1976 Porsche 934/5
In 1967 Porsche prepared a small number of 934 Porsches with 935 Group 5 parts for the Trans-Am and IMSA GTO series. In the end, the 934/5 dominated the Trans-Am series by taking to top five positions in the championship.
Ludwig Heimrath became the 1977 Trans-Am champion in his 934/5 by protesting Peter Gregg’s highly modified car. Together they humbled the Corvette C3s and the Group 44 Jaguar XJS. Later
Meanwhile in the IMSA-sanctioned 1977 Camel GT Challenge, Hurley Haywood placed second at the end of the season in the Bob Hagestad 934/5 as prepared by Franz Blam Racing. They were beaten by the DeKon Monza of Al Holbert.
Customers of the factory 934/5s included Jim Busby, Peter Gregg, The Interscope Team, George Dyer, Vasak Polak, Ciro Nappi, Bob Hagestad, Ludwig Heimrath, Dick Barbour and Clifford Kearns.
All the 934s were delivered, body-in-white, to several teams with the 935 wheel flares and rear wing. Only ten 934/5s were officially made by Porsche with the chassis numbers 9307700951, 9307700952, 9307700953, 9307700954, 9307700955, 9307700956, 9307700957, 9307700958, 9307700959, 9307700960.
In Detail
| submitted by | Richard Owen |
| type | Racing Car |
| built at | Stutgart, Germany |
| production | 10 |
| engine | Flat 6 |
| position | Rear, Longitudinal |
| aspiration | KKK Turbocharger |
| valvetrain | SOHC |
| fuel feed | K-Jetronic Mechanical Injection |
| displacement | 2993 cc / 182.64 in³ |
| compression | 10.3:1 |
| power | 361.7 kw / 485 bhp @ 7000 rpm |
| specific output | 162.04 bhp per litre |
| torque | 588.4 nm / 434 ft lbs @ 5400 rpm |
| redline | 8500 |
| body / frame | Unit Steel with Some Fiberglass Panels |
| driven wheels | Rear Engine / RWD |
| wheel type | BBS Center-Lock |
| front brakes | 917 Ventilated Discs |
| rear brakes | 917 Ventilated Discs |
| front wheels | F 40.6 x 26.7 cm / 16 x 10.5 in |
| rear wheels | R 40.6 x 31.8 cm / 16 x 12.5 in |
| steering | Rack & Pinion |
| wheelbase | 2271 mm / 89.4 in |
| front track | 1402 mm / 55.2 in |
| rear track | 1422 mm / 56.0 in |
| length | 4128 mm / 162.5 in |
| width | 1651 mm / 65.0 in |
| height | 1321 mm / 52.0 in |
| transmission | 5-Speed Manual |
| tran clutch | Single Plate |
| gear ratios | 3.18:1, 1.83:1, 1.26:1, 0.925:1, 0.724:1 |
| final drive | 4.43:1 |
| top speed | ~286.5 kph / 178.0 mph |
| 0 – 60 mph | ~5.6 seconds |
| 0 – 100 mph | ~12.0 seconds |
| 0 – 1/4 mile | ~13.2 seconds |
| fuel capacity | 120 litres or 31.68 gal. |
Auction Sales History
1976 Porsche 934/5 IMSA/Trans-Am 9307700957 – sold for $550,000 The seventh of 10 factory-built single-turbo racing cars. Originally sold to Bob Hagestad Racing. Driven by IMSA Champion Hurley Haywood. Finished 2nd in 1977 IMSA GT series. Auction Source: 2013 Monterey Auction by RM Auctions
1976 Porsche 934/5 – did not sell for $550,000 From the Steve Goldin Collection. 1 of 10 factory built 934 1/2s built. Designed specifically for IMSA competition. Original owner was Bob Hagestad Racing. Driven by Hurley Haywood. Finished 2nd overall in 1977 IMSA Championship with several wins. Correct Porsche single turbo motor. – Sold on bill of sale
Auction Source: 2012 Daytime Auction by Mecum
