Early dyno tests show ZR1 makes 535hp (400kW) at the wheels
The first car was a Cyber Gray example with just 30 miles on the clock. On its first run, the car made 530hp (395kW) and 508lb-ft (688Nm) of torque at the wheels. Thinking the cars were running a bit rich from the factory, PCM made some ECU adjustments and managed a second run of 567hp (423kW) and 532lb-ft (720Nm) of torque at the wheels. The second car already had 200 miles and made 540hp (403kW) at the wheels on its first attempt.
Factoring a reasonable 15% drivetrain loss, the 535hp figures puts the ZR1’s flywheel output at around 615hp (460kW) – not bad considering the official figures for the car are 638hp (476kW) and 819Nm (604lb-ft) of torque.
The big question is how does it compare with one of its main rivals, the Nissan GT-R? Recent dyno tests of the Nissan showed that the Japanese supercar measured a peak output of 452hp (337kW) and 448lb-ft (606Nm) of torque at the wheels.
Via: Corvette Forum