| 16.8.1958 | SCCA National Milwaukee [FP+GP+HM] | 0 | 356 A Carrera | Chuck Rickert | | 1st |
| 16.8.1958 | Preliminary Montgomery [GT] | 5 | 356 | J. Harrison | | 6th |
| 16.8.1958 | SCCA National Milwaukee [FP+GP+HM] | 9 | 356 A Carrera | Ed Walsh | | 2nd |
| 16.8.1958 | SCCA National Milwaukee [FP+GP+HM] | 12 | 356 A Carrera | Cliff Phillips | Phillips | DNF |
| 16.8.1958 | SCCA National Milwaukee [BM+CM+DM+EM+FM+GM] | 25 | 550 | Alex Ratelle | | 17th |
| 16.8.1958 | SCCA National Milwaukee [BM+CM+DM+EM+FM+GM] | 27 | 550 RS | Ernie Erickson | | 3rd |
| 16.8.1958 | SCCA National Milwaukee [FP+GP+HM] | 40 | 356 A 1600 Super Speedster | Tommy Allen | | DNF |
| 16.8.1958 | SCCA National Milwaukee [BM+CM+DM+EM+FM+GM] | 44 | 550 RS | Dean Causey | | 6th |
| 16.8.1958 | SCCA National Milwaukee [FP+GP+HM] | 49 | 356 | Ten Grand | | 23rd |
| 16.8.1958 | SCCA National Milwaukee [BM+CM+DM+EM+FM+GM] | 77 | 550 | Bob Staples | | DNF |
| 16.8.1958 | SCCA National Milwaukee [BM+CM+DM+EM+FM+GM] | 126 | 550 Spyder | George van de Sande | | 11th |
| 16.8.1958 | SCCA National Milwaukee [FP+GP+HM] | 177 | 356 | Phil Liautaud | | 20th |
| 16.8.1958 | Preliminary Montgomery [GT] | 222 | 356 | Morrow Decker | | 4th |
| 16.8.1958 | 6 h Relay Silverstone [Handicap] | | 356 A 1600 Super | Jim Clark | | 22nd |
| 17.8.1958 | SCCA National Montgomery [FP] | 12 | 356 | Joseph Gibbons | | 16th |
| 17.8.1958 | SCCA National Montgomery [FP] | 13 | 356 A Carrera GT | M. A. Cappiello | | 4th |
| 17.8.1958 | SCCA National Montgomery [FP] | 24 | 356 1600 Super | Buel Kinne | | 7th |
| 17.8.1958 | SCCA National Montgomery [FP] | 30 | 356 | Charles Windisch | | DNF |
| 17.8.1958 | SCCA National Montgomery [FP] | 33 | 356 A Carrera GT Speedster | Emil Pupulidy | | 1st |
| 17.8.1958 | SCCA National Montgomery [FM+GM] | 62 | 550 RS | Phil Forno | Briggs Cunningham | DNF |
| 17.8.1958 | SCCA National Montgomery [FP] | 70 | 356 A Carrera Speedster | Bruce Jennings | | 6th |
| 17.8.1958 | SCCA National Montgomery [FM+GM] | 71 | 550 RS | Vic Meinhardt | | 2nd |
| 17.8.1958 | Zeltweg [GT+1.3] | 74 | 356 A 1500 GS Carrera | Hanns Roth | Hanns Roth | ?th |
| 17.8.1958 | SCCA National Montgomery [FM+GM] | 74 | 550 RS | Don Sesslar | | 3rd |
| 17.8.1958 | Zeltweg [GT+1.3] | 75 | 356 A 1500 GS Carrera | Sepp Greger | Josef Gregor | ?th |
| 17.8.1958 | Zeltweg [GT+1.3] | 76 | 356 A 1500 GS Carrera | Herbert Nosek | ÖASC | raced |
| 17.8.1958 | SCCA National Montgomery [FP] | 77 | 356 | John Bentley | | DNF |
| 17.8.1958 | Zeltweg [GT+1.3] | 77 | 356 A 1500 GS Carrera | Max Kraus | ÖASC | ?th |
| 17.8.1958 | Zeltweg [GT+1.3] | 78 | 356 A 1500 GS Carrera | Huschke von Hanstein | Dr. Ing. h. c. F. Porsche K. G. | ?th |
| 17.8.1958 | Zeltweg [GT+1.3] | 79 | 356 A 1600 Super | Eberhard Mahle | Eberhard Mahle | raced |
| 17.8.1958 | Zeltweg [GT+1.3] | 80 | 356 A 1500 GS Carrera GT Coupé | Richard von Frankenberg | R. v. Frankenberg | ?th |
| 17.8.1958 | Zeltweg [GT+1.3] | 81 | 356 A | | | DNE |
| 17.8.1958 | Zeltweg [GT+1.3] | 82 | 356 A 1500 GS Carrera Speedster | Siegfried Günther | Siegfried Günther | ?th |
| 17.8.1958 | Zeltweg [GT+1.3] | 84 | 356 A | | | DNE |
| 17.8.1958 | Zeltweg [Sports] | 98 | 550 RS | Huschke von Hanstein | | DNF |
| 17.8.1958 | Zeltweg [Sports] | 100 | 550 | Ludwig Fischer | Ludwig Fischer | 8th |
| 17.8.1958 | Zeltweg [Sports] | 102 | 550 RS | Carel Godin de Beaufort | C. Graf Beaufort | DNA |
| 17.8.1958 | Zeltweg [Sports] | 104 | 550 RS | Heini Walter | Heinrich Walter | 5th |
| 17.8.1958 | Zeltweg [Sports] | 105 | 550 | Ernst Vogel | E. Vogel (ÖASC) | 4th |
| 17.8.1958 | Zeltweg [Sports] | 107 | 550 RS | Anton von Döry | Antonio v. Döry | raced |
| 17.8.1958 | Zeltweg [Sports] | 108 | 550 RS | Milivoj Bozic | Milivoj Bozic | 6th |
| 17.8.1958 | SCCA National Montgomery [FP] | 111 | 356 A Carrera GT | Frank Wagenhofer | | 2nd |
| 17.8.1958 | Zeltweg [Sports] | 112 | 718 RSK | Jean Behra | Dr. Ing. h. c. F. Porsche KG | 2nd |
| 17.8.1958 | Zeltweg [Sports] | 114 | 718 RSK | Wolfgang von Trips | Dr. Ing. h. c. F. Porsche KG | 1st |
| 17.8.1958 | Zeltweg [Sports] | 115 | 718 RSK | Edgar Barth | Dr. Ing. h. c. F. Porsche KG | 3rd |
| 17.8.1958 | SCCA National Montgomery [FM+GM] | 133 | 550 RS | Newton Davis | | 4th |
| 17.8.1958 | SCCA National Montgomery [FP] | 137 | 356 A 1600 Super | Richard Lerner | | 5th |
| 17.8.1958 | SCCA National Montgomery [FM+GM] | 140 | 550 RS | Bob Holbert | | 1st |
| 17.8.1958 | SCCA National Montgomery [FP] | 222 | 356 | Morrow Decker | | DNF |
| 17.8.1958 | SCCA National Montgomery [FP] | 249 | 356 A Carrera GT | Harry Blanchard | | 3rd |
| 17.8.1958 | Zeltweg [GT+1.3] | | 356 A Carrera | Ludwig Blendl | | ?th |
| 17.8.1958 | Zeltweg [GT+1.3] | | 356 A Carrera | Herbert Linge | | ?th |
| 17.8.1958 | Zeltweg [GT+1.3] | | 356 A Carrera | Bruno Runte | | ?th |
| 23.8.1958 | LASC Green Acres [Le Mans] | 10 | | Anthony Sowers | Anthony Sowers | DNA |
| 23.8.1958 | LASC Green Acres [S1.6] | 10 | | Anthony Sowers | Anthony Sowers | DNA |
| 23.8.1958 | LASC Green Acres [S2.0] | 10 | 356 | Anthony Sowers | Anthony Sowers | DNA |
| 23.8.1958 | LASC Green Acres [Unrestricted] | 10 | | Anthony Sowers | Anthony Sowers | DNA |
| 23.8.1958 | LASC Green Acres [Century Class] | 10 | 356 | Anthony Sowers | Anthony Sowers | DNA |
| 24.8.1958 | Hourglass Field [S1.5] | | 356 A Carrera | Ron Cash | | 3rd |
| 24.8.1958 | Hourglass Field [Unlimited] | | 356 A Carrera | Ron Cash | | 2nd |
| 24.8.1958 | Hourglass Field [Unlimited] | | 356 Super | Jim Lockwood | | 3rd |
| 24.8.1958 | Hourglass Field [S1.5] | | 550 | Roger Pitts | | 1st |
| 30.8.1958 | Preliminary Santa Barbara [Novice] | 26 | 356 A Carrera | Peter Papke | | ?th |
| 30.8.1958 | Preliminary Santa Barbara [EM+FM] | 29 | 550 RS Spyder | Joe Playan | | 3rd |
| 30.8.1958 | Preliminary Santa Barbara [EP] | 31 | 356 1600 Super Speedster | Ronnie Bucknum | | 1st |
| 30.8.1958 | Novice Mansfield [S+1.6] | 38 | 356 1600 Super | John R. Martin | John R. Martin | DNA |
| 30.8.1958 | Preliminary Santa Barbara [EM+FM] | 50 | 550 RS | Ken Miles | | DQ |
| 30.8.1958 | Preliminary Santa Barbara [EM+FM] | 88 | 550 RS | Jack McAfee | | 2nd |
| 30.8.1958 | Preliminary Santa Barbara [EP] | 177 | 356 A Carrera | Richard Bellows | | 2nd |
| 30.8.1958 | Preliminary Santa Barbara [Novice] | 177 | 356 A Carrera | Richard Bellows | | 2nd |
| 30.8.1958 | Preliminary Santa Barbara [CP+DP] | 200 | 356 A Carrera GT | Don Dickey | | 1st |
| 30.8.1958 | Preliminary Santa Barbara [Ladies] | | 550 Spyder | Betty Shutes | | 3rd |
| 30.8.1958 | Preliminary Santa Barbara [Novice] | | 356 A 1500 GS Carrera GT Speedster | John Michelmore | | 3rd |
| 30.8.1958 | Preliminary Santa Barbara [FP] | | 356 1500 Super Speedster | Ed Barker | | 1st |
| 30.8.1958 | Preliminary Santa Barbara [CP+DP] | | 356 A 1500 GS Carrera GT Speedster | D. D. Michelmore | | 2nd |
| 31.8.1958 | Preliminary Thompson [FP] | 0 | 356 A Carrera GT | Morrow Decker | | 4th |
| 31.8.1958 | SCCA Regional Mansfield [BP+CP+DP+EP+FP] | 1 | 356 A Carrera | Carlos Schuessler | Carlos F. Schuessler | DNA |
| 31.8.1958 | Preliminary Mansfield [DP+EP+FP] | 1 | 356 A Carrera | Carlos Schuessler | Carlos F. Schuessler | DNA |
| 31.8.1958 | Preliminary Thompson [FP] | 10 | 356 A 1600 Super | Floyd Stone | | DNF |
| 31.8.1958 | Preliminary Mansfield [DP+EP+FP] | 17 | 356 A Carrera | Emory Cantey | Emory Cantey | DNA |
| 31.8.1958 | SCCA Regional Mansfield [BP+CP+DP+EP+FP] | 17 | 356 A Carrera | Emory Cantey | Emory Cantey | DNA |
| 31.8.1958 | Preliminary Thompson [FP] | 23 | 356 A 1600 | Joe Trotter | | 10th |
| 31.8.1958 | Preliminary Thompson [FP] | 24 | 356 A 1600 | Buel Kinne | | 5th |
| 31.8.1958 | Preliminary Mansfield [DP+EP+FP] | 38 | 356 1600 Super | John R. Martin | John R. Martin | DNA |
| 31.8.1958 | SCCA Regional Mansfield [BP+CP+DP+EP+FP] | 38 | 356 1600 Super | John R. Martin | John R. Martin | DNA |
| 31.8.1958 | SCCA Regional Mansfield [BP+CP+DP+EP+FP] | 41 | 356 1600 Super | Eddie Cordaro | Eddie Cordaro | DNA |
| 31.8.1958 | Preliminary Mansfield [DP+EP+FP] | 41 | 356 1600 Super | Eddie Cordaro | Eddie Cordaro | DNA |
| 31.8.1958 | Preliminary Mansfield [DP+EP+FP] | 44 | 356 A 1600 Super Speedster | Tommy Allen | Tommy Allen | DNA |
| 31.8.1958 | SCCA Regional Mansfield [BP+CP+DP+EP+FP] | 44 | 356 A 1600 Super Speedster | Tommy Allen | Tommy Allen | DNA |
| 31.8.1958 | Preliminary Thompson [FP] | 64 | 356 A 1600 | Oscar Weissenborn | | 6th |
| 31.8.1958 | Preliminary Thompson [FP] | 94 | 356 A Carrera GT | Harry Blanchard | | 1st |
| 31.8.1958 | Preliminary Mansfield [DP+EP+FP] | 104 | 356 1600 Super | Bob Welch | Bob Welch | DNA |
| 31.8.1958 | SCCA Regional Mansfield [BP+CP+DP+EP+FP] | 104 | 356 1600 Super | Bob Welch | Bob Welch | DNA |
| 31.8.1958 | Preliminary Thompson [FP] | 110 | 356 A 1600 Super | Bill Welsh | | DNF |
| 31.8.1958 | Preliminary Thompson [FP] | 112 | 356 A 1600 | John Romig | | 7th |
| 31.8.1958 | Preliminary Thompson [FP] | 137 | 356 A Carrera GT | Richard Lerner | | 3rd |
| 31.8.1958 | Preliminary Thompson [FM+GM] | 140 | 550 RS | Bob Holbert | | 1st |
| 31.8.1958 | Preliminary Thompson [FP] | 211 | 356 A Carrera GT | Frank Wagenhofer | | 2nd |
| 31.8.1958 | Courtland Trophy | | 356 A Carrera | John Cuevas | | 4th |
| 31.8.1958 | Courtland Trophy | | 550 RS | Roy Schecter | | DNA |