan GT-R has become the sports car that represents Japan. The 2015 model, released last November, gets mostly no changes in its exterior design or equipments. However, Nissan had been hard at work improving its handling and stability for high-speed performance. Especially, the entire suspension system saw tweaks. “You could say that it was completely reformed”, said GT-R development chief Hiroshi Tamura.
As the name suggests, the GT-R is designed to be comfortable on the road as a GT car. At the same time, is a multi-performance sports vehicle that pursues the performance of a race car with its technology and background in motorsports. For the 2015 model, the engineers sought to make it as fast as possible, as before, but instead of raising its power or retuning its suspension in its hardest settings, they’d sought to create the ultimate GT car in its basic setting. Nissan used words like “traceability” and “linearity” to describe their efforts.
Improvements were made to the suspension, tire material, braking, drive train controls, ECU, and others. Engineers say the GT-R ought to be “completely stable at 300km/h, and without the need for corrections at high speeds”.
The suspension restrains any unintended vehicle movement, making it possible for drivers to drive at their own will. This was due to the changes in the characteristics of the damping force of the shock absorber and the ECU tuning. In addition, they improved its ability to absorb imperfections on road surfaces and enhanced its sense of security when driving by reviewing the tire material and its internal structure. At the same time, its overall ride comfort has also improved.
Furthermore, Nissan improved its control in order for it to run along with the driver’s intention and to present a smooth feeling from the start up. This is a result of them changing the form of the brake pad and the seam between the caliper pad and piston spreader. This has also reduced the unpleasant sound while maintaining braking performance.
Next, they improved the vibration when turning the accelerator on and off and suppressed the noise and vibration when driving by further tuning the transmission and engine, and optimizing the gaps on the structure such as those on the transaxle and drive shaft. In addition, they changed the bearing specification in the flywheel housing to improve how quiet it is.
For the exterior changes, they used double spoke aluminum-forged wheels made by Rays Wheel that were only offered in the premium edition as the official manufacturer option. In addition, they improved its silentness by reviewing the trunk carpet material and improving the shift lever to reduce the rattling noise when shifting gears.
While the 2015 model stands between the GT-R and the Nismo GT-R in terms of specification and price aspects, they also added a new Track Edition which focuses more on a sporty drive setting by adding the Nismo-exclusive parts on the base GT-R model.
(Translated by Natassia Jeronne D. Martinez)