Porsche has dropped the covers off its ultimate naturally aspirated 911 – the GT3 RS 4.0. Set to be the grand finale of the current 911 series, codenamed 997 this street-legal track racer will likely be the final special edition before an all-new model is unveiled at the Frankfurt Motor Show this September.
Limited to just 600 vehicles, there is some serious racing pedigree underpinning the GT3 RS 4.0 with the new model’s boxer engine using a crankshaft lifted straight from the 911 GT3 RSR racing car and the forged pistons’ connecting rods fashioned from titanium. It will be available exclusively with a six-speed sports manual gearbox.
The four-litre displacement sports engine, the biggest 911 model line engine ever, is also the most powerful naturally aspirated engine ever built by Porsche. Maximum power is now 368 kW (500
hp) at 8,250 rpm, that’s 92 kW of power per litre. Maximum torque is 460 Nm at 5,750 rpm.
The 911 GT3 RS 4.0 will offer some stunning performance with a recorded lap time of 7m 27s for the Nürburgring-Nordschleife. That’s 1.7 seconds faster than the Carrera GT and 6 seconds faster than the GT3 RS. So it’s a very serious machine.
German tuner 9ff has a set of conversion kits for the Porsche 997 GT3 and and 997 GT3 RS that it claims can turn a sports car into a supercar.
First off 9ff will stack on the power with a bi-turbo conversion kit that can boost output up to 1000 hp. This handily allows for the creation of 3 seperately named models: the 9ff GTurbo750, GTurbo850 and GTurbo1000. The numbers, naturally, denoting the horsepower figures. The torque figures are respectively 850 Nm, 910 Nm and 940 Nm.
Performance times for the golden boy GTurbo1000 are apparently 2.9 seconds for the 0 to 100 km/h sprint and a mere 8.2 seconds to reach 200 km/h. The 300 km/h mark is reached in just 16.5 seconds. A top speed of 392 km/h is supposedly possible, dependent on gearing selection.
An aerodynamic kit is also available from 9ff, which includes air intakes on the quarter panel for the intercooler and air outlets at the front to help reduce pressure in the wheel wells at high speeds.
There are also new front bumpers (with LED indicators) and rear aprons, side skirts and an option pack for side exhausts.
The aerodynamic kits is priced at 8,900 euros, with taxes, mounting and painting excluded.
A set of 5 double spokes light alloy wheels, 8,5×19″ / 11×19″ (front/back), can be had for a mere 4,980 euros and a set of GTurbo design rims with a central lock system comes in at 5,950, taxes and painting excluded.
Prices for the severe engine tuning mods have not made available.
9ff thinks that the standard Porsche 997 Turbo cabriolet is a smidgen slow and girlie. So, it boosted the 3.6-litre twin-turbo flat-six from 473hp to a mammoth 650hp by tweaking the ECU and swapping the exhaust, catalytic converter and air filter. Upgraded brakes are a no brainer, as are adjustable stabilisers front and rear with double springs at each corner.
The rear seats have been ditched (they’re only good for storing map books and amputees anyway), and a new body kit with some tasty air dams and diffusers has been applied. There’s no indication from 9ff what this will do to the performance, but we would expect that it will more than match the expected astronomical price.
The Porshce 997 Turbo is just too slow, when was 480 horsepower and 457 lb-ft of torque rotating all four wheels ever going to be enough. Well aware of this, Porsche came out with the more powerful GT2. However, 530 horsepower still isn’t going to cut it. You need the traction of AWD, and a lot more power.
Enter the Switzer Perfomance P800 997. Here’s its vitals: 800 hp, 0-100kph in less than three seconds and the standing quarter-mile completed in just over ten seconds. Now that’s proper fast, and the P800’s AWD, too.
So where does an extra 320 hp just appear from? Custom GT30 turbochargers, massive Switzer intercoolers, electronic boost control, upgraded headers and exhaust, plus a carbon clutch pack. It looks sharp in yellow too.
Check out the images of the P800 997 in the gallery and a short video clip below.
The Roock RST 600 LM was built to commemorate the Roock Racing victory at the 24 Hours of Le Mans. Roock’s extensive tuning program for the 997 Turbo RST 600 LM includes modified twin-turbochargers, titanium exhaust, proprietary fuel maps and engine management software. These exclusive upgrades allow the Roock RST 600 LM to produce a mindblowing 602 horsepower and a maximum torque of 611 lb-ft (827Nm), while maintaining daily drivability. Roock’s RST 600 LM charges from 0-60 in 3.1 seconds, topping out at 212 mph (341kph).
That’s just the beginning of the story. ROOCK has also added a carbon racing clutch for precise shifting and a tuned suspension that is fully adjustable in jounce and rebound. To ensure ultimate stopping power, ROOCK has equipped the RST 600 LM with new cross drilled and vented 380mm rotors, carbon swivel brake lines and 8-pot calipers. The revolutionary new 4-pad design improves brake “bite” while increasing brake control.
The interior is specially equipped with custom designed carbon fiber trim to order. The silver accented center console is modified to include an oil and temperature gauge and an exclusive push start button. Exclusive Roock-designed 4-point harness seats are adjustable with side support to further enchance the daily drivability, while keeping you legal on the track.
Elegantly designed body styling parts have been added to the exterior that include the original Roock front splitter, rear diffuser and Roock Le Mans rear spoiler. The RST 600 LM is fitted with new Roock F1 Ultra super-light aluminum racing wheels with custom Roock signature carbon fiber center caps, and high performance tires.
Roock AutoSport, based in Atlanta, GA, is the only German-owned Porsche tuner with a U.S. headquarters. Roock offers unique, high quality products and performance systems for the Porsche Boxster, Cayman, Cayenne, all 911 models, Carrera GT, and is currently developing a Roock version of the soon-to-be-released Porsche Panamera.