| 6.9.1958 | SCCA National Road America [FP+GP+HM] | 68 | A | Steve Wendt | | DNF |
| 6.9.1958 | Sunbac Silverstone [Production] | | | | | raced |
| 6.9.1958 | Sunbac Silverstone [Hadicap 1] | | TF | Harry Ratcliffe | | raced |
| 7.9.1958 | 500 mile Road America | 49 | TD | Derr Andrlik | | 22nd |
| 7.9.1958 | 500 mile Road America | 55 | A Twin Cam | Simonetti / Gaard | | 19th |
| 7.9.1958 | Scott-Brown Memorial Snetterton [S+1.1] | 100 | A | Wilson Southam | W. Southam | DNF |
| 13.9.1958 | Tourist Trophy | 28 | A Twin Cam | Bridger / Foster | Richard W. Jacobs | 14th |
| 13.9.1958 | Preliminary Bridgehampton [GT] | 47 | A | Ken Green | | 9th |
| 13.9.1958 | Harewood Acres [PS1.5] | | A | Art Smith | | 3rd |
| 14.9.1958 | SCCA Regional Meadowdale [EM+FM+GM] | 11 | TD | James Mautz | | DNA |
| 14.9.1958 | Preliminary Bridgehampton [Handicap] | 16 | A | Ed Zurhorst | | 15th |
| 14.9.1958 | Preliminary Bridgehampton [BP+CP+DP+EP+FP+HP] | 16 | A | Ed Zurhorst | | 16th |
| 14.9.1958 | SCCA Regional Bridgehampton [BP+CP+DP+EP+FP+GP] | 16 | A | Ed Zurhorst | | 24th |
| 14.9.1958 | Preliminary Bridgehampton [BP+CP+DP+EP+FP+HP] | 40 | A | Eben Sales | | 25th |
| 14.9.1958 | SCCA Regional Meadowdale [FP+GP+HP+HM] | 44 | TD | Bill Malion | | DNA |
| 14.9.1958 | SCCA Regional Bridgehampton [BP+CP+DP+EP+FP+GP] | 47 | A | Ken Green | | 23rd |
| 14.9.1958 | Preliminary Bridgehampton [BP+CP+DP+EP+FP+HP] | 47 | A | Ken Green | | DNF |
| 14.9.1958 | Preliminary Bridgehampton [Handicap] | 47 | A | Ken Green | | 16th |
| 14.9.1958 | SCCA Regional Meadowdale [FP+GP+HP+HM] | 68 | A | Steve Wendt | | DNA |
| 14.9.1958 | SCCA Regional Meadowdale [FP+GP+HP+HM] | 73 | A | C. William Allen | | DNA |
| 14.9.1958 | Preliminary Bridgehampton [BP+CP+DP+EP+FP+HP] | 93 | A | Earl Simpson | | 24th |
| 14.9.1958 | SCCA Regional Bridgehampton [BP+CP+DP+EP+FP+GP] | 93 | A | Earl Simpson | | 20th |
| 14.9.1958 | Preliminary Bridgehampton [Handicap] | 93 | A | Earl Simpson | | 14th |
| 19.9.1958 | Preliminary Watkins Glen [Ladies] | 119 | A | Peggy McClure | | 4th |
| 19.9.1958 | Preliminary Watkins Glen [Ladies] | 126 | A | Joyce Botkin | Robert F. Botkin | DNA |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 029 | A | Bob Bucher | Jake's Stable | 1st |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 9 | A | Barnie Burnett | Barnie Burnett | 6th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 9 | A | Barnie Burnett | Barnie Burnett | DNA |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 16 | A | Sherman Decker | Sherman L. Decker | DNA |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 16 | A | Sherman Decker | Sherman L. Decker | 2nd |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 21 | A | Henry Van Densen | Henry H. VanDensen | 8th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 24 | A | Brad Howes | Bradford B. Howes | 10th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 28 | A | Ed Rickard | Edward T. Rickard, Jr. | 17th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 28 | A | Ed Rickard | | DNF |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 30 | A | Dan Donoghue | D. C. Donoghue, Jr. | 13th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 30 | A | Dan Donoghue | D. C. Donoghue, Jr. | DNF |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 40 | TD | John Voss | John A. Voss | 24th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 43 | A | Art Smith | Ecurie "PIP" | DNA |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 43 | A | Art Smith | Ecurie "PIP" | DNF |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 53 | A | Ray Henley | Raymond H. Henley | 16th |
| 20.9.1958 | Oulton Park International [S+1.1] | 54 | A | Ken MacKenzie | Ecurie Chiltern | DNA |
| 20.9.1958 | Oulton Park International [S+1.1] | 61 | A Twin Cam | Ted Lund | Ted Lund | ?th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 68 | TD | Charles Ellmers | Charles R. Ellmers | DNA |
| 20.9.1958 | GP Watkins Glen | 75 | A Twin Cam | Jacques DuPont | | DNF |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 94 | A | Richard Kinsey | Richard Kinsey | DNA |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 95 | A | John Hunter | John G. Hunter, Jr. | 9th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 97 | TF | John Tame | John S. Tame | 21st |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 102 | TC | Arch McNeill | Arch J. McNeill, Jr. | 23rd |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 104 | A | Jack Paveling | Ecurie Ripley | 7th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 104 | A | Jack Paveling | Ecurie Ripley | 17th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 105 | A | George Valentine | Ecurie Ripley | 5th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 105 | A | George Valentine | Ecurie Ripley | DNF |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 107 | A | John Zeitler | John E. Zeitler | DNF |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 108 | A | Monty Allen | Monty Allen | 4th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 119 | A | Reynolds, Jr. | Fred Reynolds | 22nd |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 119 | A | Reynolds | Fred Reynolds | 14th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 123 | A | Murray Clark | Murray O. Clark | DNF |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 123 | A | Murray Clark | Murray O. Clark | DNA |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 125 | A | Ross de St. Croix | N. Ross de St. Croix | 3rd |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 126 | A | Robert Botkin | Robert F. Botkin | DNA |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 126 | A | Robert Botkin | Robert F. Botkin | DNA |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 135 | A | Jack Terhaar | | 20th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 135 | A | Jack Terhaar | | 12th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 147 | TD | Van Conway | | 19th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 149 | TC | Eric O. Pettit | | 20th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 221 | A | Homer Dasey | | 18th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 223 | A | Jim Kennedy | | 15th |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 224 | TD | Albert Foster | | 22nd |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 240 | A | Eben Harrison Sales | | 21st |
| 20.9.1958 | Preliminary Watkins Glen [MG] | 240 | A | Eben Harrison Sales | | 11th |
| 20.9.1958 | Preliminary Galveston [HM+MG+HP] | | A | Garry Dundas | | 3rd |
| 20.9.1958 | Preliminary Galveston [Novice] | | A | Henri Bailleres | | raced |
| 20.9.1958 | Preliminary Galveston [HM+MG+HP] | | A | Bill Fritts | | 2nd |
| 20.9.1958 | Preliminary Galveston [HM+MG+HP] | | A | Geno Balducci | | 4th |
| 20.9.1958 | Preliminary Galveston [HM+MG+HP] | | A | Joe Steede | | 5th |
| 20.9.1958 | Preliminary Galveston [HM+MG+HP] | | A | | | 8th |
| 20.9.1958 | Preliminary Galveston [HM+MG+HP] | | A | | | 10th |
| 20.9.1958 | Preliminary Galveston [HM+MG+HP] | | A | | | 7th |
| 20.9.1958 | Preliminary Galveston [HM+MG+HP] | | A | | | 9th |
| 21.9.1958 | GP Angola | 1 | A | Costa Macedo | | 12th |
| 21.9.1958 | LISCA Lime Rock [MG] | 37 | A | Walter Diver | | ?th |
| 21.9.1958 | LISCA Lime Rock [MG] | 78 | A | Rod Nerney | | ?th |
| 21.9.1958 | LISCA Lime Rock [MG] | 102 | TC | Arch McNeill | | ?th |
| 21.9.1958 | Tour de France | 138 | A | Orsini / Desplas | | raced |
| 21.9.1958 | LISCA Lime Rock [MG] | 221 | TD | Russ Brann | | ?th |
| 21.9.1958 | LISCA Lime Rock [MG] | 222 | TC | Tom Redican | | ?th |
| 21.9.1958 | SCCA Regional Galveston [MG+HM+HP+KP+JP+GT] | | A | Joe Steede | | 1st |
| 21.9.1958 | SCCA Regional Galveston [MG+HM+HP+KP+JP+GT] | | A | Garry Dundas | | 2nd |
| 21.9.1958 | SCCA Regional Galveston [MG+HM+HP+KP+JP+GT] | | A | Roy Dees | | 4th |
| 21.9.1958 | SCCA Regional Galveston [MG+HM+HP+KP+JP+GT] | | A | Henri Bailleres | | 3rd |
| 21.9.1958 | SCCA Regional Galveston [MG+HM+HP+KP+JP+GT] | | A | Charlie Weller | | DNF |
| 21.9.1958 | LISCA Lime Rock [MG] | | A | | | ?th |
| 21.9.1958 | Del Mar [Novice] | | TC | A. Stewart | | ?th |
| 21.9.1958 | SCCA Regional Galveston [MG+HM+HP+KP+JP+GT] | | TD | Carl Whyte | | ?th |
| 27.9.1958 | Preliminary Gardena [Ladies] | | TD | Bonnie Bosley | | 3rd |
| 27.9.1958 | Preliminary Gardena [Novice] | | Special | Al Golightly | | 2nd |
| 27.9.1958 | Preliminary Gardena [Ladies] | | A | Barbara Scott | | 2nd |
| 27.9.1958 | Consolation Gardena | | TD | Floyd Burt | | 3rd |
| 27.9.1958 | Consolation Gardena | | Special | Barton Haskell | | 2nd |
| 27.9.1958 | Preliminary Gardena [Trophy Dash] | | Special | Termite Snyder | | 3rd |