The modifications include improved engine response in the mid to upper rev range, increased body strength and changes to the GT-R’s dampers, springs and front stabiliser.
Nissan says the changes result in significantly improved performance, high-speed stability and better ride quality.
Despite the fact that the 3.8-litre twin-turbocharged V6 engine’s peak outputs are unchanged at 404kW of power and 628Nm of torque, the various enhancements to the powertrain and chassis have reduced the 2013 GT-R’s 0-100km/h sprint time to just 2.7secs (down from 2.8secs for the 2012 GT-R).
Engine - Sharper mid-range engine response and improved high-end acceleration
• Higher-output injectors that more precisely control fuel injection improve mid-range engine response and acceleration at higher rpms.
• A specially developed relief valve for the turbocharger bypass suppresses the rapid decrease of forced-injection pressure, helping to sustain acceleration at high rpms.
• A specially designed baffle plate for the oil pan ensures the oil pressure is better stabilised while rotational friction within the oil pan is reduced, especially during high-performance driving.
• Motul Competition Oil is offered as an option following numerous requests from GT-R customers who frequently drive their cars at circuits.
Chassis - Glued-to-the-ground handling and rock-solid stability at high speeds
• Lowered centre of gravity thanks to revisions to the dampers, springs and front anti-roll bar
• Cam bolts on the front suspension improve camber accuracy and stability.
• Increased torque from the driveshaft to the hub bearings improves reliability in high-stress situations, such as track driving.
Body - Improved driving stability and steering response
• Reinforcements added at two locations in the dash panel bar and instrument panel member result in improved suspension performance and increased body rigidity.
Nissan will also offer the GT-R in three distinctive trims: Pure, Black and Premium editions.
The Pure Edition will get contrast stitching, as well as a thicker seam on the instrument panel and door trim.
The Black Edition is fitted with a red-and-black steering wheel, while Recaro carbon seats are available as an option.
The Premium Edition will feature a two-tone interior of Amber Red and Black in addition to hand-stitched semi-aniline leather upholstery.
All 2013 Nissan GT-R models get new seat knobs on the on the left and right sides of both front seats for added convenience, while options include a carbonfibre rear spoiler and lightweight Rays forged alloy wheels on the Black Edition, and a rear-view monitor is standard on both Black and Premium editions.
Nissan Australia will confirm the specifications of the 2013 Nissan GT-R closer to the car's launch in February.