The ZR1 is out already and does the 1/4 mile in 11.3 seconds.
The regular GTR does 1/4 mile in 11.7 seconds(some magazines have it as low as 11.5). The GTR V-Spec will weigh 330 lbs less and have anywhere between 40 and 70 more horsepower than the regular GTR.
So what do you expect the 1/4 mile...