Skip past the one-minute mark to get to the dyno action, then listen to the big V-8 as it spins up the roller on its way to one heck of a photogenic set of curves.
With torque nearly flat from 2,500 rpm to redline and horsepower that builds like a tsunami, the figures show the rated 505-horsepower is perhaps a bit conservative, as this dyno run pulled 455 horsepower and 420 pound-feet of torque at the wheels.
That’s just 10% drivetrain loss if the rated 505 horsepower at the crank is correct. The torque figure likewise reflects either rather small drivetrain losses or a slight underrating of the engine, with just 13% of the 481 pound-feet of torque at the crank lost on its way to the wheels.
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Of course, this is just one car and one dyno—the figures may not mean much at all in absolute terms. But as a first data point, it looks like the Z/28’s powertrain is more than ready to deliver.