Columns: Rnd | Circuit | GTO Winning Team | GTU Winning Team | TO Winning Team | TU Winning Team | Results
1 | Sebring | #59 Dave Helmick | #27 Don Lindley | #17 Vince Gimondo | #112 Jim Grob Racing | results | 1 | Sebring | Peter Gregg Hurley Haywood Dave Helmick | Don Lindley Stephen Behr Brian Goellnicht | Vince Gimondo Billy Dingman | Jim Grob Juan Montalvo | results | 2 | Daytona | #59 Brumos Porsche-Audi Corp. | #32 Bob Bergstrom | #88 Carter Racing Services | #112 Jim Grob Racing | results | 2 | Daytona | Peter Gregg Hurley Haywood | Bob Bergstrom Jim Cook | Maurice Carter | Jim Grob Juan Montalvo | results | 3 | Pocono | #1 Toad Hall Motor Racing | #62 Bob Bergstrom | #88 Carter Racing Services | #90 Z & W Mazda | results | 3 | Pocono | Mike Keyser Stephen Behr | Bob Bergstrom Jim Cook | Maurice Carter Tony DeLorenzo | Ray Walle Bob Speakman Richard Schuck | results | 4 | Daytona | #96 Gene Felton | #62 Bob Bergstrom | #88 Carter Racing Services | #32 BMW | results | 4 | Daytona | Gene Felton | Bob Bergstrom | Maurice Carter | Phil Dermer | results | 5 | Mid-Ohio | #1 Toad Hall Motor Racing | #62 Bob Bergstrom | #3 Ausca, Inc. | #60 Auto Sport by Jiri | results | 5 | Mid-Ohio | Mike Keyser Bob Beasley | Bob Bergstrom Jim Cook | Harry Theodoracopulos Horst Kwech | Dave Nicholas John Magee | results | 6 | Lime Rock | #1 Toad Hall Motor Racing | #62 Bob Bergstrom | #18 Warren Agor | #60 Auto Sport by Jiri | results | 6 | Lime Rock | Mike Keyser | Bob Bergstrom | Warren Agor | Dave Nicholas | results | 7 | Lime Rock | #59 Peter Gregg | #74 Ludwig Heimrath | #18 Warren Agor | #60 John Magee | results | 7 | Lime Rock | Peter Gregg | Ludwig Heimrath | Warren Agor | John Magee | results | 8 | Road Atlanta | #59 Peter Gregg | #74 Ludwig Heimrath | #3 Ausca | no finishers | results | 8 | Road Atlanta | Peter Gregg | Ludwig Heimrath | Horst Kwech | no finishers | results | 9 | IRP | #59 Peter Gregg | #74 Ludwig Heimrath | #3 Ausca | #90 Z & W Mazda | results | 9 | IRP | Peter Gregg | Ludwig Heimrath | Harry Theodoracopulos Horst Kwech | Ray Walle Ray Kraftson | results | 10 | Daytona | #59 Peter Gregg | #74 Ludwig Heimrath | #18 Warren Agor Racing | #35 BMW | results