| 1st | 90 | Rolf Stommelen / Manfred Schurti / Dick Barbour | Porsche 935/77A | Dick Barbour Performance | 1:53.6110 |
| 2nd | 30 | Toine Hezemans / John Fitzpatrick / Peter Gregg | Porsche 935/77A | GeLo Racing | 1:54.4370 |
| 3rd | 0 | Danny Ongais / Ted Field | Porsche 935/77A | Interscope Racing | 1:54.6820 |
| 4th | 1 | George Follmer / Jacky Ickx | Porsche 935 | Vasek Polak Racing | 1:54.8620 |
| 5th | 2 | David Hobbs | BMW 320i Turbo | McLaren North America | 1:55.0570 |
| 6th | 08 | Hurley Haywood / John Paul | Porsche 935/77A | JLP Racing | 1:55.3410 |
| 7th | 3 | Janet Guthrie / Brian Redman / Hurley Haywood | Porsche 935 | Vasek Polak Racing | 1:57.0570 |
| 8th | 13 | Hal Shaw, Jr. / Monte Shelton | Porsche 935 | Hal Shaw Racing | 1:58.2890 |
| 9th | 94 | Bill Whittington / Don Whittington | Porsche 935/77A | Whittington Borthers | 1:58.6050 |
| 10th | 19 | Chris Cord / Jim Adams | Chevrolet Monza 350 | Chris Cord Racing | 1:58.6510 |
| 11th | 6 | Greg Pickett / Tom Gloy | Chevrolet Corvette 427 | Pickett Racing | 1:58.8460 |
| 12th | 7 | Ludwig Heimrath / Paul Miller | Porsche 935 | Heimrath Racing | 2:00.1470 |
| 13th | 10 | Hans-Joachim Stuck / Dieter Quester | BMW 320 | BMW Faltz Essen | 2:01.9040 |
| 14th | 20 | Markus Höttinger / Harald Grohs | BMW 320 | BMW Faltz Essen | 2:02.0490 |
| 15th | 71 | John Thomas / Otis Chandler | Porsche 935 | Otis Chandler | 2:02.2030 |
| 16th | 11 | Dave Heinz / Elliot Forbes-Robinson | Chevrolet Monza 350 | Budweiser Racing Team | 2:03.3300 |
| 17th | 4 | Hurley Haywood / John Gunn | Porsche 935 | Vasek Polak Racing | 2:04.6940 |
| 18th | 57 | Robert Frostrom / John Wood | Porsche Carrera RSR | Robert Frostrom Racing | 2:06.0020 |
| 19th | 75 | Norm Ridgely / Jim Cook | Porsche Carrera RSR | Norman Ridgely | 2:06.6860 |
| 20th | 44 | Brian Fuerstenau / Bob Tullius | Jaguar XJS | Group 44 | 2:06.8170 |
| 21st | 24 | Tom Frank / Bruce Leven | Porsche Carrera RSR | Executive Industries | 2:07.5350 |
| 22nd | 80 | Nick Engels | Chevrolet Corvette 454 | Nagel Racing Enterprises | 2:07.9750 |
| 23rd | 9 | John Huber / Babe Headley | Chevrolet Corvette 427 | Apple Valley Racing | 2:08.9550 |
| 24th | 81 | John Morton | Pontiac Firebird Trans-Am | Adams Associates | 2:09.3570 |
| 25th | 98 | Thomas Rynone / Michael Oleyar | Chevrolet Corvette 427 | Rynone Industries | 2:09.4900 |
| 26th | 43 | Frank Joyce / Gene Bothello | Chevrolet Corvette C3 427 | Phantom Racing | 2:10.5190 |
| 27th | 32 | Steve Griswold / Bob Akin | Porsche 911 Carrera RSR | Earle & Akin Racing Assoc. | 2:11.7080 |
| 28th | 97 | Werner Frank / Roger Schramm | Porsche Carrera RSR | Framm Promotions | 2:11.9160 |
| 29th | 79 | Michael Callas / Peter Papke | Porsche 911 Carrera RSR 3.0 | Rennsport Porsche Works | 2:11.9450 |
| 30th | 25 | François Migault / Lucien Guitteny | Ferrari 365 GT4/BB | Grand Competition Cars, Inc. | 2:12.2310 |
| 31st | 62 | Tuck Thomas | Porsche Carrera RSR | Lancer | 2:12.2810 |
| 32nd | 60 | John Brandt / Chuck Callas | Chevrolet Corvette C3 350 | John J. Brandt | 2:14.3470 |
| 33rd | 17 | Angelo Pallavicini / Enzo Calderari | Porsche 934 | Pallvano Corse | 2:15.3990 |
| 34th | 91 | Tom Roberts / Paul Schulte | Chevrolet Corvette 350 | Tom's Mechanical Emporium | 2:17.5620 |
| 35th | 64 | Craig Carter / Bob Baechle | Chevrolet Corvette 427 | Endurance Racing Enterprises, Inc./Auto Parts | 2:17.6020 |
| 36th | 88 | Joseph Hamilton / Ron Collins / Chuck Wade | Porsche 911 S | Hamilton House Racing | 2:17.9450 |
| 37th | 74 | Bill Scott | Porsche 911 S | Z & W Enterprises | 2:18.3650 |
| 38th | 29 | Hoyt Overbagh / Billy Hagan | Chevrolet Monza 350 | Billy J. Hagan | 2:18.6030 |
| 39th | 51 | Tom Aquilante / Dave White | Chevrolet Corvette 350 | Thomas Aquilante | 2:19.2820 |
| 40th | 77 | Bruce Jennings / John O'Steen | Porsche 911 S | Bruce Jennings | 2:21.4870 |
| 41st | 22 | Jeffrey Stephens | Porsche 911 Carrera RSR | Jeffrey Stephens | 2:22.1640 |
| 42nd | 18 | David Kicak / Bob Young | Chevrolet Corvette 360 | Free Spirit Racing | 2:24.7230 |
| 43rd | 82 | Carm Solomone | Chevrolet Camaro Turbo 302 | Solomone Racing | 2:27.4780 |
| 44th | 53 | Robert Schuler / David Schuler | Datsun 280Z | Fred Schuler | 2:32.9360 |
| 45th | 16 | Neil Kassel / Rex Franklin | Chevrolet Camaro 302 | Kassel Auto Parts of Syracuse | 2:39.2140 |
| 46th | 92 | John Orr / Bill Jobe | Chevrolet Corvette 454 | E. F. Miller & Co. and Sherill ARCO | 2:47.8570 |
| 47th | 12 | Ronnie Peterson | BMW 320i Turbo | McLaren North America | no time |