visit www.apracing.com for installation drawings & up to date product range details 4 INTRODUCTION For over 50 years AP Racing has been a world leader in the technology and manufacture of motorsport and high performance brake calipers. During this period many of the world’s premier races and championships have been won using AP Racing braking sys- tems. With one of the most comprehensive ranges available, AP Racing can offer a brake caliper suitable for every category of motorsport supple- mented with a wide range of brake calipers to suit high performance road car applications for both OE and upgrade conversion kits. The caliper range has been separated into the following groups to aid selection: PRO 5000 ) , Formula Cars, GT, Rally, Touring Cars, 2 Piston, Historic, Motorcycle and Performance Road Car. The calipers shown from pages 5 to 23 are the most popular calipers selected from our extensive range, and will provide the solution to most, if not all, applications. Theses standardised calipers benefit from a more competitive price structure coupled with preferential delivery times. Specialist caliper ranges such as those used in Formula One are not shown in this catalogue. The complete range however includes many other options and the majority can be found on www.apracing.com , so if you require a caliper not illustrated please contact AP Racing for information on availability, price and delivery. BRAKE CALIPERS - General Information CALIPER HANDING - Calipers are available to suit installation in front (Leading) or behind (Trailing) the axle. - The following abbreviations are used in this publication:- ◘ RHT = Right Hand Trailing. ◘ LHT = Left Hand Trailing. ◘ RHL = Right Hand Leading. ◘ LHL = Left Hand Leading. - Bleed screws must always be positioned at the top. - Discs must always pass the small piston first on differential bore calipers. - Cross over pipes must always be positioned at the bottom. STANDARD CALIPER FEATURES ◘ Differential Bores and/or piston positioning are used on all multi-piston calipers to combat pad taper. ◘ High Temperature Seals are standard on all race (competition) calipers. ◘ Hard Anodised Surface Treatment is standard on all competition calipers for optimum durability. (Except iron calipers and where indicated). ◘ Road Calipers have a high performance paint finish applied on top of the hard anodising for maximum durability and protection against road salts and other debris. ◘ Radial Mount fixings are standard unless indicated otherwise. ◘ All road calipers have piston dirt seals to protect against ingress of harmful debris. ◘ Where fitted, all Bridge Pipes on calipers are Stainless Steel. ◘ Most AP Racing calipers are fitted with replaceable Steel Wear Plates to protect pad and caliper body. CALIPER, SEALS & TEMPERATURE Because race brake calipers are sometimes subjected to very high and unpredictable operating temperatures, they must be examined and seals must be replaced on a regular basis to maintain efficiency and safety. Seal life is governed by time at temperature which should therefore be kept as low as possible by provision of cooling airflow. For guidance only, AP Racing offer the following recommendations :- (temperatures measured on outside of Caliper adjacent to logo): ◘ Calipers that regularly run at up to 200°C – Re-seal every other event. ◘ Calipers that run intermittently from 200°C to 220°C and above – Re-seal as soon as possible. ◘ Reduce “soak” temperatures after the car has come to rest where possible (e.g. do not leave foot on brake pedal when stationary with hot brakes) as this can cause excessive caliper temperatures. DESIGN & DEVELOPMENT The whole process of design and development is carried out at our headquarters in Coventry. With our three brake dynomometers we are able to re- produce the most demanding test environments. AP Racing designers use the latest technologies to produce some of the worlds most aesthetic and effective brake calipers at the affordable prices the various markets request. Radi-CAL™ Developed in 2007, this break from traditional design concepts has allowed AP Racing to lead the way in brake caliper design and manufacture, producing over 100 different variants for a cross selection of motorsport, OEM and performance categories. Radi-CAL™ has enabled AP Racing to continue looking at how the design envelope could be used and based its qualities around making calipers lighter, stiffer and run cooler, therefore making them more aesthetic to the eye. ROAD OR RACE ? It is important to choose the correct type of brake caliper for the intended application. The design requirements for a brake caliper to be used on the public highway (Road) or for competition use are significantly different. A road caliper often has to go for long periods without servicing or maintenance therefore corrosion protection and durability are primary considerations. A brake caliper designed for competition use, must be lightweight yet capable of operating reliably at high temperatures, however it is normally cleaned and serviced very frequently. AP Racing produce brake calipers optimised for these two very different applications. Although generally derived from our racing calipers, all AP Racing road calipers have a protective paint finish, wiper (dirt) seals or boot seals to prevent dirt ingress and are of a heavier construction than calipers intended solely for competition use. AP Racing strongly recommends that only purpose designed ‘Road’ calipers are used on vehicles intended for regular use on the public highways. Specified race calipers are for that use ONLY. PART NUMBERING SYSTEM An explanation of a Brake Caliper part number; No. Explanation Description 1. Caliper Family No. Base Caliper No. 2. Stroke No. Even No. = Right hand caliper. Odd No. = Left hand caliper. 3. Position of inlet Adaptor. S = Sidefeed. / E = Endfeed. 4. Anti-knockback Spring. 0 = No spring. / 4 = 4lbs. / 7 = 7lbs / 9 = 9lbs. 5. Piston Material. No character = Aluminium Alloy. L = Stainless Steel. & M = Titanium. 6 & 7 Options . C = Pistons fitted with caps. P = Pistons can accept caps. D = Cooling duct supplied. C P 5 7 8 5 - 2 S 0MP D 1. 2. 3. 4. 5. 6. 7. SERVICING AND RECONDITIONING ◘ Regular examination and maintenance of brake calipers is essential to maintain safety and efficiency of operation. ◘ AP Racing recommend that brake calipers should be cleaned with soapy water only, as this will not damage any of the seals or painted surfaces. ◘ Replacement seals should be soaked in brake fluid for 30 minutes prior to fitment. ◘ AP Racing will no longer supply replacement fluid pipes for road calipers. These must be Returned to AP Racing for replacing. ◘ A complete reconditioning service is available. ◘ Seal repair kits and other spare parts e.g. pistons, bleed screws etc, for calipers detailed, and older obsolete calipers, are available and can be identified by referring to pages 26 to 33: ◘ For more information please contact AP Racing. DRY BLEED SYSTEMS (DRY BREAKS) A Dry Bleed System has been designed for use with any AP Racing calipers suitable for ‘O’ Ring sealed bleed screws. The male dry bleed valve is fitted in place of the bleed screw, once fitted there should be no need to loosen or remove the coupling unless it is being replaced. For detailed information please go to page 83.