| 11.5.1958 | SCCA Regional Tracy [FM+GM+HM] | 46 | | Jim Hughes | James C. McCandless | 6th |
| 11.5.1958 | Hawaii [S1.6] | 52 | | Cal Niday | John Hoogs | 10th |
| 15.5.1958 | Eläintarhanajo | 1 | | Holger Laine | | 11th |
| 18.5.1958 | SCCA National Cumberland [GM+HM] | 2 | #323 | M. R. J. Wyllie | Margaret J. Wyllie | ?th |
| 18.5.1958 | Preliminary Cumberland [Ladies] | 2 | #323 | Margaret Wyllie | Margaret J. Wyllie | 2nd |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 27 | | Alex McMillan | A. McMillan | DNQ |
| 26.5.1958 | NSCC Mallory Park [S1.5] | 28 | | David Brough | Team Sapphire | raced |
| 31.5.1958 | SCCA National Bridgehampton [FM+GM] | 8 | #275 | Charles Moran | | 10th |
| 31.5.1958 | Preliminary Santa Barbara [Modified 1.5] | 21 | | Byron J. Snow, Jr. | Daniel Hernandez | DNA |
| 1.6.1958 | Santa Barbara [FM+GM+HM] | 21 | | Byron J. Snow, Jr. | Daniel Hernandez | DNA |
| 15.6.1958 | SCCA Regional Laguna Seca [FM+GM+FIII] | 24 | | Dan Hernandez | | 8th |
| 15.6.1958 | SCCA Regional Laguna Seca [FM+GM+FIII] | 35 | | John P. Young | | 11th |
| 15.6.1958 | SCCA Regional Laguna Seca [FM+GM+FIII] | 87 | | Paul Nau | | 4th |
| 15.6.1958 | Opatija [GT1.3] | | | Charles Vögele | | 2nd |
| 22.6.1958 | SCCA National Road America [EM+FM+GM] | 1 | | J. C. Kilburn | John C. Kilburn | 5th |
| 22.6.1958 | SCCA National Road America [EM+FM+GM] | 2 | #323 | Margaret Wyllie | Marg. J. Wyllie | DNA |
| 22.6.1958 | SCCA National Road America [EM+FM+GM] | 68 | | Bill Bowman | W. S. Bowman | 17th |
| 5.7.1958 | SCCA National Lime Rock [DP+GM] | 49 | | Thomas Scatchard | | 13th |
| 6.7.1958 | SCCA Regional Vaca Valley [FM+GM+HM] | 21 | | Dan Hernandez | Dan Hernandez | 12th |
| 6.7.1958 | SCCA Regional Vaca Valley [FM+GM+HM] | 87 | | Paul Nau | | 5th |
| 6.7.1958 | Hawaii [S1.6 Heat 2] | | | Cal Niday | | 3rd |
| 12.7.1958 | Preliminary Traverse City [Ladies] | 2 | #323 | Margaret Wyllie | | 2nd |
| 13.7.1958 | Traverse City [S1.5] | 2 | #323 | Margaret Wyllie | | 3rd |
| 13.7.1958 | Traverse City [Main] | 2 | #323 | M. R. J. Wyllie | | 1st |
| 19.7.1958 | Berwick [GM+HM] | 78 | | Thomas Scatchard | | 3rd |
| 27.7.1958 | Trophée d'Auvergne | 48 | | Charles Vögele | | DNA |
| 3.8.1958 | SCCA Regional Shelton [S1.5] | 7 | | Harry Cross | | DNA |
| 3.8.1958 | SCCA Regional Shelton [S1.5] | 29 | | Pat Pigott | | 1st |
| 3.8.1958 | SCCA Regional Minden [FM+GM+HM] | 35 | | John P. Young | John P. Young | DNA |
| 3.8.1958 | SCCA Regional Shelton [S1.5] | 87 | | Paul Nau | | DNA |
| 3.8.1958 | SCCA Regional Shelton [S+1.5] | | | Pat Pigott | | 5th |
| 4.8.1958 | NSCC Mallory Park [S1.5] | 44 | | David Brough | Team Sapphire | DNA |
| 17.8.1958 | Zeltweg [GT1.3] | 67 | | Charles Vögele | Charles Vögele | 1st |
| 17.8.1958 | Zeltweg [Sports] | 119 | | Colin Murray | Colin Murray | DNA |
| 30.8.1958 | NSCC Silverstone [Formula Libre Heat 1] | 19 | | David Brough | Team Sapphire | DNA |
| 30.8.1958 | NSCC Silverstone [S1.1 Heat 1] | 19 | | David Brough | Team Sapphire | DNA |
| 31.8.1958 | SCCA Regional Mansfield [CM+DM+EM+FM+GM+UR] | 31 | | John Goans | Dave Kiser | DNA |
| 31.8.1958 | Preliminary Mansfield [FM+GM+HM+FIII] | 31 | | John Goans | Dave Kiser | DNA |
| 31.8.1958 | Deer Park [FM+GM+HM] | | | Pat Pigott | | 2nd |
| 7.9.1958 | 500 mile Road America | 2 | #323 | Wyllie / Wyllie | | DNF |
| 7.9.1958 | 500 mile Road America | 68 | | Bill Bowman | | 24th |
| 7.9.1958 | 500 mile Road America | 81 | | Kilburn / Ross | | DNF |
| 14.9.1958 | SCCA Regional Meadowdale [EM+FM+GM] | 2 | #323 | M. R. J. Wyllie | | DNA |
| 14.9.1958 | Preliminary Bridgehampton [Modified] | 19 | #275 | Charles Moran | | 7th |
| 14.9.1958 | Preliminary Bridgehampton [Handicap] | 19 | #275 | Charles Moran | | 13th |
| 14.9.1958 | SCCA Regional Bridgehampton [Modified] | 19 | #275 | Charles Moran | | 9th |
| 19.9.1958 | Preliminary Watkins Glen [Ladies] | 2 | #323 | Margaret Wyllie | M. R. J. Wyllie | 1st |
| 20.9.1958 | SCCA National Watkins Glen [FM+GM+HM] | 2 | #323 | M. R. J. Wyllie | M. R. J. Wyllie | DNF |
| 20.9.1958 | GP Watkins Glen | 2 | #323 | M. R. J. Wyllie | M. R. J. Wyllie | 11th |
| 28.9.1958 | ICNSCC Ellensburg [Modified] | 126 | | Pat Pigott | | 1st |
| 5.10.1958 | SCCA National Vaca Valley [GM+HM+GP+HP] | 35 | | John P. Young | | 7th |
| 5.10.1958 | Innsbruck [GT1.3] | 45 | | Charles Vögele | Charles Voegele | DNF |
| 5.10.1958 | SCCA National Vaca Valley [GM+HM+GP+HP] | 109 | | Dan Hernandez | | 4th |
| 5.10.1958 | SCCA National Vaca Valley [BM+CM+DM+EM+FM] | 126 | | Pat Pigott | | 15th |
| 12.10.1958 | USAC Riverside | 4 | #217 | Lew Florence | Team Empire | DNF |
| 12.10.1958 | USAC Riverside | 126 | | Pat Pigott | Team Empire | DNF |
| 1.11.1958 | Preliminary Palm Springs [CM+DM+EM+FM+GM+HM] | 35 | | John P. Young | John P. Young | DNA |
| 2.11.1958 | SCCA National Palm Springs [CM+DM+EM+FM+GM+HM] | 35 | | John P. Young | John P. Young | DNA |
| 9.11.1958 | SCCA Regional Laguna Seca [GM+HM] | 109 | | Dan Hernandez | Don Hernandez | 8th |
| 9.11.1958 | SCCA Regional Laguna Seca [EM+FM] | 126 | | Pat Pigott | P. J. Pigott | DNF |