Lotus 2004 Eleven Service Notes page 258

Lotus Service Notes
JJ.8A - '08 MODEL YEAR UPGRADE OPTION
Introduced as an option for some '08 models, is an uprated front brake kit, comprising 4-piston front
callipers, larger diameter front discs and steel braided hoses.
Front Callipers:
At each front corner, the A.P. Racing, alloy, 4-piston front calliper is radially mounted to the front hub
carrier via an alloy adaptor bracket. Two reduced head capscrews secure the adaptor bracket to the hub
carrier, with two capscrews with washers securing the calliper to the adaptor. Two retaining pins are used to
locate the Pagid RS14 brake pads, and also secure an anti-rattle spring plate which incorporates a direction of
rotation arrow.
Torque figures: Adaptor to hub carrier; 58 Nm. Calliper to adaptor; 58 Nm. Caliper bleed screw; 17 Nm.
Front Discs:
The front discs are increased in diameter from 288mm to 308mm, and are cooled by internal curved
vanes which trail the normal direction of rotation, to result in distinct RH and LH components. Each disc is
mounted to its hub via an adaptor 'bell' from which it should not be separated under normal circumstances.
Torque of disc to bell mounting bolts; 14 Nm. Note that these discs are fitted only on the front, with standard
discs on the rear.
New thickness of the front discs is 26.00mm; minimum service thickness 25.00mm
Wheel bolts:
In order to provide sufficient clearance between the 4-piston brake callipers and all road wheel options,
the thickness of the disc mounting bell at the hub face is increased from the standard 7mm disc thickness to
11mm. This requires the use of 2mm longer wheel bolts (C117G6000F) to maintain sufficient thread engage-
ment. To reduce the possibility of incorrect fitment, both front and rear wheels are secured with the longer
bolts, with no coded security bolts fitted. Note that these bolts use the standard spline type socket heads, but
have a reduced outside diameter of the head.
Standard bolt; B117G6000F
Long bolt; C117G6000F
Braided hoses:
The steel braided front hoses are connected to the front callipers using a banjo fitting tightened to 25 Nm.
Introduced in June 2008, at approx. '08 M.Y. VIN serial number 1742, the 'big brake' kit fitted to all Exige
S models with the Performance Pack option, has been revised to a Fast Road specification. The differences
may be summarised as follows:
- Single piece iron front brake discs replace separate iron discs and alloy mounting bells;
- Bespoke single piece front callipers replace callipers with separate adaptor brackets;
- Brake pad material change, front and rear;
- Revised braided hoses front and rear;
- Standard wheel bolts (incl. security coding) replace longer versions without security bolt;
For Cup 260 cars, a new Sport brake specification combines the Fast Road front callipers with 2-piece
front discs for marginally better disc cooling, in conjunction with Pagid pad material.
In general, the Fast Road brakes offer significant benefits over standard brakes where full vehicle per-
formance is exploited, primarily through reduced brake fade in conditions of repeated or prolonged heavy
application. Trade offs include a greater susceptibility to noise generation. The Sport brakes, have marginally
better disc cooling via the alloy mounting bells, and use the competition type Pagid pad material. Note that the
new calliper requires a new reduced thickness version of the Pagid pad (A128J0003S). Trade offs include a
greater susceptibility to noise generation, and reduced response when the brakes are cold.
26mm thread length
28mm thread length
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Section JJ
Head outside diameter: 22mm
Head outside diameter: 19mm
Page 13