Honda's F1 chief Yasuhisa Arai says the progress of the development on its power in from Sochi has satisfied McLaren as it prepares for the United States Grand Prix.

Honda brought updates to its under-fire engine to the Russian GP two weeks ago to up the power output and was happy with the data collected and the progress shown.

Due to current regulations McLaren only ran the new power unit in Fernando Alonso's car during FP1 in Sochi to avoid any penalties carried over into Austin and Arai hopes work completed now will give Honda a boost heading into the winter development period.

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"Our goal is to gather more data throughout the remaining races, especially from our new ICE introduced in Sochi two weeks ago," Arai said. "The team has confirmed that the development direction is good, so we will now work on fine tuning it for the remaining four races. It will be interesting to see how this will work together with the updated aero package this weekend.

"We head to Circuit of The Americas with anticipation. It is a highly technical track that provides exciting racing, particularly the jostling for position around Turn One and the high speed esses that follow Turn Two. COTA is also a challenging track for the power unit set-up as the 20 turns vary in character and are infused with undulation."