PORSCHE RACING HISTORYChassis No. 304 823
1 February 1970 - Daytona 24 Hours - International Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 76 | Porsche 911 S | 304 823 | GT2.0 | Scotty Addison (USA)/Erhard Dahm (USA) | Scotty Addison (USA) | 24th | 4th | 24th | 462 laps |
6 February 1977 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 27 | Porsche 911 S | 304 823 | GTU | Ray Mummery (USA)/Jack Refenning (USA)/Ralph Noseda (USA) | SVD Automotive | 12th | 5th | 51st | 581 laps |
19 March 1977 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 27 | Porsche 911 S | 304 823 | GTU | Ray Mummery (USA)/Jack Refenning (USA)/Joseph Hamilton (USA) | Miami Auto Racing | 9th | 2nd | 70th | 203 laps |