Getty Images Enlarge Renault is confident it will make another step forward with its power unit at this weekend's Spanish Grand Prix as it introduces its next stage of software updates. After a slow start to the season, Renault has been playing catch-up to Mercedes under the new V6 turbo regulations but has been introducing software updates to narrow the gap. Red Bull, one of four customers of Renault, is relying on improved engine performance to help close in on the dominant Mercedes, and Renault is confident of delivering a boost this weekend. "The Spanish Grand Prix will be the second stage of the performance evolutions we kick-started in China," head of track operations...
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