Renault Sport's Remi Taffin says the French manufacturer isn't planning any further 'big' engine upgrades this season, despite having used just 11 tokens so far, leaving it with 21 to play with - the most of any supplier. The manufacturer, which supplies both its own team and Red Bull - and will also supply Toro Rosso next season - introduced a new spec at the beginning of the season which helped it close the gap to its rivals. That was followed by a small upgrade in Bahrain and then a major upgrade in Monaco, which it believes gained around half a second per lap. Although it still lags behind the Mercedes unit, it's believed to be a match for Ferrari's and that,...
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