Content .. 129 130 131 132 ..

Lotus Eleven/Elise/Exige. Manual - part 131

Lotus Service Notes

2-Eleven

Page 18

Access to the brake master cylinder reservoir is available via a small panel in the driver's side front body;

release the screw fastener using the tool provided in the roll over bar backstay, and withdraw the panel. To

reﬁt, engage the tongue beneath the front end of the aperture, and secure the rear end with the fastener. Note

that to avoid erroneous low ﬂuid tell tale activation under extreme track use, it may be necessary to ﬁll the ﬂuid

reservoir to the base of the neck.

Option

An optional brake upgrade comprises larger front discs (308mm vs. 288mm) mounted on alloy centres

and clasped by A.P. Racing 4- pot callipers.

Brake Pad Bedding

If new brake pads and/or discs are to be ﬁtted, a bedding-in procedure should be followed:

WARNING; This procedure should be carried out only on a closed track, paying appropriate regard to

any other track users. Do not attempt on the public highway.

The purpose of brake pad bedding is to:

Transfer a layer of friction material onto the disc faces to achieve maximum performance;

Stabilise compressible materials to avoid a spongy pedal;

Boil off volatile elements in the friction compound;

Align the pad and brake disc surfaces for full contact.

If the pads are not bedded in correctly, or are used aggressively straight after ﬁtting, pad glazing may oc-

cur. This condition results from resins in the pad material crystallising on both the pad friction surface and the

brake disc surface, producing brake judder and vibration. Also, rapidly escaping volatile elements and moisture

from the resin, in seeking an immediate escape route out of the friction compound, can create small ﬁssures

that can lead to cracking and chunking of the material.

Bedding Procedure;

To generate some heat in the discs and pads, perform 4 to 6 stops with medium brake pressure from

around 70 mph (110 km/h) to 40 mph (60 km/h), allowing around 30 seconds between stops. The pad

temperature should not exceed 400 degrees C.

Immediately after this procedure, carry out one high speed stop with medium to heavy brake pressure,

without activating the ABS, from around 80 mph (130 km/h) to 40 mph (60 km/h).

Perform 3 or 4 recovery stops to clean the discs and pads, using light pedal pressure from around 70 mph

(110 km/h) to 40 mph (60 km/h).

Repeat the high speed stops, including the recovery stops, a further 2 or 3 times. The brakes may now

be considered fully bedded.

New Pads on Used Discs

If new brake pads are to be ﬁtted on used discs, it is recommened to chamfer the edges of the pad to

allow optimum bedding.

Parking Brake

Immediately after track use or hard brake usage when the discs are still hot, if possible, avoid using the

parking brake (chock wheels) to prevent heat transfer into the pads and brake ﬂuild.

2-ELEVEN.K - COOLING

The 2-Eleven uses the standard horizontally mounted radiator, with twin cooling fans on its underside.

The fans are switched individually by the engine ECM in conjunction with a fan control module mounted in

the chassis front well, behind the radiator. One fan is switched on at 98°C on rise, off at 93°C on fall, with the

second fan motor run in parallel, and switched on at 103°C on rise, off at 98°C on fall.

Twin front mounted oil/air coolers (std. Exige hot climate spec.) are ﬁtted, one ahead of each front wheel.

An engine intake air chargecooler radiator is rubber mounted behind the engine, with cooling airﬂow gathered

by body apertures alongside the rear of the cabin, and fed via convoluted ducting to a collector on the forward

side of the chargecooler. Air exhausting from the chargecooler radiator escapes via a rear transom aperture.

Page 19

Lotus Service Notes

2-Eleven

Engine Bay Ventilation

The body of the 2-Eleven incorporates

four air intake ducts;

Grilled air intakes at each side of the front

scuttle, feed air via ducting formed within

the body sides to the engine bay; the left

hand duct feeds a cool air supply with a

small 'ram'effect to the engine air cleaner;

the right hand duct feeds cooling air to

the front of the engine bay.

Two grilled air intakes at the rear of the

cockpit sides supply a plenum on the

front of the chargecooler radiator.

Hot air exhausts from the engine bay via

an aperture in the rear body.

2-ELEVEN.L - FUEL SYSTEM

In order to meet the fuelling requirements of the 255 PS engine speciﬁcation, a high output fuel pump is

ﬁtted in the otherwise unchanged tank. This pump is slightly longer than the standard item and requires a new

alloy cap (replaces original plastic cap) to retain the pump in the plastic housing inside the tank.

Engine bay cooling Chargecooler airﬂow

ohs161B

Engine intake airﬂow

Lotus Service Notes

2-Eleven

Page 20

2-ELEVEN.M - ELECTRICAL

The 2-Eleven is available with three levels of lighting equipment:

Track; with no lighting equipment.

Race; with rear turn lamps, brake lamps and rear fog lamps.

Road; with full lighting set, but no CHMSL.

Lighting Switches (if ﬁtted)

Principal lighting functions are control-

led by a row of three push button switches

mounted in a nacelle below the scuttle top

edge; for the rear fog switch (if ﬁtted) see

later. Each switch is pressed once to switch

on, and pressed a second time to switch off.

A symbol accompanies each switch to indicate

its function.

Sidelamp Switch

Positioned in the right hand end of the panel, this switch functions with or without the ignition, and switches

on the sidelamps and instrument/switch illumination. A tell tale in the switch button lights up green to indicate

when the circuit is active.

Press the switch a second time to switch off the sidelamps, but note that the headlamps must ﬁrst be off

(see below).

Headlamp Switch

Centremost of the three switches, that for the headlamps functions with or without ignition, and switches

on the headlamps together with the sidelamps and instrument/switch illumination. A tell tale in the switch but-

ton lights up green to indicate when the circuit is active. The steering column lever switch (see later) is used

to select main or dip beam.

Pressing the switch a second time will switch off the headlamps, but leave on the sidelamps (see

above).

Hazard Warning Lamps Switch

The hazard warning switch is located at the left hand end of the panel and has an icon in the switch but-

ton which is back lit when the ignition is switched on. The switch is operative at all times, and when pressed,

causes all the turn indicator lamps to ﬂash in unison. The turn lamps tell tale and the hazard switch icon will

also ﬂash. Press a second time to switch off.

This facility should be used when the car is stopped on the highway in circumstances where a warning

to other trafﬁc would be judicious. Use of the hazard warning lamps may be subject to local trafﬁc laws, with

which drivers should familiarise themselves.

Instrument Illumination

A small button is provided on the steering column shroud ahead of the ignition switch, by which the bright-

ness of the electroluminescent instrument illumination may be adjusted. To cycle through the range of bright-

ness, ﬁrst switch on the lights, and then press and hold the button before releasing at the desired setting.

Note that this dual function button also resets the trip distance recorder if pressed only brieﬂy.

Headlamp switch

Hazard switch Sidelamp switch

RHD shown

ohs163B

Page 21

Lotus Service Notes

2-Eleven

SIDE PANEL SWITCHES

Situated at the end of the fascia, outboard

of the steering column is a switch panel pro-

viding various functions dependent on vehicle

speciﬁcation.

Engine Start Button

Fitted on all cars, at the bottom of this

panel is a red button to activate the engine

starter motor. This circuit is operative only

when the ignition is switched on. Care should

be taken not to press the button when the

engine is running, as damage to the starter

mechanism is likely to be caused.

For correct operation of this function see ‘Starting Procedure’.

Rear Fog/Rain Light Switch (if ﬁtted)

On cars ﬁtted with full road lighting, the switch above the starter button controls the two rear fog lamps,

which operate only in conjunction with the ignition and headlamps. Tell tales in the switch button and instrument

pack light up amber to indicate when the circuit is active. Press a second time to switch off the lamps.

Note that whenever the headlamps and/or ignition are switched off, the fog lamps will also switch off. On

re-instatement of ignition and headlamps, the fog lamps will remain off until requested again by pressing the

switch.

For track cars ﬁtted with rear warning ‘rain’ lamps, these may be activated any time the ignition is on, by

pressing this button. Tell tales in the switch button and instrument pack light up amber to indicate when the

circuit is active. Press a second time to switch off the rain lamps.

Lotus Traction Control

All cars are equipped with Lotus Traction Control (LTC), whether or not the optional Limited Slip Differential

(LSD) is speciﬁed.

Lotus Traction Control (LTC) is a software programme within the engine electronic control unit (ECU) which

uses inputs from the wheel speed sensors to determine the degree of wheelspin occurring, and when necessary,

modulate fuel injector delivery to control engine power output until grip is restored. This feature, which operates

at all speeds above 6 mph, can improve vehicle stability in some extreme conditions of use, especially where

variable surface grip prevails, or when maximum vehicle performance is being exploited.

The optional Torsen type Limited Slip Differential (LSD) is a mechanical gear system incorporated into the

ﬁnal drive unit, and limits the speed differential between the two rear wheels by distributing the applied torque

in accordance with the available grip at each tyre. This feature can enhance vehicle performance in certain

types of off-road or closed venue competition, and help maintain mobility in mud, snow or sand. LTC then acts

electronically to stabilise high speed vehicle behaviour under high cornering loads or extreme manoeuvres.

If the LTC tell tale in the instrument panel is seen to ﬂicker, this is an indication that the tractive limit has

been reached, and traction control activated.

Lotus Traction Control ‘Off’ Button:

In certain circumstances, such as loose or soft surfaces, it may be desirable temporarily to switch off the

traction control, for which purpose an LTC ‘off’ button is provided on the switch panel outboard of the steering

column. To switch off the LTC; with the ignition switched on, hold the button pressed for 2 seconds. The button

tell tale together with the instrument panel tell tale will light up amber to conﬁrm system de-activation.

WARNING:

• LTC should always be active when driving on the public highway.

•

If the system is switched off when driving off-highway, be aware of the consequent change in

vehicle behaviour and modify driving style accordingly.

To re-activate LTC, press (momentarily) the button a second time and check that the button and instrument

panel tell tales go out. Note that the button tell tale will ﬂicker in conjunction with the instrument panel tell tale

if traction control is triggered. Irrespective of the system status at the time of ignition switch off, LTC will default

to ‘on’ next time the ignition is switched on.

Variable traction control

Traction control 'off' switch

Rear fog/rain light switch

Engine start button

ohs162

Content .. 129 130 131 132 ..