June 23 (Reuters) - Formula One teams will be allowed an extra day of pre-season testing from next year while agreed engine tweaks have now been formally approved, the sport's governing body said on Tuesday.
The current allocation of three days of testing has been increased to four due to the complexity of the cars, the International Automobile Federation (FIA) said after its World Motor Sport Council (WMSC) met in Macau.
It added that the WMSC had ratified proposed changes "to rebalance the contribution of the Internal Combustion Engine and Energy Recovery System contribution across the 2027 and 2028 seasons.
"Updates include targeted adjustments to internal combustion engine output, fuel energy flow and energy recovery system deployment, together with increased flexibility in energy management."
The changes aim to allow more flat-out qualifying and less energy management after widespread driver complaints earlier this season that racing had become more artificial and also more dangerous.
(Reporting by Alan Baldwin; Editing by Andrew Cawthorne)
