PORSCHE RACING HISTORY911
1966 1967 1968 1969 1970 1971 1973 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990
1983
6 February 1983 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 52 | Porsche 911 | GTU | Tom Cripe (USA)/Dick Gauthier (USA)/David Duncan (USA) | TFC Racing | 32nd | 8th | 76th | 312 laps | |
| 78 | Porsche 911 | 911 030 0568 | GTU | Klaus Bitterauf (USA)/Vicki Smith (USA)/Scott Flanders (USA) | Der Klaus Haus | 35th | 11th | 75th | 299 laps - Engine |
| 16 | Porsche 911 | GTU | Paul Goral (USA)/Larry Figaro (USA)/Nort Northam (USA) | Paul Goral (USA) | 48th | 13th | 80th | 161 laps - Engine |
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 11 | Porsche 911 | GTU | Paul Goral (USA)/Larry Figaro (USA)/Peter Uria (USA) | Paul Goral (USA) | 19th | 7th | 70th | 202 laps | |
| 68 | Porsche 911 | GTU | Jack Rynerson (USA)/Van McDonald (USA)/Chris Wilder (USA) | Jack Rynerson | 27th | 10th | 49th | 183 laps | |
| 93 | Porsche 911 | GTU | John Higgins (USA)/James King (USA)/Chip Mead (USA) | Foreign Exchange (USA) | 31st | 12th | 59th | 175 laps - Engine | |
| 04 | Porsche 911 | GTU | Vince DiLella (USA)/Manuel Cueto (USA) | Di Lella Racing (USA) | 42nd | 18th | 72nd | 152 laps | |
| 87 | Porsche 911 | GTU | Robert Gottfried (USA)/Tom Turner (USA)/Donald Flores (USA) | Don Flores | 51st | 20th | 77th | 131 laps | |
| 52 | Porsche 911 | GTU | Dick Gauthier (USA)/Tom Cripe (USA)/Ron Collins (USA)/Bill McVey (USA) | TFC Racing | 65th | 22nd | 68th | 67 laps | |
| 78 | Porsche 911 | 911 030 0568 | GTU | Klaus Bitterauf (USA)/Vicki Smith (USA)/Scott Flanders (USA) | Der Klaus Haus | 68th | 23rd | 64th | 59 laps - Gearbox |
10 April 1983 - Road Atlanta 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 8 | Porsche 911 | GTU | Jack Rynerson (USA)/Chris Wilder (USA) | John Rynerson | 26th | 7th | 36th | 103 laps | |
| 78 | Porsche 911 | 911 030 0568 | GTU | Klaus Bitterauf (USA)/Vicki Smith (USA) | Der Klaus Haus | 36th | 10th | 57th | 87 laps |
24 April 1983 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 08 | Porsche 911 | GTU | Peter Jauker (USA)/Gary Auberlen (USA)/Adrian Gang (USA) | Speedy Porsche Racing | 17th | 6th | 52nd | 160 laps | |
| 70 | Porsche 911 | GTU | Brent Regan (USA)/Larry Chmura (USA)/Jon Koobation (USA) | Brent Regan | 19th | 7th | 53rd | 158 laps |
10 July 1983 - Brainerd 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 13 | Porsche 911 | GTU | J. Robert Johnson (USA)/George Wilkie (USA) | Autoworks | 21st | 6th | 22nd | 51 laps - DNF |
24 July 1983 - Sears Point 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 8 | Porsche 911 | 453360 | GTU | John Johnson (USA)/Walt Maas (USA) | John Johnson (USA) | 13th | 4th | 22nd | 95 laps |
| 70 | Porsche 911 | GTU | Brent Regan (USA)/Larry Chmura (USA) | 14th | 5th | 25th | 95 laps | ||
| 81 | Porsche 911 | GTU | Gary Nylander (USA)/Don Bell (USA) | 17th | 7th | 26th | 93 laps | ||
| 08 | Porsche 911 | GTU | Gary Auberlen (USA)/Peter Jauker (USA) | 18th | 8th | 30th | 89 laps | ||
| 51 | Porsche 911 | GTU | Nick Feodorhoff (USA)/Bernie Neumann (CDN) | Performance Unlimited (USA) | 19th | 9th | 31st | 78 laps |
31 July 1983 - Portland 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 911 | GTU | Nick Feodorhoff (USA)/Bernie Neumann (CDN) | Performance Unlimited (USA) | 16th | 8th | 36th | 127 laps | |
| 81 | Porsche 911 | GTU | Gary Nylander (USA)/Don Bell (USA) | Apex Systems | 26th | 11th | 32nd | 69 laps - DNF |
14 August 1983 - Mosport 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 83 | Porsche 911 | GTU | Fritz Hochreuter (CDN)/Rainer Brezinka (CDN) | R & H Racing (CDN) | 21st | 8th | 20th | 109 laps |
21 August 1983 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 2 | Porsche 911 | GTU | Mark Altman (USA)/Gary Altman (USA) | Altman Bros Motor Racing (USA) | 24th | 10th | 42nd | 90 laps - DNF | |
| 13 | Porsche 911 | GTU | J. Robert Johnson (USA)/George Wilkie (USA) | Autoworks | 28th | 12th | 34th | 80 laps - DNF |
11 September 1983 - Pocono 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 42 | Porsche 911 | GTU | Gary Altman (USA)/Mark Altman (USA) | Altman Bros Motor Racing (USA) | 33rd | 12th | 33rd | 66 laps - DNF |
27 November 1983 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 69 | Porsche 911 | GTU | John Hofstra (USA)/George Shafer (USA) | 33rd | 11th | 66th | 74 laps | ||
| 68 | Porsche 911 | GTU | Jack Rynerson (USA)/Chris Wilder (USA) | Jack Rynerson | 40th | 14th | 53rd | 70 laps | |
| 03 | Porsche 911 | GTU | Gary Brown (USA)/Sam Flippo | 48th | 18th | 64th | 56 laps - DNF |