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P.O. Box 7039, Halstead, Essex, CO9 2WL
Telephone: 00 44 (0)1787 477749, Email: enquiries@maxted-page.com
1974 PORSCHE.3.0 IROC CARRERA RSR - M491
Chassis #911 460 0042
Engine #Type 911/74 - 684 0025
One of only fifteen cars specially built by Porsche in 1973 for the inaugural 1973-1974 IROC, International Race of Champions series at Riverside, USA. A one-make race series conceived by Roger Penske, in which twelve championship title-winning drivers from the various top areas of motorsport, including Formula One, SCCA, Indycar and Nascar, competed together by being allocated to race an identically prepared car in each round of the series, ultimately for $175,000 prize money.
Bright Green Chassis # 911 460 0042 – was raced at Riverside three times during 1973 in the three elimination rounds by Richard Petty, A.J Foyt and Denny Hulme
IROC Series Races - Chassis # 911 460 0042
1973
| Date | Race / Driver | No | Result |
| 27/10 | Riverside - Race 1: Richard Petty | 10 | 7th |
| 27/10 | Riverside - Race 2: A. J. Foyt | 6 | 5th |
| 28/10 | Riverside - Race 3: Denny Hulme | 8 | 8th |
1974
| Date | Race / Driver |
| 14/02 | Daytona: - Did not race. (Only six of the fifteen IROC RSRs built were entered for this Final round of the series) |
IROC RSR (M491) - Specification
Engine, Transmission & Suspension
- 3.0-litre MFI Type 911/74 engine
- 95 mm bore x 70.4 mm stroke, 10.3:1 compression
- 316 hp @ 8,000 rpm / 310 Nm (229 lb-ft) @ 6,100 rpm
- Six individual high-butterfly throttle bodies
- Twin-plug ignition
- 110-litre plastic fuel tank
- 5-speed gearbox with oil pump
- Limited-slip differential (80% lock)
- Four-piston 917 brake calipers with cross-drilled discs
- Dual master brake cylinders
- Bilstein Shocks
- 9J and 11J x 15 Fuchs alloy wheels
- Goodyear radial racing tyres
Bodywork
- Steel front and rear RSR flared wheel arches
- Welded chassis reinforcements
- Rear shock tower reinforcements
- Front fiberglass RSR bumper with centre oil cooler
- Rear fiberglass RSR bumper
- Fiberglass whale tail
- Fiberglass front hood
- Plexiglass windows
- Windshield clips and rear window straps
- Rear blanking plate instead of Porsche reflector
- Black headlight rings, cover and driver’s side door mirror
- Three-spoke Sport steering wheel
- Lightweight Recaro racing seats
- Lightweight door panels with release strap
- Black headliner and needle felt carpets
- No sound deadening
- Clock and radio blanking plates
- 10,000 rpm tachometer
- Rear roll hoop
- Racing seat harness
- Red Heinzmann fire extinguisher system
Interior
Safety
After the 1973-74 IROC series, all sixteen cars were then individually sold by Penske to privateer racing drivers and buyers:-
Ownership provenance - # 911 460 0042
1974
Sold to Don Wester (Monterey, California, USA).
Sold to: Werner Schoch (California, USA - Porsche dealer).
1989-90
For sale with J.B. Racing (Salmaise, France).
1991
Sold to Franz Halder (Austria).
1997
For sale with Dr George Konradsheim (Austria) - Co-author of the definitive book: 2.7 Carrera RS.
1997
Sold to Bruce Perrone (USA) – with 10,000 Kms and original engine installed.
1997
Sold to Jim Hartman (Pennsylvania, USA) - Hartman prepared and raced the car frequently on the East coast from 1997 to 2006, installing a built-up race engine, keeping the original unused.
In preparation to sell the car he reinstalled the original motor and repainted the car, except for the roof.
2006
Sold to Joe Hayes (Chicago, USA). – Road registered with US title. Driven on several vintage rallies.
2013
Sold to Chris Wilson (Australia).
2013
Sold via Maxted-Page Ltd to UK based collector.
2016
FOR SALE Maxted-Page Ltd.
We are delighted to have the opportunity to offer for sale this well-documented example which has been consistently well maintained and is still equipped with its correctly numbered Type 911/74 3.0-litre high-butterfly injection (315bhp) engine.
Recently inspected and fully authenticated by Jürgen Barth, #911 460 0042 has excellent provenance, comprehensive history files and comes with current UK registration / V5 title documentation with all EU taxes paid.
This very special group of just 15 factory-prepared IROC RSRs occupy a unique position in Porsche racing history and remain as enjoyable as ever today either to drive on the road and/or to race at the most highly regarded historic events around the world.
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