Brake discs

Lotus OEM Fitment

S1 Elise

MMC

The earliest Elises were fitted with a very lightweight Metal Matrix discs, these discs had an extremely long life expectancy with a very low weight.

The down side of the discs was their fragility at high temprature and poor ability to shed water when driving in rain, often providing interesting moments for the driver if used in anger on a rainy day.

These discs were discontinued due to cost when problems were incurred with the original supplier.

Standard cast iron

Vented S1 OEM Disc

These discs followed the MMC disc as the standard brake disc for the S1 Elise.

Standard discs (Vented)

Lotus Part Number: A111J0128F

Cross drilled

Cross drilled and Vented S1 Disc

Lotus Motorsport discs as fitted to the 111s, Sport 160 and other models (Cross drilled and Vented).

Lotus Part Number: A111J0141F

S1 Exige, 340R

The Lotus Series 1 Exige, and 340R, was equipped with the same cross drilled disks as seen on the Series 1 111s and Sport 160 editions as shown above.

Lotus Part Number:A111J0141F

S2 Elise

288mm Vented Discs

The S2 discs feature longer, curved internal flow passages which increase the disc stability and reduce hot spot formation. The revised hole pattern has been specified to complement the new vane arrangement.

The discs are not handed, so the same disc is used on the right and left hand sides of the car. The cooling air flow through the left and right discs is identical and the flow rate is purely a result of pressure differential between the centre of the disc and its rim; the shape of the vanes and the direction of rotation does not affect the flow rate significantly. Some noise from the brakes themselves is to be expected but there is a fix to stop brake pads banging in the callipers.

Vaxuall VX200

288mm Vented Discs with ABS

Lotus Europa Disc Brakes

288mm Vented Discs with ABS

Elise Upgrade Options

Lotus Motorsport Brake Bias Valve (Part Number:ALS1J6012F) ???

Lotus Motorsport Brake Master Cylinder (Part Number:ALS1J6010F) ???

Lotus Motorsport AP 4 Pot Brake Calipers S2 Only (Part Number ALS1J6002_3F) ???

Elise Parts

Plans Motorsports

Lotus Offical upgrade kit for the Exige S2

Lotus Motorsport supplied bolt on kit that comes with 2 x AP 4 pot alloy calipers with Pagid RS14 Pads and 2 x alloy bells with discs.

Fittings are also included.

Track Use Only

The pads are 16mm thick with an area of 43.2cm2 and are Pagid RS14 ceramic friction material.

They are full race pads with a medium to high friction value.

The discs are 310mm outside diameter and 28mm thick and weigh 4.9kg

The Caliper is a 2 piece aluminium alloy body with 38.10mm diameter piston bores. Weight is 2.3kg

Application is specific to S2 Exige fitted with A122G0007/08F wheels.

Lotus recommend use with braided brake hoses

Other sources of information

Wikipedia on Disc Brakes

Elises.co.uk on S1 Disc Brakes

Elises.co.uk on S2 Disc Brakes

HubSpace.net on Disc Brakes