The 2014 Formula 1 season marks the end of V8 engines as they’re replaced with smaller units but what else has changed for the sport?The 2014 regulations will see one of the most significant engine changes in the sport's history.Video: Ferrari's 2014 F1 secrets revealedThe change from 3.0-litre V10 to 2.4 litre V8 engines for the 2006 F1 season was the last major change in engine regulations. The switch from a 2.4-litre V8 naturally-aspirated engine to a 1.6-litre, V6 turbocharged engine will change several technical characteristics of F1 cars. The energy recuperation system will be more advanced while the driver will be able to boost engine power via the battery for up to 30 seconds.WHAT'S CHANGINGThe cars that emerge at the end of January 2014 for the start of pre-season testing will be very different to previous models as there are significant changes to chassis and engine regulations.Chassis changes for 2014: • The front wing will be narrower and the nose of the car will be much lower • The rear wing has been reduced in size Fuel restrictions • A maximum fuel-flow rate of 100kg an hour (Compared with a maximum fuel flow in 2013 in the region of 160-170kg/hour) • A maximum of 100kg of fuel to be used through a race. ENGINES ARE DEAD; LONG LIVE THE 'POWER TRAIN'According to F1 engineers, engines are now referred to as power-trains, to emphasise the importance of energy recovery. The engines will have a single turbo.There are now two electrical motors rather than one, driving an energy recovery system that has twice the power and 10 times the capacity of Kers (now referred to simply as ERS - Energy Recovery System, because it is regenerating more than just kinetic energy).According to the FIA, Kers produced 60kW that could be used for 6.7 seconds per lap. In 2014, ERS will have 120kW for just over 30 seconds a lap.One of the electric motors works like the current Kers. When a driver brakes, a generator captures energy and converts it into electrical power, which is stored in a battery. This can then be re-applied during acceleration to boost performance.ENERGY RECOVERYA second electrical motor is attached to the turbo. Normally a turbo has a wastegate on the exhaust, which releases excess energy if the pressure becomes too great. Instead of a wastegate, the motor will convert excess energy into electricity. The electrical energy can be used immediately or to recharge the battery pack. This second motor is new technology and it is an area that has been left open for F1 to innovate.Ferrari explains what it takes to comply with new regulations in a great video!