| 3.5.1964 | USRRC-GT Laguna Seca | 18 | | Dale Hersh | Dale Hersch | DNA |
| 3.5.1964 | USRRC-GT Laguna Seca | 21 | | Alan Johnson | Alan Johnson | DNA |
| 3.5.1964 | USRRC-GT Laguna Seca | 171 | | Dick Smith | Richard R. Smith | 13th |
| 3.5.1964 | USRRC-GT Laguna Seca | | | Milt Minter | | DNF |
| 3.5.1964 | SCCA Regional Newport [DP+EP+Sedan] | | | Mike Eyerly | | 2nd |
| 3.5.1964 | SCCA Regional Kent Fields [CP+DP+EP] | | | Peter Hutchinson | | ?th |
| 3.5.1964 | SCCA Regional Newport [CM+DM+EM+FM+GM+AP+BP+CP+Formula] | | | Allen Lander | | ?th |
| 10.5.1964 | Roskilde Ring [S1.6] | | | Ernst Poulsson | | 1st |
| 10.5.1964 | MWCSCC Meadowdale [other] | | | Don McIntosh | | ?th |
| 17.5.1964 | SCCA National Cumberland [EP] | 1 | | T. King-Hedinger | T. King Hedinger | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 2 | | Barnie Burnett | Barnie Burnett | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 12 | | Bill Romig | Bill Romig | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 15 | | Sterling Kresge | Sterling Kresge | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 17 | | Harry Wardlow | Harry Wardlow | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 21 | | Peter Hutchinson | Peter Hutchinson | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 22 | | Ron Grable | Ron Grable | 2nd |
| 17.5.1964 | SCCA National Cumberland [CP] | 34 | | John Kelly | John Kelly | 3rd |
| 17.5.1964 | SCCA National Cumberland [EP] | 37 | | Lake Underwood | Lake Underwood | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 47 | | Stuart Lichtman | Stuart Lichtman | DNA |
| 17.5.1964 | 500 km Spa | 51 | | Jacques Thenaers | | DNA |
| 17.5.1964 | 500 km Spa | 52 | | Jean-Pierre Gaban | | DNF |
| 17.5.1964 | SCCA National Cumberland [EP] | 53 | | Nagle Bridwell | Nagle Bridwell | DNA |
| 17.5.1964 | SCCA National Cumberland [GP+HP] | 54 | | Fred Drabenstadt | Fred Drabenstadt | 5th |
| 17.5.1964 | SCCA National Cumberland [EP] | 66 | | Warren Matzen | Warren Matzen | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 76 | | Charlie Wenger | M. A. Russell | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 77 | | Bruce Jennings | M. A. Russell | 1st |
| 17.5.1964 | SCCA National Cumberland [CP] | 77 | | Bruce Jennings | Bruce Jennings | raced |
| 17.5.1964 | SCCA National Cumberland [EP] | 79 | | Dave Kepple | Harold Kepple | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 83 | | Stu Allwoerden | Stuart Allwoerden | 3rd |
| 17.5.1964 | SCCA National Cumberland [CP] | 90 | | Craddock | Dr. Craddock | DNA |
| 17.5.1964 | SCCA National Cumberland [EP] | 97 | | George Frey | George Frey | DNA |
| 17.5.1964 | SCCA Regional Wilmot [other] | | | Don McIntosh | | ?th |
| 17.5.1964 | SCCA Regional Mid-Ohio [CP+DP] | | | Ray Thompson | | 1st |
| 17.5.1964 | SCCA Divisional Del Mar [EP] | | | | | 4th |
| 17.5.1964 | SCCA Regional Mid-Ohio [EP] | | | T. King-Hedinger | | 1st |
| 17.5.1964 | SCCA Divisional Del Mar [EP] | | | Jack Brink | | ?th |
| 17.5.1964 | SCCA Divisional Del Mar [EP] | | | John Buntrock | | ?th |
| 17.5.1964 | SCCA Divisional Del Mar [EP] | | | Alan Johnson | | DNS |
| 17.5.1964 | SCCA Divisional Del Mar [EP] | | | Dennis Harrison | | 2nd |
| 17.5.1964 | SCCA Divisional Del Mar [EP] | | | Walt Maas | | 3rd |
| 17.5.1964 | SCCA Divisional Del Mar [EP] | | | Johnson | Roger Bursch | 1st |
| 23.5.1964 | MCMC Oulton Park [C+1.5/GT] | 84 | | Gerhard Krassner | Gerhard Krassner | DNA |
| 24.5.1964 | Velodromloppet [S+1.15] | 2 | | Ernst Paulsson | Hyllinge MS | 2nd |
| 24.5.1964 | Velodromloppet [S+1.15] | 3 | | Rolf Lundbom | | DNA |
| 24.5.1964 | Velodromloppet [S+1.15] | 5 | #100469 | Ingemar Nordström | Medelpads AMK | 3rd |
| 24.5.1964 | Velodromloppet [S+1.15] | 11 | | Bertil Lindberg | | DNA |
| 24.5.1964 | GP Zandvoort | 50 | | "Jan Jansen" | "Jansen" | DNF |
| 24.5.1964 | GP Zandvoort | 51 | | Evert Jan Groen | E. J. Groen | 4th |
| 24.5.1964 | GP Zandvoort | 52 | | Jörgen Spat | J. J. Spat | DNA |
| 24.5.1964 | GP Zandvoort | 53 | | Arie Ruska | A. Ruska | 3rd |
| 24.5.1964 | Hill Climb Consuma | 305 | | Paolo Senni | | 104th |
| 24.5.1964 | Hill Climb Consuma | 310 | | "Mann" | | 94th |
| 24.5.1964 | Hill Climb Consuma | 311 | | Elvio Maria Zanini | | DNA |
| 24.5.1964 | Hill Climb Consuma | 312 | | Cesare Innocenti | | 93rd |
| 24.5.1964 | Hill Climb Consuma | 324 | | "Mann" | | DNA |
| 24.5.1964 | Hill Climb Consuma | 326 | | "Noris" | | DNA |
| 24.5.1964 | GP Berlin | | | Willi Kauhsen | | 4th |
| 24.5.1964 | GP Berlin | | | Burghard Böger | | 5th |
| 24.5.1964 | GP Berlin | | | Gerhard Dechow | | 6th |
| 24.5.1964 | GP Berlin | | | Günther Schwarz | | 1st |
| 24.5.1964 | GP Berlin | | | Wolfgang Harder | | 2nd |
| 24.5.1964 | GP Berlin | | | Sebastian Helliel | | 3rd |
| 24.5.1964 | GP Berlin | | | Johannes Lange | | 10th |
| 24.5.1964 | GP Berlin | | | Dieter Selzer | | 11th |
| 24.5.1964 | GP Berlin | | | Jürgen Dietrich | | DNF |
| 24.5.1964 | GP Berlin | | | Erhard Sailer | | 7th |
| 24.5.1964 | GP Berlin | | | Jim Smith | | 8th |
| 24.5.1964 | GP Berlin | | | Manfred Albrecht | | 9th |
| 30.5.1964 | Preliminary Bridgehampton [GT] | 1 | | Henry Kraaz | | 9th |
| 30.5.1964 | Harewood Acres | | | Horst Kroll | | 3rd |
| 30.5.1964 | MEC Rathdrum | | | | | raced |
| 31.5.1964 | SCCA Regional Santa Barbara [EP] | 1 | | Terry Hall | | 3rd |
| 31.5.1964 | SCCA National Bridgehampton [DP+EP] | 22 | | Ron Grable | | DNF |
| 31.5.1964 | 1000 km Nürburgring | 26 | | Blatzheim / Ranke | "Karl Moor" | DNA |
| 31.5.1964 | 1000 km Nürburgring | 27 | | Abels / Huhn | Scuderia Lufthansa | 50th |
| 31.5.1964 | 1000 km Nürburgring | 28 | | Schwarz / Dorner | Scuderia Lufthansa | 33rd |
| 31.5.1964 | 1000 km Nürburgring | 31 | | Busch / Lindermann | Dr. Dr. Helmut Busch | DNA |
| 31.5.1964 | 1000 km Nürburgring | 36 | #122 991 | Klass / Greger | Günther Klass | 15th |
| 31.5.1964 | SCCA National Bridgehampton [DP+EP] | 37 | | Lake Underwood | | 1st |
| 31.5.1964 | 1000 km Nürburgring | 53 | | Walter / Rose | Scuderia Hessen | 35th |
| 31.5.1964 | SCCA National Bridgehampton [DP+EP] | 72 | | Andrew Steele | | 10th |
| 31.5.1964 | SCCA National Bridgehampton [DP+EP] | 77 | | Bruce Jennings | | 5th |
| 31.5.1964 | SCCA National Bridgehampton [AP+BP+CP] | 77 | | Bruce Jennings | | 5th |
| 31.5.1964 | SCCA National Bridgehampton [DP+EP] | | | Hans Ziereis | | DNS |
| 31.5.1964 | SCCA Regional Nelson Ledges [EP] | | | T. King-Hedinger | | 1st |
| 31.5.1964 | SCCA Regional Santa Barbara [EP] | | | | | 5th |
| 31.5.1964 | SCCA Regional Santa Barbara [EP] | | | Dennis Harrison | | 1st |
| 31.5.1964 | SCCA Regional Santa Barbara [EP] | | | Robert Kirby | | 2nd |
| 31.5.1964 | SCCA Regional Nelson Ledges [EP] | | | Ike Eichelberger | | DNF |
| 31.5.1964 | SCCA Regional Santa Barbara [EP] | | | | | 4th |
| 31.5.1964 | SCCA Regional Nelson Ledges [EP] | | | Barnie Burnett | | 2nd |
| 6.6.1964 | Player's Mosport [Production] | 39 | | G. Decker | Heimrath Porsche Services Ltd. | 13th |
| 6.6.1964 | Player's Mosport [Production] | 58 | | Jacques Duval | Stebro Automotive Products Ltd. | 14th |
| 7.6.1964 | Hill Climb Rossfeld | 41 | | Sepp Greger | Josef Greger | 17th |
| 7.6.1964 | Hill Climb Rossfeld | 42 | | Karl Federhofer | Karl Federhofer | 19th |
| 7.6.1964 | Hill Climb Rossfeld | 44 | | Klaus Seuffert | Scuderia Hessen | 23rd |
| 7.6.1964 | Hill Climb Rossfeld | 45 | | Reinhold Jöst | Reinhold Jöst | 24th |
| 7.6.1964 | Hill Climb Rossfeld | 46 | | Friedrich Schorwath | Friedrich Schorwath | 32nd |
| 7.6.1964 | Hill Climb Rossfeld | 51 | | Hans Lazarus | Hans Lazarus | 38th |
| 7.6.1964 | Hill Climb Rossfeld | 52 | | Hans Müller-Perschl | Hans Müller-Perschl | 47th |