| 1st | 1 | Jochen Mass / Jacky Ickx | Porsche 935/77 | Martini Racing Porsche System | 1:52.5180 | 173.8848 |
| 2nd | 3 | Ronnie Peterson / David Hobbs | BMW 320i Turbo | McLaren North America | 1:52.9970 | |
| 3rd | 16 | George Follmer / Brett Lunger | Porsche 935 | Vasek Polak Racing | 1:56.0620 | |
| 4th | 77 | John Greenwood / Dick Smothers | Chevrolet Corvette/Greenwood | John Greenwood Racing | 1:56.8140 | 167.4876 |
| 5th | 95 | Hurley Haywood / Bob Hagestad | Porsche 934/5 | Bob Hagestad Porsche Audi | 1:57.8240 | |
| 6th | 59 | Peter Gregg / Claude Ballot-Léna / John Gunn | Porsche 934 | Brumos Racing | 1:57.8790 | |
| 7th | 61 | Jim Busby / Tom Frank | Porsche 935 | Jim Busby Racing | 1:58.3530 | |
| 8th | 0 | Danny Ongais / Ted Field | Porsche 934/5 | Interscope Racing | 1:58.3800 | |
| 9th | 7 | Ludwig Heimrath / Paul Miller | Porsche 934/5 | Heimrath Racing | 2:00.4600 | |
| 10th | 66 | Dick Barbour / Johnny Rutherford | Porsche 934/5 | Dick Barbour Performance | 2:01.8310 | |
| 11th | 6 | Greg Pickett / Tom Gloy | Chevrolet Monza | Pickett Racing | 2:02.7130 | |
| 12th | 4 | Hans-Joachim Stuck / Benny Parsons | BMW 320i | BMW Faltz Assen | 2:03.3990 | |
| 13th | 20 | Janet Guthrie / Randy Lewis | Porsche 934 | Vasek Polak Racing | 2:03.5160 | |
| 14th | 2 | Gary Belcher / Roy Woods | Porsche 934/5 | Vasek Polak Racing | 2:03.8840 | |
| 15th | 76 | Paul DePirro / Buzz Fyhrie | Chevrolet Corvette/Greenwood GT | Rick Mancuso Chevrolet Corvettes | 2:05.9310 | |
| 16th | 31 | Warren Agor / Paul Nichter | Chevrolet Monza | Warren Agor | 2:06.0650 | |
| 17th | 94 | Elliot Forbes-Robinson / Mike Tillson | Porsche 934 | Mike Tillson Enterprises, Inc. | 2:06.1200 | |
| 18th | 38 | John Paul / Phil Currin | Porsche Carrera RSR | John Paul | 2:07.5650 | |
| 19th | 56 | Craig Carter / David Laughlin | Chevrolet Camaro | Carter Brothers Racing | 2:07.6080 | |
| 20th | 75 | Norm Ridgely / Jim Cook | Porsche Carrera RSR | Ridgely Racing | 2:07.6920 | |
| 21st | 44 | Brian Fuerstenau / Bob Tullius | Jaguar XJS | Group 44, Inc. | 2:08.1820 | 152.6334 |
| 22nd | 51 | Robert Frostrom / Monte Shelton | Porsche Carrera RSR | Monte's Motors | 2:08.3230 | |
| 23rd | 48 | Len LaCue / Doug Mills | Chevrolet Camaro Z28 | LaCue Racing | 2:09.2400 | |
| 24th | 45 | William Coykendall / James Mancuso | Chevrolet Corvette/Greenwood | Motion Marketing | 2:09.2860 | |
| 25th | 98 | John Bauer / Tom Spalding | Porsche 911 | John Bauer Racing | 2:09.7590 | |
| 26th | 9 | John Huber / Ron Weaver | Chevrolet Corvette C3 | Team Apple/Monoca Huber | 2:09.8390 | |
| 27th | 80 | Nick Engels / Bob Nagel | Chevrolet Corvette | Nagel Racing | 2:10.0790 | |
| 28th | 78 | Babe Headley / Sam Feinstein | Chevrolet Corvette | Babe's Garage | 2:10.2420 | |
| 29th | 79 | Michael Callas / Peter Papke | Porsche 911 Carrera RSR 3.0 | Michael Callas Rennsport Porsche | 2:10.3950 | |
| 30th | 57 | Bob Lazier / John Wood | Porsche 911 Carrera RSR 3.0 | John Wood Racing | 2:11.2240 | |
| 31st | 13 | Hal Shaw, Jr. / Randolph Townsend | Porsche Carrera RSR | Hal Shaw, Jr. | 2:12.6770 | |
| 32nd | 90 | Thomas Rynone / Neil Wiernicki | Chevrolet Corvette | Rynone Industries | 2:13.2930 | |
| 33rd | 93 | Michael Oleyar / John Brandt | Chevrolet Corvette | Little Foreign Car Shop | 2:13.3780 | |
| 34th | 30 | Alex Davidson / Kerry Hitt | Chevrolet Corvette | Alex Davidson Racing | 2:13.6520 | |
| 35th | 83 | Bill Scott / Joe Colontonio | Porsche 911 S | Bill Scott Racing | 2:13.6660 | |
| 36th | 92 | John Orr / Bill Jobe | Chevrolet Corvette | E. F. Miller | 2:15.1510 | |
| 37th | 64 | Bob Baechle / Earl Hurlbut | Chevrolet Corvette | Auto Barn | 2:16.7840 | |
| 38th | 74 | Bruce Jennings / Bill Bean | Porsche 911 S | Bruce Jennings | 2:19.5380 | |
| 39th | 18 | David Kicak / Bob Young | Chevrolet Corvette | Free Spirit Racing | 2:19.6800 | |
| 40th | 28 | Richard Weiss | Porsche 911 SC | Weiss Motor Racing | 2:21.0940 | |
| 41st | 17 | Brian Goellnicht | Lancia Stratos | Hallet Motor Racing Circuit | no time | |
| 42nd | 71 | Ted Sullivan | Chevrolet Camaro Z28 | Triumph Manufacturing | no time | |
| 43rd | 96 | Neil Kassel / Rex Franklin | Chevrolet Corvette | GTS/Kassel Auto Parts | no time | |
| 44th | 15 | Bill Schumacher | Chevrolet Corvette | Iroquois Racing Associates | no time | |