Past Racing History in America
From trade show displays in Las Vegas to podium finishes across the Midwest, this Porsche 911 has a vibrant racing legacy in American motorsport. Sponsored by Destination Audio and driven by Randy Looke, the car earned multiple wins in the National Auto Sport Association (NASA), the Porsche Club of America (PCA), and the National GT Club (NGTC). With innovative engineering and standout performances, including a Rookie of the Year award and a major win at the Enduro 100, the car's American chapter is filled with excitement, innovation, and unforgettable moments. Read the full story
UK Recommissioning
Following its arrival from the U.S., this 1973 Porsche 911 underwent an intense transformation to initially become track-day ready in the UK. From resolving major safety concerns to sourcing high-performance racing components, the recommissioning process was a blend of restoration and motorsport preparation, with a wishful eye on one day entering modern-day competitive racing. Read the full story
The Return to Motorsport Racing
In close collaboration with Phil from Brough Motorsport, Dave from Electronic Performance Systems, and Russel from RSR Engineering, the car underwent a comprehensive 5-year development journey. Drawing on modern technology, advanced materials, and decades of race engineering expertise, this dedicated team transformed a 50-year-old machine into a competitive force. Today, the car confidently holds its own against much newer 911s, Caymans, and Boxsters — some more than 40 years its junior — proving that with the right people and vision, age is no barrier to performance. Read the full story
Race Seasons (CALM All Porsche Trophy)
Circuit Lap Records
The 903's best lap at every circuit it has raced in the CALM All Porsche Trophy. Circuits with more than one layout are listed separately.
| Circuit | Layout | Best Lap | Set | Report |
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Ongoing Development & Improvements
The 2026 specification has now proved itself on track. The 903 has taken the Invitation Class win at every round it has finished this season, set a new circuit record at Brands Hatch in July with the full 425bhp usable in a race for the first time, and earned its driver a first Driver of the Day trophy. With the rebuilt 915 gearbox back in the car, focus turns to the next round of targeted refinements.
- Gearbox Rebuild with Internal Spray Bar: Splitting the gearbox from the engine to fit a new clutch disc ahead of Brands Hatch in July 2026 revealed endfloat and play in the gearbox input shaft, the signature of worn bearings, and explained the gear oil that had been escaping forward into the clutch. A full strip-down and rebuild of the 915 gearbox was therefore scheduled. Separately, and with the unit coming apart regardless, the opportunity was taken to add an internal spray bar of the type Porsche ran on the 1974 911 3.0 RSR. Fed from the existing remote pump and cooler, the spray bar returns gear oil directly to the gear mesh, including the final drive gears, applying it precisely where it is most needed and improving both lubrication and cooling at the point of highest load. This is a performance upgrade in its own right rather than any part of the bearing repair. It was not carried out during the earlier gearbox work because it requires machining to the front “nose cone” housing, and with the gearbox due to be fully dismantled this was the right moment to do it. In August 2026 the casing went to the machinist for that nose cone work, and the bell housing received a throw-out bearing guide tube update at the same time: the original guide tube is machined off and a custom steel tube fitted, retained from inside the differential case with a snap ring and sealed with the factory o-ring, so that the late style 915 main shaft seal can be used on this early ’72 to ’75 transmission. Both machining jobs were successful, and the gearbox was reassembled by Russel Lewis in September 2026 with six new bearings, including the worn input shaft bearings, new synchros and dog teeth, and a full gasket set. During reassembly Russel found that the case-hardened surface layer on the teeth of the final-drive pinion had worn through to the softer core, and a newly manufactured ring gear and pinion shaft set in the same 7:31 ratio was fitted in its place. The rebuilt gearbox is ready for Thruxton.
- Exhaust Heat Management: Following extensive research into mitigating the heat generated by the exhaust manifolds within the engine bay, EPS’s Dave Rowe has identified IMMICO Thermo Immission Control Ltd as the right specialist for this work. A prominent UK-based manufacturer, IMMICO produces bespoke, motorsport-grade thermal management solutions for some of the most demanding environments in motorsport, including the British Touring Car Championship and top-tier Formula programmes. Where others rely on standard fabric wraps, IMMICO’s hallmark is the design and manufacture of custom-engineered integral insulation systems: precision-built hard-body and welded heat shielding alongside removable heatshields tailored to each application. This level of engineering is the natural choice for a supercharged, intercooled engine bay where heat soak is a critical concern.
- Pop-up Front Headlights: Custom-fit into the flat-nose front wings, these will significantly improve visibility in low-light or overcast race conditions, a vital safety addition for endurance events and late-summer sprint races.