What are the main changes for 2014?
The normally-aspirated 2.4-litre V8 engines are replaced with 1.6-litre V6 turbo charged engines. The new, leaner engines will make up the loss of power with the use of ERS (Entergy Recovery System).
From KERS to ERS
The new hybrid power units not only get an extra boost with the KERS system but also with a second electric motor using waste heat from the turbo charger. KERS used to produce 60 KW for 6.7 seconds a lap, it can now produce up to 150 KW for 30 seconds.
Fuel is now limited to 100kg per race. Last year, fuel consumption was unlimited, but teams used 160kg per race on average.