McLaren Formula 1 team boss Andrea Stella thinks further changes to the power unit regulations are still required, but the timelines involved are pushing any tweaks to 2028 rather than next year.<br>F1 recently agreed on a first set of refinements to improve the qualifying spectacle and reduce the extreme closing speeds seen over the first few races of the 2026 rules era. Last weekend's Miami ...<a class='more' href='https://www.autosport.com/f1/news/why-time-is-running-out-to-make-bigger-f1-power-unit-changes-for-2027/10818520/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-ALL&utm_term=News&utm_content=uk'>Keep reading</a>