PORSCHE RACING HISTORY911 T
1983
6 February 1983 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 911 T | 1290486 | GTU | Jack Rynerson (USA)/Ron Case (USA) | Case Racing | 68th | 18th | 74th | 67 laps - Engine |
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 911 T | 1290486 | GTU | Ron Case (USA)/Craig Case (USA)/Dave Panaccione (USA) | Case Racing | 32nd | 13th | 67th | 173 laps |
21 August 1983 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 30 | Porsche 911 T | 1290486 | GTU | Ron Case (USA)/Jack Rynerson (USA) | Dr. Ronald Case | 29th | 13th | 48th | 77 laps |
27 November 1983 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 00 | Porsche 911 T | 1290486 | GTU | Ron Case (USA)/Craig Case (USA) | Case Racing | 47th | 17th | 65th | 58 laps |