- 1.6L 4-cylinder 3-bar turbocharged engine
- wheel size increases from 14 inches to 18 inches
- changed sidepod design to provide more lateral protection to drivers
- limited ground-effect
The suspensions and brakes are also expected to change and there is even talk of engines having stop-start mechanicisms to save fuel during pit stops.Changing the wheel size is good, it is a bit ridiculous that road cars have 17- and 18-inch wheels on them while the premiere racing formula gets around on wheels smaller than those on my stock Toyota Yaris (15-inches, for the record).
The ground-effect I think is a step in the wrong direction. While the racing cars should still look like racing cars, ground effects can lead to sudden losses in downforce should the car ride over a bump improperly.
These are still speculation at this point, but the FIA is keen to get this agreed upon as soon as possible so that engine manufacturers can start development in 2011 so that quality engines are available in 2013.