Porsche backs off on engine revision for 963 LMDh

Porsche has decided to cancel the planned revision for the engine of its 963 LMDh model, which competes in both the World Endurance Championship and the IMSA Championship. The modification, which included a switch to a 90° crankshaft, has been dropped after satisfactory performance and no reliability issues during the current season.

Urs Kuratle, the project director for the 963 at Porsche Motorsport, has confirmed that the update will not proceed. The decision is based on the lack of issues during previous races, including the 24 Hours of Le Mans, where the current engine proved to be reliable.

Thomas Laudenbach, head of Porsche Motorsport, highlighted the solid performance of the vehicle, which achieved a fourth place at Le Mans and placed four cars in the top ten. Laudenbach noted that the current engine is fast and reliable, and there is no need for changes.

The engine revision was developed last year with the aim of reducing vibrations that were thought to be affecting the hybrid system mandated in LMDh. However, the upgrades to the energy recovery system over the winter allowed Porsche to win the Daytona 24 Hours at the beginning of the year, resolving the hybrid reliability issues.

Although the revised engine was only tested on the bench and was never mounted in a race car, there is a possibility that Porsche will use one of the five “jokers” available during the five-year lifespan of the 963 in the next season. Laudenbach did not confirm if this option will be taken.