PORSCHE RACING HISTORY1983 - GP Miami IMSA GTO
27 February 1983 - Miami Grand Prix Street Circuit, USA
Ludwig Heimrath second in a Porsche 935, 16.487s behind the winning Chevrolet Camaro driven by Gene Felton
Overall - 2nd : GTO - 2nd
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 07 | Porsche 935 | 930 770 0958 | GTO | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 2nd | 2nd | 4th | 34 laps |
| 89 | Porsche 911 Carrera RSR | GTO | " Jamsal" (ES) | Team Scorpio Racing (ES) | 4th | 4th | 18th | 33 laps | |
| 50 | Porsche 911 Carrera RSR | GTO | Kikos Fonseca (CR) | Diego Febles Racing | 5th | 5th | 9th | 33 laps | |
| 04 | Porsche 911 Carrera RSR | 911 360 0610 | GTO | Ernesto Soto (YV) | T&R Racing (USA) | 6th | 6th | 25th | 33 laps |
| 15 | Porsche 911 Carrera RSR | 911 460 0037 | GTO | Doug Lutz (USA) | DL Performance Eng. (USA) | 7th | 7th | 17th | 33 laps |
| 91 | Porsche 934 | 930 890 0014 | GTO | Chester Vincentz (USA) | Electrodyne (USA) | 12th | 12th | 19th | 32 laps |
| 34 | Porsche 924 Carrera GTR | GTO | George Drolsom (USA) | Drolsom Racing (USA) | 19th | 19th | 24th | 24 laps - DNF | |
| 79 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720006 | GTO | Tom Winters (USA) | Whitehall Promotions (USA) | 20th | 20th | 19th | 16 laps - DNF |
| 69 | Porsche 911 Carrera RSR | GTO | Gustavo Londono (CO) | Londono Bridge Racing (CO) | 22nd | 22nd | 21st | 15 laps - DNF | |
| 72 | Porsche 911 Carrera | GTO | George Hulse (USA) | The Foreign Car Repr. (USA) | 23rd | 23rd | 26th | 15 laps - DNF | |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA) | Personalized Autohaus (USA) | 25th | 25th | 5th | 9 laps - Accident |
IMSA - International Motor Sport Association
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