PORSCHE RACING HISTORY1983 - Road Atlanta 500 km
10 April 1983 - Road Atlanta Circuit, USA
Gianpiero Moretti & Sarel van der Merwe 3rd in a Porsche 935/78-81, 2 laps behind the winning Jaguar XJR-5 driven by Bob Tullius and Bill Adam
Overall - 3rd : GTP - 3rd : GTO - 1st
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 0 | Porsche 935/81 | JR-001 | GTP | Gianpiero Moretti (I)/Sarel van der Merwe (ZA) | Momo Corse (I) | 3rd | 3rd | 11th | 122 laps |
| 1 | Porsche 935 JLP-4 | JLP-4 | GTP | John Paul, Jr. (USA)/Rene Rodriguez (USA) | JLP Racing (USA) | 6th | 6th | 6th | 119 laps |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA) | Personalized Autohaus (USA) | 8th | 1st | 28th | 117 laps |
| 50 | Porsche 911 Carrera RSR | GTO | Kikos Fonseca (CR) | Latino Racing | 14th | 5th | 47th | 113 laps | |
| 05 | Porsche 935 M16 | 930 990 0032 | GTP | Tico Almeida (USA)/Ernesto Soto (YV) | T & R Racing (USA) | 18th | 9th | 15th | 111 laps |
| 58 | Porsche 924 Carrera GTR | GTU | Deborah Gregg (USA)/Kathy Rude (USA) | Brumos Racing (USA) | 20th | 4th | 21st | 110 laps | |
| 34 | Porsche 924 Carrera GTR | GTU | George Drolsom (USA)/Bill Johnson (USA) | Drolsom Racing (USA) | 24th | 6th | 53rd | 105 laps | |
| 24 | Porsche 935 JLP-2 | 009 00043 | GTP | M. L. Speer (USA)/Ken Madren (USA) | Pegasus III Racing (USA) | 25th | 10th | 14th | 104 laps |
| 8 | Porsche 911 | GTU | Jack Rynerson (USA)/Chris Wilder (USA) | John Rynerson | 26th | 7th | 36th | 103 laps | |
| 35 | Porsche 911 Carrera RSR | 911 460 9113 | GTO | Al Leon (USA)/Wayne Pickering (USA) | Pegasus Racing | 31st | 13th | 49th | 93 laps |
| 78 | Porsche 911 | 911 030 0568 | GTU | Klaus Bitterauf (USA)/Vicki Smith (USA) | Der Klaus Haus | 36th | 10th | 57th | 87 laps |
| 14 | Porsche 914/6 | 914 043 1523 | GTU | Bruce Jones (USA)/Fred Apgar (USA) | Bruce Jones Racing | 38th | 12th | 34th | 83 laps |
| 87 | Porsche 911 Carrera RSR | 911 460 0035 | GTO | Jack Lewis (USA)/Bob Beasley (USA) | Bob Beasley | 41st | 16th | 55th | 70 laps - DNF |
| 5 | Porsche 935 K3/80 | 000 00013 | GTP | Bob Akin (USA)/Dale Whittington (USA) | Bob Akin Motor Racing (USA) | 43rd | 12th | 4th | 65 laps - DNF |
| 72 | Porsche 911 Carrera | GTO | George Hulse (USA)/Craig Hogan (USA) | THR (USA) | 50th | 18th | 58th | 43 laps | |
| 64 | Porsche 911 Carrera RSR | GTO | Ron Coupland (USA) | John Hulen (USA) | 51st | 19th | 51st | 35 laps - DNF | |
| 07 | Porsche 934 | 930 770 0958 | GTO | Ludwig Heimrath, Sr (CDN) | Heimrath Racing (CDN) | 56th | 21st | 35th | 16 laps - Flat Tyre/Suspension |
| 91 | Porsche 934 | 930 890 0014 | GTO | Chester Vincentz (USA) | Electrodyne (USA) | 57th | 22nd | 45th | 15 laps - Accident |
IMSA - International Motor Sport Association
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