The dyno results:
After several very consistent pulls, the GT-R generates 406 hp at 6,000 rpm and 399 lb-ft of torque at 3,800 rpm. The power curves are a little bumpy as the output fluctuates slightly, but they're impressive otherwise.
Like the GT-R, the ZR1's engine pulls very consistently over several runs. The final numbers are 505 hp at 6,200 rpm and 494 lb-ft at 6,200 rpm and the power curves are nearly perfect. No bumps, no dips, nothing.
zero to 60 mph is 3.8 seconds (3.5 seconds with 1 foot of rollout like on a drag strip). The quarter-mile goes by in 11.8 seconds at 118.6 mph
0-60-mph time of 3.8 seconds (3.5 seconds with 1 foot of rollout like on a drag strip) and a quarter-mile time of 11.5 seconds at 128.3 mph.
slalom cones the ZR1 shocks again, with an average speed of 74.7 mph. Not only is this fractionally faster than the all-wheel-drive GT-R's 74 mph, it smokes the GT2's 71.6 mph by a long shot and leaves the last Corvette Z06's 69.2 mph feeling a bit slow.
Streets of Willow Springs :
Our test driver hops in the GT-R, quickly gets up to speed and lays down some solid laps right out of the gate, the quickest clocking in at 1:25.09. He then moves to the Corvette, which takes a little more time to sort out. The lap times drop quickly, though, and the ZR1 finally posts a fastest lap of 1:23.87.
There's very little brake fade and the grip from the Bridgestone Potenza RE070s is considerable. If your driving skills slot anywhere below that of an SCCA road-racing champion, you'll probably go faster in the GT-R.
The GT-R would have been quicker on the Dunlop Sport tires. Might have given the ZR1 a run for its money.
So far, the ZR1 is mighty comfortable and massively powerful, but there are problems, too. The steering column shudders so much that we actually think there might be a flat tire at one point (a faulty tire-pressure warning sensor isn't helping), while the driver seat is a shapeless blob of leather and foam better suited to watching 12 straight hours of Saturday college football than a 200-mph supercar.