Renault Sport F1 preview the Belgian Grand Prix, Round 12 of the 2014 Formula 1 world championship at Spa-Francorchamps. Rémi Taffin, Renault Sport F1 head of track operations: It’s fair to say that Spa is the hardest circuit of the year for the Power Units. There are long periods of wide open throttle, sweeping, high speed corners, hard stops and several important changes of altitude. Any one of these factors would be taxing for the new units, but the combination over one awesome 7km lap is enough to make even the hardiest engineer nervous. The lap proper starts on the climb from La Source to Les Combes. The driver will put his foot firmly on the throttle and will not lift for around...
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