The Engineering Behind the World’s Fastest Race Cars

Introduction

Motor sports have been around for a long time and through the pursuit of the fastest lap times, engineers invented and evolved what is seen as something ordinary into a magical machine. By combining principles of the world: aerodynamics, suspension design, engine power and material composition. The highest level of work is known as Formula 1.

Aerodynamics

In a F1 car, the airflow starts from the front wing. The wing is designed to split that air into two streams: the top one that travels over the main body of the car and one that is guided towards the floor of the car. 

Meanwhile, the endplate creates an outwash that pushes the turbulent air from the front wheels away from the car’s body, ensuring the clean air travels towards the sidepods and floor. The high pressure air that travels over the main body is directed to the rear wings and sidepods (essential for cooling). 

On the other hand, the air that traveled towards the floor of the car goes into the venturi tunnels, which are located under the sidepods. As air travels into the tunnels, it becomes narrower and forces air to speed up. According to Bernoulli’s Principle, this increase in speed of air creates a low pressure zone. The difference in the pressure then pulls the car toward the track, which provides around 50% of the car’s downforce.

Furthermore, when the air moves along the side of the car, it meets the sidepods. The sidepods have been designed to create a downwash where it acts as a path for air to travel toward the rear of the car and to the top of the diffuser. 

The diffuser is located at the rear floor of the car. It is an upswept section where the floor ends, so when the air travels up the slope of the diffuser, the area of the path increases and forces the air to slow down. Its’ job is to slow down the fast moving low pressure air and expand it to match the atmospheric pressure of the air behind the car (return to normal), because without it, the low pressure air reaching the back of the car will create massive turbulence, increasing drag force, which slows down the car. 

Finally, the rear wing provides stability and downforce in corners but creates drag on straights. So, in 2025 regulations the drag reduction system (DRS) fixed this problem. When the driver is within 1 second of the rival, they can activate DRS, which flaps the upper part of the wings open, reducing the surface area and decreasing the drag. This increases the top speed by around 10-12 km/h.

SUSPENSION DESIGN

F1 cars rely significantly on ground effect aerodynamics to achieve the top speed. To accomplish this, the car must maintain a constant height above the ground because if the car’s front wing leans forward too much under braking or the rear leans backward too much under acceleration airflow of the car will be disrupted, causing a loss in downforce. So there are two main types of suspension design to maintain a constant height of the car above the ground: the pull rod and the push rod. 

A pull rod suspension connects to a higher point of the wheel and lower point of the chassis. As a result, when the car hits a bump. The wheel pulls on the torsion spring, which causes the wheel to pull the torsion spring and causes the pull rod to go outward from the chassis. This lowers the car’s center of gravity and clears the path for air to flow towards the sidepods and the floor. Oppositely, the push rod connects high on the chassis and lower on the chassis. The wheel pushes on the torsion spring and causes the push rod to go upwards towards the chassis when encountering a bump. 

Lastly, the suspension must manage the loads generated by the downforce which can be several times over the weight of the car at top speed. Therefore, teams use complex internal components such as torsion bars and heave dampers. These allow the car to be soft enough over a bump but hard enough to prevent the car from sinking at high speed. 

ENGINE PERFORMANCE 

The speed of an F1 car comes from the V6 turbocharged hybrid power unit. The components in this engine include the Internal Combustion Engine (ICE), a 1.6 L turbo V6 petrol engine which produces around 850 horsepower. This is considered to be very efficient because it gains 500 horsepower per liter of displacement. With a regulation of maximum fuel flow of 100kg/h, teams’ rpm are capped at around 10500. This forces teams to prioritise the efficiency of the ICE rather than increasing rpm. It is achieved by using lean burn technology, where the air to fuel ratio is higher than that of standard cars, which leads to maximum energy being released from the fuel. 

In addition to this, the energy recovery system (ERS) acts as a support to the ICE. It contributes around 160 horsepower. ERS contains the Motor Generator Unit - kinetic (MGU-K) and the Motor Generator Unit - Heat (MGU-H). MGU-H is used for recovering kinetic energy from breaking and converting it into electrical energy ready to be used to assist the engine (120kW). Meanwhile MGU-H recovers heat energy from the turbocharger exhaust, which is also converted into electrical energy to keep the turbo spooled up. Its role is to maintain turbo boost with minimal lag. This is the most critical component for lap time performance as it allows for aggressive corner exits that were seen in the 2025 racing.

COOLING SYSTEMS

Formula one car cooling systems consist of the Internal Power Unit (PU) Cooling and the Driver cooling system. The driver cooling system contains a box which has a fluid with a mixture of air, water or a solution of sodium chloride, potassium chloride, or propylene glycerol. The box is connected to the tubes that lie on the shirt worn by the drivers under their racing suits. These tubes wrap around the driver’s chest and back so the fluid can flow to cool the driver. 

Meanwhile, the Internal Power Unit includes the primary coolant loop where the high performance coolant is pumped through the V6 engine at high pressures. This coolant contains mixtures of water and substances such as propylene glycol to raise its boiling point. The fluid is used to absorb heat created by the combustion process and once it reaches its thermal limit. It is sent to the main radiators in the sidepods. These radiators contain thousands of tiny aluminum fins that are crucial for transferring heat from fluids to the air passing through the car at high speed. And at high speed, all the air for the engine enters through the airbox above the driver’s head.

Since F1 engines use a turbocharger, the air that is forced into the engine becomes very hot as it is compressed. To counteract this, the car uses an Intercooler. The compressed air passes through this heat exchanger from air to liquid to drop its temperature before it enters the cylinders that lead to the V6 engine. This increases the density of the air, allowing the engine to produce more power efficiently. In addition to this, the ERS (MGU-K, MGU-H and the lithium-ion battery) is highly sensitive to heat because if the battery becomes too hot, it can lose efficiency or can become dangerous. Therefore, it has its own cooling circuit as it prefers a lower operating temperature than the internal combustion engine. However, the cooling power unit requires air that is forced into the car by its own forward motion so it will create internal drag like a parachute, slowing down the car on the straights. 

MATERIAL USED

F1 cars are built with an extreme precision where each material weighs down the speed of the car. The main material is the Carbon-Fiber Reinforced Polymer (CFRP), which makes up around 85% of the car’s volume. This is chosen due to its high strength to weight ratio. Engineers can modify the rigidity of a part by layering the carbon sheets in specific directions. However, carbon fiber is often reinforced with zylon. This is used along the cockpit because it is puncture resistant, guaranteeing the driver safety from high speed accidents. 

For high temperatures, components such as the power unit and exhaust; Inconel (a nickel chromium alloy) is preferred here as it maintains its strength even when it is at a temperature of over 800 degrees. For other high stress areas, such as Halo safety devices or the gearbox casing, titanium is preferred as it provides toughness of steel with less weight and has high fatigue resistance to endure constant G force and vibrations.

When it comes to the wheel rims, aluminum is swapped out with magnesium alloys as it is lighter, which means that less energy is required to accelerate the car. The braking system uses the Carbon-Carbon composites. These are designed to operate at high temperatures (1000 degrees), so they will be effective at stopping the car. Under the car has a skid block, these are made out of a dense wood composite or reinforced resin, embedded with titanium that produces the sparks when the car bottoms out on a straight. Lastly, Nomex is used on the driver’s suits to protect the driver against direct flame, which gives time for the driver to escape fire.

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