PORSCHE RACING HISTORY935/81
1983
27 February 1983 - Miami GP - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 935/81 | JR-002 | GTP | Jochen Mass (B) | John Fitzpatrick Racing (GB) | 8th | 8th | 8th | 27 laps |
| 30 | Porsche 935/81 | JR-001 | GTP | Gianpiero Moretti (I) | Momo Corse (I) | 26th | 26th | 13th | 17 laps - DNF |
10 April 1983 - Road Atlanta 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 0 | Porsche 935/81 | JR-001 | GTP | Gianpiero Moretti (I)/Sarel van der Merwe (ZA) | Momo Corse (I) | 3rd | 3rd | 11th | 122 laps |
24 April 1983 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 46 | Porsche 935/81 | JR-001 | GTP | Bob Wollek (F)/Mauricio DeNarváez (COL) | DeNarvaez Enterprises (CO) | 3rd | 3rd | 5th | 192 laps |
| 12 | Porsche 935/81 | JR-002 | GTP | Derek Bell (GB)/Rolf Stommelen (D) | John Fitzpatrick (GB) | 32nd | 10th | 2nd | 94 laps - Fatal Accident |
19 June 1983 - Mid-Ohio 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 935/81 | JR-001 | GTP | Sarel van der Merwe (ZA)/Gianpiero Moretti (I) | Momo Corse (I) | 6th | 3rd | 7th | 196 laps |
24 July 1983 - Sears Point 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 935/81 | JR-001 | GTP | Sarel van der Merwe (ZA)/Gianpiero Moretti (I) | Momo Corse (I) | 7th | 5th | 7th | 100 laps |
31 July 1983 - Portland 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 935/81 | JR-001 | GTP | Gianpiero Moretti (I)/Sarel van der Merwe (ZA) | Momo/Kreepy Krauly (I) | 22nd | 6th | 8th | 96 laps - DNF |
11 September 1983 - Pocono 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 935/81 | JR-001 | GTP | Sarel van der Merwe (ZA)/Gianpiero Moretti (I) | Momo/Kreepy Krauly (I) | 2nd | 2nd | 7th | 176 laps |