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
1985
3 February 1985 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 94 | Porsche 911 | GTU | Skip Winfree (USA)/William Phalf (USA)/Wally Hopkins (USA) | 49th Star Racing | 25th | 4th | 76th | 477 laps | |
| 49 | Porsche 911 | GTU | Albert Naon, Jr. (USA)/Dennis Vitolo (USA)/Fernando Garcia (USA) | Conrad Racing | 35th | 5th | 73rd | 336 laps |
23 March 1985 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 49 | Porsche 911 | GTU | Carlos Munoz (USA)/Louis Lopez (USA)/Herman Galeano (USA) | Conrad Racing | 55th | 12th | 66th | 65 laps - DNF |
14 April 1985 - Road Atlanta 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 35 | Porsche 911 | GTU | Bobby Hefner (USA)/Skip Winfree (USA) | 46th | 11th | 43rd | 20 laps - DNF |
28 April 1985 - Riverside 600 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 51 | Porsche 911 | GTU | John Winthrop (USA)/Tom Alan Marx (USA)/Larry Amberg (USA) | 24th | 5th | 55th | 95 laps - DNF | ||
| 78 | Porsche 911 | GTU | John Higgins (USA)/James King (USA) | 27th | 8th | 53rd | 94 laps | ||
| 26 | Porsche 911 | GTU | Sergio Nardi (USA)/Ted Dann (USA) | 35th | 12th | 57th | 68 laps - DNF | ||
| 54 | Porsche 911 | 911 410 3631 | GTU | Danny Edwards (USA) | 52nd | 18th | 50th | 22 laps - DNF |
8 September 1985 - Pocono 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 31 | Porsche 911 | GTU | Gary Altman (USA)/Mark Altman (USA) | Altman Bros. Motor Racing (USA) | 25th | 8th | 34th | 93 laps |
29 September 1985 - Watkins Glen 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 31 | Porsche 911 | GTU | Gary Altman (USA)/Mark Altman (USA) | Altman Bros. Motor Racing (USA) | 23rd | 5th | 43rd | 75 laps | |
| 39 | Porsche 911 | GTU | John Centeno (CDN)/Jack Burnett (USA) | 43rd | 13th | 47th | 32 laps - DNF |
5 October 1985 - Columbus IMSA GT - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 31 | Porsche 911 | GTU | Mark Altman (USA) | Altman Bros Motor Racing (USA) | 14th | 6th | 25th | 33 laps | |
| 73 | Porsche 911 | GTO | John Higgins (USA) | John Higgins (USA) | 41st | 20th | 23rd | 5 laps - DNF |
1 December 1985 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 35 | Porsche 911 | GTU | Bobby Hefner (USA)/Jack Griffin (USA) | 33rd | 6th | 59th | 73 laps |