1989 IMSA GTO Championship

Round Date Race
1 5th February Daytona 24 Hours
2 5th March Miami
3 18th March Sebring 12 Hours
4 21st May Summit Point
5 4th June Mid-Ohio
6 25th June Mosport
7 16th July Road America
8 30th July Portland
9 12th August Topeka
10 3rd September San Antonio
11 10th September Sears Point
12 24th September Watkins Glen
13 1st October Lime Rock
14 15th October Laguna Seca
15 22nd October Del Mar

Round 2: Xtra Super Food Centers 45 minutes
5th March 1989 - Miami: 87.415 km (3.057 km x 29 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 29 0:44:58,895  1. GTO 1. 1:20,112 
2. 03 Tom Kendall (USA) Chevrolet Beretta Skoal Bandit Racing 29 0:45:00,576  2. GTO 3.
3. 18 "Fomfor" (ES) Chevrolet Camaro
29
3. GTO 12.
4. 65 Gonzalez Chevrolet Camaro
29
4. GTO 6.
5. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 29
5. GTO 4.
6. 72 John Finger (USA) Mazda RX-7
29
1. GTU 11.
7. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 29
2. GTU 24.
8. 74 George Robinson (USA) Pontiac Fiero Huffaker Racing 29
3. GTU 14.
9. 23 Javier Garcia (USA) Chevrolet Corvette
29
6. GTO 16.
10. 34 Kikos Fonseca (CR) Porsche 934
28
7. GTO 42.
11. 06 Bill Wink (USA) Chevrolet Camaro
28
8. GTO 15.
12. 17 Al Bacon (USA) Mazda RX-7 Al Bacon Perf 28
4. GTU 18.
13. 46 Adriano Abreu (DR) Nissan 280Z Servicenter Abreu 28
5. GTU 17.
14. 47 Chaunce Wallace (USA) Chevrolet Camaro Lion Rampant Racing 28
9. GTO 25.
15. 31 Anthony Puleo (USA) Chevrolet Camaro Puleo Racing 28
10. GTO 40.
16. 28 Lance Stewart (USA) Mazda RX-7
28
6. GTU 26.
17. 32 Chuck Kurtz (USA) Nissan 300ZX
28
7. GTU 32.
18. 05 Ken Hendrick (USA) Oldsmobile Toronado Ken Hendrick Racing 28
1. AC 41.
19. 57 Todd Morici (USA) Nissan 300ZX Kryderacing 28
8. GTU 29.
20. 51 Carson Hurley (USA) Buick Skylark
28
2. AC 28.
21. 54 Richard Valentine (USA) Chevrolet Camaro
27
11. GTO 21.
22. 27 Jeff Alkazian (USA) Mazda RX-7
27
9. GTU 27.
23. 82 Dick Greer (USA) Mazda RX-7
27
10. GTU 31.
24. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 27
11. GTU 30.
25. 75 Steve Millen (NZ) Nissan 300ZX Cunningham Racing 27
12. GTO 43.
26. 68 Luis Mendez (DR) Porsche 911
27
12. GTU 36.
27. 48 Ike Graham (USA) BMW 325
27
13. GTU 20.
28. 47 Juan Negron (PR) Mazda RX-7
27
14. GTU 3.
29. 71 Amos Johnson (USA) Mazda RX-7 Team Highball 26 Accident 15. GTU 9. 1:26,395 
30. 49 Carlos Lopez (USA) Porsche 911
26
16. GTU 37.
31. 80 Gary Smith (USA) Chevrolet Camaro
26
13. GTO 39.
32. 76 Sam Range (USA) Buick Somerset
25
3. AC 38.
33. 07 Joe Varde (USA) Dodge Daytona Full Time Racing 24 Accident 17. GTU 10.
34. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 19 Gearbox 14. GTO 2.
35. 77 Paul Lewis (USA) Mazda RX-7 Team Highball 19 Mechanical 18. GTU 33.
36. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 11 Accident 15. GTO 5.
37. 10 Clay Young (USA) Pontiac Grand Prix Clay Young Racing 11 Suspension 4. AC 13. 1:27,179 
38. 11 Mark Porcaro (USA) Chevrolet Beretta
10 Accident 5. AC 19.
39. 87 Harry Gershenson (USA) Nissan 300ZX
9 Mechanical 19. GTU 35.
40. 81 Wayne Akers (USA) Ford Mustang
6 Mechanical 16. GTO 22.
41. 12 Del Russo Taylor (USA) Pontiac Firebird
4 Mechanical 17. GTO 8.
42. 20 Dan Osterholt (USA) Chevrolet Beretta Osterholt Racing 1 Rear end 6. AC 23.
43. 38 Roger Mandeville (USA) Mazda RX-7 Mandeville Auto Tech 0 Engine 18. GTO 7.

Winner's average speed: 116,6002 km/h
Fastest Lap: Pete Halsmer, 1:20,363 (135.030 kph) on lap 4.

Round 4: Summit Point Grand Prix (2h30m)
21st May 1989 - Summit Point: 302.557 km (3.210 km x 94 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 94 2:00:30,525  1. GTO 2.
2. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 94 2:00:34,515  2. GTO 4.
3. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 94
3. GTO 1. 1:11,032 
4. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 93
4. GTO 5.
5. 38 Roger Mandeville (USA) Mazda RX-7 Mandeville Auto Tech 90
5. GTO 8.
6. 0 Jerry Kuhn (USA) Chevrolet Camaro
88
6. GTO 9.
7. 74 George Robinson (USA) Pontiac Fiero Robinson Racing 88
1. GTU 17.
8. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 88
2. GTU 14.
9. 10 Clay Young (USA)
Chris Young (USA)		 Pontiac Grand Prix Clay Young Racing 87
1. AC 23.
10. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 86
3. GTU 24.
11. 28 Lance Stewart (USA)
Jeff Alkazian (USA)		 Mazda RX-7 Overton Autosport 85
4. GTU 22.
12. 73 Sam Range (USA)
Tommy Riggins (USA)		 Buick Somerset
84
2. AC 13. 1:17,978 
13. 93 Helmut Silberberger (USA) Mazda RX-7 Tyrolean Racing 84
5. GTU 27.
14. 76 John Morton (USA) Nissan 300ZX Cunningham Racing 83 Mechanical 7. GTO 6.
15. 20 Dan Osterholt (USA) Chevrolet Beretta Osterholt Racing 83
3. AC 26.
16. 18 David Yarmoluk (USA)
Jeremy Dale (CDN)		 Mazda RX-7 Tara Motorsports 83
6. GTU 20.
17. 82 Dick Greer (USA)
Mike Mees (USA)		 Mazda RX-7
83
7. GTU 28.
18. 77 Paul Lewis (USA) Mazda RX-7 Team Highball 82
8. GTU 25.
19. 75 Steve Millen (NZ) Nissan 300ZX Cunningham Racing 82
8. GTO 3.
20. 44 Ron Fariss (USA) Chevrolet Camaro
81
9. GTO 11.
21. 42 Chuck Coffey (USA)
Glenn Smith (USA)		 Mazda RX-7
79 Mechanical 9. GTU 29.
22. 37 Robert Borders (USA)
Alan Wells (USA)		 Chevrolet Beretta
79
4. AC 30.
23. 72 Jay Kjoller (USA)
Patrick Mooney (USA)		 Porsche 911
79
10. GTU 33.
24. 23 Linda Sharp (USA)
Dick Starita (USA)		 Oldsmobile Ciera
77
5. AC 32.
25. 91 Chester Vincentz (USA)
Mark Hutchins (USA)		 Porsche 944 Turbo Electrodyne Inc. 64 Steering 10. GTO 7.
26. 46 Adriano Abreu (DR) Nissan 280ZX Servicenter Abreu 58
11. GTU 31.
27. 11 Mark Porcaro (USA) Chevrolet Beretta
53 Mechanical 6. AC 19.
28. 32 Butch Leitzinger (USA) Nissan 300ZX Aldermann 50 Rear end 12. GTU 18.
29. 27 John Overton (USA) Mazda RX-7 Overton Autosport 37 Mechanical 13. GTU 16.
30. 17 Al Bacon (USA) Mazda RX-7 Al Bacon Perf 23 Gearbox 14. GTU 21.
31. 07 Joe Varde (USA) Dodge Daytona Full Time Racing 14 Mechanical 15. GTU 12. 1:17,737 
32. 71 Amos Johnson (USA) Mazda MX-6 Team Highball 12 Suspension 16. GTU 15.
33. 03 Buz McCall (USA) Chevrolet Camaro Skoal Bandit Racing 12 Mechanical 11. GTO 10.
34. 89 Ray Hendricks (USA) Porsche 911
8 Mechanical 17. GTU 34.

Winner's average speed: 150,6394 km/h
Fastest Lap: Pete Halsmer, 1:12.24 (160.399 kph) on lap 24.

Round 5: Mid Ohio 200 km
4th June 1989 - Mid Ohio: 200.846 km (3.862 km x 52 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 52 1:23:56,251  1. GTO 3.
2. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 52 1:24:11,288  2. GTO 5.
3. 76 John Morton (USA) Nissan 300ZX Cunningham Racing 52
3. GTO 4.
4. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 51
4. GTO 1. 1:26,152 
5. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 51
5. GTO 6.
6. 38 Roger Mandeville (USA) Mazda RX-7 Mandeville Auto Tech 50
6. GTO 9.
7. 71 Amos Johnson (USA) Mazda MX-6 GT Team Highball 50
1. GTU 12.
8. 45 John Hogdal (USA) Mazda RX-7 Redbird Racing 50
2. GTU 15.
9. 07 Joe Varde (USA) Dodge Daytona Full Time Racing 50
3. GTU 10. 1:33,266 
10. 90 Andy Petery (USA) Mercury Cougar XR-7
50
7. GTO 16.
11. 18 Jeremy Dale (CDN) Mazda RX-7 Tara Motorsports 50
4. GTU 17.
12. 74 George Robinson (USA) Pontiac Fiero Robinson Racing 49
5. GTU 19.
13. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 48
6. GTU 14.
14. 10 Clay Young (USA) Pontiac Grand Prix Clay Young Racing 48
1. AC 18.
15. 57 Reed Kryder (USA) Nissan 300ZX Kryderacing 48
7. GTU 24.
16. 77 Paul Lewis (USA) Mazda RX-7 Team Highball 48
8. GTU 25.
17. 91 Chester Vincentz (USA) Porsche 944 Turbo Electrodyne Inc. 47
8. GTO 8.
18. 72 Jay Kjoller (USA) Porsche 911
47
9. GTU 27.
19. 28 John Overton (USA) Mazda RX-7 Overton Autosport 47
10. GTU 26.
20. 42 Glenn Smith (USA) Mazda RX-7
46
11. GTU 28.
21. 17 Al Bacon (USA) Mazda MX-6 GT Al Bacon Perf 46
12. GTU 23.
22. 11 Mark Porcaro (USA) Chevrolet Beretta
46
2. AC 21.
23. 82 Dick Greer (USA)
Mike Mees (USA)		 Mazda RX-7
46
13. GTU 22.
24. 03 Jack Baldwin (USA) Chevrolet Camaro Skoal Bandit Racing 45 Mechanical 9. GTO 7.
25. 75 Steve Millen (NZ) Nissan 300ZX Cunningham Racing 41 Engine 10. GTO 2.
26. 26 Matt Mnich (USA) Mazda RX-7 Overton Autosport 41 Mechanical 14. GTU 20.
27. 27 Lance Stewart (USA) Mazda RX-7
34 Electrical 15. GTU 11.
28. 89 Bruce Jones (USA) Porsche 911
18 Engine 16. GTU 29.
29. 73 Sam Range (USA) Buick Somerset
7 Accident 3. AC 13. 1:34,617 

Winner's average speed: 143,568 km/h
Fastest Lap: Wally Dallenbach, Jr., 1:27.6 (158.730 kph) on lap 46

Round 6: Audi Quattro IMSA 500 km
25th June 1989 - Mosport Park (CDN): 498.630 km (3.957 km x 126 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 126 3:06:17,976  1. GTO 1. 1:18,732 
2. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 125 3:07:57,028 (Accident) 2. GTO 2.
3. 00 Jeremy Dale (CDN) Dodge Daytona Full Time Racing 116
1. GTU 8.
4. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 116
2. GTU 7. 1:27,463 
5. 71 Amos Johnson (USA)
Dan Robson (USA)		 Mazda MX-6 GT Team Highball 114
3. GTU 10.
6. 11 Mark Porcaro (USA)
Clay Young (USA)		 Chevrolet Beretta
113
1. AC 12. 1:28,685 
7. 38 Roger Mandeville (USA)
Kelly Marsh (USA)		 Mazda RX-7 Mandeville Auto Tech 113
3. GTO 6.
8. 57 Reed Kryder (USA)
Alistair Oag (USA)		 Nissan 300ZX Kryderacing 112
4. GTU 16.
9. 5 Hurley Haywood (USA)
Scott Goodyear (CDN)		 Audi 90 quattro Audi of America 109 Oil leak 4. GTO 4.
10. 20 Dan Osterholt (USA) Chevrolet Beretta Osterholt Racing 107
2. AC 19.
11. 28 Jeff Alkazian (USA)
Peter Cramer (D)		 Mazda RX-7 Overton Autosport 107
5. GTU 14.
12. 03 Buz McCall (USA)
Jack Baldwin (USA)		 Chevrolet Camaro Skoal Bandit Racing 99 Mechanical 5. GTO 5.
13. 37 Robert Borders (USA)
Alan Wells (USA)		 Chevrolet Beretta
93 Mechanical 3. AC 18.
14. 27 Lance Stewart (USA) Mazda RX-7 Overton Autosport 87 Mechanical 6. GTU 11.
15. 77 Paul Lewis (USA)
Juan Negron (PR)		 Mazda RX-7 Team Highball 81 Engine 7. GTU 15.
16. 49 Clint Welding (USA)
John Cleveland (USA)		 Pontiac Grand Prix
54 Mechanical 4. AC 20.
17. 07 Joe Varde (USA) Dodge Daytona Full Time Racing 35 Mechanical 8. GTU 9.
18. 82 Dick Greer (USA) Mazda RX-7
29 Oil leak 9. GTU 17.
19. 17 Al Bacon (USA) Mazda MX-6 GT Al Bacon Perf 27 Accident 10. GTU 21.
20. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 20 Steering 6. GTO 3.
21. 74 George Robinson (USA) Pontiac Fiero Robinson Racing 13 Engine 11. GTU 13.
22. 72 Patrick Mooney (USA) Porsche 911
1 Mechanical 12. GTU 22.

Winner's average speed: 160,59 km/h
Fastest Lap: Wally Dallenbach, Jr., 1m20.329 (177.351 kph)

Round 7: Miller High Life 500 km
16th July 1989 - Road America: 502.115 km (6.437 km x 78 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 83 Geoff Brabham (AUS)
Chip Robinson (USA)		 Nissan GTP ZX-T Electramotive Engineering 78 2:45:36,988  1. GTP 3. 1:56,287 
2. 60 Jan Lammers (NL)
Price Cobb (USA)		 Jaguar XJR-10 TWR 78 2:45:45,984  2. GTP 2. 1:55,970 
3. 61 John Nielsen (DK)
Davy Jones (USA)		 Jaguar XJR-9 TWR 78
3. GTP 1. 1:55,819 
4. 68 John Andretti (USA)
Bob Wollek (F)		 Porsche 962C Busby Racing 77
4. GTP 5. 2:01,370 
5. 98 Juan-Manuel Fangio II (RA)
Drake Olson (USA)		 Toyota 88C All American Racers 77
5. GTP 4. 1:58,759 
6. 33 Costas Los (GR) Spice SE89P Pontiac Firebird Spice Engineering 76
6. GTP 7. 2:02,989 
7. 30 Gianpiero Moretti (I)
Jean-Louis Ricci (F)		 Porsche 962C Momo/Gebhardt Racing 74
7. GTP 9. 2:04,467 
8. 10 John Hotchkis (USA)
Jim Adams (USA)		 Porsche 962 Hotchkis Racing 74
8. GTP 11. 0:00,000 
9. 67 Derek Bell (GB)
Steve Bren (ÜSA)		 Porsche 962C Busby Racing 73
9. GTP 10. 2:04,842 
10. 64 Jim Miller (USA)
Bob Earl (USA)		 Spice SE89P Chevrolet Jim Miller Racing 73
10. GTP 8. 2:03,559 
11. 7 Steve Millen (NZ) Nissan 300ZX Turbo Cunningham Racing 72
1. GTO 12. 2:09,777 
12. 5 Hurley Haywood (USA)
Scott Goodyear (CDN)		 Audi 90 quattro Audi of America 72
2. GTO 14. 2:11,110 
13. 4 Scott Schubot (USA) Spice SE88P Buick S & L Racing 69
1. Lights 15. 2:11,608 
14. 9 Tom Hessert (USA)
Charles Morgan (USA)		 Spice SE88P Buick Essex Racing 70
2. Lights 24. 2:16,779 
15. 11 Wally Dallenbach, Jr. (USA) Lincoln Mercury Cougar XR-7 Roush Racing 70
3. GTO 27. 2:18,821 
16. 02 Frank Everett (USA)
Parker Johnstone (USA)		 Spice - Pontiac Firebird Empire Motorsports 69
3. Lights 17. 2:13,883 
17. 79 Ferdinand de Lesseps (F)
Jay Cochran (USA)		 Spice - Pontiac Firebird Whitehall Motorsports 69
4. Lights 20. 2:15,717 
18. 36 John O'Steen (USA)
John Grooms (USA)		 Argo JM16 Mazda Erie Scientific 69
5. Lights 19. 2:15,497 
19. 90 Andy Petery (USA)
Craig Carter (USA)		 Lincoln Mercury Capri
67
4. GTO 21. 2:15,798 
20. 71 Amos Johnson (USA) Mazda MX-6 GT Team Highball 67
1. GTU 30. 2:22,777 
21. 95 Bob Leitzinger (USA)
Chuck Kurtz (USA)		 Nissan 240SX Leitzinger Racing 67
2. GTU 32. 2:23,608 
22. 40 Uli Bieri (CDN)
David Tennyson (CDN)		 Tiga GT286 Ferrari Bieri Racing 67
6. Lights 28. 2:21,288 
23. 27 Lance Stewart (USA)
John Overton (USA)		 Mazda RX-7 Overton Autosport 67
3. GTU 34. 2:24,487 
24. 45 John Hogdal (USA)
John Finger (USA)		 Mazda RX-7
65
4. GTU 35. 2:24,501 
25. 24 Max Schmidt (USA)
Jim Briody (USA)		 Argo JM19 Mazda
63
7. Lights 48. 2:50,163 
26. 72 Jay Kjoller (USA)
Patrick Mooney (USA)		 Porsche 911
63
5. GTU 44. 2:32,887 
27. 82 Dick Greer (USA)
Mike Mees (USA)		 Mazda RX-7
63
6. GTU 43. 2:31,075 
28. 57 Reed Kryder (USA) Nissan 300ZX Kryderacing 63
7. GTU 42. 2:30,908 
29. 28 Jeff Alkazian (USA)
Ron Cortez (USA)		 Mazda RX-7 Overton Autosport 61
8. GTU 39. 2:27,304 
30. 16 Pete Halsmer (USA) Lincoln Mercury Cougar XR-7 Roush Racing 60
5. GTO 16. 2:12,167 
31. 20 Dan Osterholt (USA) Chevrolet Beretta Osterholt Racing 60
1. AC 45. 2:34,374 
32. 38 Roger Mandeville (USA)
Kelly Marsh (USA)		 Mazda RX-7 Mandeville Auto Tech 59 Mechanical 6. GTO 26. 2:18,591 
33. 37 Robert Borders (USA)
Alan Wells (USA)
Carson Hurley (USA)		 Chevrolet Beretta
55 Mechanical 2. AC 40. 2:27,765 
34. 19 Bill Wolff (USA)
Jim Martin (USA)		 Tiga GT288 Buick Essex Racing 53 Electrics 8. Lights 25. 2:16,908 
35. 63 Jim Downing (USA)
Howard Katz (USA)		 Argo JM19 Mazda 107 Downing/Atlanta 53 Engine 9. Lights 23. 2:16,612 
36. 07 Jeremy Dale (CDN) Dodge Daytona Full Time Racing 53
9. GTU 31. 2:23,085 
37. 39 Jack Buchinger (USA)
Michael Guffey (USA)		 Mazda RX-7
47
10. GTU 46. 2:34,549 
38. 97 Ken Knott (USA)
Hendrik ten Cate (NL)		 Spice - Pontiac Firebird Whitehall Motorsports 43 Engine 10. Lights 22. 2:18,122 
39. 23 Linda Sharp (USA)
Dick Danielson (USA)		 Oldsmobile Ciera
38 Transmission 3. AC 47. 2:38,404 
40. 92 Mike Gagliardo (USA)
Tony Kester (USA)		 Lola T616 Mazda Gary Wonzer Racing 35 Mechanical 11. Lights 29. 2:21,288 
41. 29 Oma Kimbrough (USA)
John Vosburgh (USA)
Del Russo Taylor (USA)		 Chevrolet Camaro
29 Mechanical 7. GTO 37. 2:25,076 
42. 18 Clay Young (USA) Pontiac Grand Prix Clay Young Racing 22 Engine 4. AC 36. 2:24,532 
43. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 22 Piston 11. GTU 33. 2:24,999 
44. 77 Paul Lewis (USA) Mazda RX-7 Team Highball 20 Engine 12. GTU 41. 2:29,669 
45. 04 Hans-Joachim Stuck (D)
Walter Röhrl (D)		 Audi 90 quattro Audi of America 18 Accident 8. GTO 13. 2:10,295 
46. 41 Mark Porcaro (USA) Chevrolet Beretta
17 Mechanical 5. AC 38. 2:26,708 
47. 99 Willy T. Ribbs (USA)
Rocky Moran (USA)		 Eagle HF89 Toyota All American Racers 15 Mechanical 11. GTP 6. 2:02,478 
48. 03 Buz McCall (USA) Chevrolet Camaro Skoal Bandit Racing 1 Accident 9. GTO 18. 2:14,423 
DNQ 74 George Robinson (USA)
Bart Kendall (USA)		 Pontiac Fiero

Accident
GTU
0:00,000 
DNQ 78 Jacques Villeneuve (CDN)
Elliot Forbes-Robinson (USA)		 Lola T88/10 Chevrolet Corvette GTP 01 Peerless Racing
Engine
GTP 50. 0:00,000 
DNQ 80 Martino Finotto (I)
David Loring (USA)		 Spice SE88P Ferrari

Accident
Lights
0:00,000 

Winner's average speed: 181,9074 km/h
Fastest Lap: Geoff Brabham, 1m58.379 (195.765 kph) on lap 72

Round 8: Purolator IMSA Race (1h30m)
30th July 1989 - Portland: 252.715 km (3.082 km x 82 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 82 1:30:28,052  1. GTO 1. 1:02,863 
2. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 82 1:30:29,756  2. GTO 5.
3. 75 Steve Millen (NZ) Nissan 300ZX Turbo Cunningham Racing 82
3. GTO 2.
4. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 81
4. GTO 6.
5. 76 John Morton (USA) Nissan 300ZX Turbo Cunningham Racing 80
5. GTO 4.
6. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 77
1. GTU 14.
7. 17 Al Bacon (USA) Mazda MX-6 Al Bacon Perf 77
2. GTU 18.
8. 27 Lance Stewart (USA) Mazda RX-7 Overton Autosport 77
3. GTU 20.
9. 74 George Robinson (USA) Pontiac Fiero Huffaker Racing 76
4. GTU 15.
10. 57 Monte Shelton (USA) Porsche 911
75
5. GTU 17.
11. 71 Amos Johnson (USA) Mazda MX-6 Team Highball 74
6. GTU 13.
12. 28 Jeff Alkazian (USA) Mazda RX-7 Overton Autosport 74
7. GTU 26.
13. 77 Paul Lewis (USA) Mazda RX-7 Team Highball 73
8. GTU 22.
14. 04 Casey Mollett (USA) Ford Mustang
73
6. GTO 9.
15. 48 Doug Barnhold (USA) Nissan 300ZX
71
9. GTU 25.
16. 97 Walter Benson (USA) Pontiac Firebird
69
7. GTO 24.
17. 78 John Daley (USA) Mazda RX-7
66
10. GTU 27.
18. 38 Roger Mandeville (USA) Mazda RX-7 Mandeville Auto Tech 62
8. GTO 10.
19. 07 Jeremy Dale (CDN) Dodge Daytona Full Time Racing 58 Steering 11. GTU 12. 1:08,127 
20. 2 Steve Dymand (USA) Chevrolet Corvette
57 Mechanical 9. GTO 11.
21. 09 Barry Allan (USA) Mazda RX-7
47 Mechanical 12. GTU 23.
22. 83 Vic Manuelli (USA) Mercury Capri
47 Mechanical 10. GTO 19.
23. 45 Brian Wold (USA) Pontiac Firebird
43 Mechanical 11. GTO 21.
24. 7 Richard Gottlieb (USA) Chevrolet Camaro
40 Mechanical 12. GTO 7.
25. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 33 Mechanical 13. GTO 3.
26. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 30 Mechanical 13. GTU 16.
27. 40 Tom Moody (USA) Chevrolet Corvette
5 Mechanical 14. GTO 8.

Winner's average speed: 167,6068 km/h
Fastest Lap: Pete Halsmer, 1m04.43 (172.198 kph) on lap 9

Round 9: Topeka Race (2 hours)
12th August 1989 - Topeka: 257.495 km (4.023 km x 64 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 64 2:01:25,175  1. GTO 2.
2. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 64 2:01:28,817  2. GTO 3.
3. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 64
3. GTO 5.
4. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 64
4. GTO 8.
5. 76 John Morton (USA) Nissan 300ZX Turbo Cunningham Racing 63
5. GTO 4.
6. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 62
1. GTU 9. 1:47,180 
7. 27 Lance Stewart (USA) Mazda RX-7 Overton Autosport 61
2. GTU 10.
8. 17 Al Bacon (USA) Mazda MX-6 Al Bacon Perf 61
3. GTU 12.
9. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 61
4. GTU 14.
10. 99 Tommy Riggins (USA) Dodge Daytona Full Time Racing 61
5. GTU 13.
11. 74 George Robinson (USA) Pontiac Fiero Huffaker Racing 60
6. GTU 16.
12. 71 Amos Johnson (USA) Mazda MX-6 Team Highball 60
7. GTU 15.
13. 38 Roger Mandeville (USA) Mazda RX-7 Mandeville Auto Tech 59
6. GTO 7.
14. 75 Steve Millen (NZ)
Geoff Brabham (AUS)		 Nissan 300ZX Turbo Cunningham Racing 58 Engine 7. GTO 1. 1:40,668 
15. 57 Reed Kryder (USA) Nissan 300ZX Kryderacing 58
8. GTU 18.
16. 15 Eduardo Pellerano (DR) Mazda RX-7
58
9. GTU 21.
17. 82 Dick Greer (USA) Mazda RX-7
57
10. GTU 19.
18. 72 Jay Kjoller (USA)
Patrick Mooney (USA)		 Porsche 911
55
11. GTU 20.
19. 28 Peter Cramer (D) Mazda RX-7 Overton Autosport 32
12. GTU 17.
20. 03 Jack Baldwin (USA) Chevrolet Camaro Skoal Bandit Racing 20 Broken axle 8. GTO 6.
21. 07 Jeremy Dale (CDN) Dodge Daytona Full Time Racing 18 Mechanical 13. GTU 11.

Winner's average speed: 127,2428 km/h
Fastest Lap: Hurley Haywood, 1m41.6 (142.559 kph) on lap 52

Round 10: San Antonio Grand Prix (1 hour)
3rd September 1989 - San Antonio: 102.129 km (2.688 km x 38 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 38 1:00:25,742  1. GTO 4.
2. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 38 1:00:27,060  2. GTO 2.
3. 75 Steve Millen (NZ) Nissan 300ZX Turbo Cunningham Racing 38
3. GTO 3.
4. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 38
4. GTO 5.
5. 76 John Morton (USA) Nissan 300ZX Turbo Cunningham Racing 38
5. GTO 6.
6. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 38
1. GTU 8.
7. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 38
2. GTU 12.
8. 17 Al Bacon (USA) Mazda MX-6 Al Bacon Perf 38
3. GTU 15.
9. 27 Lance Stewart (USA) Mazda RX-7 Overton Autosport 38
4. GTU 7. 1:13,630 
10. 71 Amos Johnson (USA) Mazda MX-6 Team Highball 38
5. GTU 13.
11. 98 Phil Currin (USA) Chevrolet Camaro
37
6. GTO 24.
12. 74 George Robinson (USA) Pontiac Fiero Huffaker Racing 37
6. GTU 10.
13. 13 Mike Sheehan (USA) Chevrolet Camaro
37
7. GTO 20.
14. 57 Reed Kryder (USA) Nissan 300ZX Kryderacing 37
7. GTU 18.
15. 99 Jack Baldwin (USA) Dodge Daytona Full Time Racing 36
8. GTU 11.
16. 82 Dick Greer (USA) Mazda RX-7
36
9. GTU 19.
17. 36 Jeff Elghanayan (USA) Ford RS 200
27 Accident 8. GTO 16.
18. 03 Buz McCall (USA) Chevrolet Camaro Skoal Bandit Racing 26 Mechanical 9. GTO 21.
19. 12 Del Russo Taylor (USA) Pontiac Firebird
20 Mechanical 10. GTO 23.
20. 07 Jeremy Dale (CDN) Dodge Daytona Full Time Racing 14 Mechanical 10. GTU 9.
21. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 13 Engine 11. GTO 1. 1:07,507 
22. 31 Anthony Puleo (USA) Chevrolet Camaro Puleo Racing 13 Mechanical 12. GTO 17.
23. 14 Jim Pallas (USA) Chevrolet Camaro
11 Mechanical 13. GTO 14.
24. 7 Troy Waldron (USA) Buick Skylark
1 Accident 14. GTO 22.

Winner's average speed: 101,4032 km/h
Fastest Lap: Hans-Joachim Stuck, 1m09.97 (140.081 kph) on lap 1

Round 11: Sears Point 200 km
10th September 1989 - Sears Point: 203.019 km (4.060 km x 50 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 50 1:29:30,123  1. GTO 1. 1:33,985 
2. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 50 1:29:34,125  2. GTO 2.
3. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 50
3. GTO 4.
4. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 50
4. GTO 3.
5. 07 Jeremy Dale (CDN) Dodge Daytona Full Time Racing 49
1. GTU 7. 1:37,880 
6. 76 John Morton (USA) Nissan 300ZX Turbo Cunningham Racing 49
5. GTO 6.
7. 08 Dominic Dobson (USA) Pontiac Fiero
49
6. GTO 8.
8. 27 Lance Stewart (USA) Mazda RX-7 Overton Autosport 48
2. GTU 19.
9. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 48
3. GTU 15.
10. 32 Steve Anderson (USA) Pontiac TransAm
48
7. GTO 14.
11. 96 Butch Leitzinger (USA) Nissan 300ZX Leitzinger Racing 48
4. GTU 16.
12. 17 Al Bacon (USA) Mazda MX-6 Al Bacon Perf 48
5. GTU 17.
13. 45 Brian Wold (USA) Pontiac Firebird
48
8. GTO 30.
14. 48 Frank Honsowetz (USA) Nissan 300ZX
48
6. GTU 22.
15. 40 Tom Moody (USA) Chevrolet Corvette
47
9. GTO 21.
16. 77 Paul Lewis (USA) Mazda RX-7 Team Highball 47
7. GTU 24.
17. 13 Mike Sheehan (USA) Chevrolet Camaro
47
10. GTO 25.
18. 24 Troy Rowland (USA) Mercury Merkur
45
8. GTU 28.
19. 74 George Robinson (USA) Pontiac Fiero Huffaker Racing 41 Mechanical 9. GTU 20.
20. 20 Bill Lester (USA) Chevrolet Camaro
38
11. GTO 9.
21. 71 Amos Johnson (USA) Mazda MX-6 Team Highball 37 Mechanical 10. GTU 12.
22. 28 Sean Scott (USA) Mazda RX-7 Overton Autosport 36
11. GTU 29.
23. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 30 Accident 12. GTU 11.
24. 75 Steve Millen (NZ) Nissan 300ZX Turbo Cunningham Racing 29 Steering 12. GTO 5.
25. 44 Chuck McConnell (USA) Chevrolet Camaro
21 Mechanical 13. GTO 23.
26. 97 Walter Benson (USA) Pontiac Firebird
17 Mechanical 14. GTO 27.
27. 87 Steve Petty (USA) Chevrolet Camaro
7 Accident 15. GTO 10.
28. 99 Jack Baldwin (USA) Dodge Daytona Full Time Racing 7 Engine 13. GTU 13.
29. 92 Rick Weldon (USA) Mazda RX-7
5 Mechanical 14. GTU 26.
30. 2 Steve Dymand (USA) Chevrolet Corvette
0 Mechanical 16. GTO 18.
DSQ 41 Mat Lowrance (USA) Porsche 911



GTU

Winner's average speed: 136,099 km/h
Fastest Lap: Hans-Joachim Stuck, 1:35.514 (153.037 kph) on lap 42

Round 12: Kodiak Coper 500 km
24th September 1989 - Watkins Glen: 499.997 km (5.435 km x 92 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 4 Hans-Joachim Stuck (D)
Walter Röhrl (D)		 Audi 90 quattro Audi of America 92 2:53:00,474  1. GTO 1. 2:00,712 
2. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 92 2:53:20,881  2. GTO 3.
3. 75 Steve Millen (NZ) Nissan 300ZX-Turbo Cunningham Racing 91
3. GTO 5.
4. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 90
4. GTO 4.
5. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 88
5. GTO 2.
6. 17 Al Bacon (USA) Mazda MX-6 Al Bacon Perf 84
1. GTU 21.
7. 77 Peter Uria (USA)
Amos Johnson (USA)		 Mazda RX-7 Team Highball 83
2. GTU 10.
8. 93 Helmut Silberberger (USA) Mazda RX-7 Tyrolean Racing 82
3. GTU 18.
9. 91 Chester Vincentz (USA)
John Wood (USA)		 Porsche 944 Turbo Electrodyne Inc. 81
6. GTO 14.
10. 82 Dick Greer (USA) Mazda RX-7
79
4. GTU 28.
11. 81 Ken Bupp (USA)
Robert Peters (CDN)		 Chevrolet Camaro
78
7. GTO 22.
12. 3 Robert Borders (USA)
Tom Ciccone (USA)		 Chevrolet Beretta
77
1. AC 26.
13. 57 Reed Kryder (USA)
Henry Camferdam (USA)		 Nissan 300ZX Kryderacing 77
5. GTU 19.
14. 49 Clint Welding (USA)
Phil Kelly (USA)		 Pontiac Grand Prix
76
2. AC 25.
15. 07 Jeremy Dale (CDN) Dodge Daytona Full Time Racing 73
6. GTU 9. 2:18,638 
16. 74 George Robinson (USA)
Johnny Unser (USA)		 Pontiac Fiero Huffaker Racing 72
7. GTU 11.
17. 84 Kim Mason (USA)
Jerry Thompson (USA)		 Chevrolet Corvette Mason Racing 72
8. GTO 36.
18. 58 Tom Forgione (USA) Oldsmobile Toronado
72
3. AC 35.
19. 70 Bill Weston (USA)
Norm Dupont (USA)		 Mazda RX-7
71
8. GTU 20.
20. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 67 Mechanical 9. GTU 12.
21. 31 Anthony Puleo (USA) Chevrolet Camaro Puleo Racing 66
9. GTO 33.
22. 03 Buz McCall (USA)
Jack Baldwin (USA)		 Chevrolet Camaro Skoal Bandit Racing 65 Transmission 10. GTO 17.
23. 10 Clay Young (USA) Pontiac Grand Prix Clay Young Racing 63
4. AC 24.
24. 25 Dale Kreider (USA)
Jack Boxstrom (CDN)		 Buick Somerset
59
5. AC 31.
25. 38 Roger Mandeville (USA) Mazda MX-6 Mazda Motorsports 41 Mechanical 10. GTU 30.
26. 29 Robert Kahn (USA)
Oma Kimbrough (USA)		 Chevrolet Camaro Overbagh Motor Racing 40 Mechanical 11. GTO 32.
27. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 37 Ignition 11. GTU 16.
28. 20 Dan Osterholt (USA) Chevrolet Beretta Osterholt Racing 30 Mechanical 6. AC 15. 2:25,089 
29. 11 Mark Porcaro (USA) Chevrolet Beretta
25 Engine 7. AC 27.
30. 89 Ray Hendricks (USA) Porsche 911
21 Suspension 12. GTU 29.
31. 76 John Morton (USA) Nissan 300ZX-Turbo Cunningham Racing 19 Mechanical 12. GTO 7.
32. 42 Chuck Coffey (USA) Mazda RX-7
17 Mechanical 13. GTU 23.
33. 90 Andy Petery (USA) Mercury Cougar
11 Mechanical 13. GTO 6.
34. 48 David Yarmoluk (USA) Mazda RX-7 Tara Motorsports 10 Mechanical 14. GTU 34.
35. 71 Lance Stewart (USA) Mazda MX-6 Team Highball 1 Mechanical 15. GTU 13.
36. 39 Elliot Forbes-Robinson (USA) Mazda RX-7 Mazda Motorsports 0 Accident 14. GTO 8.

Winner's average speed: 173,402 km/h
Fastest Lap: Hans-Joachim Stuck, 1:47.15 (182.595 kph) on lap 48

Round 13: Lime Rock (2 hour)
1st October 1989 - Lime Rock: 322.561 km (2.462 km x 131 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 131 2:00:24,132  1. GTO 2.
2. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 131 2:00:34,092  2. GTO 1. 0:50,889 
3. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 131
3. GTO 4.
4. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 131
4. GTO 3.
5. 75 Steve Millen (NZ) Nissan 300ZX-Turbo Cunningham Racing 129
5. GTO 6.
6. 76 John Morton (USA) Nissan 300ZX-Turbo Cunningham Racing 129
6. GTO 5.
7. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 125
1. GTU 10.
8. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 125
2. GTU 9.
9. 71 Amos Johnson (USA) Mazda MX-6 Team Highball 125
3. GTU 16.
10. 38 Roger Mandeville (USA) Mazda MX-6 Mazda Motorsports 124
4. GTU 11.
11. 07 Jeremy Dale (CDN) Dodge Daytona Full Time Racing 123
5. GTU 8. 0:54,000 
12. 19 Peter Andrighetti (USA)
Bob Hebert (USA)		 Chevrolet Corvette
123
7. GTO 12.
13. 77 Lance Stewart (USA) Mazda RX-7 Team Highball 123
6. GTU 14.
14. 74 George Robinson (USA) Pontiac Fiero Huffaker Racing 121
7. GTU 20.
15. 10 Clay Young (USA) Pontiac Grand Prix Clay Young Racing 120
1. AC 19. 0:57,510 
16. 17 Al Bacon (USA) Mazda MX-6 Al Bacon Perf 120
8. GTU 17.
17. 87 Peter Dus (USA)
Kermit Upton (USA)		 Chevrolet Camaro
120
8. GTO 32.
18. 93 Helmut Silberberger (USA) Mazda RX-7 Tyrolean Racing 118
9. GTU 33.
19. 25 Dale Kreider (USA)
Jack Boxstrom (CDN)		 Buick Somerset
112
2. AC 28.
20. 58 Tom Forgione (USA) Oldsmobile Toronado
111
3. AC 29.
21. 18 David Yarmoluk (USA) Mazda RX-7 Tara Motorsports 107 Mechanical 10. GTU 22.
22. 42 Chuck Coffey (USA)
Glenn Smith (USA)		 Mazda RX-7
105
11. GTU 30.
23. 57 Reed Kryder (USA) Nissan 300ZX Kryderacing 102 Mechanical 12. GTU 21.
24. 20 Dan Osterholt (USA) Chevrolet Beretta Osterholt Racing 92 Electrical 4. AC 31.
25. 70 Norm Dupont (USA)
Mick Robinson (USA)		 Mazda RX-7
67 Mechanical 13. GTU 27.
26. 32 George Alderman (USA)
Paul Alderman (USA)		 Nissan 300ZX Aldermann 50 Engine 14. GTU 25.
27. 90 Andy Petery (USA) Mercury Cougar
39 Engine 9. GTO 13.
28. 15 Eduardo Pellerano (DR) Mazda RX-7
32 Suspension 15. GTU 18.
29. 91 Chester Vincentz (USA) Porsche 944 Turbo Electrodyne Inc. 31 Mechanical 10. GTO 7.
30. 11 Mark Porcaro (USA) Chevrolet Beretta
15 Transmission 5. AC 23.
31. 89 Ray Hendricks (USA) Porsche 911
6 Mechanical 16. GTU 26.
32. 3 Robert Borders (USA) Chevrolet Beretta
6 Mechanical 6. AC 24.
33. 99 Tommy Riggins (USA) Dodge Daytona Full Time Racing 0 Accident 17. GTU 15.

Winner's average speed: 160,741 km/h
Fastest Lap: Hans-Joachim Stuck, 0:51.34 (172.657 kph) on lap 85

Round 14: Laguna Seca (1 hour)
15th October 1989 - Laguna Seca: 146.087 km (3.563 km x 41 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 41 1:00:53,181  1. GTO 1. 1:24,844 
2. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 41 1:00:53,950  2. GTO 7.
3. 60 Jean Alesi (F) Ferrari F40-LM 79890 Ferrari France, Jean Sage 41
3. GTO 2.
4. 75 Steve Millen (NZ) Nissan 300ZX Turbo Cunningham Racing 41
4. GTO 4.
5. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 41
5. GTO 3.
6. 76 John Morton (USA) Nissan 300ZX Turbo Cunningham Racing 41
6. GTO 6.
7. 07 Jeremy Dale (CDN) Dodge Daytona Full Time Racing 39
1. GTU 8. 1:30,874 
8. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 39
2. GTU 9.
9. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 39
3. GTU 15.
10. 17 Al Bacon (USA) Mazda MX-6 Al Bacon Perf 39
4. GTU 12.
11. 27 Lance Stewart (USA) Mazda RX-7 Overton Autosport 39
5. GTU 10.
12. 38 Roger Mandeville (USA) Mazda MX-6 Mazda Motorsports 39
6. GTU 13.
13. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 38 Mechanical 7. GTO 5.
14. 2 Steve Dymand (USA) Chevrolet Corvette
38
8. GTO 18.
15. 28 Michael Lewis (USA) Mazda RX-7 Overton Autosport 38
7. GTU 17.
16. 48 Doug Barnhold (USA) Nissan 300ZX
37
8. GTU 20.
17. 77 Paul Lewis (USA) Mazda RX-7 Team Highball 36
9. GTU 21.
18. 82 Dick Greer (USA) Mazda RX-7
36
10. GTU 24.
19. 3 Jon Longmire (USA) Porsche 911
36
11. GTU 23.
20. 97 Walter Benson (USA) Pontiac Firebird
35
9. GTO 29.
21. 0 Andrew McDowell (AUS) Chevrolet Camaro
34
10. GTO 26.
22. 74 George Robinson (USA) Pontiac Fiero Huffaker Racing 27
12. GTU 14.
23. 85 Don Reynolds (USA) Nissan 240SX
24
13. GTU 19.
24. 78 John Daley (USA) Mazda RX-7
10 Mechanical 14. GTU 25.
25. 34 Dan Gallant (USA) Pontiac Firebird
7 Mechanical 11. GTO 22.
26. 88 Mike Henderson (USA) Mazda RX-7
6 Cooling 15. GTU 27.
27. 13 Mike Sheehan (USA) Chevrolet Camaro
5 Suspension 12. GTO 16.
28. 71 Amos Johnson (USA) Mazda MX-6 Team Highball 3 Suspension 16. GTU 11.
29. 83 Vic Manuelli (USA) Mercury Capri
1 Mechanical 13. GTO 28.

Winner's average speed: 143,9606 km/h
Fastest Lap: Hans-Joachim Stuck, 1:26.529 (148.240 kph) on lap 12

Round 15: Chevron 1 hour
22nd October 1989 - Del Mar: 128.748 km (2.575 km x 50 laps)

Pos. No. Driver / Nationality Car Entrant Laps Time/retired Pos. Group Pos. Practice
1. 9 Wally Dallenbach, Jr. (USA) Mercury Cougar XR-7 Roush Racing 50 1:38:19,700  1. GTO 2.
2. 6 Pete Halsmer (USA) Mercury Cougar XR-7 Roush Racing 50 1:38:29,789  2. GTO 4.
3. 75 Steve Millen (NZ) Nissan 300ZX Turbo Cunningham Racing 50
3. GTO 3.
4. 76 John Morton (USA) Nissan 300ZX Turbo Cunningham Racing 50
4. GTO 6.
5. 07 Jeremy Dale (CDN) Dodge Daytona Full Time Racing 48
1. GTU 8. 1:13,923 
6. 00 Kal Showket (USA) Dodge Daytona Full Time Racing 47
2. GTU 10.
7. 17 Al Bacon (USA) Mazda MX-6 Al Bacon Perf 47
3. GTU 9.
8. 38 Roger Mandeville (USA) Mazda MX-6 Mazda Motorsports 47
4. GTU 14.
9. 71 Amos Johnson (USA) Mazda MX-6 Team Highball 47
5. GTU 12.
10. 27 Lance Stewart (USA) Mazda RX-7 Overton Autosport 46
6. GTU 15.
11. 85 Don Reynolds (USA) Nissan 240SX
46
7. GTU 16.
12. 2 Steve Dymand (USA) Chevrolet Corvette
45
5. GTO 28.
13. 13 Mike Sheehan (USA) Chevrolet Camaro
45
6. GTO 18.
14. 96 Chuck Kendall (USA) Mercury Capri Kendall Racing 45
7. GTO 21.
15. 48 Frank Honsowetz (USA) Nissan 300ZX
45
8. GTU 17.
16. 77 Paul Lewis (USA) Mazda RX-7 Team Highball 43
9. GTU 20.
17. 49 Greg Helms (USA) Chevrolet Camaro
43
8. GTO 27.
18. 28 Michael Lewis (USA) Mazda RX-7 Overton Autosport 42
10. GTU 19.
19. 82 Dick Greer (USA) Mazda RX-7
40
11. GTU 26.
20. 83 Vic Manuelli (USA) Mercury Capri
38
9. GTO 30.
21. 97 Walter Benson (USA) Pontiac Firebird
35 Accident 10. GTO 24.
22. 74 George Robinson (USA) Pontiac Fiero Huffaker Racing 34 Accident 12. GTU 13.
23. 0 Andrew McDowell (AUS) Chevrolet Camaro
33
11. GTO 25.
24. 95 Bob Leitzinger (USA) Nissan 240SX Leitzinger Racing 30 Accident 13. GTU 11.
25. 78 John Daley (USA) Mazda RX-7
28 Mechanical 14. GTU 23.
26. 4 Hans-Joachim Stuck (D) Audi 90 quattro Audi of America 25 Engine 12. GTO 1. 1:08,835 
27. 5 Hurley Haywood (USA) Audi 90 quattro Audi of America 24 Mechanical 13. GTO 5.
28. 60 Jean-Pierre Jabouille (F) Ferrari F40-LM 79890 Ferrari France 18 Mechanical 14. GTO 7.
29. 40 Bob Patch (USA) Chevrolet Corvette
4 Mechanical 15. GTO 29.
30. 88 Mike Henderson (USA) Mazda RX-7
3 Mechanical 15. GTU 22.

Winner's average speed: 127,3957 km/h
Fastest Lap: Wally Dallenbach, Jr., 1:10.77 (130.985 kph) on lap 15