CHASSIS
The aluminum spaceframe has been taken from the Temerario production line and converted for racing use through extensive lightweighting and simplification. In particular, the frame has been simplified to allow for quick removal and reattachment of the front and rear subframes during trackside operations. The removable rear subframe has been specially developed by Squadra Corse to accommodate the components of the engine and the new transmission, while all unnecessary brackets, which in the production car support the hybrid components, have been removed as they are not present in this racing version. In the central part of the aluminum frame a roll cage has been integrated, complying with FIA GT3 safety standards. The front subframe has also been modified, with removal of the electric motors that characterize the production car.
BODYWORK
Mounted on the chassis is new bodywork made from carbon composite material for the first time, to reduce the base weight of the car as far as possible. The bodywork is the result of a collaborative effort between the aerodynamics team at Squadra Corse and the Lamborghini Centro Stile. The aim was to maintain the production car’s unmistakable style while adapting it to the requirements of the new engine and brake cooling system, achieving the desired performance targets for downforce and drag to ensure optimal aerodynamic balance.
Additionally, the bodywork has been engineered for quick disassembly and reassembly during race weekends, to reduce time on pit road in case of repair. The front and rear ends of the bodywork are each constructed from a single piece. The rear diffuser, engine cover and bonnet have also been designed for rapid removal. Even the front lights feature a quick connector system for quick disassembly. The floor comes in four separate parts including two sections ahead of the front axle – one through the center of the car – and a powerful rear diffuser. The center section has been designed so that it can, if necessary, be changed while the car is on its air jacks in the pit lane.
The refuelling system has been updated to increase the flow rate into the tank, while the tank design has been changed, enabling a new fuel sensor to be used to provide more accurate readings to the team. The aerodynamics have been optimized to improve the stability of the car under braking and reduce balance shift through cornering. With temperature management in mind, airflow to the radiators has also been improved as has the front radiator design, with efficiency of paramount importance. The removal of the hybrid unit from the engine has in turn increased demand on the turbochargers, which require greater airflow to maintain control of their temperature.
POWERTRAIN
Power comes from the production-derived 4-liter, V8 twin-turbo engine that has been developed by Lamborghini engineers with a new turbocharger and compressor unit. This is due to the car meeting international GT3 regulations which do not permit hybrid systems. In doing so, Lamborghini has changed the way in which the engine delivers the 550 hp (subject to balance of performance) instead of 800 hp as in the road engine.
The powertrain of the road vehicle was developed by Lamborghini’s R&D engineers with a design architecture explicitly oriented towards potential motorsport integration from the initial concept phase, including state-of-the-art engineering solutions such as the flat-plane crankshaft with a 180-degree angle between the crankpins. This crankshaft, typically used in racing engines, ensures optimal fluid dynamic behavior due to even firing orders compared to the cross-plane crankshaft, along with a uniquely engaging sound. Titanium conrods reduce the rotating masses and offer excellent material properties in terms of strength and lightness, reducing weight.
The twin-turbo combustion engine is paired with a six-speed transverse gearbox. The airbox has been redesigned to meet the new requirements of the smaller turbochargers used in the race version, differing from those found in the road-going model. The engine has been completely recalibrated to deliver maximum performance across a broader rev range. Development of the vehicle was carried out using Pertamina Fastron Lubricants racing motor oil. The exhaust system is a custom solution developed specifically for the Temerario GT3 and is supplied by Capristo.
WHEELS AND SUSPENSION
The new model features a longer wheelbase compared to its predecessor, and a wider track front and rear, with the aim of improving stability in cornering. For the first time, the suspension features new 6-way dampers from KW, which is also the supplier for the SC63 LMDh project. The mounting points of the suspension no longer require carbon inserts in the chassis, but instead use mounting plates. The new suspension can also be changed quickly in the pits, saving time during the practice sessions by enabling fast changes to the basic setup. Tires are mounted on 18-inch wheels supplied by Ronal AG. The Temerario GT3 also features a custom hydraulic steering rack designed to achieve optimal suspension geometry and maximize performance with products from all the leading tire manufacturers to ensure that it remains competitive across the full range of championships around the world.
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