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Porsche 911 GT3 R Hybrid 2.0 Preview

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On: Mon, Mar 21, 2011 at 5:22PM | By: Chris Weiss


Porsche 911 GT3 R Hybrid 2.0 Preview

It was just over a year ago that Porsche introduced the 911 GT3 R Hybrid. The innovative track hybrid features a combination of rear-mounted 480-hp V6, two front-mounted electric motors and a flywheel generator in place of a battery pack. The generator pulls power from regenerative braking and distributes it to the front motors when needed for short bursts of acceleration.

Apparently the original R Hybrid has grown long in the tooth in that short year span. Porsche has previewed a revised version which will officially debut at the 24 Hours of Nurburgring in late June.

The new 911 GT3 R Hybrid keeps the same powertrain but loses some weight and gets a little extra power. Both front motors increase in size to 75 kW (from 60) and now deliver nearly 200 extra horses worth of power for accelerating. That power can be applied automatically when hitting the throttle pedal or can be accessed manually when the driver needs it for passing another car.

Porsche cut 110 lbs. from the car's total weight which is now down to 2,860 lbs. While Porsche doesn't expect this to affect the R Hybrid's lap times, the weight loss along with a drop in drag does make the car more efficient.

Hartmut Kristen, head of Porsche Motorsport, explains: "The emphasis of our work was on improving efficiency. That means we want to keep the lap times consistent with 2010 but use less energy, hence less fuel. In this way, we support future developments of road-going, sporting hybrid vehicles."

In terms of looks, the updated 911 GT3 R Hybrid gets some subtle changes on the exterior, such as the loss of the large louvres toward the rear fenders. Inside, Porsche has redesigned the cabin, moving most of the controls to the steering wheel and center console. The backlit buttons on the console were designed to optimize the driver's control in the dark.

The new Porsche 911 GT3 R Hybrid will make its racing debut at the 24 Hours of Nurburgring on June 25.


PRESS RELEASE:

Porsche Takes on Nurburgring 24 with An Even More Efficient 911 GT3 R Hybrid

Stuttgart/Atlanta March 17-- Porsche AG will enter the Nürburgring 24 hour race on June 25, 2011, with a more advanced version of the Porsche 911 GT3 R Hybrid. The priority for this latest edition was improvement of efficiency through the targeted optimization of hybrid components, which also resulted in a 20 percent weight reduction. Version 2.0 of the 911 GT3 R Hybrid is intended to achieve the same lap times as its predecessor but with less fuel consumption.

The general layout of the hybrid was adopted from the 2010 model. A portal axle with two electric motors drives the front wheels and supplements the four-liter - depending on the balance of performance classification - approximately 470 hp, six-cylinder boxer engine at the rear. The output of both electric motors has increased from 60 to 75 kilowatts each. For bursts of multiple seconds at a time, drivers now have almost an additional 200 hp at their disposal with the 911 GT3 R Hybrid 2.0. Depending on the programming, this power is automatically activated through use of the throttle pedal. Moreover, pilots can manually call up this extra power, for instance when overtaking.

The electric flywheel accumulator, with its rotor spinning up to 40,000 rpm and storing energy mechanically as rotational energy, is now housed with the other hybrid components in a carbon fiber safety cell on the passenger's side.

At first glance, the new GT3 R Hybrid is clearly distinguishable from the 2010 model. Thanks to the optimization of the hybrid system's high voltage components, the large louvers in front of the rear fenders were no longer necessary. This reduces drag and also lowers fuel consumption. All in all, the weight of the vehicle decreased from 1,350 to 1,300 kilograms.

"We've collected a great deal of information from our races on the Nürburgring, at the ALMS race at Road Atlanta, as well as from the ILMC race on China's Zhuhai circuit. The data was invaluable for the further development of our racing laboratory," says Hartmut Kristen, head of Porsche motorsport. "The emphasis of our work was on improving efficiency. That means we want to keep the lap times consistent with 2010 but use less energy, hence less fuel. In this way, we support future developments of road-going, sporting hybrid vehicles."

The cockpit of the 911 GT3 R Hybrid has also been completely revised. Most of the displays and controls have moved to the steering wheel. Drivers can operate the rest of the functions via backlit buttons now situated on the centre console. Priority was placed on the ergonomics and the clear layout for pilots – particularly in darkness.

The new 911 GT3 R Hybrid is a perfect example of the 'Porsche Intelligent Performance' philosophy, a principle found in every Porsche - more power on less fuel, more efficiency and lower CO2 emissions – on the race track and on the road.
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