In 2023, endurance racing will begin a new chapter when the Le Mans Hypercar (LMH) and Le Mans Daytona h (LMDh) prototypes start racing for the first time. This new era will start off officially with the 2023 Rolex 24 at Daytona. The event is usually held on the last weekend of January or first weekend of February as part of Speedweeks.
To date, carmakers that have confirmed their participation with LMDh racing cars are Acura, Audi, BMW, Porsche, Alpine and Lamborghini. To that list can be added Cadillac, which may seem unusual as most people don’t associate the American luxury carmaker with motorsports.
However, Cadillac does go racing and some recent achievements include winning the IMSA WeatherTech SportsCar Championship in 2021, 2018 and 2017; winning the Rolex 24 at Daytona 4 times in a row (2020, 2019, 2018 and 2017); and winning the Michelin North American Endurance Cup 4 times (2020, 2019, 2018 and 2017).
The carmaker’s LMDh car is referred to as the Project GTP Hypercar. It is a third-generation prototype racing car from the American brand. In 2023, Cadillac will contest the IMSA WeatherTech SportsCar Championship and the World Endurance Championship (WEC), including the 24 Hours of Le Mans.
“Cadillac will be competing again on the world racing stage, and we are all thrilled to return to Le Mans after 20 years,” said Global Cadillac Vice-President Rory Harvey. “By competing in both the 2023 IMSA and WEC championships, Cadillac Racing has the opportunity to demonstrate its capability, craftsmanship and technology.”
Co-developed by Cadillac Design, Cadillac Racing and Dallara, the Project GTP Hypercar incorporates key brand design characteristics. Elements of the brand’s heritage such as vertical lighting and floating blades are present throughout and connect the Project GTP Hypercar to the future of Cadillac.
“The Project GTP Hypercar is a unique convergence of form and function and showcases Cadillac’s future performance aesthetic,” said Chris Mikalauskas, lead exterior creative designer, Cadillac. “We have plenty more to come, from the upcoming race car to amazing production vehicles.”
“Competing for the overall win at Le Mans with an iconic American brand like Cadillac is an honour,” added Laura Wontrop Klauser, GM Sportscar Racing Program Manager. “The entire team is excited to continue building Cadillac’s racing legacy by competing against the very best internationally and in the world’s toughest race.”
The new racing car will begin on-track testing in the near future. It will be powered by an all-new 5.5-litre DOHC V-8 engine that will be paired to the LMDh common hybrid system. The hybrid system will be composed of systems and components supplied by Bosch, Williams Advanced Engineering and Xtrac. Bosch will supply the motor generator unit (40 kW), while the battery system and control electronics from Williams will go on from below the chassis. The total system output will be limited to 500 kW.
Bosch, Williams Advanced Engineering and Xtrac will supply the systems and components for the common hybrid powertrain used by the LMDh racing cars.
The P1359 gearbox (pictured above) developed by XTrac has a 7-speed transverse arrangement with an integrated motor-generator unit (MGU) driving into the gearbox through an optimised geartrain. The gearbox uses Xtrac’s proven P1254 integrated valve actuator gearchange system. It houses full form ground and Xtrem polished gears and shafts in a magnesium RZ5 casing, which is a structural part of the car taking all of the loads from the rear suspension and rear impact structure, rear wing, and safety wheel tethers.
The gearbox also includes a limited-slip plate differential with an externally gas-charged pre-load and a semi-dry-sump oil system. Integral to the gearbox is a 3-litre engine oil catch tank which simplifies the powertrain installation, and the whole package including the MGU drive, but not including the MGU itself, weighs 78 kgs.
Keyword: Cadillac will join World Endurance Championship and IMSA series in 2023 with LMDh racing car