PORSCHE RACING HISTORYM. L. Speer (USA)
1980
3 February 1980 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 08 | Porsche 911 SC | 911 030 1263 | GTU | M. L. Speer (USA)/Ray Ratcliff (USA)/Terry Wolters (USA) | Moran Construction | 18th | 6th | 57th | 489 laps |
22 March 1980 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 08 | Porsche 911 SC | 911 030 1263 | GTU | Ray Ratcliff (USA)/M. L. Speer (USA)/Terry Wolters (USA) | Moran Construction | 35th | 12th | 68th | 161 laps - DNF |
27 April 1980 - Riverside 5 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 49 | Porsche 911 Carrera RSR | 12803002 | GTO | Bob Copeman (USA)/M. L. Speer (USA) | Tortilla Flats Racing (USA) | 20th | 8th | 52nd | 138 laps |
30 November 1980 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 08 | Porsche 911 SC | 911 030 1263 | GTU | M. L. Speer (USA)/Ray Ratcliff (USA) | Moran Construction | 22nd | 6th | 65th | 55 laps |