PORSCHE RACING HISTORY1983 - Road America 500 Miles
21 August 1983 - Road America, USA
Highest placed Porsche was a Porsche 914/6 driven by Tim Selby and Earl Roe, which was 14th overall and 5th in GTU class
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 914/6 | 914 043 0538 | GTU | Tim Selby (USA)/Earl Roe (USA) | Roe/Selby Racing (USA) | 14th | 5th | 32nd | 101 laps |
| 34 | Porsche 924 Carrera GTR | GTU | George Drolsom (USA)/Deborah Gregg (USA) | Drolsom Racing (USA) | 17th | 6th | 30th | 99 laps | |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA)/Kees Nierop (CDN) | Wayne Baker Racing (USA) | 18th | 5th | 9th | 98 laps |
| 96 | Porsche 911 Carrera RSR | GTO | Phil Byrd (USA)/Richard Silver (USA) | Weld Fixturing (USA) | 22nd | 6th | 40th | 93 laps | |
| 2 | Porsche 911 | GTU | Mark Altman (USA)/Gary Altman (USA) | Altman Bros Motor Racing (USA) | 24th | 10th | 42nd | 90 laps - DNF | |
| 3 | Porsche 914/6 | 473 29 02456 | GTU | Richard Graves (USA)/Alice Graves (USA) | Richard Graves | 25th | 11th | 43rd | 87 laps |
| 64 | Porsche 911 Carrera RSR | GTO | John Hulen (USA)/Ron Coupland (USA) | John Hulen (USA) | 26th | 8th | 35th | 86 laps | |
| 13 | Porsche 911 | GTU | J. Robert Johnson (USA)/George Wilkie (USA) | Autoworks | 28th | 12th | 34th | 80 laps - DNF | |
| 30 | Porsche 911 T | 1290486 | GTU | Ron Case (USA)/Jack Rynerson (USA) | Dr. Ronald Case | 29th | 13th | 48th | 77 laps |
| 35 | Porsche 911 Carrera | GTO | Jack Griffin (USA)/Bobby Hefner (USA) | G & H Development | 31st | 11th | 29th | 73 laps | |
| 1 | Porsche 935 L | 935 L | GTP | John Paul, Jr. (USA)/Preston Henn (USA) | Henn's Swap Shop Racing (USA) | 33rd | 8th | 3rd | 63 laps - DNF |
| 56 | Porsche 934 | 930 670 0162 | GTO | Rick Borlase (USA)/Werner Frank (USA) | Rick Borlase (USA) | 36th | 12th | 44th | 53 laps - DNF |
| 5 | Porsche 935 K3/80 | 000 00013 | GTP | Bob Akin (USA) | Bob Akin Motor Racing (USA) | 42nd | 11th | 15th | 25 laps - DNF |
| 24 | Porsche 935 JLP-2 | 009 00043 | GTP | Ken Madren (USA) | Pegasus III Racing (USA) | 48th | 13th | 21st | 5 laps - DNF |
IMSA - International Motor Sport Association
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