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
1978
5 February 1978 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 76 | Porsche 911 | GTU | Frank Thomas (USA)/Lee Mueller (USA)/Logan Blackburn (USA) | Quality Inn | 48th | 17th | 39th | 224 laps - DNF |
18 March 1978 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 89 | Porsche 911 | GTU | Rusty Bond (USA)/Ren Tilton (USA) | Barrick Motor Racing | 21st | 8th | 39th | 181 laps | |
| 71 | Porsche 911 | GTU | John Higgins (USA)/Tim Cooper (USA)/James King (USA) | Foreign Exchange Racing | 26th | 11th | 35th | 168 laps | |
| 76 | Porsche 911 | GTU | Frank Thomas (USA)/Lee Mueller (USA)/Paul May (USA) | Quality Inn | 60th | 24th | 22nd | 43 laps - Engine | |
| 45 | Porsche 911 | GTU | Gary Steele (USA)/Jim Gaeta (USA)/Bob Zulkowski (USA) | Vann's Auto Body | 63rd | 26th | 45th | 28 laps - Engine |
2 April 1978 - Talladega 6 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 76 | Porsche 911 | GTU | Lee Mueller (USA)/Frank Thomas (USA) | Quality Inn | 7th | 1st | 18th | 156 laps | |
| 45 | Porsche 911 | GTU | Jim Gaeta (USA)/Gary Steele (USA) | Vann's Auto Body | 28th | 8th | 36th | 109 laps | |
| 51 | Porsche 911 | GTU | John Hotchkis (USA)/Dennis Aase (USA) | Wynn's International | 37th | 12th | 24th | 29 laps - Accident |
29 May 1978 - Lime Rock 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 60 | Porsche 911 | GTO | Ren Tilton (USA) | 16th | 6th | 20th | 57 laps | ||
| 27 | Porsche 911 | GTO | Tom Sheehy (USA) | 21st | 7th | 25th | 55 laps |
11 June 1978 - Trans-Am Portland - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 911 | TA-I | Nick Feodorhoff (USA) | Performance Unlimited (USA) | 27th | 18th | 38th | 19 laps - Accident |
4 July 1978 - Daytona 250 Miles Paul Revere - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 911 | GTU | Fred Snow (USA)/Jack Swanson (USA)/Tom Cripe (USA) | 49th | 17th | 53rd | 11 laps - DNF |
30 July 1978 - Sears Point 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 60 | Porsche 911 | GTO | Ren Tilton (USA) | 12th | 4th | 23rd | 36 laps |
6 August 1978 - Portland 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 60 | Porsche 911 | GTO | Ren Tilton (USA) | 10th | 3rd | 22nd | 45 laps |
27 August 1978 - Mid Ohio 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 76 | Porsche 911 | GTU | Frank Thomas (USA)/Lee Mueller (USA) | Quality Inn | 39th | 13th | 37th | 37 laps - DNF |
3 September 1978 - Vallelunga 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 16 | Porsche 911 | GT | Gérard Bleynie (F)/Claude Ballot-Léna (F) | DNF | 22nd | 8 laps - Ignition |
4 September 1978 - Road Atlanta 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 60 | Porsche 911 | GTO | Ren Tilton (USA) | R & R Racing | 21st | 11th | 28th | 33 laps |
8 October 1978 - Trans-Am Laguna Seca - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 26 | Porsche 911 | TA-II | Tom Masterson (USA) | Swag Engineering (USA) | 29th | 11th | 36th | 35 laps |
5 November 1978 - Trans-Am Mexico - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 26 | Porsche 911 | TA-II | Tom Masterson (USA) | Swag Engineering (USA) | 19th | 10th | 23rd | 26 laps |
26 November 1978 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 75 | Porsche 911 | GTU | Mike Ramirez (PR)/Manuel Villa (PR) | Mike Ramirez | 31st | 6th | 64th | 55 laps | |
| 33 | Porsche 911 | GTU | Richard Aten (USA)/Peter Welter (USA) | Peter Welter | 41st | 9th | 66th | 35 laps |