The last race of the Porsche 919 Hybrid
– The WEC efficiency regulations limit the amount of energy that can be used per lap. On the 5.41 kilometres long lap of the Bahrain International Circuit, the Porsche 919 Hybrid can use 4.92 megajoule of electrical power from energy recovery systems and 1.907 litres/1.381 kg litres of petrol.
– At normal race speed, the 919 Hybrid is due for refuelling after 31 laps.
– Refuelling and changing tyres may only be done sequentially, not at the same time. Only four mechanics may work simultaneously when changing tyres and also may use only one wheel gun at a time. That takes a lot longer than in F1, for example.
– The drivers are normally only changed when new tyres are needed.
– These different types of tyres can be used: three different compounds of slick tyres for dry conditions, a hybrid tyre (no profile either but softer cover) for mixed conditions and wet weather tyres. Four sets of dry weather tyres are available per car for qualifying and the race, this is two sets less than in 2016.
– A lap on the F1 track of the Bahrain International Circuit has nine right-handers and six left-handers. The longest straight is at the start-finish and measures 1.090 kilometres.
– The circuit opened in 2004 and is located about 30 kilometres outside Bahrain’s capital of Manama. Over 30 islands in the Persian Gulf belong to the Kingdom. Its size is around 750 square kilometres and has a population of almost 1.5 million.