BMW Z4 GTE

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BMW Z4 GTE
RLL BMW Z4 GTE 56.JPG
CategoryAmerican Le Mans Series GT (2013)
United SportsCar Championship GTLM (2014-2015)
European Le Mans Series (2014-2015)
ConstructorGermany BMW
PredecessorBMW M3 GT2
Technical specifications
ChassisUnitary construction steel body with welded safety cell made of extremely rigid precision steel tubing; safety fuel tank in CRP sandwich tray; pneumatic four-stamp jack system
Suspension (front)MacPherson axle with pushrods and wishbone, additionally with adjustable shock absorbers, H&R coil springs
Suspension (rear)As front
Length4,395 mm (173 in)
Width2,010 mm (79 in)
Height1,205 mm (47 in)
Wheelbase2,512 mm (99 in)
EngineBMW P65B44 4.36 L (4,360 cc; 266 cu in) V8 90° cylinder angle, 32-valve, DOHC, four valves per cylinder, naturally aspirated (no turbocharger), front engined, longitudinally mounted
TransmissionHewland/Xtrac 6-speed semi-automatic paddle-shift gearbox, mechanical limited slip differential with additional oil/air cooler
Power480 hp (358 kW) at 7000 rpm (including air restrictor)
500 hp (373 kW) @ 7500 rpm (excluding air restrictor)
Weight1,150 kg (2,535 lb) (excluding driver and fuel)
1,245 kg (2,745 lb) (including driver and fuel)
FuelVP Racing Fuels Ethanol E85 + 15% gasoline
LubricantsCastrol EDGE
TyresMichelin
Front: 300/680 - R18
Rear: 310/710 - R18
BBS Kraftfahrzeugtechnik/O.Z. Racing aluminum wheels
Front: 12.5 x 18 inches
Rear: 13 x 18 inches
Competition history
Notable entrantsGermany/United States BMW Rahal Letterman Lanigan Racing
Notable driversUnited States Bill Auberlen
Belgium Maxime Martin
Germany Jörg Müller
United States Joey Hand
Germany Uwe Alzen
Germany Dirk Müller
United States John Edwards
United Kingdom Andy Priaulx
Germany Dirk Werner
United States Graham Rahal
Canada Bruno Spengler
Debut2013 12 Hours of Sebring
RacesWinsPolesF.Laps
35600
Constructors' Championships0
Drivers' Championships0

The BMW Z4 GTE is a racing car which competed in the sports car races such as the American Le Mans Series, Tudor United SportsCar Championship and European Le Mans Series. It competed from 2013 to 2015 and was replaced in 2016 by the M6 GTLM.[1]

Development[edit]

In late 2012, BMW Motorsport set out to replace the successful M3 GT/GT2, a car which brought BMW two team and manufacturers' championships (2010 & 2011), one drivers championship (2011), back to back Sebring 12 Hour GT class wins in 2011 and 2012 in the American Le Mans Series, as well as numerous victories in the then Intercontinental Le Mans Cup (now the World Endurance Championship) in Europe. BMW turned to the successful Z4 GT3 platform to develop a LM GTE specification race car for the ALMS, and any GTE class series.

Technical[edit]

The Z4 GTE uses the Z4 body, and same 4.4 litre V8 engine as the GT3 car. The drivetrain and gearbox are much the same in the two different types of Z4. The engine in the GT3 version produces around 500 horsepower, likewise in the GTE version, but the RPM limits are 9000, and 7500, respectively. Most of the differences between the two automobiles are in aerodynamics. The GT3 car has much more sophisticated aero, with a set of winglets on the front fenders to provide additional downforce. Both cars share a front splitter, while the GTE has slight modifications on the side edges to condition the airflow around the front wheels. The GT3 version also has a double deck rear wing, with the GTE car having a single deck wing. The rear diffuser is also less aggressive in the GTE car; it also has much wider bodywork in the rear of the car, with heavily modified aero around the wheel arches, front, and specifically rear, compared to the GT3.

American Le Mans Series[edit]

The car was debuted at the 2013 12 Hours of Sebring by BMW Team Rahal Letterman Lanigan Racing running competitively despite being a new car. Leading the GTE class at times, both Z4 GTE's encountered suspension problems with three hours to go, and went 3-5 laps down from the class leaders. The cars also showed exceptional handling, but a slight lack in straight line speed as a result. The 2013 Long Beach Grand Prix proved to be the first win for the car, with the #55 Z4 GTE driven by Bill Auberlen and Maxime Martin driving a fine race, bringing home a 1-2 finish for BMW. A second win for the #56 car of John Edwards and Dirk Muller from pole position at Lime Rock Park proved the pace of the car.

Tudor United SportsCar Championship[edit]

The Z4 GTE will feature in the GTLM class of the Tudor United SportsCar Championship - a merger of the ALMS and Grand-Am, debuting at the 2014 Rolex 24 Hours of Daytona in January.

Turner Motorsport won the inaugural 2014 Tudor United SportsCar GT-Daytona Championship with an altered version of the Z4 GT3. Drivers Dane Cameron and Markus Palttala won four races (Laguna Seca, Watkins Glen 6-Hour, Road America, and Virginia) with Cameron earning the pole position for the 12 Hours of Sebring. To compete in the GTD class, the Turner Z4 lost its GT3-spec aerodynamics, ABS, and traction control systems.

References[edit]

  1. ^ "2016 BMW M6 GTLM". www.topspeed.com. Retrieved 11 August 2017.