Find out why this RSR-style, air-cooled Porsche 911 is a great way of getting into classic Porsche racing
by Dimitar Angelov on August 8, 2024, 13:30When Porsche slaps the RSR (Renn Sport Rennen) designation on a 911, you know it means business. These are the most hardcore, racing variants of the rear-engine sports car and their sole purpose is to race at the highest level of competition possible. The original Porsche 911 RSR was an evolution of the already-iconic, Porsche 911 Carrera 2.7 RS. Lighter, faster, and more aerodynamically busy, the Porsche 911 RSR was developed for the 1973, but actually, saw racing in late 1972. In February, 1973, the original 911 RSR won the 24 Hours of Le Mans.
The 1973 Porsche 911 RSR was produced across 1,508 examples, but there were a couple of different variants along with some conversions. The car showcased here isn’t one of those cars. Instead, it is a 1970 model that was modified from the ground up, by renowned classic 911 specialists. Given the value of the original 1973 RSR cars, here’s why this faithfully-executed, 911 RSR homage might be the perfect track weapon for those interested in getting behind the wheel of an air-cooled 911 race car.
This custom 911 RSR build was conceived by renowned names in the classic 911 community
Built, raced, and originally owned by 901shop, this RSR 2.8 (actually, a 3.0-liter) race car is fresh after an engine and transmission rebuild, performed in conjunction with Dawes Motorsport. The current seller is Goberian Motorsports and the Racecarsdirect advers boldly states that "This car is the best of the best, period". Between 2022 and 2024, the car has received work amounting to over $40,000 (receipts included). Here are some of the things done to the car:
Work done | Amount |
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Engine and transmission rebuild | approx. $40,000 |
Pyrotect Racing cell bladder | $1,595 |
New oil cooler | $1,100 |
OMP racing seat | $1,000 |
New Sabelt harness | $595 |
Fire Bottle and electric controller | $450 |
Built to tackle Group 5 racing
Despite the original 911 RSR having a 2.8 designation, it was powered by a 3.0-liter, air-cooled, flat-six engine, dating back to one of the original Mezger engine designs. The RSR engine is mated to a five-speed manual with a 4.43 final-drive ratio. As far as iconic Porsche boxer engines go, this one is one of the greatest, and it allowed the 911 RSR to be one of the fastest cars of its day. This faithfully executed replica is no exception. The engine is a 901shop 3.0-liter unit with two spark plugs per cylinder and a 12:1 compression ratio.
Performance Specifications | 1970 Porsche 911 RSR 2.8 Homage |
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Engine | 3.0-liter, naturally-aspirated flat-6 |
Transmission | 5-speed manual |
Drivetrain | Rear engine, RWD |
0-60 MPH | 5.6 seconds |
Top Speed | 168 mph |
Curb weight | 2,069 lbs (with half tank of gas) |
Although not an original RSR, this classic Porsche 911 is a fully-fledged race car. Before the original RSR came to e, competition variants of the Porsche 911 were based on the regular, road-going variants, a case in point being the 1967 Porsche 911 R, which was a heavily modified variant of the road-going 911.
1970 Porsche 911 RSR 2.8 Equipment and Features
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Porsche 30 Turbo brakes
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Whale tail (mounted) and duck bill
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Motec dashboard + analog gauges
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Hours gauge
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Two sets of gears (one Daytona set)
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Smarty cam
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Cool suit system
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Motorolla radio system with 2 headphone and charger sets
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Lexan side windows
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3 sets of BBS wheels (1 set gold, 2 sets silver)
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2 sets of used Hoosier tires (with very few heat cycles)
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1 set of New Hoosiers (unmounted with stickers)
Racing a faithfully executed tribute so the original 911 RSR cars can be preserved
Original 1973 Porsche 911 Carrera RSR are few and far in-between. They rarely come up for sale and when they do, prices are usually astronomical. We managed to find a very clean 911 Carrera RSR example listed on Elfersport, listed for the equivalent of nearly $2.0 million. Moreover, parts for these cars are hard to come by, which means a lot of stuff needs to be fabricated or custom-made. A faithfully executed replica of the original RSR is only a fraction of the price, in this case, $140,000, and you don’t have to sacrifice the originality of an original 911 Carrera RSR when you, eventually, break something.
Dimitar Angelov
Dim has been an automotive journalist since 2014. Although he is interested in all things automotive, his main interests revolve around, Asian, classic, and sports cars. He is particularly fond of Porsche sports cars as well as JDM classics from Toyota, Nissan, Honda, and others. Dim operates mainly from Bulgaria, but can, occasionally, be seen attending Europe's most reputable Auto shows, and events. Read full bio