Porsche has started testing the technology components of the Mission R electric racing car study unveiled at the IAA 2021 with the 718 Cayman GT4 ePerformance as the test vehicle.
At last year's IAA, the concept study had revealed the vision of an all-electric GT racing car for customer motorsport of the future, and the Mission R's e-drive concept has since "proven its performance on national and international tracks".
Like the Mission R, the all-wheel-drive race car uses the chassis of the familiar 718 GT4 Clubsport model. The electric powertrain of the 718 Cayman GT4 ePerformance is also based on one permanently excited synchronous machine (PSM) each on the front and rear axles, which can achieve up to 800 kW of power at peak.
"The integration of oil cooling played a key role in shaping the vehicle concept," explains Björn Förster, GT4 ePerformance project manager. The direct oil cooling developed by Porsche for the e-machines and the battery pack counteract thermally induced derating. Thanks to 900-volt technology, the battery can be charged from five to 80 percent SoC in around 15 minutes. The battery, with cells from the Porsche joint venture Customcells, comes to 80 kWh.
The shapes of the 718 Cayman GT4 ePerformance were created by a Porsche Style team led by designer Grant Larson. The race car is 14 centimetres wider than a 718 Cayman GT4 Clubsport, and around 6,000 parts were redesigned for it.
In March, Porsche officially confirmed its intention to offer its mid-engine 718 sports car exclusively in all-electric form by the middle of the decade. How much of the technology from the 718 Cayman GT4 e-Performance test vehicle will ultimately end up in the electric production version of the 718 remains to be seen.