1989 Seattle/Tacoma Twin 100
Race 1
Seattle International Raceway
2.25 Mile Road Course
28 Laps/63 Miles
August 19, 1989
| Finish | Start | Driver | Car # | Sponsor/Name | Chassis | Engine | Laps | Status | Points |
| 1 | 1 | Hiro Matsushita | 0 | Panasonic | Swift DB-4 | X | 28 | 0:37:29.740 | 20 |
| 2 | 17 | Bob Lobenberg | 12 | Mike Demski/Rick Cole Auctions | Swift DB-4 | X | 28 | 0:37:30.965 | 16 |
| 3 | 3 | Joe Sposato | 28 | Hoechst Celanese | Swift DB-4 | X | 28 | Finished | 14 |
| 4 | 7 | Sandy Dells | 70 | Starling | Swift DB-4 | X | 28 | Finished | 12 |
| 5 | 8 | Riley Hopkins | 89 | Hopkins International Screen | Ralt RT-4 | X | 28 | Finished | 11 |
| 6 | 6 | David Diem | 4 | DMR Pro Mark | Swift DB-4 | X | 28 | Finished | 10 |
| 7 | 12 | Lee Shepardson | 11 | Northstar Ice Equipment | Ralt RT-4 | X | 27 | Flagged | 9 |
| 8 | 14 | John Wink | 41 | Trimline/3M | Ralt RT-4 | X | 27 | Flagged | 8 |
| 9 | 10 | Al Whitman | X | Whitman Commodities | Ralt RT-4 | X | 27 | Flagged | 7 |
| 10 | 19 | David Trevisan | X | X | Ralt RT-4 | X | 25 | Flagged | 6 |
| 11 | 5 | Rusty Scott | 50 | Rocky Mountain Bank Note | Swift DB-4 | X | 20 | Fuel pump | 5 |
| 12 | 4 | Paet Hidalgo | 6 | Worldmark/Ralph's Radio | Swift DB-4 | X | 20 | Flagged | 4 |
| 13 | 15 | Ron Householder | X | X | Ralt RT-4 | X | 17 | Did not finish | 3 |
| 14 | 13 | James Blackwell | X | X | Argo JM11 | X | 17 | Suspension | 2 |
| 15 | 9 | Ken Rodrigues | X | P1 Racing | Swift DB-4 | X | 16 | Engine | 1 |
| 16 | 16 | Mike Bledsoe | X | X | Ralt RT-4 | X | 7 | Clutch | |
| -- | 2 | Mark Dismore | 20 | Comet Kart Sales | Swift DB-4 | X | -- | DNS, fire | |
| -- | 11 | Ted Titmas | X | Auto Dialysis Systems | Swift DB-4 | X | -- | DNS, ignition | |
| -- | 18 | Tom Hunter | 10 | Loyning Engines | Reynard 89H | X | -- | DNS, engine |
B Class Results
| Finish | Start | Driver | Car # | Sponsor/Name | Chassis | Engine | Laps | Status | Points |
| 1 | 1 | Riley Hopkins | 89 | Hopkins International Screen | Ralt RT-4 | X | 28 | Finished | 11 |
| 2 | 3 | Lee Shepardson | 11 | Northstar Ice Equipment | Ralt RT-4 | X | 27 | Flagged | 9 |
| 3 | 5 | John Wink | 41 | Trimline/3M | Ralt RT-4 | X | 27 | Flagged | 8 |
| 4 | 2 | Al Whitman | X | Whitman Commodities | Ralt RT-4 | X | 27 | Flagged | 7 |
| 5 | 8 | David Trevisan | X | X | Ralt RT-4 | X | 25 | Flagged | 6 |
| 6 | 6 | Ron Householder | X | X | Ralt RT-4 | X | 17 | Did not finish | 3 |
| 7 | 4 | James Blackwell | X | X | Argo JM11 | X | 17 | Suspension | 2 |
| 8 | 7 | Mike Bledsoe | X | X | Ralt RT-4 | X | 7 | Clutch |