Formula One's managing director of motorsport Ross Brawn was not expecting such a negative response to his vision for the future of the sport's engine regulations.
Earlier this month Brawn joined forces with the FIA to present a blueprint for the sport's engine formula after 2021. The proposal aims to make F1 more affordable, its exhaust note louder, its grid more competitive and its regulations more attractive to new manufacturers entering the sport.
However, some of F1's existing manufacturers have concerns about the proposal.
Ferrari has argued the new regulations feature too much standardisation of parts and chairman Sergio Marchionne warned he would consider pulling Ferrari out of F1 if he believes the engine is not a big enough differentiator.