The software update affects the way the vehicle launches from a standstill in two main ways. It increases the allowable rpm level beyond the current 2,000rpm limit when the VDC traction control system is switched on, but sadly it also decreases the maximum allowable rpm limit when the VDC is switched off from 4,500rpm to 3,000-3,500rpm. The news of the unofficial acceleration times comes from GT-R Blog's insiders at the Nissan Tochigi Assembly plant, where engineers have been testing the new car.
The new software immediately concerned many who saw the nanny system as a bane to fast acceleration times. But the reports keep coming that the first batch of cars with the updated software have been received positively and are proving to be just as quick, if not quicker, than the original GT-Rs when it comes to the drag-strip.
One GT-R owner with the updated software has posted a quarter-mile time of 11.347 seconds at 120.85mph, according to DragTimes, and this was with stock Dunlop tires. Incidentally, this time is quicker than official times posted by many reviewers during the launch of the original car last year.
One thought is that by lowering the maximum RPM levels at launch, less wheel spin occurs and the car launches of the line both quicker and more smoothly. Now, if only someone would hurry up and test the new SpecV model.