Daniel Ricciardo had an impressive run late in the day, but Renault says there is still work to do on drivability Sutton Images Enlarge Renault says it needs to focus on the drivability of its power unit before it can say it is truly getting 100% out of its new V6 turbo and energy recovery system. Renault has been hit by a number of issues while testing its new power unit but is confident it is making progress this week at the final test in Bahrain. Daniel Ricciardo's improved performance on Friday in the Red Bull was the first tangible evidence of the step forward, but head of trackside operations Remi Taffin says the engine is still not delivering exactly in the way Renault wants....
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