Besides adding power for accelerating and passing, the hybrid system can also be used simply to save fuel. Saving fuel reduces pit stops that take precious minutes, but it also saves weight, as the car needs to carry less fuel on board.
Other automakers have used hybrid cars in endurance racing before, as well as fuel efficient hi-tech diesel engines.
The GT3 Hybrid will make its first racing appearance on the track in Germany in mid-March. Porsche is keeping expectations low, saying the focus isn't on winning the race, but on using the GT3 Hybrid as a "racing lab" to gather information that could be used in future Porsche street cars.
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