McLaren racing director Eric Boullier has spoken about the upgraded engine that Honda have brought to Malaysia, saying that it is mainly focused on improving reliability and not outright speed.
Boullier also confirmed that the engine is only fitted to Fernando Alonso's car and will not be placed into Button's until at least the Japanese Grand Prix next weekend.
"It’s mainly reliability-driven, so it’s a reinforced block and a few things on the engine," he confirmed. "There is a possibility to exploit the PU a little bit better, but it’s not definitely right… not just pure power on top."
"So it’s mainly reliability-driven. I think we are happy with today, we did a lot of miles with no issue at all, so it’s just a green light for the future, for the end of the season," he added. "And as far as Jenson is concerned, when the mileage of his PUs reach the limit we will swap the engine."
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Well, an upgrade is an upgrade, and better reliability means the drivers can push more. Will be curious to see how next year's unit will perform.