| 14.9.1958 | Preliminary Bridgehampton [BP+CP+DP+EP+FP+HP] | 17 | 356 A Carrera | Bill Chadbourne | | 13th |
| 14.9.1958 | Preliminary Bridgehampton [BP+CP+DP+EP+FP+HP] | 30 | 356 A 1600 Super | Donald Mark | | 20th |
| 14.9.1958 | SCCA Regional Bridgehampton [Modified] | 62 | 550 RS | Phil Forno | Briggs Cunningham | 2nd |
| 14.9.1958 | Preliminary Bridgehampton [Modified] | 62 | 550 RS | Phil Forno | Briggs Cunningham | 1st |
| 14.9.1958 | Preliminary Bridgehampton [BP+CP+DP+EP+FP+HP] | 114 | 356 A 1600 | Albert Close | | 22nd |
| 19.9.1958 | Preliminary Watkins Glen [Ladies] | 38 | 550 | Suzy Dietrich | Bernhard Vihl | DNF |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 0 | 356 A 1500 GS Carrera GT | Morrow Decker | Cdr. S. M. Decker, Jr. | 8th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 23 | 356 A 1600 | J. Albert Schaefer | Dr. J. Albert Schaefer | 18th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 32 | 356 | Donald Baker | Donald J. Baker | DNF |
| 20.9.1958 | SCCA National Watkins Glen [FM+GM+HM] | 33 | 550 RS | Newton Davis | Newton B. Davis | 3rd |
| 20.9.1958 | GP Watkins Glen | 33 | 550 RS | Newton Davis | Newton B. Davis | 7th |
| 20.9.1958 | SCCA National Watkins Glen [FM+GM+HM] | 38 | 550 | Suzy Dietrich | Bernhard Vihl | DNA |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 50 | 356 A 1500 GS Carrera GT | John Curran | Dr. John P. Curran | 3rd |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 57 | 356 A 1500 GS Carrera GT | Dick Nash | David L. Herson | 6th |
| 20.9.1958 | SCCA National Watkins Glen [FM+GM+HM] | 62 | 550 RS | Phil Forno | Briggs S. Cunningham | DNA |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 70 | 356 A 1500 Speedster | Bruce Jennings | Bruce R. Jennings | 7th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 71 | 356 A 1500 GS Carrera | Harry Blanchard | Harry C. Blanchard | 1st |
| 20.9.1958 | SCCA National Watkins Glen [FM+GM+HM] | 74 | 550 RS | Don Sesslar | | 2nd |
| 20.9.1958 | GP Watkins Glen | 74 | 550 RS | Don Sesslar | | 5th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 89 | 356 A 1500 | Don Wolf | Donald E. Wolf | 2nd |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 110 | 356 A 1500 GS Carrera GT | Frank Wagenhofer | Frank Wagenhofer | DNA |
| 20.9.1958 | SCCA National Watkins Glen [FM+GM+HM] | 128 | Spyder | Lorrain Holder | Manfred Holder | DNA |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 137 | 356 | Antonio Valdes-Dapena | | 14th |
| 20.9.1958 | GP Watkins Glen | 140 | 550 RS | Bob Holbert | Robert Holbert | 4th |
| 20.9.1958 | SCCA National Watkins Glen [FM+GM+HM] | 140 | 550 RS | Bob Holbert | Robert Holbert | 1st |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 166 | 356 | Ed Hoyos | | 15th |
| 20.9.1958 | SCCA National Watkins Glen [FP+GP] | 171 | 356 | Bill Strand | William R. Strand | 19th |
| 20.9.1958 | SCCA National Watkins Glen [FM+GM+HM] | 229 | 550 | Lorrain Holder | | 7th |
| 20.9.1958 | GP Watkins Glen | 229 | 550 | Lorrain Holder | | DNF |
| 20.9.1958 | Taça Cidade de Luanda | | | Piron | | raced |
| 20.9.1958 | Taça Cidade de Luanda | | 550 | J. Ferguson | | raced |
| 21.9.1958 | GP Berlin | 9 | RSK | Masten Gregory | Dr, Ing. Porsche KG. | 3rd |
| 21.9.1958 | GP Angola | 15? | 550 RS | Ian Fraser Jones | | raced |
| 21.9.1958 | GP Angola | 22 | 550 | Joaquim Correira de Oliveira | | DNQ |
| 21.9.1958 | GP Berlin | 26 | 550 RS | Christian Heins | Christian Heinz | ?th |
| 21.9.1958 | GP Berlin | 34 | 718 RSK | Jean Behra | Dr, Ing. Porsche KG. | 1st |
| 21.9.1958 | GP Berlin | 35 | 718 RSK | Edgar Barth | Dr, Ing. Porsche KG. | 4th |
| 21.9.1958 | GP Berlin | 36 | RS | | Dr, Ing. Porsche KG. | DNA |
| 21.9.1958 | GP Berlin | 39 | 550 RS | Carel Godin de Beaufort | Ecurie Maarsbergen | DQ |
| 21.9.1958 | Avus [GT1.6] | 51 | 356 A Carrera | Hans Walter | Hans-Joachim Walter | raced |
| 21.9.1958 | Avus [GT1.6] | 52 | 356 A 1500 GS Carrera Coupé | Gert Kaiser | Gert Kaiser | 2nd |
| 21.9.1958 | Avus [GT1.6] | 53 | 356 A Carrera | Hans Harzheim | Hans Harzheim | DNA |
| 21.9.1958 | Avus [GT1.6] | 54 | 356 A Carrera | Helmut Deutenberg | Helmut Deutenberg | 5th |
| 21.9.1958 | Avus [GT1.6] | 55 | 356 A Carrera | Fritz Hahnl, Jr. | Fritz Hahnl jr. | 3rd |
| 21.9.1958 | Avus [GT1.6] | 56 | 356 A Carrera | Heinrich Hülbüsch | Heinrich Hülbüsch | DNA |
| 21.9.1958 | Avus [GT1.6] | 57 | 356 A Carrera | Richard Trenkel | Richard Trenkel | 7th |
| 21.9.1958 | Avus [GT1.6] | 58 | 356 A Carrera | Leo Levine | | 4th |
| 21.9.1958 | Avus [GT1.6] | 59 | 356 A 1500 GS Carrera GT Coupé | Huschke von Hanstein | | 1st |
| 21.9.1958 | Avus [GT1.6] | 61 | 356 1600 Super | Ewald Bandmann | Ewald Bandmann | 9th |
| 21.9.1958 | Avus [GT1.6] | 62 | 356 1600 Super | Wilfried Junge | Wilfried Junge | DNA |
| 21.9.1958 | Tour de France | 139 | Zagato | Storez / Buchet | | DNF |
| 21.9.1958 | Tour de France | 140 | 356 A 1500 GS Carrera | Behra / Lewis-Evans | | 6th |
| 21.9.1958 | Tour de France | 141 | 356 A Carrera | Marx / Burggraff | | DNF |
| 21.9.1958 | Tour de France | 145 | 356 A 1500 GS Carrera | Ferrier / Paolozzi | | 12th |
| 21.9.1958 | Tour de France | 151 | 356 A | Blanchoud / Wagner | | DNF |
| 21.9.1958 | LISCA Lime Rock [FP+GP] | 162 | 356 A 1600 | John Wright | | ?th |
| 21.9.1958 | LISCA Lime Rock [FP+GP] | 186 | 356 A 1600 | D. Hogan | | 1st |
| 21.9.1958 | LISCA Lime Rock [FP+GP] | 224 | 356 A 1600 | A. Betterini | | ?th |
| 21.9.1958 | Del Mar [Novice] | | 356 A Carrera | Pat Keenan | | 3rd |
| 21.9.1958 | Del Mar [FP+GP+HP] | | 356 Speedster | D. Kluck | | 2nd |
| 21.9.1958 | SCCA Regional Galveston [BP+CP+DP+EP+FP+GP] | | 356 A Carrera | Rusty Wright | | ?th |
| 21.9.1958 | SCCA Regional Galveston [CM+DM+EM+FM+GM] | | 550 RS | Bobby Burns | | 3rd |
| 21.9.1958 | Tour de France | | 356 A Carrera | Souchou / Bléhaut | | DNF |
| 21.9.1958 | Preliminary Galveston [CM+DM+EM+FM] | | 550 RS | Bobby Burns | | 3rd |
| 21.9.1958 | Preliminary Galveston [EP+FP+GP] | | 356 A Carrera | Rusty Wright | | 2nd |
| 21.9.1958 | Preliminary Galveston [EP+FP+GP] | | 356 1600 | Eddie Cordano | | ?th |
| 21.9.1958 | Preliminary Galveston [EP+FP+GP] | | 356 1600 | Emory Cantey | | ?th |
| 21.9.1958 | Del Mar [FP+GP+HP] | | 356 Speedster | Ronnie Bucknum | | 1st |
| 21.9.1958 | Del Mar [BP+CP+DP+EP] | | 356 A 1500 GS Carrera GT Speedster | D. D. Michelmore | | 3rd |
| 21.9.1958 | Del Mar [Modified] | | 550 RS | Jack McAfee | | DNA |
| 21.9.1958 | USAC Marlboro | | 550 RS | Art Bunker | | 3rd |
| 21.9.1958 | USAC Marlboro | | Special | Bill Rutan | | 4th |
| 21.9.1958 | Tour de France | | 356 A 1500 GS Carrera | Dutoit / Morel | | 10th |
| 21.9.1958 | Tour de France | | | Carmelo / Giraldo | | DNF |
| 21.9.1958 | USAC Marlboro | | | Rodger Ward | | 9th |
| 21.9.1958 | Tour de France | | 356 A Carrera | Gentilini / Maurin | | raced |
| 21.9.1958 | Del Mar [Ladies+Sedan] | | 550 Spyder | Betty Shutes | | 3rd |
| 21.9.1958 | Del Mar [BP+CP+DP+EP] | | 356 A Carrera GT | Jimmy Moore | | 2nd |
| 28.9.1958 | ICNSCC Ellensburg [AP+BP+CP+DP+EP] | 12 | 356 1600 Super Speedster | Bob Yeakel | | DNF |
| 28.9.1958 | ICNSCC Ellensburg [AP+BP+CP+DP+EP] | 17 | 356 A Carrera GT Coupé | Jim Cleland | | 10th |
| 28.9.1958 | ICNSCC Ellensburg [Modified] | 17 | 356 A Carrera GT Coupé | Jim Cleland | | 6th |
| 28.9.1958 | USAC Watkins Glen | 32 | Special | Bill Rutan | W. K. Rutan | 6th |
| 28.9.1958 | WJC Charterhall [S+1.5] | 39 | 356 A 1600 Super | Ian Scott Watson | Border Reivers | DNA |
| 28.9.1958 | ICNSCC Ellensburg [AP+BP+CP+DP+EP] | 47 | 356 A Carrera Speedster | Hal Rudow | | 8th |
| 28.9.1958 | ICNSCC Ellensburg [AP+BP+CP+DP+EP] | 57 | 356 1600 Super Speedster | Jim Mitchell | | 9th |
| 28.9.1958 | USAC Watkins Glen | 71 | 550 RS | Vic Meinhardt | | 4th |
| 28.9.1958 | ICNSCC Ellensburg [Modified] | 104 | 356 1600 Super Speedster | Ted Chittenden | | 11th |
| 28.9.1958 | ICNSCC Ellensburg [AP+BP+CP+DP+EP] | 104 | 356 1600 Super Speedster | Ted Chittenden | | 14th |
| 28.9.1958 | ICNSCC Ellensburg [FP+GP+HP+IP] | 170 | 356 1600 Normal Coupé | John Sparrow | | 4th |
| 28.9.1958 | ICNSCC Ellensburg [AP+BP+CP+DP+EP] | 172 | 356 1600 Super Speedster | Jerry Matthews | | 11th |
| 28.9.1958 | ICNSCC Ellensburg [Modified] | 522 | 356 1600 Super Speedster | Dave Tatom | | DNF |
| 28.9.1958 | Hourglass Field [BM+CM+DM+EM] | | 550 RS | Jack McAfee | | 5th |
| 28.9.1958 | Hourglass Field [BM+CM+DM+EM] | | 550 | John Davis | | 10th |
| 28.9.1958 | Hourglass Field [FP+GP+HP] | | 356 Speedster | Ronnie Bucknum | | 1st |
| 28.9.1958 | Hourglass Field [BM+CM+DM+EM] | | 550 RS Spyder | Joe Playan | | 2nd |
| 28.9.1958 | Hourglass Field [BM+CM+DM+EM] | | 356 A 1500 GS Carrera GT Speedster | D. D. Michelmore | | 8th |
| 28.9.1958 | Hourglass Field [FP+GP+HP] | | 356 Coupé | William Blatz | | raced |
| 28.9.1958 | Hourglass Field [BM+CM+DM+EM] | | 550 RS | Stan Sugarman | | 4th |
| 28.9.1958 | Hourglass Field [DP+EP] | | 356 A 1500 GS Carrera GT Speedster | D. D. Michelmore | | 2nd |
| 28.9.1958 | Hourglass Field [DP+EP] | | 356 A Carrera | Richard Bellows | | 3rd |