| 1st | 3 | Finotto / Facetti / Moretti | Porsche 935 | Jolly Club - Sportwagen Racing Team | 1:46.113 | 1:46.1130 |
| 2nd | 2 | Schurti / Fitzpatrick / Wollek | Porsche 935/77A | Gelo Racing Team | 1:46.746 | 1:46.7460 |
| 3rd | 1 | Wollek / Ickx / Gregg | Porsche 935/77A | Gelo Racing Team | 1:47.028 | 1:47.0280 |
| 4th | 4 | Jöst / Stommelen / Merl | Porsche 935/77A | LM Joest Porsche | 1:47.907 | 1:47.9070 |
| 5th | 18 | Paul / *Holbert / *Keyser | Porsche 935 JLP-1 | JLP Racing | 1:48.426 | 1:48.4260 |
| 6th | 94 | Whittington / Whittington / Barth | Porsche 935/79 | Whittington Bros. Racing | 1:49.397 | 1:49.3970 |
| 7th | 6 | Barbour / Redman / Newman | Porsche 935/77A | Dick Barbour Racing | 1:51.625 | 1:51.6250 |
| 8th | 00 | Henn / *Field / *Ongais | Porsche 935/77A | Interscope Racing | 1:52.807 | 1:52.8070 |
| 9th | 5 | Mendez / Rutherford / Miller | Porsche 935 | Budweiser Racing | 1:53.028 | 1:53.0280 |
| 10th | 0 | Field / Ongais / Haywood | Porsche 935/79 | Interscope Racing | 1:54.072 | 1:54.0720 |
| 11th | 9 | Akin / McFarlin / Woods | Porsche 935 | Dick Barbour Racing | 1:54.500 | 1:54.5000 |
| 12th | 23 | Kemp / Baird / Nierop | Ford Cobra II | Charlie Kemp | 1:56.726 | 1:56.7260 |
| 13th | 67 | Ballot-Léna / Leclère / Andruet | Ferrari 512 BB | JMS Racing-Pozzi | 1:57.376 | 1:57.3760 |
| 14th | 21 | Wood / Bagley / Shafer | Chevrolet Camaro | Oftedahl Racing | 1:57.717 | 1:57.7170 |
| 15th | 66 | Andruet / Dini / Ballot-Léna | Ferrari 512 BB | JMS Racing-Pozzi | 1:58.780 | 1:58.7800 |
| 16th | 68 | Tullius / Delaunay / Bedard | Ferrari 512 BB | N.A.R.T. | 1:58.823 | 1:58.8230 |
| 17th | 56 | Carter / Edwards / Valentine | Chevrolet Camaro | Peerless Racing | 1:59.423 | 1:59.4230 |
| 18th | 29 | Hagan / Overbagh / Reed | Chevrolet Monza | Stratagraph Inc. | 1:59.994 | 1:59.9940 |
| 19th | 11 | Canepa / Mears / Shelton | Porsche 935 | Bruce Canepa | 2:00.386 | 2:00.3860 |
| 20th | 38 | Fernandez / Soldevilla / Ferrer | Porsche Carrera RSR | Boricua Racing | 2:00.948 | 2:00.9480 |
| 21st | 81 | Soto / Romero / Notz | Porsche 911 Carrera RSR | Performance Export | 2:01.072 | 2:01.0720 |
| 22nd | 07 | Cowart / McClain / Miller | Porsche Carrera RSR | Budweiser Racing | 2:01.412 | 2:01.4120 |
| 23rd | 46 | DeNarvaez / Naon / DeNarvaez | Porsche 911 Carrera RSR | Mauricio De Narvaez | 2:01.586 | 2:01.5860 |
| 24th | 58 | Febles / Currin | Porsche 911 Carrera RSR | Diego Febles Racing | 2:02.178 | 2:02.1780 |
| 25th | 12 | Wellik / Bagley / Chamberlain / *Wood | Chevrolet Camaro | Oftedahl Racing | 2:02.578 | 2:02.5780 |
| 26th | 37 | Espinosa / Lopez / Cortes | Porsche Carrera RSR | Botero Racing | 2:02.649 | 2:02.6490 |
| 27th | 69 | Bytzek / Bartling / Heimrath | Porsche Carrera RSR | Bytzek Automotive | 2:03.995 | 2:03.9950 |
| 28th | 73 | Howey / *Koch / *Wolf | Chevrolet Camaro | Howey Farms | 2:04.328 | 2:04.3280 |
| 29th | 98 | Van Every / Tisdelle / Overby | Porsche Carrera RSR | Van Every Racing | 2:04.607 | 2:04.6070 |
| 30th | 7 | Katayama / Terada / Yorino | Mazda RX-7 | Mazda Technical Center | 2:05.403 | 2:05.9550 |
| 31st | 43 | McDill / Behr | Chevrolet Camaro | Meldeau Tire Co. | 2:05.621 | 2:05.6210 |
| 32nd | 65 | Morton / Adamowicz | Ferrari 365 GTB/4 | Modena Sports Cars | 2:05.791 | 2:05.7910 |
| 33rd | 54 | Garcia / Montalvo / Vadia | Porsche Carrera RSR | Montura Ranch Estates | 2:06.274 | 2:06.2740 |
| 34th | 77 | Bohren / Johnson / Mandeville | Mazda RX-7 | Mazda Technical Center | 2:06.804 | 2:06.8040 |
| 35th | 93 | Whittington / Whittington / Henn | Porsche 934 | Whittington Bros. Racing | 2:06.847 | 2:06.8470 |
| 36th | 15 | Gebhardt / Grinbold | BMW CSL | Bavarian Motors International | 2:08.166 | 2:08.1660 |
| 37th | 51 | Kirby / Hotchkis / Meister | Porsche Carrera RSR | Casablanca Fan Co. | 2:08.292 | 2:08.2920 |
| 38th | 01 | White / Roehrig / Hamilton | Porsche 911 | D. R. Racing | 2:08.508 | 2:08.5080 |
| 39th | 62 | Koll / Cook | Porsche 914/6 | Koll Motorsports | 2:09.314 | 2:09.3140 |
| 40th | 03 | Calderari / Pallavicini / Vanoli | Porsche 934 | Lubrifilm Racing | 2:09.383 | 2:09.3830 |
| 41st | 71 | Scott / Hutchins / Honegger | Porsche 911 | Bill Scott Racing | 2:09.451 | 2:09.4510 |
| 42nd | 13 | Shaw, Jr. / Spalding / Ridgely | Porsche 935 | Hal Shaw Racing | 2:09.852 | 2:09.8520 |
| 43rd | 17 | Mederer / Sherman / Kline | Mazda RX-7 | Racing Beat | 2:10.099 | 2:10.0990 |
| 44th | 27 | Mummery / Sheehy / Sereix | Porsche 911 S | Miami Auto Racing | 2:10.219 | 2:10.2190 |
| 45th | 42 | Ashby / Bean / Beasley | Porsche 911 | Bullwinkele Racing, Inc. | 2:10.600 | 2:10.6000 |
| 46th | 89 | Hamilton / Hoskins / Forrest | Porsche 911 | Hamilton House Racing | 2:10.618 | 2:10.6180 |
| 47th | 34 | Drolsom / Greb / Maffucci | Porsche 911 | Drolsom Racing | 2:11.186 | 2:11.1860 |
| 48th | 61 | Cosentino / Starita / Akaike | Mazda RX-3 | Faza Squadra | 2:11.757 | 2:11.7570 |
| 49th | 75 | Ramirez / Villa / Gordillo | Porsche 911 | Mike Ramirez | 2:12.600 | 2:12.6000 |
| 50th | 60 | Bond / Tilton | Porsche 911 | E. J. Pruitt & Sons | 2:12.729 | 2:12.7290 |
| 51st | 53 | Thomas / Moise / Nehl | Chevrolet Camaro | Guy Thomas | 2:12.783 | 2:12.7830 |
| 52nd | 36 | Case / Panaccione | Porsche 911 | Case Racing | 2:13.041 | 2:13.0410 |
| 53rd | 8 | Arutunoff / Marina / Sullivan | Lancia Stratos | Automobiles International Inc. | 2:13.226 | 2:13.2260 |
| 54th | 64 | Canada / Boykin / Ciccone | Chevrolet Camaro | Lenton B. McGill | 2:13.721 | 2:13.7210 |
| 55th | 33 | Welter / Aten / Refenning | Porsche 911 | Peter Welter | 2:13.905 | 2:13.9050 |
| 56th | 90 | Kump / Lee / Miller | AMC AMX | Bob's Speed Products | 2:14.460 | 2:14.4600 |
| 57th | 06 | Levenson / Baker / Hester | Chevrolet Corvette | Al Levenson | 2:14.960 | 2:14.9600 |
| 58th | 48 | Leary / *Mollett / *Cook | Datsun 240Z | Frank L. Leary, III | 2:15.453 | 2:15.4530 |
| 59th | 40 | Southard / Koch / Roe | Porsche 914/6 | Performance Specialists | 2:15.466 | 2:15.4660 |
| 60th | 96 | Wonzer / *Whitaker / *Van Arsdale / *Hughes | Triumph GT6 | Gary Wonzer | 2:16.117 | 2:16.1170 |