| 1st | 3 | Martino Finotto / Carlo Facetti / Gianpiero Moretti | Porsche 935 | Jolly Club - Sportwagen Racing Team | 1:46.1130 |
| 2nd | 2 | Manfred Schurti / John Fitzpatrick / Bob Wollek | Porsche 935/77A | Gelo Racing Team | 1:46.7460 |
| 3rd | 1 | Bob Wollek / Jacky Ickx / Peter Gregg | Porsche 935/77A | Gelo Racing Team | 1:47.0280 |
| 4th | 4 | Reinhold Jöst / Rolf Stommelen / Volkert Merl | Porsche 935/77A | LM Joest Porsche | 1:47.9070 |
| 5th | 18 | John Paul | Porsche 935 JLP-1 | JLP Racing | 1:48.4260 |
| 6th | 94 | Don Whittington / Bill Whittington / Jürgen Barth | Porsche 935/79 | Whittington Bros. Racing | 1:49.3970 |
| 7th | 6 | Dick Barbour / Brian Redman / Paul Newman | Porsche 935/77A | Dick Barbour Racing | 1:51.6250 |
| 8th | 0 | Ted Field / Danny Ongais / Hurley Haywood | Porsche 935/79 | Interscope Racing | 1:54.0720 |
| 9th | 9 | Bob Akin / Rob McFarlin / Roy Woods | Porsche 935 | Dick Barbour Racing | 1:54.5000 |
| 10th | 23 | Charlie Kemp / Carson Baird / Kees Nierop | Ford Cobra II | Charlie Kemp | 1:56.7260 |
| 11th | 00 | Preston Henn | Porsche 935/77A | Interscope Racing | 1:52.8070 |
| 12th | 5 | Charles Mendez / Johnny Rutherford / Paul Miller | Porsche 935 | Budweiser Racing | 1:53.0280 |
| 13th | 67 | Claude Ballot-Léna / Michel Leclère / Jean-Claude Andruet | Ferrari 512 BB | JMS Racing-Pozzi | 1:57.3760 |
| 14th | 21 | John Wood / Tom Bagley / Carl Shafer | Chevrolet Camaro | Oftedahl Racing | 1:57.7170 |
| 15th | 66 | Jean-Claude Andruet / Spartaco Dini / Claude Ballot-Léna | Ferrari 512 BB | JMS Racing-Pozzi | 1:58.7800 |
| 16th | 68 | Bob Tullius / Jean-Pierre Delaunay / Pat Bedard | Ferrari 512 BB | N.A.R.T. | 1:58.8230 |
| 17th | 56 | Craig Carter / Murray Edwards / Richard Valentine | Chevrolet Camaro | Peerless Racing | 1:59.4230 |
| 18th | 29 | Billy Hagan / Hoyt Overbagh / Ron Reed | Chevrolet Monza | Stratagraph Inc. | 1:59.9940 |
| 19th | 11 | Bruce Canepa / Rick Mears / Monte Shelton | Porsche 935 | Bruce Canepa | 2:00.3860 |
| 20th | 38 | Bonky Fernandez / Chiqui Soldevilla / Tato Ferrer | Porsche Carrera RSR | Boricua Racing | 2:00.9480 |
| 21st | 81 | Ernesto Soto / Francisco Romero / Oscar Notz | Porsche 911 Carrera RSR | Performance Export | 2:01.0720 |
| 22nd | 07 | Dave Cowart / David McClain / Kenper Miller | Porsche Carrera RSR | Budweiser Racing | 2:01.4120 |
| 23rd | 46 | Mauricio DeNarvaez / Albert Naon / Pedro DeNarvaez | Porsche 911 Carrera RSR | Mauricio De Narvaez | 2:01.5860 |
| 24th | 65 | John Morton / Tony Adamowicz | Ferrari 365 GTB/4 | Modena Sports Cars | 2:05.7910 |
| 25th | 58 | Diego Febles / Phil Currin | Porsche 911 Carrera RSR | Diego Febles Racing | 2:02.1780 |
| 26th | 12 | Gerry Wellik / Tom Bagley / Joe Chamberlain | Chevrolet Camaro | Oftedahl Racing | 2:02.5780 |
| 27th | 37 | Honorato Espinosa / Francisco Lopez / Jorge Cortes | Porsche Carrera RSR | Botero Racing | 2:02.6490 |
| 28th | 69 | Klaus Bytzek / Rudy Bartling / Ludwig Heimrath | Porsche Carrera RSR | Bytzek Automotive | 2:03.9950 |
| 29th | 73 | Clark Howey | Chevrolet Camaro | Howey Farms | 2:04.3280 |
| 30th | 98 | Lance Van Every / Ash Tisdelle / Robert Overby | Porsche Carrera RSR | Van Every Racing | 2:04.6070 |
| 31st | 43 | Bill McDill / Stephen Behr | Chevrolet Camaro | Meldeau Tire Co. | 2:05.6210 |
| 32nd | 7 | Yoshimi Katayama / Yojiro Terada / Takashi Yorino | Mazda RX-7 | Mazda Technical Center | 2:05.9550 |
| 33rd | 54 | Tony Garcia / Juan Montalvo / Alberto Vadia | Porsche Carrera RSR | Montura Ranch Estates | 2:06.2740 |
| 34th | 77 | Walt Bohren / Amos Johnson / Roger Mandeville | Mazda RX-7 | Mazda Technical Center | 2:06.8040 |
| 35th | 93 | Dale Whittington / R. D. Whittington / Preston Henn | Porsche 934 | Whittington Bros. Racing | 2:06.8470 |
| 36th | 15 | Alf Gebhardt / Sepp Grinbold | BMW CSL | Bavarian Motors International | 2:08.1660 |
| 37th | 51 | Robert Kirby / John Hotchkis / Howard Meister | Porsche Carrera RSR | Casablanca Fan Co. | 2:08.2920 |
| 38th | 01 | Dave White / J. Kurt Roehrig / John Hamilton | Porsche 911 | D. R. Racing | 2:08.5080 |
| 39th | 62 | Bill Koll / Jim Cook | Porsche 914/6 | Koll Motorsports | 2:09.3140 |
| 40th | 03 | Enzo Calderari / Angelo Pallavicini / Marco Vanoli | Porsche 934 | Lubrifilm Racing | 2:09.3830 |
| 41st | 71 | Bill Scott / Mark Hutchins / Pierre Honegger | Porsche 911 | Bill Scott Racing | 2:09.4510 |
| 42nd | 13 | Hal Shaw, Jr. / Tom Spalding / Norm Ridgely | Porsche 935 | Hal Shaw Racing | 2:09.8520 |
| 43rd | 17 | Jim Mederer / Don Sherman / Jeff Kline | Mazda RX-7 | Racing Beat | 2:10.0990 |
| 44th | 27 | Ray Mummery / Tom Sheehy / Luis Sereix | Porsche 911 S | Miami Auto Racing | 2:10.2190 |
| 45th | 42 | Tom Ashby / Bill Bean / Bob Beasley | Porsche 911 | Bullwinkele Racing, Inc. | 2:10.6000 |
| 46th | 89 | Joseph Hamilton / Rob Hoskins / Herb Forrest | Porsche 911 | Hamilton House Racing | 2:10.6180 |
| 47th | 34 | George Drolsom / Mark Greb / John Maffucci | Porsche 911 | Drolsom Racing | 2:11.1860 |
| 48th | 61 | Al Cosentino / Dick Starita / Taku Akaike | Mazda RX-3 | Faza Squadra | 2:11.7570 |
| 49th | 75 | Mike Ramirez / Manuel Villa / Luis Gordillo | Porsche 911 | Mike Ramirez | 2:12.6000 |
| 50th | 60 | Rusty Bond / Ren Tilton | Porsche 911 | E. J. Pruitt & Sons | 2:12.7290 |
| 51st | 53 | Guy Thomas / Milton Moise / Tom Nehl | Chevrolet Camaro | Guy Thomas | 2:12.7830 |
| 52nd | 36 | Ron Case / Dave Panaccione | Porsche 911 | Case Racing | 2:13.0410 |
| 53rd | 8 | Anatoly Arutunoff / José Marina / Danny Sullivan | Lancia Stratos | Automobiles International Inc. | 2:13.2260 |
| 54th | 64 | C. C. Canada / Russ Boykin / Tom Ciccone | Chevrolet Camaro | Lenton B. McGill | 2:13.7210 |
| 55th | 33 | Peter Welter / Richard Aten / Jack Refenning | Porsche 911 | Peter Welter | 2:13.9050 |
| 56th | 90 | Rick Kump / Bob Lee / Sam Miller | AMC AMX | Bob's Speed Products | 2:14.4600 |
| 57th | 06 | Al Levenson / Gary Baker / Lanny Hester | Chevrolet Corvette | Al Levenson | 2:14.9600 |
| 58th | 48 | Frank Leary | Datsun 240Z | Frank L. Leary, III | 2:15.4530 |
| 59th | 40 | Steve Southard / William Koch / Earl Roe | Porsche 914/6 | Performance Specialists | 2:15.4660 |
| 60th | 96 | Gary Wonzer | Triumph GT6 | Gary Wonzer | 2:16.1170 |
| 61st | 14 | Steve Griswold | BMW CSL | Bavarian Motors International | no time |
| 62nd | 24 | Graham Shaw / Don Yenko / Jerry Thompson | Chevrolet Monza | Graham Shaw | no time |
| 63rd | 57 | John Tremblay / Bob Lapp | Datsun 240Z | John Tremblay | no time |
| 64th | 79 | Bob Bergstrom | Mazda RX-7 | Sports Ltd. Racing | no time |
| 65th | 80 | Herb Adams / Peter Frey / Louis Spoerl | Pontiac Firebird | Herb Adams | no time |
| 66th | 95 | Stephen Bond / Philip Dann | Chevrolet Monza | Stephen E. Bond | no time |
| 67th | 08 | Terry Wolters / Nort Northam / Richard Weiss | Porsche 911 | Southern Racing Ent. | no time |