Toro Rosso boss Franz Tost has called for the FIA to freeze Mercedes engine development to give Renault, Ferrari, and Honda a fighting chance at catching up with the manufacturers. Mercedes have been winning the engine battle since the V6 era began back in 2014. Though their competitors have been slowly making steps towards them, they’ve hardly made a dent in Mercedes’ domination. Tost believes the drastic move of freezing the Mercedes development may need to take place if the domination continues. “I hope that earlier or later there will be a power unit parity because this is not the case currently,” he told Autosport. “I hope Renault will catch up, especially because I don’t know what’s going on with Ferrari. We need Red Bull, Mercedes, and Ferrari fighting for the championship at least. “If the power unit parity is not coming then normally the FIA should come up with a regulation to freeze it. I would freeze the power unit from Mercedes, the others should catch up and then they freeze all of them.” Tost said he would allow teams to be able to continue developing the battery even after the engine development freeze. Some elements of the power unit have already been frozen, and more things are set to be frozen next season, including the minimum weight of the entire Energy Recovery System. Tost also called again for the championship organisers to clamp down on costs. For more Formula One news and discussions head over to the RaceDepartment Formula One sub forum and join in with your fellow community members. Do you agree or should teams be allowed to develop? Let us know in the comments below!