PORSCHE RACING HISTORYKarl Durkheimer (USA)
1987 : Sebring 12 Hours - 2nd in class
1 February 1987 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 54 | Porsche 911 Carrera | 911 210 0224 | GTU | Bill Auberlen (USA)/Karl Durkheimer (USA)/Dieter Oest (USA) | SP Racing (USA) | 64th | 11th | 50th | 87 laps - Engine |
21 March 1987 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 54 | Porsche 911 Carrera | 911 210 0224 | GTU | Gary Auberlen (USA)/Bill Auberlen (USA)/Karl Durkheimer (USA) | SP Racing (USA) | 18th | 2nd | 54th | 244 laps |
7 June 1987 - Mid-Ohio 250 km IMSA GTO - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 56 | Porsche 911 Carrera | GTU | Karl Durkheimer (USA) | Karl Durkheimer (USA) | 13th | 4th | 15th | 62 laps |
16 August 1987 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 56 | Porsche 911 Carrera | GTU | Karl Durkheimer (USA)/Jim Torres (USA) | Escort Racing (USA) | 26th | 4th | 46th | 66 laps |
4 October 1987 - Columbus IMSA GT - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 56 | Porsche 911 Carrera | GTU | Karl Durkheimer (USA) | Escort Racing (USA) | 18th | 4th | 25th | 25 laps |