| 1st | 1 | Ickx / Mass / *Barth | Porsche 935 | Martini Racing Porsche System | 1:48.289 | 1:48.2890 |
| 2nd | 8 | Jöst / Wollek / Krebs | Porsche 935 | Porsche Kremer Racing | 1:49.099 | 1:49.0990 |
| 3rd | 20 | Rondeau / Beltoise / *Holbert | Inaltera Ford | Inaltera Motors | 1:52.720 | 1:52.7200 |
| 4th | 21 | Beckers / Lombardi / *Rondeau | Inaltera Ford | Inaltera Motors | 1:54.262 | 1:54.2620 |
| 5th | 3 | Finotto / Facetti / Camathias | Porsche 935 | Jolly Club | 1:55.047 | 1:55.0470 |
| 6th | 61 | Gregg / Busby | Porsche 934 | Brumos Racing | 1:56.070 | 1:56.8940 |
| 7th | 00 | Ongais / *Follmer / *Field | Porsche 911 Carrera RSR Turbo | Interscope Racing | 1:56.738 | 1:56.7380 |
| 8th | 14 | Holbert / Keyser / Ballot-Léna | Chevrolet Monza | Dickinson/Holbert Racing | 1:57.417 | 1:57.4170 |
| 9th | 47 | Fitzpatrick / Miller / Miller | BMW 3.5 CSL | KWM Racing | 1:58.042 | 1:58.0420 |
| 10th | 05 | Trueman / Thompson / Yenko | Chevrolet Monza | Red Roof Inns, Inc. | 1:59.728 | 1:59.7280 |
| 11th | 55 | Thompkins / Heinz / Mann | Chevrolet Corvette | Rick Thompkins | 2:01.399 | 2:01.3990 |
| 12th | 43 | Haywood / Graves / Helmick | Porsche Carrera RSR | Ecurie Escargot | 2:01.499 | 2:01.4990 |
| 13th | 41 | Jones, Jr. / Faul | Chevrolet Camaro II | Jones Ind. Racing | 2:02.070 | 2:02.0700 |
| 14th | 96 | Felton / Cason / Reeve | Chevrolet Camaro | Clay Young | 2:02.487 | 2:02.4870 |
| 15th | 78 | Headley / Feinstein / *Panzarella | Chevrolet Corvette | Babe's Garage | 2:02.791 | 2:02.7910 |
| 16th | 24 | Frank / Shafer | Porsche Carrera RSR | Executive Industries | 2:02.845 | 2:02.8450 |
| 17th | 63 | Field / Woodner / *Holmes / *Ongais | Porsche 911 Carrera RSR 3.0 | Interscope Racing | 2:02.893 | 2:02.8930 |
| 18th | 58 | Febles / Gonzalez / Cruz | Porsche 911 Carrera RSR | Diego Febles Racing | 2:03.010 | 2:03.0100 |
| 19th | 2 | Hobbs / Peterson / Posey | BMW 320 | BMW Motorsport GmbH | 2:03.031 | 2:03.0310 |
| 20th | 99 | Currin / Hoskins / Knab | Chevrolet Corvette | Phil Currin | 2:03.597 | 2:03.5970 |
| 21st | 30 | Dyer / Frisselle | Porsche 911 Carrera RSR 3.0 | George Dyer | 2:04.410 | 2:04.4100 |
| 22nd | 64 | Forbes-Robinson / Newman / Minter | Ferrari 365 GTB/4 | Ramsey Ferrari/Modena | 2:05.059 | 2:05.0590 |
| 23rd | 77 | Greenwood / Mancuso / Cargill / Heinz | Chevrolet Corvette C3 | Mancuso Chevrolet | 2:05.769 | 2:05.7690 |
| 24th | 65 | Carradine / Morton / Woods | Ferrari 365 GTB/4 | Ramsey Ferrari/Modena | 2:06.003 | 2:06.0030 |
| 25th | 72 | Arnold / Thompson / Hagan | Chevrolet Corvette | Bill Arnold Racing | 2:07.579 | 2:07.5790 |
| 26th | 42 | Hindson / Carney / Davenport | Porsche 911 S | Bob Hindson Racing | 2:08.197 | 2:11.2080 |
| 27th | 9 | Bytzek / Bytzek / Bartling | Porsche Carrera RSR | Bytzek Automotive Design | 2:08.682 | 2:08.6820 |
| 28th | 79 | Callas / Jolly / Laffeach / Papke | Porsche 911 Carrera RSR 3.0 | Michael Callas | 2:09.341 | 2:09.3410 |
| 29th | 80 | Solomone / Lang / *Fyhrie | Chevrolet Camaro | Carmon Solomone | 2:10.029 | 2:10.0290 |
| 30th | 66 | Adamowicz / Cannon / Barbour | Ferrari 365 GTB/4 | Ramsey Ferrari/Modena | 2:10.306 | 2:10.3060 |
| 31st | 70 | Gang / Gonzalez / Duke / *Papke | Porsche Carrera RSR | Michael Callas | 2:10.715 | 2:10.7150 |
| 32nd | 46 | DeNarvaez / Naon / Freyre | Porsche 911 Carrera RSR | Mauricio de Narvaez | 2:12.031 | 2:12.0310 |
| 33rd | 10 | Speer / Turley / Sahlman | Porsche 911 S | M. L. Speer | 2:12.294 | 2:12.2940 |
| 34th | 48 | Sereix / Carusso / Donaldson | Chevrolet Corvette | Autodyne | 2:12.359 | 2:12.3590 |
| 35th | 38 | Paul / O'Steen / Hagestad | Porsche Carrera RSR | John Paul | 2:12.456 | 2:12.4560 |
| 36th | 51 | Kirby / Hotchkis / *Aase | Porsche 914/6 | Kirby Hitchcock Racing | 2:13.666 | 2:13.6660 |
| 37th | 60 | Bond / Tilton / Thomas | Porsche 911 S | R & R Racing | 2:13.900 | 2:13.9000 |
| 38th | 07 | Mendez / Cowart / Panaccione | Porsche 911 T | Charles Mendez | 2:13.918 | 2:13.9180 |
| 39th | 39 | Doran / Barnett / Pelz | Chevrolet Corvette | Wiley Doran | 2:15.365 | 2:15.3650 |
| 40th | 71 | Higgins / Mead / White | Porsche 911 | The Foreign Exchange | 2:18.041 | 2:18.0410 |
| 41st | 28 | Weiss / Alsup / Gage | Porsche 911 S | Weiss Motor Racing | 2:19.223 | 2:19.2230 |
| 42nd | 01 | Bergstrom / *Cook | Porsche 911 S | Sports Ltd. Racing | 2:19.335 | 2:19.3350 |
| 43rd | 34 | Drolsom / Scott / Bagley | Porsche 911 S | Drolsom Racing | 2:21.818 | 2:21.8180 |
| 44th | 02 | Levenson / Rice / Levetto | Chevrolet Corvette | Al Levenson | 2:22.579 | 2:22.5790 |
| 45th | 18 | Swanson / Wolters | Chevrolet Camaro | Terry Wolters | 2:22.582 | 2:22.5820 |
| 46th | 33 | Dube / Zitza / Castellano | Porsche 911 | Ara Dube | 2:23.033 | 2:23.0330 |
| 47th | 84 | Boykin / Henderson / *Canada | Chevrolet Camaro | Lenton B. McGill | 2:23.174 | 2:23.1740 |