The Supertrophy Racing Diablo GTR!

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                                                                     Lamborghini Diablo GTR

                                                     A race car for the Lamborghini Supertrophy


The Lamborghini Supertrophy is a monomarque championship held every year on the most famous race tracks, mainly in Europe. Since 1996 the cars competing in the Lamborghini Supertrophy were the Diablo SVR, a special version of the Diablo SV model adapted for racing. After four years of competition the Diablo SVR has proved the extreme reliability of the Lamborghini engines which could stand four racing seasons with no problems. Quite an achievement for an engine designed for road use and brought to the tracks with no modifications.


Now, to meet the request of the passionate driver participating in the Lamborghini Supertrophy, the House of the Bull is presenting the Lamborghini Diablo GTR, a car based on the Diablo GT, the most powerful produced in series, that will set a new benchmark in the monomarque championships with an engine delivering no less than 590 hp.


In comparison with the Diablo GT, GTR most important features are a modified chassis frame with integrated roll bar, improved suspensions, central fixing nut for the rims, race braking system, additional radiators for transmission oil cooling, very high performance rear wing (directly bolted to the chassis), simplified interiors and weight reduction. The engine is basically the same V12, 6 litre, of the Diablo GT which thanks to the adoption of a specially tuned exhaust system, without catalyser, delivers 590 hp (575 in the GT model).


Special features of the GTR engine, common to the CT, are:


·       multi-throttle intake manifold with individual intake system variable intake valve timing system

·       dynamic air inlet duct upstream of the intake plenum

·       titanium connecting rods and lighter crankshaft


Unique specifications of the GTR engine are:


·       improved exhaust system designed for racing

·       special calibration of the engine management system


The engine management system is based on the proprietary Lamborghini LIE electronic engine control system tuned for racing. Fuel injection is sequential multipoint and ignition is static with individual coils. Lamborghini Data Acquisition System, LDAS, and diagnostic functions are integrated in the engine electronic management system.


For the engine cooling, two water radiators in parallel are side mounted to the engine and an engine oil cooler is front mounted as in the Diablo CT. Additional coolers for gearbox and differential oil are installed in order to better match the racing overloads.


The transmission is on the rear wheels through a Lamborghini 5 speed gearbox with one basic gear ratio option and an alternative option for a shorter 5ih gear ratio. The gear box lever is in an asymmetric position on the central tunnel in order to be closer to the steering wheel, for better control. The steering system is power assisted.


The tubular chassis frame integrates the roll bar and is directly connected to the rear wing. The front suspension is modified for racing. Shock absorbers and anti-roll bars are adjustable. The rims are lightweight magnesium alloy with central fixing nut and they accept racing type tires. A special racing fuel tank with fast filling system has been installed.


The braking system is based on the Diablo GT high performance module. New racing brake calipers have been adopted to better match the very severe racing conditions.


Most of the body is carbon fibre made, except for the roof, which is made of steel for torsional rigidity, while the doors are made of aluminum, for safety reasons.


The cockpit fittings are simplified to meet racing requirements. The driver seat has been moved towards the longitudinal axle of the car, reducing the size of the central tunnel, to ensure a better driving position. Racing switches for ignition and for other functions have been adopted instead of the series push buttons. The fire extinguisher system is installed on the right side of the cockpit with activating switch on the tunnel. The driver's seat is of racing type with a six-point safety belt and the steering wheel is also racing type.


Lamborghini is planning to produce 30 Diablo GTR which will be ready by May 2000 in order to open the Lamborghini Supertrophy season on the 28 of May in Germany.


The Lamborghini Supertrophy will be part of some of the most prestigious motorsport events. The following Series have been approached for a calendar to be presented to the next FIA Motorsport World Council for approval of the Lamborghini Supertrophy 2000 as a FIA Sanctioned Series.


                                                            28 May                                            Germany                             DTM

                                                            11 June                                             England                               BTCC

                                                            O9July                                             Europe                                European Le Mans Series

                                                            06 August                                        Austria                                FIA GT

                                                            10 September                                   Italy                                    Formula One

                                                            15 October                                       U.S.A.                                 American Le Mans Series

                                                            OS November                                  Spain                                   Euro Open





                                                                        Lamborghini Diablo GTR

                                                                       Preliminary Specifications






Overall length                                                                                                                                   4300mm

Overall width                                                                                                                                    2040mm

Overall width (external rear mirrors included)                                                                                  2200mm

Overall height                                                                                                                                   1115mm

Track:                                                                                               front                                        1650mm

                                                                                                                rear                                          1670mm

Wheelbase                                                                                                                                         2650mm 

Weight (“dry") about                                                                                                                       1400kg                   

Weight distribution in %                                                                  front                                        40%

                                                                                                          rear                                          60%


                                                           Main characteristics

      Number of cylinders                                                                                                                      12 V 60

      Cycle-stroke                                                                                                                                      Otto-4

      Bore on stroke                                                                                                                            87x84 mm

      Fngine capacity                                                                                                                               5992 cc

      Compression ratio                                                                                                                     10, 7:l+-0 2

      Maximum power                                                                                          590 CV (434 kW) at 7300 rpm

      Maximum torque                                                                                                         640 Nm at 5500 rpm

      Crankshaft bearings                                                                                                                                    7

      Cylinder head                                                                                                  aluminum alloy + magnesium

      Crankcase                                                                                                                             aluminum alloy

      Intake manifold                                                                                                                          magnesium




DOHC, 4 valves per cylinder


Intake variable valve timing, electronically controlled




      Pump                                                                                                                                         gear type

      Oil filter

                                                                                                                                           full-flow cartridge

C ooling system


Pressurised water cooling (1.2 bar), thermostatic valve, 2 radiators "in parallel", electric fans, front mounted oil cooler, gearbox oil cooler, differential oil cooler




Lamborghini electronic engine management system LIE


Type                                                                                                 speed density/throttle speed system


Fuel injection                                                                                 sequential multiport


Ignition                                                                                           static ignition, with individual coils


  ·    TRANSMISSION                                                                    RWD


Transmission ratios                                                      standard of 5th gear “shorter ratio” optional                         


Clutch                                                                                             dry single plate

Diameter of clutch disc                                                                    272mm



                                                                                                front        8.5” x 18”

                                                                                                rear          13”  x 18”




High strength tubular frame with carbon fibre components





Double hydraulic circuit, 4 self-ventilated discs




Disc diameter                                                                                   355mm

Calipers                                                                                            Brembo racing calipers




Disc diameter                                                                                   335mm

Calipers                                                                                            Brembo racing calipers


Handbrake                                                                                      mechanical on rear wheels


Master cylinder                                                                              tandem pump 15/16”


Power assisted brake                                                                     9”






Independent wishbones, coil springs, adjustable anti-roll bar




Independent wishbones, coil springs, adjustable anti-roll bar





Hydraulic power steering




Voltage                                                                                             12V

Alternator                                                                                         14V; 115A

Battery                                                                                             12V; 70AH


· CAPACITIES                                                             


Fuel Tank                                                                                         100lt

Cooling circuit                                                                                  15lt

Engine Oil (total capacity: radiator, filter & oil ducts                      15lt


All specifications subject to change & typographical errors.




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