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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 911 GT3 R (991.1, 2016–2018): the SACHS RCC 3/140 carbon racing clutch incl. flywheel and motorsport concentric slave cylinder (CSC) delivers maximum track performance with minimal diameter and low moment of inertia – precisely matched to the 4.0-L flat-six and the 6-speed sequential racing gearbox of the GT3 works kit.
ZF Race Engineering transfers top-tier technology from Formula 1, Super GT and WRC to GT3 applications. Focus: lowest rotating mass, rapid engine speed matching and high thermal stability – for consistent, repeatable performance across qualifying, sprint and endurance.
The 140-mm, triple-plate carbon configuration offers high torque density in a low stack height. This supports precise launches, short shift windows and finely controllable pedal feel – ideal for GT3 operation with BoP restrictors and long stints.
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
RCC 3/140 – Technical data
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Vehicle:
Porsche 911 GT3 R
(991.1, 2016–2018) - 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 cover (housing)
Forged high-strength aluminum, engineered for maximum stiffness at minimal weight. Geometry promotes efficient heat dissipation and stabilizes clutch pack temperatures; a hard-anodized wear-resistant finish reduces friction and fretting wear.
Material: carbon
Carbon delivers high temperature capability, stable friction across a wide operating window and progressive, easily meterable response even at elevated disc temperatures. Low density reduces rotating mass to support short shift times.
Hub spline
Supplied with the correct spline for the 991.1 GT3 R input shaft – precisely matched to the Porsche racing gearbox for perfect fit, reliable torque transfer and maximum durability.
Concentric slave cylinder (CSC)
The motorsport-grade CSC provides noticeably reduced pedal effort thanks to increased hydraulic volume. A one-piece high-strength body minimizes leak risk, while bearings rated for high engine speeds plus low-friction coatings and sealing systems ensure peak performance and reliability.
Scope of delivery
RCC 140 clutch cover (HA140), aluminum
3 × carbon drive plates (RCC 140)
4 × carbon pressure plates (RCC 140)
1 × hub for 991.1 GT3 R
1 × base plate, steel
1 × pressure ring, steel
1 × lightweight single-mass steel flywheel
1 × motorsport concentric slave cylinder (CSC)
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
GT World Challenge Europe (ex-Blancpain), ADAC GT Masters, NLS/VLN (SP9), 24h Spa, 24h Nürburgring – proven in endurance and sprint formats.
North America
IMSA WeatherTech (GTD): debut at 24h Daytona 2016, GTD class win 2017; plus GT World Challenge America.
Asia / Pacific
Intercontinental GT Challenge & Bathurst 12 Hour – high thermal and load reserves for demanding top events.
Partners of ZF Race Engineering
