PORSCHE RACING HISTORYPorsche 934 - Chassis No. 930 770 0958
Eighth customer delivery of only 10 examples of the 934/5 Built; Originally Delivered to Ludwig Heimrath later converted to full 935 spec 1977 - Ludwig Heimrath, Canada, purchased new via Porsche Motorsport. 1978 - Converted to 935 spec ? - Rivard Compétition, Canada c1995 - Andre Gaudet, Québec, Canada 2006 - ? 2022 - Sold at Pebble Beach Auction for $885,000 (Estimate $850,000 - $1,000,000)
30 May 1977 - Trans-Am Kent - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 1st | 1st | 5th | 44 laps |
12 June 1977 - Trans-Am Portland - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 6th | 4th | 4th | 48 laps |
26 June 1977 - Trans-Am Nelson Ledges - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 2nd | 2nd | 3rd | 50 laps |
9 July 1977 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | Gr.5 | Ludwig Heimrath, Sr (CDN)/Paul Miller (USA) | Heimrath Racing (CDN) | 8th | 8th | 9th | 160 laps |
31 July 1977 - Trans-Am Hallett - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 2nd | 2nd | 5th | 54 laps |
14 August 1977 - Trans-Am Brainerd - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 2nd | 2nd | 6th | 33 laps |
20 August 1977 - Mosport 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN)/Paul Miller (USA) | Heimrath Racing (CDN) | 1st | 1st | 5th | 240 laps |
3 September 1977 - Trans-Am Road America - Race I - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 1st | 1st | 2nd | 20 laps |
4 September 1977 - Trans-Am Road America - Race 2 - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 19th | 7th | 1st | 18 laps |
9 November 1977 - Trans-Am Mont-Tremblant - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 934/5 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 2nd | 2nd | 13th | 38 laps |
5 February 1978 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/Jacques Bienvenue (CDN)/Norm Ridgely (CDN) | Heimrath Racing (CDN) | 35th | 13th | 11th | 466 laps - Accident |
18 March 1978 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/Norm Ridgely (CDN) | Heimrath Racing (CDN) | 73rd | 22nd | 71st | 6 laps - Engine |
4 June 1978 - Trans-Am Westwood - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 1st | 1st | 2nd | 56 laps |
11 June 1978 - Trans-Am Portland - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 2nd | 2nd | 5th | 49 laps |
25 June 1978 - Trans-Am Mont-Tremblant - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 2nd | 2nd | 3rd | 38 laps |
8 July 1978 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | Gr.5 | Ludwig Heimrath, Sr (CDN)/Paul Miller (USA) | Heimrath Racing (CDN) | 15th | 8th | 12th | 119 laps |
19 August 1978 - Trans-Am Mosport - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing Services (CDN) | 2nd | 2nd | 1st | 40 laps |
8 October 1978 - Trans-Am Laguna Seca - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 3rd | 3rd | 5th | 51 laps |
5 November 1978 - Trans-Am Mexico - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 1st | 1st | 3rd | 31 laps |
26 November 1978 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/Carlos Moran (ES) | Heimrath Racing (CDN) | 5th | 5th | 4th | 63 laps |
17 March 1979 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/" Jamsal" (ES)/Carlos Moran (ES) | Heimrath Racing (CDN) | 65th | 18th | 8th | 17 laps - DNF |
3 June 1979 - Trans-Am Westwood - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Ludwig Heimrath (CDN) | 2nd | 2nd | 2nd | 55 laps |
17 June 1979 - Brainerd 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 77 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN) | Ludwig Heimrath (CDN) | 31st | 15th | 9th | 20 laps |
7 July 1979 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | Gr.5 | Ludwig Heimrath, Sr (CDN)/Carlos Moran (ES) | Heimrath Racing (CDN) | 24th | 10th | 11th | 117 laps - Engine |
21 July 1979 - Trans-Am Road America - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Ludwig Heimrath (CDN) | 2nd | 2nd | 3rd | 25 laps |
5 August 1979 - Trans-Am Watkins Glen - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | TA-II | Ludwig Heimrath, Sr (CDN) | Ludwig Heimrath (CDN) | 5th | 4th | 2nd | 29 laps |
2 September 1979 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/Brett Lunger (USA) | Ludwig Heimrath (CDN) | 38th | 10th | 3rd | 28 laps - DNF |
3 February 1980 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/Carlos Moran (ES)/Johnny Rutherford (USA) | Heimrath Racing (CDN) | 66th | 23rd | 6th | 24 laps - Engine |
22 March 1980 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/Johnny Rutherford (USA)/Carlos Moran (ES) | Ludwig Heimrath (CDN) | 8th | 7th | 9th | 224 laps |
13 April 1980 - Road Atlanta 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN) | Ludwig Heimrath (CDN) | 27th | 15th | 33rd | 15 laps |
26 May 1980 - Lime Rock 1.5 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 6th | 3rd | 6th | 85 laps |
5 July 1980 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | Gr.5 | Ludwig Heimrath, Sr (CDN)/Johnny Rutherford (USA) | Heimrath Racing (CDN) | 11th | 11th | 13th | 122 laps |
17 August 1980 - Mosport 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/Johnny Rutherford (USA) | Heimrath Racing (CDN) | 21st | 12th | 8th | 127 laps - Suspension |
31 August 1980 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 47th | 15th | 10th | 10 laps - DNF |
21 September 1980 - Road Atlanta 50 Miles - Heat 1 - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Jr (CDN) | Heimrath Racing (CDN) | 24th | 13th | 12th | 10 laps - DNF |
30 November 1980 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 59th | 15th | 10th | 8 laps - DNF |
1 February 1981 - Daytona 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/Ludwig Heimrath, Jr (CDN) | Heimrath Racing (CDN) | 14th | 5th | 17th | 575 laps |
21 March 1981 - Sebring 12 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/Ludwig Heimrath, Jr (CDN) | Heimrath Porsche (CDN) | 62nd | 21st | 11th | 57 laps - Accident |
12 July 1981 - Watkins Glen 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | Gr.5 | Ludwig Heimrath, Sr (CDN)/Ludwig Heimrath, Jr (CDN) | Heimrath Racing (CDN) | DNF | 12th | 64 laps - Drive Shaft |
6 February 1983 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 934 | 930 770 0958 | GTO | Ludwig Heimrath, Sr (CDN)/Ludwig Heimrath, Jr (CDN) | Heimrath Racing (CDN) | 67th | 36th | 23rd | 71 laps - Oil Leak |
27 February 1983 - GP Miami IMSA GTO - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTO | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 2nd | 2nd | 4th | 34 laps |
10 April 1983 - Road Atlanta 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 934 | 930 770 0958 | GTO | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 56th | 21st | 35th | 16 laps - Flat Tyre/Suspension |
1 May 1983 - Trans-Am Moroso - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 6th | 21st | 44 laps |
31 July 1983 - Trans-Am Road America - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 7 | Porsche 935 | 930 770 0958 | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 4th | 9th | 25 laps |
14 August 1983 - Mosport 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 934 | 930 770 0958 | GTO | Ludwig Heimrath, Sr (CDN)/Ludwig Heimrath, Jr (CDN) | Heimrath Racing (CDN) | 16th | 5th | 8th | 161 laps |
27 November 1983 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 934 | 930 770 0958 | GTO | Ludwig Heimrath, Sr (CDN)/Ludwig Heimrath, Jr (CDN) | Heimrath Racing (CDN) | 44th | 14th | 15th | 65 laps - DNF |
5 February 1984 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 934 | 930 770 0958 | GTP | Ludwig Heimrath, Sr (CDN)/Ludwig Heimrath, Jr (CDN) | Heimrath Racing (CDN) | 70th | 26th | 22nd | 90 laps - DNF |