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Designed to make a
difference
ZF Race Engineering's SACHS motorsport clutches have stood for top-tier quality in international racing for decades. The ambition: continuous improvement and the drive to keep pushing the limits. From the lightest clutch used in Formula 1 to proven twin-plate and multi-plate systems in WRC, DTM, NASCAR, Le Mans and the Dakar Rally - ZF Motorsport technology is a core component of many winning cars worldwide.
SACHS carbon racing clutch
for Ford GT Mk IV
The Clutch of Competence
Vehicle-specific for the Ford GT Mk IV (from model year 2023): the SACHS RCC 4/140 carbon racing clutch delivers maximum track performance with minimal diameter and the lowest moment of inertia - perfect for the carbon monocoque with long-tail aero and the evolved 3.5 L EcoBoost V6 (> 800 hp) of the Mk IV.
ZF Race Engineering transfers top-tier technology from Formula 1, Super GT, and WRC into a track-only hypercar without rulebook constraints. Focus: low weight, lowest inertia, and high temperature resistance - for consistent, repeatable performance at exclusive manufacturer track days and time-attack events.
The RCC 4/140 matches the uncompromising concept of the Ford GT Mk IV: precise response at launch and during shifts, stable friction levels in high-temperature operation, and large reserves even over long stints at sustained load.
The system mass of only 2.44 kg and the low moment of inertia of 0.00768 kg·m² enable rapid rev-matching and short shift windows. In this specification up to 1,330 Nm is transferable - ideal for the torque-rich twin-turbo layout of the Mk IV.
Benefits
maximum thermal resilience - carbon quality from Formula 1
very low weight and minimal moment of inertia
smooth and comfortable launch behavior
no flywheel wear
extreme durability - up to 4x longer than conventional sintered racing clutches
Lowest mass
One of the major strengths of a carbon racing clutch is its low mass and the resulting low moment of inertia.
They are designed for the lowest possible mass with the goal of transferring engine torque to the gearbox as quickly and directly as possible.
Lightening measures in the cranktrain that reduce the moment of inertia increase vehicle acceleration noticeably in the lower gears.
Faster acceleration
If, for example, the clutch has a moment of inertia (Mtm) of 0,061 kgm2, with a gearbox ratio of 13,4:1 (first gear ratio) this acts at the drive wheel with 180 times the value (13,42). Converting Mtm into vehicle mass results in an additional weight of approx. 145 kg in 1st gear that must be accelerated.
Thanks to the extremely low inertia of the SACHS carbon clutch, shift times are significantly reduced and the vehicle accelerates faster.
Maximum service life
For carbon clutches there are pressure plate and shim packs available that compensate carbon wear. With these compensation pressure plates the clutch can be reset to as-new condition - significantly extending service life.
Each unit undergoes stringent quality checks and is individually tested and measured before shipment. Preload force, installation height and release characteristics are documented. The preinstalled carbon stack thickness is also recorded - the included document supports maintenance and the shimming process (compensation pressure plates for refurbishment).
Technology
Technical data RCC 4/140
- Vehicle:
Ford GT Mk IV 3.5 L V6 twin-turbo (2023-) - Maximum engine torque [Nm]: 1,330
- Release diameter [mm]: 38
- Release force [N]: 4,800
- Release travel [mm]: 4.5 + 0.5
- Mass (weight) [kg]: 2.44
- Moment of inertia [kg·m²]: 0.00768
Clutch cover (housing)
High-strength forged aluminum, engineered for maximum stiffness at minimum weight. The housing geometry supports efficient heat dissipation and stabilizes the clutch pack temperature window - matched to the high continuous loads of the Mk IV track setup.
Material: Carbon
Carbon offers high temperature resistance, consistent friction over a wide operating range, and finely controllable response even at high disc temperatures. Low density reduces inertia and drag torque; good thermal conductivity promotes rapid temperature stabilization - advantages in intensive track sessions.
Hub spline profile
Vehicle-specific hub spline profile: the RCC 4/140 is supplied with the exact hub spline to fit the Ford GT Mk IV (from 2023) - precisely matched to this model's gearbox input shaft. This ensures maximum fit accuracy, reliable power transfer, and durability in track use. Custom solutions are available on request.
Scope of supply
RCS 140Y clutch cover (HA184), aluminum
4 × RCS 140Y carbon driven plates
5 × RCS 140Y carbon pressure plates
1 × RCS 140Y hub, steel
1 × RCS 140Y base plate, steel
1 × RCS 140Y pressure ring, steel
Quality Made in Germany
ZF Race Engineering has been among the technology leaders in motorsport for years. The combined know-how from top-tier racing flows directly into the development of carbon racing clutches. State-of-the-art manufacturing methods, the highest quality standards and motorsport technologies make carbon clutches the first choice for maximum performance and reliability - on circuit racing as well as in rally, formula and endurance applications.
Applications
The Ford GT Mk IV is an extremely limited track-only hypercar and neither road legal nor homologated for GT classes. Typical applications include exclusive Ford/Multimatic track days, private time-attack and track events, as well as high-profile collector and demo appearances - without BoP restrictions, focused on maximum lap time and vehicle dynamics.
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