| 9.3.1958 | SCCA Regional Boca Raton [FP+GP+HP+KP+HM] | 38 | | R. E. Ruechel | | raced |
| 9.3.1958 | Preliminary Boca Raton [FP+GP+HP+KP+HM] | 60 | | Chuck Cassel | | raced |
| 9.3.1958 | SCCA Regional Boca Raton [FP+GP+HP+KP+HM] | 60 | | Chuck Cassel | | raced |
| 9.3.1958 | SCCA Regional Boca Raton [FP+GP+HP+KP+HM] | 84 | | Joyce Cuevas | | raced |
| 9.3.1958 | SCCA Regional Boca Raton [FP+GP+HP+KP+HM] | 114 | | Don Holton | | raced |
| 22.3.1958 | 12 h Sebring | 43 | #100913 | von Hanstein / Linge / Cuevas | Porsche K.G. | 10th |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 20 | | Don Dickey | | 1st |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 26 | | Bob Herda | | 7th |
| 23.3.1958 | Preliminary Stockton [Novice Production 1.6] | 27 | | Leon Robertson | | 9th |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 70 | | Fred Block | | 19th |
| 23.3.1958 | Preliminary Stockton [Novice Production 1.6] | 96 | | Robert Peck | | 4th |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 102 | | Jack Woodard | | 8th |
| 23.3.1958 | Preliminary Stockton [Novice Production 1.6] | 107 | | Charles Kuhn | | 8th |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 107 | | Charles Kuhn | | 17th |
| 23.3.1958 | Preliminary Stockton [Novice Sports] | 134 | | John France | | 11th |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 136 | | Emil Pardee | | 3rd |
| 23.3.1958 | Preliminary Stockton [Novice Production 1.6] | 162 | | Bill Minor | | 12th |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 170 | | Ed Vincent | | 2nd |
| 23.3.1958 | Preliminary Stockton [Novice Production 1.6] | 175 | | George Grinzewitsch | | 2nd |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 175 | | George Grinzewitsch | | 4th |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | 177 | | Dan Herman | | 10th |
| 23.3.1958 | SCCA Regional Stockton [Production 1.6] | | | Barneson | | DNA |
| 5.4.1958 | BRSCC Full Sutton [PS] | 64 | | Jim Clark | Border Reivers | 6th |
| 7.4.1958 | 3 h Pau [GT2.0] | | | José Behra | | ?th |
| 7.4.1958 | 3 h Pau [GT2.0] | | | Michel Slotine | | ?th |
| 7.4.1958 | 3 h Pau [GT2.0] | | | Bléhaut | | ?th |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 10 | | Don Dickey | Donald Dickey | 1st |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 19 | | D. D. Michelmore | D. D. Michelmore | DNF |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 26 | | William Kluck | Chester Kluck | 8th |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 36 | | Emil Pardee | Emil Pardee | 6th |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 72 | | Jimmy Moore | Jimmy Moore | 2nd |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 91 | | Roger Mace | Roger Mace | 5th |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 107 | | Charles Kuhn | Charles Kuhn | 14th |
| 13.4.1958 | Preliminary Palm Springs [Ladies+FIII] | 150 | | Virginia Wachel | | 9th |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 155 | | Peter Talbot | Peter Talbot | 10th |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 170 | | Ed Vincent | Ed Vincent | 3rd |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 177 | | Richard Bellows | Richard Bellows | 4th |
| 13.4.1958 | SCCA Regional Palm Springs [FP+GP+KP] | 270 | | Fred Block | Fred Block | DNS |
| 13.4.1958 | GP Avandaro | | | | | raced |
| 13.4.1958 | GP Avandaro | | | | | raced |
| 13.4.1958 | Coupes de Vitesse [GT] | | | José Behra | | 4th |
| 20.4.1958 | Marlboro [Handicap 1st Heat] | 00 | | Campbell Smidt | | 2nd |
| 20.4.1958 | Preliminary Galveston [FP+GP] | 4 | | J. Rusty Wright | | 1st |
| 20.4.1958 | SCCA Regional Galveston [FP+GP] | 4 | | J. Rusty Wright | | 1st |
| 20.4.1958 | Marlboro [Handicap 2nd Heat] | 13 | | Mrs. Tony Cappiello | | 7th |
| 20.4.1958 | Marlboro [Handicap 1st Heat] | 13 | | M. A. Cappiello | | 1st |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 13 | | M. A. Cappiello | | 2nd |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 14 | | David Elder | | 10th |
| 20.4.1958 | San Salvador | 17 | #81039 | Pedro Rodriguez | Roberto A. Reyes | 4th |
| 20.4.1958 | SCCA Regional Galveston [FP+GP] | 17 | | Emory Cantey | | 3rd |
| 20.4.1958 | Preliminary Galveston [FP+GP] | 17 | | Emory Cantey | | 3rd |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 33 | | Emil Pupulidy | | 1st |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 66 | | Nagle Bridwell | | 4th |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 116 | | Glenn Lazar | | 7th |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 124 | | Morrow Decker | | 17th |
| 20.4.1958 | Marlboro [Handicap 1st Heat] | 124 | | Morrow Decker | | 8th |
| 20.4.1958 | Marlboro [Handicap 1st Heat] | 126 | | Bruce Jennings | | 9th |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 126 | | Bruce Jennings | | 9th |
| 20.4.1958 | Marlboro [Handicap 1st Heat] | 132 | | Bill Hughes | | 3rd |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 132 | | Bill Hughes | | 3rd |
| 20.4.1958 | SCCA National Marlboro [FP+GP+HM] | 183 | | John Cuevas | | 18th |
| 20.4.1958 | Marlboro [Handicap 1st Heat] | 183 | | John Cuevas | | 5th |
| 20.4.1958 | Trofeo Nuvolari Montjuich | | | Alex Soler-Roig | | 1st |
| 26.4.1958 | Preliminary Louisville [Novice] | | | | | raced |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 5 | | Emil Pupulidy | | 1st |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 12 | | Floyd Stone | | 20th |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 22 | | Peter Baumberger | | 21st |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 25 | | Morrow Decker | | 13th |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 33 | | Bud Faust | | 7th |
| 27.4.1958 | WJC Charterhall [S2.0] | 39 | | C. W. Lawson | C. W. Lawson | raced |
| 27.4.1958 | WJC Charterhall [S+1.5] | 39 | | C. W. Lawson | C. W. Lawson | DNA |
| 27.4.1958 | WJC Charterhall [S2.0] | 40 | | Jim Clark | Border Reivers | DNF |
| 27.4.1958 | WJC Charterhall [S+1.5] | 40 | | Jim Clark | Border Reivers | ?th |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 63 | | Asher Chapman | | 23rd |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 65 | | Hayward Anderson | | DNA |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 66 | | Ed Hoyos | | 6th |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 67 | | Antonio Valdes-Dapena | | 10th |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 68 | | Bill Erhart | | 4th |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 70 | | Arthur Mann | | 17th |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 71 | | Bill Ward | | 16th |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 110 | | Bill Welsh | | 3rd |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 117 | | Hodge Brush | | DNA |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 144 | | Joe Trotter | | 14th |
| 27.4.1958 | SCCA Regional Lime Rock [FP] | 149 | | Harry Blanchard | | 2nd |
| 27.4.1958 | Preliminary Dunnellon [race 1] | | | Howard Fowler | | 1st |
| 27.4.1958 | SCCA Regional Louisville [BP+CP+DP+EP+FP Porsche] | | | Dean Causey | | 6th |
| 27.4.1958 | Dunnellon [smaller car Main] | | | Don Holton | | 1st |
| 27.4.1958 | Preliminary Dunnellon [race 1] | | | Don Holton | | 2nd |
| 27.4.1958 | Dunnellon [smaller car Main] | | | Howard Fowler | | 2nd |
| 27.4.1958 | Preliminary Louisville [EP+FP Porsche] | | | Vollmer | | 4th |
| 27.4.1958 | Preliminary Louisville [EP+FP Porsche] | | | Ed Walsh | | 2nd |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 8 | | Glenn Lazar | | DNA |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 13 | | M. A. Cappiello | | 2nd |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | 13 | | M. A. Cappiello | | ?th |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | 33 | | Emil Pupulidy | | ?th |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 33 | | Emil Pupulidy | | 1st |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 56 | | Gene Hobbs | | DNA |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | 57 | | Dick Nash | | ?th |
| 4.5.1958 | Preliminary Virginia [FP+GP+HP+KP+HM] | 57 | | Dick Nash | | DNA |
| 4.5.1958 | SCCA National Virginia [DP+EP+FP+GP+HP+KP+GM+HM] | 83 | | John Cuevas | | DNF |