| 13.4.1980 | 100 mile Road Atlanta | 0 | 935 K3/80 | Danny Ongais | Interscope Racing | 5th |
| 13.4.1980 | 100 mile Road Atlanta | 00 | 935 K3/80 | Ted Field | Interscope Racing | 14th |
| 13.4.1980 | 100 mile Road Atlanta | 03 | 934 | Werner Frank | Werner Frank | 16th |
| 13.4.1980 | 100 mile Road Atlanta | 05 | 935 K3 | Bob Akin | Racing Associates | DNA |
| 13.4.1980 | 100 mile Road Atlanta | 07 | 935 | Ludwig Heimrath | Ludwig Heimrath | 27th |
| 13.4.1980 | 100 mile Road Atlanta | 09 | 935 K3 | Preston Henn | Preston Henn | 24th |
| 13.4.1980 | DRM Hockenheim Jim Clark | 2 | 935 K3/80 | Axel Plankenhorn | Jägermeister Kremer Racing | 2nd |
| 13.4.1980 | DRM Hockenheim Jim Clark | 3 | 935 K3 | | Porsche Kremer Racing | DNA |
| 13.4.1980 | DRM Hockenheim Jim Clark | 4 | 935 K3 | Jürgen Lässig | Weralit Elora Team | DNF |
| 13.4.1980 | DRM Hockenheim Jim Clark | 5 | 935 K3 | | Porsche Kremer Racing | DNA |
| 13.4.1980 | 100 mile Road Atlanta | 5 | 935 K3 | Bob Akin | Racing Associates | 15th |
| 13.4.1980 | DRM Hockenheim Jim Clark | 6 | 935 J | Rolf Stommelen | Liqui Moly Equipe | DNF |
| 13.4.1980 | 100 mile Road Atlanta | 6 | 935 K3/80 | John Fitzpatrick | Dick Barbour Racing | 30th |
| 13.4.1980 | DRM Hockenheim Jim Clark | 7 | 935 J | Volkert Merl | Liqui Moly Equipe | 3rd |
| 13.4.1980 | DRM Hockenheim Jim Clark | 8 | 935 K3 | | Porsche Kremer Racing | DNA |
| 13.4.1980 | 100 mile Road Atlanta | 15 | 935 | Roy Woods | Racing Associates | DNA |
| 13.4.1980 | DRM Hockenheim Jim Clark | 26 | 911 SC | Peter Bulian | Peter Bulian | ?th |
| 13.4.1980 | 6 h Mugello | 27 | 935 | Salam | Christian Bussi | DNF |
| 13.4.1980 | 6 h Mugello | 29 | 935 RSR | Schiebler / Müller | Valvoline Deutschland | DNF |
| 13.4.1980 | 100 mile Road Atlanta | 30 | 935 J | Gianpiero Moretti | Electrodyne/Moretti | 7th |
| 13.4.1980 | 100 mile Road Atlanta | 32 | 934 | Chester Vincentz | Electrodyne Racing | 29th |
| 13.4.1980 | 6 h Mugello | 32 | 935 | Zorzi / "Victor" / Schön | "Victor" | DNS |
| 13.4.1980 | 100 mile Road Atlanta | 35 | 934 | Mandy Gonzalez | Dyn-A-Tune Racing | 26th |
| 13.4.1980 | 6 h Mugello | 35 | 911 Carrera RSR | Pallavicini / Müller | Angelo Pallavicini | DNA |
| 13.4.1980 | 100 mile Road Atlanta | 38 | 911 Carrera RSR | Bonky Fernandez | Boricua Racing | 18th |
| 13.4.1980 | 6 h Mugello | 39 | 934 | Zbinden / Kofel | Formel Rennsport Club, Zurich | DNA |
| 13.4.1980 | 6 h Mugello | 42 | 908/3 | Barth / Brunn | Siegfried Brunn | DNF |
| 13.4.1980 | 100 mile Road Atlanta | 54 | 911 Carrera RSR | Tony Garcia | Montura Racing | 13th |
| 13.4.1980 | 100 mile Road Atlanta | 55 | 935 | Howard Meister | Meister Homes/Alan Johnson Racing | DNA |
| 13.4.1980 | Road Atlanta [GTU] | 57 | 914/4 | Wayne Baker | Personalized Autohaus | 12th |
| 13.4.1980 | 100 mile Road Atlanta | 59 | 935/79 | Peter Gregg | Brumos Porsche | 3rd |
| 13.4.1980 | Road Atlanta [GTU] | 62 | 911 | Bill Koll | Koll Motor Sports | DNA |
| 13.4.1980 | 100 mile Road Atlanta | 63 | 911 Carrera RSR | Luis Mendez | Mendez Racing | 11th |
| 13.4.1980 | 100 mile Road Atlanta | 64 | 911 Carrera | Earle Moffitt | Earle Moffitt | DNA |
| 13.4.1980 | 100 mile Road Atlanta | 85 | 935 | Bruce Leven | Bruce Leven | 25th |
| 13.4.1980 | Road Atlanta [GTU] | 85 | 914/6 | John Hulen | Ron Coupland | DNA |
| 13.4.1980 | 100 mile Road Atlanta | 86 | 935/77A | Hurley Haywood | Hurley Haywood | 2nd |
| 13.4.1980 | 100 mile Road Atlanta | 89 | 911 Carrera RSR | Ernesto Soto | Hector Huerta Racing | 17th |
| 13.4.1980 | 100 mile Road Atlanta | 93 | 935 K3 | Don Whittington | Whittington Bros. Racing | DNS |
| 13.4.1980 | 100 mile Road Atlanta | 94 | 935 | Dale Whittington | Whittington Bros. Racing | 4th |
| 13.4.1980 | 100 mile Road Atlanta | 95 | 935 K3 | Bill Whittington | Whittington Bros. Racing | 1st |
| 13.4.1980 | DRM Hockenheim Jim Clark | | 911 Carrera RSR | Roger Müller | | DNF |
| 13.4.1980 | DRM Hockenheim Jim Clark | | 911 Carrera RSR | Urs Schweizer | | DNF |
| 26.4.1980 | MN GT Donington | 3 | 911 Carrera RSR | Dudley Wood | Charles Ivey Racing | DNA |
| 26.4.1980 | MN GT Donington | 6 | 934 | Steve Buxton | S.B. Offshore & Marine (Edinburgh) Ltd. | DNA |
| 26.4.1980 | MN GT Donington | 9 | 934 | Paul Edwards | Hassop Motors | DNA |
| 27.4.1980 | 5 h Riverside | 00 | 935/77A | Ongais / Field | Interscope Racing | DNS |
| 27.4.1980 | 5 h Riverside | 03 | 934 | Frank / Schramm | Toyota Village | 12th |
| 27.4.1980 | 5 h Riverside | 06 | 911 Carrera RSR | Fassler / Mullen | Fassler - Mullen Racing | 42nd |
| 27.4.1980 | 5 h Riverside | 09 | 935 K3 | Paul | John Paul Racing | 57th |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 2 | 935 K3/80 | Axel Plankenhorn | Jägermeister Kremer Racing | 13th |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 3 | 935 K3 | | Jägermeister Kremer Racing | DNA |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 4 | 935 K3 | Edgar Dören | Weralit Elora Team | 10th |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 5 | 935 K3 | | Jägermeister Kremer Racing | DNA |
| 27.4.1980 | 5 h Riverside | 5 | 935 K3 | Mendez / Redman | Racing Associates | 7th |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 6 | 935 J | Rolf Stommelen | Liqui Moly Equipe | 8th |
| 27.4.1980 | 5 h Riverside | 6 | 935 K3/80 | Fitzpatrick / Barbour | Dick Barbour Racing | 1st |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 7 | 935 J | Volkert Merl | Liqui Moly Equipe | ?th |
| 27.4.1980 | 5 h Riverside | 9 | 935 K3 | Rahal / Garretson | Dick Barbour Racing | 2nd |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 9 | 935/80 | Bob Wollek | Gelo Racing Team - Georg Loos Werbe KG | 3rd |
| 27.4.1980 | 5 h Riverside | 13 | 935 | Townsend / Jenner | Andial Racing | 6th |
| 27.4.1980 | 5 h Riverside | 14 | 935 | Johnson / Scott | Stanton/Barbour | DNA |
| 27.4.1980 | 1000 km Monza | 15 | 935 RSR | Fischhaber / Walter / Schiebler | Erich Schiebler | 10th |
| 27.4.1980 | 1000 km Monza | 16 | 935 | Böhm / Köhler / Schneider | Paul Mahlke | DNA |
| 27.4.1980 | 5 h Riverside | 19 | 911 | Nardi / Nardi | Nardi Motors | 17th |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 21 | 911 SC | Wolfgang Walter | Yale Stapler Team | DNA |
| 27.4.1980 | 1000 km Monza | 21 | 935/77A | Barth / Pescarolo | Sportwagen | 2nd |
| 27.4.1980 | 5 h Riverside | 22 | 911 Carrera RSR | Bruckmann / Goodell | Volker Bruckmann | 37th |
| 27.4.1980 | 1000 km Monza | 22 | 911 Carrera RSR | Berruto / Pizzato / Licheri | Dei Fiori | DNF |
| 27.4.1980 | 1000 km Monza | 23 | 934 | Rombolotti / Zonca | Sergio Rombolotti | DNA |
| 27.4.1980 | 1000 km Monza | 24 | | Villa / Cazzaniga | Pietro Villa | DNA |
| 27.4.1980 | 5 h Riverside | 24 | 924 | Nunnally / Goodspeed | Group 24 Ltd. | DNS |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 26 | 911 SC | Peter Bulian | Peter Bulian | ?th |
| 27.4.1980 | 5 h Riverside | 27 | 911 SC | Morenfeld / Pontier | Joel Morenfeld | 46th |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 27 | 930 | Matthias Lörper | Norddeutscher Automobilclub e. V. | ?th |
| 27.4.1980 | 5 h Riverside | 28 | 914/6 | Zulkowski | Metal Craft Racing | 39th |
| 27.4.1980 | 5 h Riverside | 30 | 935 J | Moretti / Minter | Electrodyne | 33rd |
| 27.4.1980 | 1000 km Monza | 35 | 908/3 | Brunn / Müller | Siegfried Brunn | 13th |
| 27.4.1980 | 5 h Riverside | 39 | 911 | Barker / LaCava | Gregg La Cava | 22nd |
| 27.4.1980 | 5 h Riverside | 49 | 911 Carrera RSR | Copeman / Speer | Tortilla Flats Racing | 20th |
| 27.4.1980 | 5 h Riverside | 54 | 911 Carrera RSR | Garcia / Herman | Montura Racing | 8th |
| 27.4.1980 | 5 h Riverside | 55 | 935 M16 | Meister / Morton | Andial Racing/Meister Homes | 44th |
| 27.4.1980 | 5 h Riverside | 56 | 911 Carrera | Borlase / Kravig / Hammond | Rick Borlase | 31st |
| 27.4.1980 | 5 h Riverside | 57 | 914/4 | Haas / Smith-Haas / Scott | Personalized Porsche | 26th |
| 27.4.1980 | 5 h Riverside | 62 | 911 | Koll / Cook | Koll Motor Sports | DNS |
| 27.4.1980 | 5 h Riverside | 64 | 911 | Aase | Alan Johnson Racing | 56th |
| 27.4.1980 | 5 h Riverside | 73 | 911 | Demele / Goodspeed | Jerry Demele Racing | 34th |
| 27.4.1980 | 5 h Riverside | 86 | 935/77A | Leven / Haywood | Bayside Disposal | 3rd |
| 27.4.1980 | 5 h Riverside | 86T | 935 | | Bayside Disposal | unused |
| 27.4.1980 | 5 h Riverside | 88 | 911 | Maashoff / Michaelson / Korpiel | Barry Maashoff | 23rd |
| 27.4.1980 | DRM Nürburgring Eifelrennen | 88 | 924 | Friedrich Winkelmann | Essen Werdener Automobilclub e. V. im AvD | DNF |
| 27.4.1980 | 5 h Riverside | 89 | 911 Carrera RSR | Soto / Honegger | Hector Huerta Racing | 11th |
| 27.4.1980 | 5 h Riverside | 91 | 935 K3 | Whittington / Whittington | Whittington Brothers Racing | 30th |
| 27.4.1980 | 5 h Riverside | 93 | 935 K3 | Whittington / Whittington | Whittington Bros. | DNS |
| 27.4.1980 | 5 h Riverside | 94 | 935/79 | Whittington / Chandler | Whittington Bros. | 4th |
| 27.4.1980 | DRM Nürburgring Eifelrennen | | 911 Carrera | Roland Kußmaul | | DNF |
| 27.4.1980 | SM Hockenheim | | 934 | Edi Kofel | | ?th |
| 27.4.1980 | SM Hockenheim | | 935 RSR | Hans-Ruedi Hugentobler | | ?th |
| 27.4.1980 | SM Hockenheim | | 935 | Rolf Madörin | | ?th |
| 27.4.1980 | SM Hockenheim | | 935 RSR | Urs Schweizer | | ?th |