Racing Powertrain

1. Racing Engines

1.1 Naturally Aspirated Racing Engines

Tuned for high revs with short-stroke design and large valves; their redlines generally range from 8,500 rpm to 12,000 rpm. Examples include F4 power units and classic V8 Formula engines. They deliver linear power output with instantaneous throttle response.

1.2 Turbocharged Racing Engines

GT3, WRC and DTM vehicles all come fitted with small low-inertia turbochargers to eliminate turbo lag. Paired with high-flow wastegates, they cap boost pressure to safeguard the engine from damage.

1.3 Hybrid Racing Powertrains

Used in F1 and Le Mans Hypercars, these setups combine an internal combustion engine with an Energy Recovery System (ERS/KERS). The system harvests energy under braking and on straights, then releases extra horsepower the instant the car exits corners. The electric motor can independently power the front wheels to deliver all-wheel drive.

1.4 Upgraded Cooling Systems

Equipped with enlarged, thickened aluminium racing radiators and separate oil coolers for engine oil, transmission fluid and differential oil. Unlike road cars with bulky plastic undertrays, race cars feature extensive air ducts for forced cooling to avoid power loss caused by overheating.

2. Transmissions

2.1 Sequential Gearboxes (Standard for Most Circuit Race Cars)

These gearboxes have no synchronisers. The clutch is only used for launching; gear shifts are completed by simply pushing the lever forward or backward, with upshifts and downshifts finished within one second. They feature a simple structure capable of handling high torque, but cannot skip gears.

2.2 Paddle-Shift Semi-Automatic Transmissions (F1 / GT Racing)

Shifts are executed via electro-hydraulic actuation controlled by steering wheel-mounted paddles, taking just 0.05 to 0.1 seconds per shift. The ECU automatically cuts and restores fuel supply, eliminating the need for heel-and-toe downshifting.

2.3 All-Wheel-Drive Drivetrains (Rally & Certain GT Models)

Fitted with a central multi-plate clutch differential that distributes torque between the front and rear axles. It sends more power to the front wheels for extra grip through corners and biases output toward the rear on straights, drastically improving traction on muddy or snow-covered surfaces.

2.4 Limited-Slip Differentials (LSD)

A standard racing component that replaces open differentials.

Mechanical Clutch-Type LSD: Ideal for drifting and hill climbing. It locks the left and right drive wheels under heavy throttle to prevent wheel spin when exiting corners.

Electronic Multi-Plate LSD: Deployed in GT and F1 racing. The ECU dynamically adjusts the locking ratio based on vehicle speed and steering angle.