241 Porsche 911 RSR (1973)
Porsche 911 RSR (1973) Engine 2900cc Flat 6
Registration Number DBY 702 M (London)
PORSCHE SET
www.flickr.com/photos/45676495@N05/sets/72157623690528015...
Rule changes for the 1973 season, made Porsches devastatingly quick 917 obsolete for the World Sportscar Championship, and building a replacement for this catagory impracticle.
So Porsche turned their attention to building a 911 based car to contest the new European GT Championship, the 911S was chosen as the base car on which to develope the companies new Group 4 weapon. The main focus was to reduce weight and increase the output of the flat 6 engine. The 911s 2.4 litre engine grew to 2.7 litres and an extra 20bhp to 210bhp, to maintain traction wider rear wheels were fitted weight was saved by stripping the 911 of all luxuries and the use of fiberglass and thin gauge steel for various bodyparts, resulted in the arrival of the 911 Carrera RS 2.7.
Production went well over the FIA required 500 example to homologate the car for the 1973 GT Championship. The rules allowed for some modifications to be made to the racing cars compared to the road cars.and the most obvious differance between the RS 2.7 and its Carrera RSR racing sibling was an increase in engine size to 2.8 litres increasing power by a further 100bhp, even wider rear wheels and wider wheel arches orsche 917 derived vented and cross drilled discs replaced stock brakes and weight was reduced even further.
The car won on its racing debut at the Daytona 24 Hours, the 911 Carrera RSR beating much larger engined cars, and in the ETC (European Touring Car Championships) they proved almost unbeatable, adding victories in the Sebring 12 Hours and the Targa Florio.
Further developement mods during the season made it inelligable for 1974, these modifications were fitted to a new series of 50 road cars, the 3 litre Carrera RS 3.0, powered by an exoanded 2992cc engine with K-Jetronic Bosch fuel injection producing 230 PS in road trim, which made the RSR 3.0 eligible to race in 1974. The chassis was largely similar to that of the 1973 Carrera RSR, the use of thin metal plate panels and a spartan interior enabled the shipping weight to be reduced to around 900 kg (1984 lb).
The new car continued the 2.8's dominance in the Group 4 class and so did its replacement, the Turbocharged 934 of 1976.
Many thanks for a fantabulous 41,157,588 views
Shot at the Chateau Impney Hill Climb, Chateuu Impney, Droitwich 12 July 2015 - Ref 108-241
241 Porsche 911 RSR (1973)
Porsche 911 RSR (1973) Engine 2900cc Flat 6
Registration Number DBY 702 M (London)
PORSCHE SET
www.flickr.com/photos/45676495@N05/sets/72157623690528015...
Rule changes for the 1973 season, made Porsches devastatingly quick 917 obsolete for the World Sportscar Championship, and building a replacement for this catagory impracticle.
So Porsche turned their attention to building a 911 based car to contest the new European GT Championship, the 911S was chosen as the base car on which to develope the companies new Group 4 weapon. The main focus was to reduce weight and increase the output of the flat 6 engine. The 911s 2.4 litre engine grew to 2.7 litres and an extra 20bhp to 210bhp, to maintain traction wider rear wheels were fitted weight was saved by stripping the 911 of all luxuries and the use of fiberglass and thin gauge steel for various bodyparts, resulted in the arrival of the 911 Carrera RS 2.7.
Production went well over the FIA required 500 example to homologate the car for the 1973 GT Championship. The rules allowed for some modifications to be made to the racing cars compared to the road cars.and the most obvious differance between the RS 2.7 and its Carrera RSR racing sibling was an increase in engine size to 2.8 litres increasing power by a further 100bhp, even wider rear wheels and wider wheel arches orsche 917 derived vented and cross drilled discs replaced stock brakes and weight was reduced even further.
The car won on its racing debut at the Daytona 24 Hours, the 911 Carrera RSR beating much larger engined cars, and in the ETC (European Touring Car Championships) they proved almost unbeatable, adding victories in the Sebring 12 Hours and the Targa Florio.
Further developement mods during the season made it inelligable for 1974, these modifications were fitted to a new series of 50 road cars, the 3 litre Carrera RS 3.0, powered by an exoanded 2992cc engine with K-Jetronic Bosch fuel injection producing 230 PS in road trim, which made the RSR 3.0 eligible to race in 1974. The chassis was largely similar to that of the 1973 Carrera RSR, the use of thin metal plate panels and a spartan interior enabled the shipping weight to be reduced to around 900 kg (1984 lb).
The new car continued the 2.8's dominance in the Group 4 class and so did its replacement, the Turbocharged 934 of 1976.
Many thanks for a fantabulous 41,157,588 views
Shot at the Chateau Impney Hill Climb, Chateuu Impney, Droitwich 12 July 2015 - Ref 108-241