Preview: 2007 Porsche 911 Turbo

[911S Targa]

http://autos.msn.com/advice/article.aspx?contentid=4024058

[unclebilly]

"Even more power goes online for 911 Turbos equipped with the optional Sports Chrono Package. Pushing the Sport button on the center console makes a number of adjustments to engine management and suspension—the most intriguing adjustment being the Overboost function. Under full throttle, the blades of the turbochargers are angled to increase maximum pressure by 2.9 psi for up to 10 seconds. During this time, maximum torque is increased to an amazing 505 lb-ft—an increase of 45 lb-ft. It's akin to the boost button on a video game. "

- Did they get this right? How do they change the pitch of the impellers for 10 seconds? I'm aware of variable pitch props for boats etc but these don't spin at 50,000 rpm... and at 600°C...