PMC Motorsport Lightweight aluminum (rigid / single-mass) custom flywheelBMW E36 320i 323i 328i M52 ( M52B20 / M53B25 / M52B28) / 5700g / 12,9lb

PMC Clutch – precision solutions for mechanical tuning and motorsport. Lightweight aluminum rigid flywheel with replaceable friction surface for BMW M50 M52 M54 S50 S52 S54 (petrol) M57 (M57d30 306D1 diesel) engines.

The lower inertia of a lightweight flywheel results in significantly better and faster throttle response, improving the car's acceleration. Although it does not increase engine power, it reduces drivetrain losses, resulting in slightly higher power at the wheels. Lightweight flywheels perform exceptionally well on twisty tracks, as the car regains speed lost in corners much faster.

Application:

• Drift / Time Attack: Where precise control over engine RPM and rapid reduction of unsprung mass are crucial.
• Street Tuning: For enthusiasts who want to eliminate the failure-prone dual-mass flywheel and experience a sportier vehicle characteristic.
• Motorsport: Wherever every second and every kilogram of weight reduction matters for the final result.

Advantages of a Lightweight Flywheel:

• Instant throttle response: Reduction of rotating mass allows the engine to rev up much faster, improving dynamics during gear changes and overtaking.
• Increased durability in sports: Made of high-quality aerospace aluminum alloy, the flywheel is resistant to extreme temperatures and loads that could damage a factory dual-mass flywheel.
• Serviceability (Replaceable friction plate): Thanks to the replaceable steel friction surface, the flywheel is a solution for years – when worn, you only replace the insert, not the entire element.
• Ease of installation (Bolt-on): Designed for factory mounting points, guaranteeing full compatibility with the stock pressure plate and starter motor without the need for modifications.

Weight

When designing our flywheels, we pay great attention to their weight – PMC flywheels are created for both tuning enthusiasts and those building cars for motorsport, which is why choosing the right mass is so important.

Inertia vs. Acceleration

A flywheel stores kinetic energy. The heavier it is, the more energy is required to set it in motion.

• Too light: The engine revs up instantly, which is desirable in sports, but it also drops revs just as quickly. This can make smooth gear changes difficult in daily driving.
• Properly balanced: Allows for faster throttle response while maintaining enough energy for the engine to operate correctly after releasing the accelerator pedal.

Idle Stability

A lightweight flywheel has a lower ability to dampen engine irregularities (especially in 3- or 4-cylinder units).

• If the weight is too low, the engine may idle unevenly, jerk, or even stall during sudden declutching (e.g., when approaching traffic lights).
• An appropriate mass provides an "inertia buffer" that sustains crankshaft rotation between the power strokes of individual pistons.

Ease of Launch (Torque)

A heavy flywheel helps "move" the mass of the entire vehicle from a standstill.

• With an extremely light flywheel, the driver must apply much more throttle and operate the clutch more precisely to avoid stalling the engine when taking off.
• Correct weight selection allows the car to maintain its civilized character, enabling smooth starts on hills or in traffic jams.

Specification

!! 53,64% Lighter than OE flywheel !! Only 5,7kg / 12,57lb which is approx. 5.3kg / 11.68lb less than the factory wheel.

• Compatibility: PMC custom flywheels are designed to work with the BMW M57 240mm / 9.45" clutch kit, Sachs Performance 88 308 200 1243 / 883082.001243, or their replacements fitting the OE flywheel.
• Clutch Disc: Designed for use with factory clutch discs compatible with your gearbox.
• Replaceable friction surface: The PMC flywheel friction surface ensures durability and long-term operation. In case of wear, it is easy to disassemble, and the replacement part is available in our offer.
• Original starter ring gear: Galvanized ring gear with hardness identical to OE flywheels, ensuring reliability and full cooperation with the OE starter motor.
• Balancing before shipping: Every PMC flywheel is checked and precisely balanced before shipping. If you are using a used or custom clutch kit, we recommend re-balancing the entire assembly.

It is worth noting that a lightweight flywheel provides uncompromising throttle response at the cost of eliminating factory damping elements. This translates into a more direct drivetrain operation, which may result in a natural increase in the noise of the gearbox mechanisms. This is a desirable characteristic in sports vehicles, resulting from the rigid connection of the engine to the drive.