PARIS, France - Formula 1 teams have blocked a proposal to raise the minimum vehicle weight limit for 2014.Drivers such as Daniel Ricciardo are hurriedly trimming weight ahead of the 2014 season as the new turbo V6 and ERS regulations add crucial weight to the single-seaters.A proposal to lift the mandatory weight limit was discussed at an F1 Commission meeting in Paris in December 2013 but was rejected, according to the BBC.'UNFAIR TO TEAMS'The proposal to raise the limit for 2014 needed a unanimous vote but F1 correspondent Andrew Benson said Ferrari, Mercedes and Lotus each declined.Sergio Perez said: "It would be unfair to change something in the rules this late. If something could be changed, it would be the weight limit. Even that would be unfair and some teams are against it because they have worked well and have been able to make a car lighter than the others."The BBC report said teams also voted against a proposal to force drivers to make a minimum of two pit stops a race in 2014. Pirelli reportedly pushed for the rule after its calamitous and image-damaging 2013 season during which, while trying to build quick-degrading tyres, found their quality and safety called into doubt.