Lotus Exige GT3 Concept

Concept Cars 31 Mar 2007
Lotus Exige GT3 Concept

Unveiled at the 2007 Geneva Motor Show, the Exige GT3 Concept was developed by Lotus Sport, the brand’s race car performance division. It is powered by a 271 hp turbocharged unit and it could be produced in limited series.


Lotus Exige GT3 ConceptThe Exige GT3 Concept was inspired by Lotus’ racing heritage and built on the 2006 British GT3 Championship winning car.

Mike Kimberley, Chief Executive Officer for Group Lotus commented: “The car’s racing background becomes immediately
obvious from its aggressive stance, extreme width of rear track and innovative threedimensional
rear wing
.”

The Exige GT3 will be competing in the GT race arena in
2007.

A new one-piece front clam-shell with fully masked front wheels and wheel arch venting leads
the aerodynamically cleaned silhouette of this car.

A menacing stance is enhanced by the
aggressively flared rear wheel arches and aero-efficient three-dimensional rear wing and
blended end-plates.

That power is provided by the same charge-cooled supercharged engine that the GT3 race car
employs, producing 275PS (271bhp / 203kw) driven through ten inch rear wheels with 255
width tyres making the final connection to the road.

Lotus Exige GT3 Concept SketchMax speed (257kph / 160mph) and peak
torque have been electronically limited.

The end-plate mounted three-dimensional rear wing is highly efficient and fully complements
the widened and flattened rear deck shape in reducing the overall drag as well as maintaining
front to rear downforce balance.

Suspensions system features 2-way Ohlins adjustable dampers
together with Lotus Sport adjustable front stabiliser bar and rear suspension double-shear
track control arms.

It is intended that the Lotus Exige GT3 concept road vehicle will be further developed into a full
production car
for limited markets, to go on sale in late 2007 with an estimated price tag of
between £50,000 and £60,000.

Technical features

Engine

The supercharged and intercooled 1796 cc engine has a maximum power
output of 275 PS (271 bhp / 203 kw) at 8000 rpm and a torque figure of approximately 258 Nm
(190 lb/ft) at 7000 rpm. It features a VVTL-i variable cam system and a roots-type
Eaton M62 supercharger
(with a sealed-for-life internal mechanism meaning that it does not
require the use of the engine’s oil), which is run from the crankshaft and has an integral bypass valve
for part load operation.

Four high capacity injectors and an up rated fuel pump add additional
fuel under hard acceleration or high speed driving.

An Accusump (engine oil accumulator unit) is included in the whole package as an oil reservoir
back-up for extreme track use ensuring that, under those conditions, the engine oil pressure
remains constant. Twin oil coolers complete the powertrain package.

Transmission

A sports-type clutch plate and heavy duty clutch cover transfer the engine power and torque to
the lightweight aluminium C64 six-speed gearbox. An open type limited slip differential is fitted as standard.

The Lotus switchable
traction control system (LTCS) works through the engine, reducing power to maintain traction;
it is active above 8 kph (5 mph) and reacts much more quickly than many brake-based
systems.

Chassis Structure

Lotus designed lightweight structure of epoxy bonded aluminium alloy extrusions with crash
structure, extruded aluminium door beams, integral steel seat-belt support structure and
lightweight galvanized steel rear sub frame incorporating a structural shear panel.

Body

The Exige GT3 Concept at Geneva 2007 (Source: Autoblog.com)

GT3 derived one-piece front clamshell and wide track rear clamshell with full length roof scoop
design taken from the Cup Exige 255.

New full width rear wing with integral end plates
mounting to rear clam. Race style full width front splitter; standard Exige door and body sides
retained. Multi element rear diffuser with carbon option.

The 5-spoke forged alloy wheels (front 7Jx16 and rear 10Jx17) are shod with specific Yokohama A048 R LTS tyres (front 195/50 R16 and rear 255/40 R17).

The brake system includes 308 mm diameter 2 piece aluminium belled cross drilled and
ventilated front discs and 288 mm diameter cross-drilled and ventilated rear discs.

AP Racing two-piece radially mounted 4 piston calipers at the front and Brembo single sliding piston at
the rear.

Suspension

Fully independent suspension utilising unequal length wishbones; Öhlins 2-way adjustable
dampers with coil over springs and Lotus Sport adjustable front anti-roll bar. A rear double
shear track control arm brace is provided to cope with the expected kerb abuse during heavy
track day driving.

Lotus Exige GT3 Concept – Estimated Performances

  • 0-60 mph: 3.9 secs
  • 0-100 km/h: 4.0 secs
  • 0-100 mph: 9.8 secs
  • Maximum Speed: 160 mph (257 km/h) – electronically limited
  • Max Power: 275 PS (271 bhp / 203 kw) at 8000 rpm
  • Max Torque: 258 Nm (190 lb/ft) at 7000 rpm (electronically limited)

(Source: Lotus)

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