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Description
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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 Racing Clutch
Audi R8 LMS GT3 Evo II
Triple-plate, sintered metallic 2.6 mm – vehicle-specific for R8 LMS GT3 Evo II
For the Audi R8 LMS GT3 Evo II (from MY 2022): the SACHS RCS 3/140 S2.6 is precisely matched to the 5.2 L V10 and the 6-speed sequential transaxle. The compact 140 mm diameter and low rotating mass enable rapid rev-matching, short shift windows and a very clear pedal feel – optimal within the BoP window of modern GT3 series.
The triple-plate layout distributes friction work and temperature across multiple surfaces, increasing torque density at low stack height. Sintered 2.6 mm clutch discs minimize clutch-pack inertia and support repeatable engagement for race starts, pit stops and aggressive out-laps.
The RCS 3/140 S2.6 delivers stable friction and high thermal robustness – tuned to the R8’s V10 characteristics and GT3 calibrations of the Evo II package.
Advantages
Light
low clutch height
Low mass and inertia
Less Mass
One of the greatest strengths of the RCS sintered clutch is its low mass and the associated low mass inertia.
The SACHS RCS clutches have been designed for racing with the objective that torque is transmitted rapidly and directly from the engine to the gearbox.
Reducing the weight of the crankshaft drive to lower the moment of inertia will considerably increase vehicle acceleration performance in the lower gears.
Faster Acceleration
If the clutch itself has a moment of inertia (MoI) of 0.061 kgm2, the MoI on the drive wheel will be 180 times higher (in first gear) for a reduction in transmission of 13.4:1 (13.42). If we convert this value into vehicle mass, we arrive around 145 kg of additional weight to be accelerated in first gear.
As a result of the low moment of inertia of the SACHS RCS clutch, shifting times are considerably reduced and the vehicle accelerates much faster.
The technology
Technical data RCS 3/140
-
Vehicle:
Audi R8 LMS GT3 Evo II (from 2022) - Maximum engine torque [Nm]: 1,430
- Release diameter [mm]: 38
- Release force [N]: 4,200
- Release travel [mm]: 4.5 + 0.5
- Mass (weight) [kg]: 3.01
- Moment of inertia [kg·m²]: 0.009230
Clutch cover (housing)
High-strength forged aluminum for maximum stiffness at low weight. The geometry promotes heat dissipation; a hard-wearing surface treatment reduces friction and fit wear and increases service life under GT3 duty (endurance & sprint).
Friction system
Sintered 2.6 mm clutch discs provide high temperature resistance and consistent friction in dry race use. The thin discs lower rotating mass – benefiting throttle response, short shift times and a defined bite point. Brief comparison: 5.2 mm = maximum thermal reserve/service life; 3.4 mm = balanced compromise; 2.6 mm = highest agility for tight packaging.
Hub spline profile
Supplied with the matching spline for the input shaft of the R8 LMS GT3 Evo II. Ensures top fit accuracy, reliable torque transfer and maximum durability in racing. Custom solutions are available on request.
Scope of supply
RCS 140 clutch cover (HA140), aluminum
1× RCS 140 pressure plate (PP140), steel
2× RCS 140 intermediate plate (IP140), steel
3× RCS 140 clutch discs, sintered 2.6 mm
Hub length: short–medium–short
Quality Made in Germany
ZF Race Engineering has been among the technology leaders in motorsport for years. The combined know-how from top-level racing flows directly into the development of RCS racing clutches. State-of-the-art manufacturing methods, the highest quality standards and motorsport technologies make ZF Motorsport clutches the first choice for maximum performance and reliability - on circuits as well as in rallying, touring and endurance racing.
Applications
Europe
Fanatec GT World Challenge Europe (Endurance & Sprint),
24h Nürburgring & NLS (SP9/GT3), DTM (GT3 regulations),
Italian GT, International GT Open, national GT series.
North America
IMSA WeatherTech SportsCar Championship (GTD/GTD PRO),
GT World Challenge America, 24H Series & regional endurance events.
Asia / Pacific
GT World Challenge Asia, Asian Le Mans Series / China Endurance,
selected GT endurance events (incl. Bathurst 12h) with Audi customer teams.
Partners of ZF Race Engineering
