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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
Porsche 911 GT3 R
The Clutch of Competence
Vehicle-specific for the Porsche 992 GT3 R from 2023: The SACHS RCC 3/140 carbon racing clutch delivers maximum on-track performance with minimal diameter and very low rotational inertia – perfectly matched to the 4.2-L flat-six and the 6-speed transaxle sequential gearbox of the GT3 customer racing package.
ZF Race Engineering transfers top-tier technology from Formula 1, Super GT and WRC directly into the LMGT3/GT3 application. Focus: lowest rotating mass, rapid rev matching and high thermal stability – for consistent, repeatable performance across qualifying, sprints and endurance stints in WEC-LMGT3, IMSA GTD/GT-Pro and GT World Challenge.
The three-plate carbon layout in Ø 140 mm offers high torque density with a low stack height. This supports precise launches, short shift windows and a finely adjustable pedal feel – ideal under BoP classifications and at high disc temperatures.
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).
The Technology
Technical Data RCC 3/140
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Vehicle:
Porsche 911 GT3 R (992, from 2023) - Engine / drivetrain: 4.2 L naturally aspirated flat-six
6-speed sequential (transaxle) - Max. engine torque [Nm] : 900
- Release diameter [mm] : 38
- Release force [N] : 4.800
- Release travel [mm] : 4.5 + 0.5
- Mass (weight) [kg] : 2.17
- Moment of inertia [kg·m²] : 0.00687
Clutch housing
High-strength forged aluminium – maximum stiffness at minimum weight. The housing geometry supports efficient heat dissipation and stabilises the clutch pack’s temperature window – essential for GT3 endurance use and repeated race starts.
Material: carbon
Carbon provides high temperature resistance, stable friction coefficients and a progressive, easily-metered response. Low density reduces inertia and drag torque; thermal behaviour enables quick stabilisation – ideal for WEC-LMGT3 and IMSA GTD/GT-Pro.
Hub spline
Supplied to fit the input shaft of the 911 GT3 R (992). This ensures maximum fit accuracy, reliable torque transfer and long service life in GT3 racing.
Scope of supply
RCC 140 clutch housing (HA140), aluminium
3 × carbon driven plates (RCC 140)
4 × carbon pressure plates (RCC 140)
1 × hub for 992 GT3 R
1 × base plate (RCC 140), steel
1 × pressure ring (RCC 140), 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
Europe
FIA WEC – LMGT3 (since 2024; Le Mans class win 2024), GT World Challenge Europe (Endurance & Sprint), DTM (since 2023), NLS & 24h Nürburgring, national GT series (e.g. ADAC GT Masters, British GT) and 24H Series.
North & South America
IMSA WeatherTech – classes GTD / GTD Pro (992-generation race debut at the 24 Hours of Daytona 2023), plus GT World Challenge America and regional endurance series with GT3 class.
Asia / Pacific
Fanatec GT World Challenge Asia (wins since 2023), Asian Le Mans Series (LMGT3) and GT events such as Bathurst 12 Hour and GTWC Australia.
Partners of ZF Race Engineering
