Porsche 911 991.2 RSRDate of unveil by Porsche AG: November 16, 2016 (prototype May 12, 2016)
Premiere: 2017 January 28-29, Daytona 24h
Engine: 4.0 B6 normally aspirated, 375 kW (depends on air restrictor)
Gearbox: Sequential, 6-speed with 3-disc clutch, magnesium casing
Weight: 1243 kg/2740 lb by regulations
Two decades after the different 911 GT1 cars - 993 GT1 '96, 993 GT1 Street, 996 GT1 '97, 996 GT1 Street, 996 GT1 Evo '98 - the mid-engined 911 is back! In order to install a proper diffuser under the rear end of the 991, the engine had to make room for it and the engine/transmission unit was rotated 180 degrees. The 911 was Caymanized, so to speak. Now you probably remember when the Cayman came out in 2005, it was said to handle better than the 911. The wheelbase of the 991.2 RSR was extended to 2516 mm. In comparison Cayman GT4 has 2484 mm, 991.2 GT3 Cup has 2456 mm and 991.2 Carrera/Turbo have 2450 mm. So, the rear wheels were moved back 1.3-2.6"/32-66 mm depending on how you look.
The extended rear diffuser, a top-suspended rear wing and the new side mirrors help to increase downforce with reduced drag. While the 911 GT1 cars were the ultimate mid-engined 911s with their turbocharged engines, the FIA rules restrict the engine power and there was no reason to equip the 991.2 RSR with a turbo engine. The normally aspirated 4-litre flat-6 was taken from the 991 GT3 R (used also in the 991 GT3 Cup 4.0).
The 991.2 RSR features a radar-supported Collision Avoid System which means now the faster LMP prototypes are detected behind early enough and misunderstandings can be avoided. On a cockpit monitor arrows indicate when vehicles are behind. Depending on the colour of the arrows, the driver knows whether the trailing car is coming closer or falling back. For the driver safety, the seat is now closer to the center of the car and is rigidly mounted (a new FIA rule). The movable pedal box (as well as brakes), come from AP Racing.
Between March and November 2016, the prototypes were tested for a total of around 22.000 miles/35.000 km which is more than with any previous Porsche GT racing car.
7 RSR were built by Porsche Motorsport for the 2017 racing season: 3 for testing, 2 for the FIA World Endurance Championship and 2 for the IMSA SportsCar Championship. It took 4 employees 10 working days to build one 911 RSR.
The GT LM class was so competitive at 2017 Daytona 24 hour race that seven (!) competitors finished the race within 7 seconds! While in the middle of the race Porsches were 1-2 in class, the final GT LM result was: 1. Ford GT, 2. 991.2 RSR, 3. Ferrari 488, 4. Corvette, 5. Ford GT, 6. 991.2 RSR, 7. Ford GT. Remember, all they covered 652 laps and were just 7 seconds apart after 24 hours! Thanks to BoP (Balance of Performance) rules the cars are very equal and this makes the races really interesting to follow.
Sports car racing is not a subject of public interest in USA and therefore Daytona 24 hour race cannot be compared to the Le Mans 24 and Nürburgring 24 hour races which gather more than 200.000 spectators. No spectators, no money, IMSA has to lean even on alcohol producers. The Daytona 24 drivers had to hold alcohol bottles in their hands on the podium. Really?
|Date||Championship||Race||Porsche factory team results for 911 991.2 RSR|
|2017 Jan 29||IMSA Sportscar Championship + North American Endurance Cup||Daytona 24 hours||2nd||6th|
|2017 Mar 18||IMSA Sportscar Championship + North American Endurance Cup||Sebring 12 hours||3rd||8th|
|2017 Apr 08||IMSA Sportscar Championship||Long Beach 100 minutes||3rd||6th|
|2017 Apr 16||FIA World Endurance Championship||Silverstone 6 hours||3rd||DNF|
|2017 May 06||IMSA Sportscar Championship||Austin 160 minutes||4th||DNF|
|2017 May 06||FIA World Endurance Championship||Spa 6 hours||5th||6th|
|2017 Jun 17||FIA World Endurance Championship||Le Mans 24 hours||4th||DNF|
|2017 Jul 02||IMSA Sportscar Championship + North American Endurance Cup||Watkins Glen 6 hours||6th||7th|
|2017 Jul 09||IMSA Sportscar Championship||Bowmanville 160 minutes||6th||7th|
|2017 Jul 16||FIA World Endurance Championship||Nürburgring 6 hours||2nd||3rd|
|2017 Jul 22||IMSA Sportscar Championship||Lime Rock 160 minutes||2nd||4th|
|2017 Aug 06||IMSA Sportscar Championship||Road America 160 minutes||2nd||DNF|
|2017 Aug 27||IMSA Sportscar Championship||Virginia 160 minutes||7th||8th|
|2017 Sep 03||FIA World Endurance Championship||Mexico City 6 hours||3rd||5th|
|2017 Sep 16||FIA World Endurance Championship||COTA 6 hours||2nd||6th|
|2017 Sep 24||IMSA Sportscar Championship||Laguna Seca 160 minutes||3rd||7th|
|2017 Oct 07||IMSA Sportscar Championship + North American Endurance Cup||Road Atlanta Petit Le Mans 10 hours||5th||6th|
|2017 Oct 15||FIA World Endurance Championship||Fuji 6 hours||2nd||3rd|
|2017 Nov 5||FIA World Endurance Championship||Shanghai 6 hours|
|2017 Nov 18||FIA World Endurance Championship||Bahrain 6 hours|
Although without race victories, Porsche could win the 2017 IMSA North American Endurance Cup GT LM class in Drivers and in Teams categories (Ford won in Manufacturers category). At the NAEC the points are awarded many times in one race - after each of 3, 4 or 6 hours depending on the length of the race.
Article © James Herne / Stuttcars.com
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