F1, FIA approve Boost Mode tweak and 2027 engine overhaul

Formula 1 and the FIA approved a new set of rule changes on June 23 that reshape both immediate race operations and the sport’s longer-term engine direction. For the rest of the 2026 season, Boost Mode will be partially restored in wet or low-visibility conditions, but only to keep power delivery steady on straights. Its overtaking function will stay disabled for safety reasons. The FIA also revised Heat Hazard rules so the declaration can be made separately for sprint races and main grands prix, with notice required 24 hours before an event. Depending on conditions, the safety response will use either cooling vests or added ballast for drivers.

The council also approved a broader power-unit framework for 2027 and beyond after initial plans drew criticism from drivers for leaning too heavily on energy management in qualifying. The revised regulations shift Formula 1 away from an even split of combustion and electrical power, to 58-42 in 2027 and 60-40 in 2028. Fuel flow will rise by 5% in 2027 and 13% in 2028, while energy harvesting will increase and electric output will drop. The FIA said the changes are meant to make qualifying more flat-out while preserving racing quality.

The package also includes slightly shorter race distances at some circuits, fewer reconnaissance laps when needed, and pre-season testing for the 2027 cars will expand from three days to four. The FIA said the longer testing period reflects the complexity of the current-generation cars and aims to reduce the need for major hardware changes. The engine debate is already looking further ahead, with Formula 1 also discussing what formula should follow in 2031. FIA president Mohammed Ben Sulayem has pushed for a return to naturally aspirated V8 engines with only a minimal hybrid system, while stakeholders have shown some openness to reducing electrification and reexamining the combustion engine.