| series | Champcar complete |
| team | Irv Orth Enterprises |
| year | race | car | entry | driver | start | finish | chassis | engine | laps led | * | |
| 1969 | Phoenix II | 75 | County of Marin | Ed Marshall |  | DNS | Huffaker 66 [c] | Chevy 320 V8 | |||
| 1969 | Riverside | 75 | County of Marin | Ed Marshall | | 26 | 24 | Huffaker 66 [c] | Chevy 320 V8 | ||
| 1970 | Sears Point | 75 | Irv Orth Enterprises | Ed Marshall | | 25 | 26 | Huffaker 66 [c] | Chevy 320 V8 |
3 entries
