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Description
Manufacturer
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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
Pagani Huayra R
Sintered metallic 3.4 mm – vehicle-specific for the Huayra R
For the Pagani Huayra R track hypercar (since 2021): the SACHS RCS 3/140 S3.4 uses a compact Ø 140 mm friction diameter and three plates for short shift windows and extremely fast rpm changes – perfectly matched to the high-revving V12-R (6.0 L, up to 9,000 rpm) and the 6-speed dog-ring transaxle of the Huayra R.
The 3.4 mm sintered metallic linings prioritise minimal rotating mass and rapid heat rejection. The result is crisp launch response, quick rpm matching and a consistently defined bite point – durable even at high disc temperatures during track use.
The forged aluminum clutch cover (housing) provides high stiffness at low weight and aids heat dissipation; high-strength steel pressure and intermediate plates ensure launch strength and durability over long Arte-in-Pista stints.
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:
Pagani Huayra R (from 2021, track-only) - Maximum engine torque [Nm] : 1,067
- Release diameter [mm] : 38
- Release force [N] : 4,200
- Release travel [mm] : 4.5 + 0.5
- Mass (weight) [kg] : 3.07
- Moment of inertia [kg·m²] : 0.009450
Clutch cover (housing)
Forged high-strength aluminum for maximum stiffness at low weight. Geometry promotes heat rejection and stabilises the clutch pack’s temperature window; a hard-wearing finish reduces fretting and fit wear for long service life on track.
Friction lining
Sintered metallic linings provide high temperature capability and stable friction in dry high-load use. The 3.4 mm option minimises inertia of the discs and favours short shift times.
Hub spline profile
Precisely vehicle-specific: this RCS 3/140 S3.4 is delivered with the correct hub spline for the Pagani Huayra R – matched to the input shaft of the HWA 6-speed dog-ring transaxle for top fit accuracy, reliable torque transfer and maximum durability.
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 disc, sintered 3.4
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
Pagani Arte in Pista – exclusive track events for Huayra R / R Evo / Zonda R (e.g. Monza, Nürburgring, Spa). Plus demo runs/show laps at selected events.
Americas
Arte-in-Pista customer events and VIP track days on North-American circuits – no participation in GT series/championships.
Asia / Pacific
Selected Arte-in-Pista events and invitation-only track days; pure track car, no FIA-homologated series.
Partners of ZF Race Engineering
