HOME Disc General BRAKE DISCS Info Ø254mm Ø295mm Vented Discs Ø300mm Ø315mm Vented Discs Ø320mm Ø355mm Vented Discs Ø356mm

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1 BRAKE DISCS & GENERAL INFORMATION. VENTILATED DISCS. SOLID DISCS. VENTILATED DISCS WITH INTEGRAL MOUNTING BELL. VENTILATED DISC, BELL AND PAD KITS. SOLID DISCS WITH INTEGRAL MOUNTING BELL. TEMPERATURE MEASUREMENT TOOLS. CARBONCARBON DISCS.

2 3 BRAKE DISCS - rmation & - DYNOMOMETER TESTING. INTRODUCTION. The AP Racing range of ventilated and solid brake discs have been developed with the benefit of unparalleled experience in brake technology, meet the severe demands encountered under Race, Rally and Road conditions. RACE: Our extensive range includes discs suit all of the most demanding series in the world. Teams competing in F3, WRC, GT and Sports Protypes, Nascar and Touring Car Championships use AP Racing discs. ROAD: As well as our successes on the circuits and stages of the world, AP Racing has developed disc braking systems for many leading volume and specialist High Performance vehicle manufacturers including Asn Martin, Bugatti, Caterham, Ford, HSV, Koenigsegg, Morgan, Lotus, Seat and TVR, name a few. DESIGN. AP Racing share innovations in the R&D processes between Race and Road projects, the basic function is the same for both although each has different service requirements. Race are submitted high braking and thermal loads. These loads are repeated frequently over many laps or stages. The service life is short and noise and comfort are not really an issue. Race discs normally employ a separate disc and bell assembly which are generally available in two types: - Light Duty - 2 piece bolted assemblies. - Heavy Duty - 2 piece floating assemblies. A given disc has fit many different cusmer cars, so they require cusm mounting bells. Road however have relatively low and infrequent loads, although mass increases compared race cars which generates high braking rques. Road have comfort and long service life requirements. Costs of each item also have remain low for the OEM and the end user when replacement time arrives. For road cars, many applications use 1 piece disc and bell assemblies, this is due high volume production requirements. High performance vehicles and Big Kits usually use 2 piece bolted assemblies, enabling fit a heavy duty closer race than road disc. - Light Duty - 1 piece disc and bell assembly. - Heavy Duty - 2 piece bolted assemblies. RE AND DEVELOPMENT. Over the last nine years AP Racing has placed increased emphasis on advanced research and simulation complement the existing technology, test and manufacturing processes of our competition and road discs. Product improvement is continuous, using feedback from our state of the art dynamometer and track testing AP Racing are able offer brake discs with optimum performance and cooling characteristics for any application. - DEVELOPMENT TOOLS. AP Racing is equipped with state of the art design ols which have enabled us study disc performance a level not hither possible. FEA: CFD AND THERMAL STRESS ANALYSIS. Thermal simulation enables assessment of brake disc cooling without having build costly protypes. AP Racing has reached a high degree of confidence using these methods and has adopted FEA as the base of our design process, this enables AP Racing tailor disc design a given application. - R&D EXAMPLES. The latest example of how our disc development department has benefited the AP Racing disc range. Not everything can be modelled yet, so validation testing is essential. Our proven dynamometer, has been supplemented by a second, more powerful machine equipped with state of the art features. Two fully operational dyno s give us even more significant test capabilities and help us demonstrate that AP Racing brake discs are the best. AP Racing dynamometer plots provide data examples such as temperature and Friction Co-efficient comparison. NUMERICAL SIMULATION. AP Racing has continued develop a unique thermal simulation software, in order predict overall brake system temperatures on a real life cycle. This simulation is particularly useful for selection of brake specifications, and wear predictions for endurance races. It is able calculate bulk temperatures and compare different brake system solutions for various vehicles and race tracks. DISC CHOICE. The choice of a particular size and type of disc will depend on the characteristics of the vehicle. Experience with the type of installation or racing format is very important. AP Racing has a wealth of experience of all types of racing and our Section will be pleased advise on disc choice. Some of the main considerations in this choice are: HOMOLOTION AND REGULATION. In Group A and certain other classes of racing, brake equipment is restricted that Homologated by the manufacturer with the FIA. Where applicable you must therefore choose a disc size type which has been Homologated. E.g. only grooves are allowed in Formula 3. DISC DIAMETER AND THICKNESS. diameter and thickness are major facrs in basic spping power. Usually the largest diameter disc that can be installed in a particular wheel profile is chosen maximise braking power unless low weight, poor tyre adhesion or required brake balance dictate otherwise. thicknesses normally increase with disc diameter and in proportion vehicle weight and hence work done and cooling required. Standard disc sizes should be used wherever possible as this improves availability. DISC RUBBING DEPTHS (SWEPT DEPTH). It is important match the swept area of the disc the Pad Caliper combination that is intended be used, avoid any large cold areas which could lead disc disrtion. To make this easier the radial depth of all AP Racing brake pads is incorporated in the part number (the D Number e.g., & ). Normally the Pad Caliper is positioned so that the p edge of the pad is level with the nominal disc outside diameter. However it is normal make the eye diameter on the inboard face (Non mounting side) slightly smaller in diameter than the mounting side match the thermal characteristics of the two disc faces and avoid disrtion in use. The amount of this under-hang will vary according the installation and is part of the disc designers art, but analysis carried out by AP Racing shows that 2mm radius (mm on diameter) is sufficient in most cases. N.B. THE PAD SHOULD NEVER OVERHANG THE DISC AS THIS WILL LEAD TO A NUMBER OF BRAKING DIFFICULTIES. DISC HANDING. RIGHT LEFT HAND IDENTIFICATION Most AP Racing brake discs feature curved vanes and are handed. They should be installed with the cooling vanes running back from the inside outside diameters in the direction of rotation as indicated in the sketch. DISC ROTATION DISC ROTATION - SINUSOIDAL ( S VANE) DISC CASTING A Sinusoidal Vane cast iron disc has been developed for Nascar, with others due follow in Touring Car, GT and Rally Car applications. Utilising the development ols available our R&D department were able design a new casting run between 70-0 C cooler than the old designs, the new S Vane disc provides a significant improvement in brake performance, wear rate and reliability. VEHICLE DIRECTION LEFT HAND DISC Visit for full & up date product range RIGHT HAND DISC 201

3 35 BRAKE DISCS - Ventilated - & DISC LISTINGS. The variety of disc options available provide the solution for virtually every Racing and High Performance Road application. The discs illustrated in these sections are a selection of discs from the range and have been listed by diameter, thickness and mounting details for convenience. If you are unable satisfy your requirements from the discs listed then please contact AP Racing Section for guidance. VENTILATED BRAKE DISCS. This section on ventilated brake discs provides dimensional details, as well as information on face types and the weight of the most popular discs from the AP Racing disc range. Not all discs are listed, should you require a disc with particular dimensions which is not listed please contact the AP Racing Section for assistance. which are highlighted are from the preferred disc range, which offers improved availability and pricing. Please contact AP Racing if you require more information. Nominal Dimensions in (mm) Mounting Details Fixing Type. B SBobbin = Standard Outside Thick- M CP9. ness P.C.D. HBobbin = Heavy Duty C (Eye) D Inside H Mtg. Max Face Air Weight Pad of Types Gap. Kg. Depth. Vanes. Available. Comments. Part Numbers. CP135 or CP SBobbin C C CP CP D C C CP37707 CP CP1-9 CP1- CP-319 CP CP SBobbin SBobbin SBobbin D3 D32 D P C C C CP CP37705 CP CP SBobbin SBobbin SBobbin SBobbin Sbobbin SBobbin SBobbin D2 D3 D2 D2 D2 D1 D SBobbin SBobbin SBobbin SBobbin C C D C C C C.0.0 CR 3..5 C RD RDP C RD C CRRA CP1-5 CP1- Mtg flange stepped in 1.2mm CP-227 CP1- Bobbin CP9-595MA Mtg flange stepped out 0.1mm Mtg flange stepped in 2.5mm Bobbin CP9-595MA Bobbin CP9-595MA Pro 5000 ). Bobbin CP9-592MC Pro 5000 ). Mtg flange stepped out 1.2mm Pro 5000 ). Mtg flange stepped in 1.2mm Bobbin CP9-50MP Pro CP9-592MC Mtg flange stepped in 1.27mm Bobbin CP9-592MC Pro Bobbin CP9-131MD Bobbin CP9-50MP CP CP397-9 CP37709 CP CP CP51-23 CP3-23 CP CP-77 CP-209 CP-7523 CP-159 CP-75 CP-101 CP-21 CP CP CP-57 CP CP-507 CP CP525-5 CP-29 CP CP CP3-97 CP3-27 CP CP-01 CP3-95 CP CP CP CP CP CP CP Visit for full & up date product range Previous View

4 BRAKE DISCS - Ventilated - Nominal Dimensions in (mm) Mounting Details Fixing Type. B SBobbin = Standard Outside Thick- M CP9. ness P.C.D. HBobbin = Heavy Duty D C (Eye) Inside Mtg. Face Max Air Weight Types Pad of Gap. Kg. Available. Depth. Vanes. H Comments. Part Numbers. CP135 or CP SBobbin SBobbin D7 D SBobbin SBobbin D55 D D7 D D D D7 D D D59 D0 D0 D & SBobbin P RA CG5 CCG P RD Brembo mounting Bobbin CP9-593MB CP3-7 CP CP3-91 CP CP CP CP3-27 CP3-939 CP CP CP3-529 CP CP CP CP350-7 CP307-7 CP CP525-7 CP CP CP CP CP525-7 CP CP CP CP CP D C CP3-923 CP350-3 CP CP CP CP350-5 CP CP CP CP CP C C.9 Pro & ) Mtg flange stepped out 0.1mm CP CP CP1-5 CP RD CP SBobbin D52 C CP CP CP D5 D55 D SBobbin SBobbin SBobbin SBobbin SBobbin SBobbin 2 2 SBobbin SBobbin D5 D7 D SBobbin D SBobbin SBobbin SBobbin D C C C CGPRD C C C SBobbin SBobbin SBobbin D55 D C CG5 CG Visit for full & up date product range P C C C C CRD CR C C C C D DRA Bobbin CP9-50MP Bobbin CP9-50MP Pro & ). CP is a Pro 5000 ) Bobbin CP9-59MJ Pro Bobbin CP9-59MJ Bobbin CP9-50MP Pro Bobbin CP9-59MJ Bobbin CP9-591MH CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP CP , Bobbin CP9-59MJ Mtg flange stepped out 0.75mm S100 Mtg flange stepped out 2.5mm, Brembo Mtg Bobbin CP9-59MJ CP CP CP CP CP CP CP CP CP52-7 CP Previous View

5 37 BRAKE DISCS - Ventilated - Nominal Dimensions in (mm) Mounting Details Fixing Type. B SBobbin = Standard Outside Thick- M CP9. ness P.C.D. HBobbin = Heavy Duty D C (Eye) Inside Mtg. Max Face Air Weight Pad of Types Gap. Kg. Depth. Vanes. Available. H Comments. Part Numbers. CP135 or CP701 & SBobbin SBobbin D CG C CRA C RA C 22. SBobbin S CG P C C P C C CD C GDT2 RA RA Bobbin CP9-592MC Bobbin CP9-59MJ S Vane Bobbin CP9-59MJ CP CP CP CP CP3-209 CP CP CP SBobbin 0.0 SBobbin 0.0 SBobbin SBobbin SBobbin S D1 D CG CG RDT2 CP CP52-13 CP57-19 CP D RA CP371-9 CP PRA 3 BREMBO MTG PRA CPRA RC PRA SBobbin D SBobbin D D S SBobbin 5. 25, Bobbin CP9-59MJ, Bobbin CP9-59MJ Pro 5000+, Bobbin CP9-59MJ S Vane Bobbin CP9-50MP CP57-03 Mtg flange stepped out 1.0mm CP57-5 CP CP Bobbin CP9-59MJ CP Mtg flange stepped out 1.0mm, G CR C C CP CP CP CP CP CP3-301 CP CP C S Vane Bobbin CP9-59MJ , Bobbin CP9-59MJ CP is a Pro 5000 ) CP9-301 SBobbin SBobbin 22.0 S S Vane Bobbin CP9-59MJ CP HBobbin SBobbin Bobbin CP135-FP CP-2099 CP SBobbin SBobbin C CCR RA 0.0 SBobbin S.9 RA CP HBobbin C S Vane Bobbin CP9-59MJ Wide Bobbin CP MS SBobbin SBobbin D C CRRA Bobbin CP9-59MJ CP CP CG CG CG C CG D C D D Bobbin CP9-59MJ CP CP CP CP CP CP57-19 CP CP CP CP CP CP CP CP CP9-117 CP Pro & ) C Bobbin CP9-59MJ Bobbin CP9-59MJ CP is a Pro 5000 ) CP CP301 CP5701 CP CP Pro 5000 ) CP CP-23 CP-13 CP CP-135 CP095-5 Heavy Duty CP Visit for full & up date product range

6 3 BRAKE DISCS - Ventilated and Ventilated with Integral Bell VENTILATED DISC AND OR BELL KITS. Important Note: CP00 Kits do not include mounting bells. These need be purchased separately, Bobbin Kits are included. Audi Strap Drive Replacement OE Kits Application RS - B7 Front. - Ø5 x 3mm disc fits OEM Brembo Pisn Caliper. - RH = CP00Z1SD LH = Z15SD - Mounting Bell = CP00Z10. RS - C5 Front. - Ø5 x 3mm disc fits OEM Brembo Pisn Caliper. - RH = CP00Z1SD Z15SD - Mounting Bell = CP00Z11. RS - C Front. - Ø390 x mm disc fits - RH = CP00ZCG LH = Z25CG OEM Brembo Pisn Caliper (200-20) - Mounting Bell = CP00Z0. Note:On the Strap Drive kits for Subaru and Mitsubishi Evo installations the AP Racing kit requires a shallower pad than the original pad enable them clear the strap drive system. &. RS - C Rear. - Ø35 x 2mm disc fits OEM Caliper. - RH = CP00Z2CG LH = Z27CG - Mounting Bell = CP00Z20. R - Front on - Ø5 x 3mm disc fits OEM Brembo Pisn Caliper. R - Rear. - Ø355 x 32mm - Directly replaces standard Ø355 x 32mm, 2 Piece disc with OEM calipers. Installation Note - OEM Caliper Noise bar must be removed for disc mounting bolt clearance. - RH = CP00ZSD LH = Z9SD - Mounting Bell = CP00Z0. Ford Focus RS Mk2 (2009 on). - Ø3 x 2mm disc. - RH = CP00Y1C LH = Y19C - Mounting Bell = CP00Y GT-R, R35 - Front 2011 on - Ø390x3mm disc. - Face types available include CG, & GT-R, R35 - Front Ø37x3mm. - Face types available include CG, & SD Mitsubishi GT-R, R35 - Rear 200 on - Ø37x30mm disc. Evo 7 9. Fitted with CP90-009MNP.T2 Brembo pots. Grooved disc - Face types available include CG, & SD CP90-009M.T2 - Grooved Part No = CP YNP.CG. - Grooved Part No = CP590-03YNP.CG. Mitsubishi Evo X. Fitted with Brembo pots Subaru - Other face types available include - CG - Plain Part No = CP YNP.P and Bell OE Replacement Kits CP90-007MNP.C CP90-007M.C VW Golf MKV R on. Previous View - RH = CP00YCG LH = Y11CG - Mounting Bell = CP00Y0 SD. CP90-001MNP. Impreza 01 on & Including N1 models. Fitted with Brembo Pot. - RH = CP00Z50SD LH = Z51SD - Mounting Bell = CP00Z500. Nissan, Bell & Pad Kits. Audi S3 (P) in the Bell Replacement OE Kits AP Racing now produce disc and bell kits as aftermarket alternatives for OE discs. These kits are designed replace the standard single piece disc and retaining the vehicles production brake caliper. The kits include either strap drive, bolted or floating discs andor bell assemblies (see tables below & opposite) and for the kits with pads a set of Ferodo DS2500 material. Ford Focus RS MK1 CP BNP.C Renault Megane 225. CP BNP.C CP90-001MNP. VENTILATED BRAKE DISCS WITH INTEGRAL MOUNTING BELL. This section on ventilated brake discs with integral mounting bell provides dimensional details, as well as information on face types and the weight of the most popular discs from within the ventilated integral disc range. Not all discs are listed, should you require a disc with particular dimensions which is not listed please contact the AP Racing Section for assistance. Nominal Dimensions in (mm) Mounting Details C Thickness M Max Pad Depth. Weight Kg. Face Types. Part Number. 3.2 D1.3 CP CP D52. CP CP D D F G Eye Mtg Thickness. Mtg Offset E Spigot Internal Outside B P.C.D. Visit for full & up date product range SD P CP700- CP

7 39 BRAKE DISCS - and with Integral Bell SOLID BRAKE DISCS. This section on solid brake discs provides dimensional details, as well as information on face types and the weight of the most popular discs from within the solid disc range. Note: Not all solid discs are listed, should you require a disc with particular dimensions which is not listed please contact AP Racing Section for assistance. Nominal Dimensions in (mm) Mounting Details B Fixing Outside Thick M ness Type. P.C.D. C D Eye Inside H Mtg.. Max Pad Depth. Face Types Available. Weight Kg D Part Numbers. Comments. Mtg Stepped out 2.0mm Mtg Stepped out 0.75mm CP2-215 CP2-21 CP2-20 CP D D P D P Bobbin CP9-593MB CP2-195 CP2-21 CP2-179 CP2-193 D D CP2-17 CP2-192 CP D D C D 2.5 Bobbin CP9-593MB Bobbin CP9-593MB Bobbin CP9-595MA Bobbin CP9-595MA Bobbin CP9-593MB Pro Bobbin CP9-595MA Bobbin CP9-59MJ CP2-239 CP2-23 CP2-19 CP2-223 CP2-177 CP CP2-0 CP2-237 CP2-200 DP CP2-19 SOLID BRAKE DISCS WITH INTEGRAL MOUNTING BELL. & This section on solid brake discs with integral mounting bell provides dimensional details, as well as information on face types and the weight of the most popular discs from within the solid integral disc range. Not all discs are listed, should you require a disc with particular dimensions which is not listed please contact the AP Racing Section for assistance. Nominal Dimensions in (mm) Max Pad Depth. Weight Kg. Face Types. Part Number. 2. P CP P CP2222- CP P CP07-9 Mounting Details C D E F Thickness M Spigot Mtg Face Mtg Thicness. Mtg Offset D52 3. Outside B P.C.D. 201 Visit for full & up date product range Previous View

8 0 BRAKE DISCS - Castings and Face Types More & DISC CASTING TYPES. DISC FACE TYPES. Details of the various disc castings types available from AP Racing are given below help you choose the correct disc for your application. NB. AP Racing do not supply unmachined castings, as all disc go through special heat treatments processes during manufacture. Grooves and sometimes cross drilling are normally used on all racing brake discs clean the surface of the pad & allow gases produced escape. In doing so the friction characteristics are modified. Different groove and drilling patterns affect the friction characteristic in different ways, some affect overall friction and others the bite or release characteristics & therefore the best solution is not necessarily the same for each application. AP Racing is constantly developing and refining disc face patterns and new variations will be introduced from time time. The most popular face types are detailed below and the page opposite. N.B. Not all Face Types are available for every disc. CP2222 CP07 CP2 with IntBell Max Dia = Ø20mm Max Thickness = 22mm with IntBell Max Dia = Ø27mm Max Thickness = mm Max Dia = Ø30mm Max Thickness = mm CP259 CP307 CP3575 Ventilated with IntBell. of Vanes = 30 Air Gap = 15mm Max Dia = Ø20mm Max Thickness = 21mm of Vanes = Air Gap = mm Max Dia = Ø33mm Max Thickness = 32mm Ventilated with IntBell. of Vanes = Air Gap = 1mm Max Dia = Ø330mm Max Thickness = mm CP350 CP351 CP371 of Vanes = Air Gap = 1mm Max Thickness = 2mm of Vanes = Air Gap = mm Max Dia = Max Thickness = mm of Vanes = Air Gap = mm Max Dia = Ø37mm Max Thickness = mm CP3770 CP371 CP37 of Vanes = Air Gap = mm Max Dia = Ø25mm Max Thickness = 1mm of Vanes = Air Gap = 1mm Max Dia = Max Thickness = mm of Vanes = Air Gap = 1mm Max Dia = Ø30mm Max Thickness = mm CP3 CP337 CP37 of Vanes = Air Gap = mm Max Dia = Ø30mm Max Thickness = mm of Vanes = Air Gap = 1.5mm Max Thickness = mm of Vanes = Air Gap = 20mm Max Dia = Ø32mm Max Thickness = 32mm CP0 CP370 CP3930 of Vanes = 0 Air Gap = 1mm Max Dia = Ø3mm Max Thickness = mm of Vanes = 30 Air Gap = mm Max Dia = Ø33mm Max Thickness = mm of Vanes = 70 Air Gap = 1mm Max Dia = Ø330mm Max Thickness = mm,,g & G = Grooved. (Straight forward facing). The number specifies grooves per face. Traditional style groove C,C,CG & CG = Curved Grooves. (Backward facing). The number specifies grooves per face. Standard pattern. CP397 CP39 CP095 of Vanes = Air Gap = 21mm Max Thickness = mm RD = Radiused Drilled. of Vanes = 73 Air Gap = 19mm Max Dia = Max Thickness = mm (Cross drilled but with radiused run out reduce noise & improve life compared with standard cross drilling. Usually used on Road applications. CP1 CP1 CP2 Ventilated Straight Vane. of Vanes = Air Gap = mm Max Dia = Ø25mm Max Thickness = 2mm of Vanes = 1 Air Gap = 20mm Max Thickness = 2mm of Vanes = Air Gap = 1mm Max Thickness = 30mm CP CP3 CP37 of Vanes = Air Gap = 21mm Max Dia = Max Thickness = mm of Vanes = Air Gap = 9mm Max Dia = Max Thickness = 2mm Ventilated with IntBell. of Vanes = Air Gap = 1mm Max Dia = Ø37mm Max Thickness = 0mm P = Plain. (No grooves or holes). Mainly used for road cars where low noise is vital. of Vanes = 7 Air Gap = mm Max Dia = Max Thickness = 22mm Previous View CP CP70 CP50 of Vanes = Air Gap = 11mm Max Dia = Max Thickness = mm of Vanes = 70 Air Gap =.5mm Max Thickness = 2mm of Vanes = 2 Air Gap =.2mm Max Dia = Max Thickness = 22mm CP52 CP70 CP55 of Vanes = Air Gap = mm Max Dia = Ømm Max Thickness = 32mm of Vanes = 70 Air Gap = 22mm Max Thickness = 3mm Ventilated with IntBell. of Vanes = Air Gap = mm Max Dia = Ø22mm Max Thickness = 23mm CP515 CP525 CP57 of Vanes = 5 Air Gap = 20.5mm Max Dia = Ø33mm Max Thickness = mm of Vanes = 5 Air Gap = 1mm Max Dia = Ø33mm Max Thickness = 32mmm of Vanes = Air Gap = mm Max Dia = Ø30mm Max Thickness = 0mm CP5775 CP591 CP0 of Vanes = Air Gap = mm Max Dia = Ø37mm Max Thickness = 33mm of Vanes = Air Gap = 13.5mm Max Dia = Ø30mm Max Thickness = 32mm of Vanes = Air Gap = 25.5mm Max Dia = Ø30mm Max Thickness = 2mm CP9 RP55 RP7177 Ventilated S Vane. of Vanes = Air Gap = mm Max Dia = Ø30mm Max Thickness = 0mm of Vanes = Air Gap = 13.5mm Max Dia = Ømm Max Thickness = 32mm of Vanes = Air Gap = 17mm Max Dia = Ø390mm Max Thickness = mm running out on OD clear debris. Only used on thick wall discs). The number specifies grooves per face. D & SD = Cross Drilled. (Drilled holes chamfered). Still preferred with some pad materials but can compromise disc life. GD = Grooved & Drilled. Usually used on Road applications. PG = Partial Groove. Shorter length groove pattern RA = J Hook Design. Gives improved bite and debris clearance and reduces disrtion vibration, outer grooves run out OD. Thick wall discs only = J Hook Design. Latest design gives improved bite & debris clearance & reduces disrtion vibration, outer grooves do not run out OD. RC = J Hook Design. As RA design but with 3 hooks across face. This design gives improved bite and debris clearance and reduces disrtion vibration. Thick wall discs only Visit for full & up date product range CR, CR, CR & CR = Curved Grooves. (Backward facing T2= Continuous Grooves. Two continuous grrooves per face. Usually for road and Kit apllications. 201

9 1 BRAKE DISCS - Mounting More DISC MOUNTING. Most racing and many high performance road brake discs are designed be mounted on the hub or stub axle by means of a mounting bell. Mounting bells are usually made from high grade Aluminium alloy although other materials can be used. This arrangement is much lighter than a one piece disc and bell, but more importantly allows some compliance reduce the risk of disrtion due heat expansion of the disc. This becomes more important the larger the disc and is considered essential above Ø330mm diameter. There are essentially two methods of attaching the disc the bell, and. The method be used will depend on the particular application. & Individual Bolt, Nuts and Washer Components in boxes of 0. For lower duty applications and on smaller discs a bolted mounting is sometimes preferred for strength and simplicity especially for off-road application (e.g. Rallies) where debris may clog a floating mechanism leading run-out and disc vibration. Stiff flat bells should be avoided with a bolted mounting. Standard AP Racing disc mounting hole size is 0 5mm diameter. AP Racing offer a range of bolts, nuts and washers suit. These are also available in wheel set kits, see below for details. BRAKE DISC CP WASHER CP35-0 LOBE 0.25 UNF BOLT CP UNF NUT. MOUNTING BELL.75 Long Bolt. E - -Lobe Head Type Part Nos. CP35-0K0 Alternative Cap Head Type Part Nos. CP9-11K Long Bolt. CP35K0 CP9-71K Long Bolt. CP35-2K0 CP9-331K0 Nut. CP9-117K0 Washer. CP9-1305K0 Component. BOLTED. NOTE: Bolts, nuts and washers are not available separately, but can be purchased in boxes of 0. - The Cap Head bolt will continue be available as a loose part in kits of 0. N.B. BOLTS, NUTS AND WASHERS NOT SOLD INDIVIDUALLY FLOATING. for heavy duty applications, especially larger discs, should be mounted allow some axial & radial float between disc & bell. This may be achieved by the following methods: Float in the bell, Float in the disc or Strap Drive. Radial float allows differential expansion of disc and bell thus reducing stresses in the disc and minimising disc cracking and disrtion. The idea of axial float is compensate for a certain amount of stub axle upright flex by allowing the disc take up its ideal position within the range of float thus avoiding Knockback of the caliper pisns. However the float should not be excessive as disc gyroscopic loads can cause the same effect that the float is meant alleviate. The amount of axial float will depend somewhat on the application. In a perfect system with minimal disc movement relative the Caliper the amount of float need only be around mm. FLOAT IN THE BELL. The AP Racing Float in the Bell system has the advantage of being used with standard bolted discs, float is controlled by bell thickness. During use some wear of the bell inevitably occurs which tends increase float and requires more frequent Bell replacement than the Float in the system. BOLTS AND BOLT KITS. E - Lobe Headed Bolt kits available for AP Racing discs are given in the table below. The Lobe bolt offers the following advantages over a cap head: - More positive drive. - More consistent clamping loads. - Lighter. - Better corrosion resistance - Less prone damage. - Improved airflow. Recommended bell flange thickness for use with this bobbin is give mm float..25 EFFECTIVE.20 BOBBIN LENGTH CP WASHER RECOMMENDED FLOAT BRAKE DISC L1' BOLT DIMENSIONS. AP Racing recommend a bolt nut tightening rque for a disc and bell of 1Nm (Lbft). NOTE CP9-117 NUT TIGHTENING TORQUE -1Nm (lbft) L2' CP015MA BOBBIN MOUNTING BELL Bolt Dimensions and Part Numbers. (Dim n in mm) Bolt Part CP35-0 CP35 CP35-2 Dim n L Dim n L2 Bolt Part Dim n L1 Dim n L2 9.5 CP E, -LOBE HEAD BOLT KITS (All Bolts ¼ UNF). Kit Part of Bolts in kit. Bolt Part CP35-0K0 CP long. CP35-2K CP long. CP35-0K CP long. CP35K CP long. CP35-2K CP long. Each of the above kits contain the required number of CP9-117 Nut & CP washer. Note: 3 E, -Lobe Socket - CP9-153 is available NOTE: THE CORRECT ORIENTATION OF BOBBINS CP35-2 BOLT CP015 Float in the bell Bobbins. The bobbin for use with float in the bell mounting is CP015MA Ø HOLE 5 Ø 0 THRU R0. MAX ALL ROUND IDENTIFICATION LETTER TO BE CLEARLY MARKED WHERE SHOWN AS LARGE AS POSSIBLE Bobbin kit CP015K CP015MA bobbin can be bought separately or in a kit which contains the bobbins, bolts, nuts & washers. Visit for full & up date product range 201

10 2 BRAKE DISCS - Mounting HEAVY DUTY WIDE BOBBINS. The AP Racing Float in the system uses a disc with an elongated flat sided mounting hole. The harder disc is less prone wear than the bell but regular maintenance cleaning is required if float is be maintained at the original level. N.B. Mounting bell thickness.00mm Max but is typically mm AP Racing offer two options of wide bobbins for heavy duty disc arrangements offering improved stability in high rque applications. - CP135 a forged one piece bobbin & stud providing improved and unrestricted airflow. (Replaces CP015 bobbins). - CP701 a two piece alternative for thicker mounting bell flanges, using separate bolt. The drawings and tables below provide all information required aid the user. DISC FLANGE THICKNESS BRAKE DISC 0.90 Note: Special ol available, CP assist bobbin orientation whilst assembling both CP135 and CP701 bobbiins. CP WASHER CP135 - Forged One Piece Bobbin & Stud. BOBBIN LENGTH (SEE DRAWING BELOW) ¼UNF KAYLOCK NUT & STEEL WASHER 50 ALTERNATIVE ARRANGEMENT REVERSE BOBBIN Float in the disc bobbins. The float in the disc bobbins available for AP Racing floating discs are given in the table below. - All bobbin kits comprise either, CP35-0, CP35 bolts, CP9-117 nut and CP washer and the specified bobbin. UNRESTRICTED AIRFLOW FLOAT CP701 - Two Piece BobbinBolt Alternative. L1' L2' 0 TYP Bobbin Part CP9 Nom Dim n L. Float MA MB MC MH -131MD MJ ML -132MM MP Kit Part CP9-595K0(S) -595K -593K -593K -592K -592K -591K -131K -59K0-59K -59KL -2K -132K -50K -50K -50KL 1 HOLE Ø5 THRO R0. B Note: bobbin kit with L suffix denotes longer CP35-2 bolt in kit. DISC FLANGE THICKNESS MTG BELL FLANGE THICKNESS WASHER 0.90 ¼ UNF LOBE BOLT 7.20 Cp701 TYPE BOBBIN FLOAT = L - DISC FLANGE THICKNESS (TYPICALLY 0.25 TO MM NOM) CP701 Bobbin & Bolt Part Numbers. (Dim n in mm) Nominal Ident Bobbin Stud Thickness Float Letter Part M CP701-0MM V CP701-MV X CP MX S CP MS Bobbin kits available. Please contact AP Racing for details Dim n L Bolt dimensions and Part Numbers. (Dim n in mm) Bolt Part CP35-0 CP35 CP35-2 Visit for full & up date product range Y BOBBINS HAVE A LETTER STAMPED ON THEM THAT CORRESPONDS TO THE LAST LETTER IN THE PART No -2-2 Ø13.25 B BOBBIN LENGTH L' A Ø15 (¾ STK) Bolt. Part CP35-0 WASHER CP A Bobbins & kit Part Numbers for Float in Mounting. (Dimensions in mm) Thickness ¼ UNF LOBE BOLT R0. MAX ALL ROUND Tightening rque for bolts is 1Nm (lbft)..0 Dim n Dim n Nominal Ident Bobbin Stud L Thickness Float Letter Part C CP135-2FC E CP135-3FE D CP135-FD M CP135-5FM P CP135-FP R CP135-7FR S CP135-FS Q CP135-9FQ Bobbin kits available. Please contact AP Racing for details 11. Ø.90 Ø0 5 (1 HOLE Ø0 THRU) CP135 Bobbin & Stud Part Numbers. (Dim n in mm) REVERSING THE BOBBIN AS SHOWN MOVES THE DISC C L 2.5mm INBOARD RELATIVE TO THE BELL L MOUNTING BELL CP9-117 NUT TIGHTENING TORQUE 1Nm (LbFt) & R KAYLOCK NUT CP319- OLD BOLT HEAD CP WASHER Ø1.0 x 1.0 THICK BOBBINS HAVE A LETTER STAMPED ON THEM THAT CORRESPONDS TO THE LAST LETTER IN THE PART DISC.13 NORMAL RECOMMENDED ARRANGEMENT FORGED WIDE BOBBIN WITH ¼ UNF THREADED STUD CP9-117 NUT MOUNTING BELL 5 REF IDENTIFICATION LETTER FLOAT DIMN 1 CP35 LOBE BOLT DIMN L 2.50 STANDARD BOLTED MOUNTING BELL 0.00 VENTED DISC WITH WIDE BOBBIN FLOAT SYSTEM More STANDARD FLOAT IN THE DISC BOBBIN. DIM L Dim n L Dim n L2 Bolt Part Dim n L1 Dim n L2 9.5 CP CP

11 3 BRAKE DISCS - Operating Advice & Part Numbering & DISC OPERATING ADVICE. DISC TEMPERATURES. In order achieve optimum racing brake performance and prolong disc life it is essential that the brakes operate at the correct temperature. In general discs should run at similar temperatures front and rear and from side side, dissimilar temperatures will lead varying brake balance. Temperature balance can be checked as soon as the car sps in the pit lane using a Pyrometer such as AP Racing Pyrometer kit CP20- (see below). However a pyrometer reading is not a good indicar of disc operating temperature which decays rapidly with time when the brakes are not being applied. Under racing conditions disc bulk temperatures should normally be maintained in the range 00 C 00 C for best performance. face peak temperatures may be higher but should not exceed the maximum recommended for the pad material being used. An effective method of checking maximum disc operating temperature is by using temperature paints applied the disc. A suitable paint kit can be obtained under AP Racing Part CP29-1, this kit contains three paints, Green (30 C), Orange (50 C) and Red ( C) plus thinners and brushes. When assessing brake temperatures it is important complete several successive laps (5 or preferably ) at race speeds and vehicle weight allow temperatures stabilise at a representative level. Typically when running within the correct temperature range the Green paint (30 C) will turn throughout, the Orange paint (50 C) 50% 0% throughout and the Red paint ( C) turned up 5mm from each brake face. If the Red paint ( C) turns throughout, the discs are running o hot. Circumferential disc face ridges are also an indication of running o hot. Circuits and drivers vary enormously in the amount of work they demand from the brakes and therefore the brake system has be tuned for each circuit by adjustment of the cooling airflow. The temptation over cool the disc should be resisted. The aim is keep the temperature as stable as possible within the working temperature range. High maximum low minimum temperature cycles are the enemy of disc life and cause performance variations. DIGITAL READ-OUT PYROMETER CP20- Digital pyrometer for brake, disc and tyre temperatures. High accuracy display reads in centigrade. The unit comes complete with probes for both brake discs and tyres in a heavy duty carry case. THERMAL PAINT KITS CP29-1 kit comprises of three paints for moniring peak temperatures. The three paints are:- Green changes colour White at 30 C. - Orange changes colour Buff at 50 C. - Red changes colour White at C. The kit also comprises, one bottle of thinners and three brushes. RACE CAR INSTALLATIONS: 1) If ducts are fitted they should be ¾ blanked off. 2) Use previously bedded pads. 3) For a minimum of 15Km use brakes gently at first from initially low speeds - Progressively raise speed normal racing speed but still using gentle applications. ) For the final 2 or 3 applications brakes can be used quite heavily. 5) If AP Racing thermal paints are used then only the Green paint (30 C) should have fully turned white and maybe also just the Orange paint (50 C) on the outside edges of the discs during the bedding procedure. ) Allow cool. 7) AP Racing offer a pre-bedding service at nominal extra charge. This ensures that discs are bedded consistently assuring better performance & life. Contact AP Racing for details. ROAD CAR INSTALLATIONS: 1) For the first miles, light braking from 500 mph down 30 mph if possible in blocks of 5. Do not attempt any high-speed sps down zero at this point, as only the faces will heat up with the mass remaining cool along with the mounting area. 2) For the next 0 miles increase the braking pressures similar spping in traffic, again avoiding if possible full sps from above 70 mph. By now the area around the mounting bolts should be a light blue temper colour. This is a good indication that the correct heat soak has been achieved. 3) For the next 0 miles gradually increase the braking effort after this full power sps can be used. The disc should now be an even dark light blue temper colour, depending on the pad type and the braking effort being used during the process. This process must be completed before any race circuit use. Track Day Use: For the latest Track Day Bedding Instructions visit our website: PART NUMBERING. PART NUMBERING EXPLANATION Basic (casting) Type Face Suffix (see below) CP351-2 C B1 Stroke Number Bedding (if applicable) HANDING - Even Stroke Numbers are Right Hand - Odd Stroke Numbers are Left Hand BRAKE CALIPER TEMPERATURE STRIPS CP Temperature indicar strips for moniring caliper temperatures. - Temperature range 19 C 20 C - Each packet contains strips. TEMPERATURE RECORDING PAD CP20-25 Allows the user record temperature data for and Calipers. DISC COOLING. All cast iron brake discs need be bedded-in ensure heat stabilisation and improve resistance cracking. Cracks or even disc failure can occur during the first few heavy sps if careful bedding is not carried out. AP Racing recommend the following procedures or visit for the latest advice. When ordering discs please use the correct part number wherever possible. An example part number is explained below:- All AP Racing brake discs are individually marked with the following information: TEMPERATURE MEASUREMENT. DISC BEDDING. This section on operating advice has been produced as a guide only, as many formula or racing series may have different requirements. A good source of cooling air should be supplied preferably through the upright the disc throat. A typical venting cross section of 0cm² (1in²) is usually sufficient. The pick up should preferably be in an area of clean high pressure air flow and the ducting should be arranged avoid sharp bends or changes in section which may choke the air flow. Careful design of the Mounting Bell is important in achieving effective disc cooling and avoiding problems. Typically 0% of the airflow should be directed up the disc vents and % up each face of the disc. This ratio can vary considerably in practice but it is important that both disc faces are cooled equally by adjusting the air gaps. Unequal face temperatures can lead disc disrtion and a long pedal. Lightening holes in the bells should be avoided as available cooling air can be lost without cooling the disc. FACE TYPES - P = Plain - D = Drilled Face - G = Straight Grooves G3 = When G appears with a digit, this denotes the number of grooves per face on the disc. e.g. GCCR etc. - CG = Curved Grooves - GD = Grooved & Drilled - CR = Curved Grooved backward facing running out OD. - PG = Partial Groove. - RD = Radius Drilled - SD = Similar RD but with smaller holes. - RA = J Hook Design, grooves run-out. - = J Hook Design, grooves do not run-out. - RC = J Hook as but with 3 hooks across face. - B1 = A B and a Number added the end of the part number i.e.cp351-2db? means the disc has been pre-bedded with a particular pad material. SAFETY AND CARE OF DISCS. Cast iron brake discs should not normally be operated at bulk temperatures in excess of C and above rotational speeds of 3000 revolutions per minute. must be regularly and frequently inspected for excessive heat crazing and cracking. After heavy and prolonged use some surface crazing will often be evident, if this turns in distinct surface cracks which are radiating wards the inside or outside diameter the disc should be changed. with cracks emanating from mounting holes slots, inside diameter, scallops, or outside diameter should be changed immediately. 201 IF IN DOUBT REPLACE. Visit for full & up date product range

12 BRAKE DISCS - - rmation More Cardon & INTRODUCTION. MAINTENANCE. brake discs & pads offer very lightweight construction gether with excellent braking performance. is also expensive but if managed correctly, mainly a question of temperature control, then wear rates and hence running costs can be surprisingly low. AP Racing has more than 20 years of experience with brakes in F1 and Sportscar racing. We recommend and supply a number of Hitco materials which we consider offer the best performance and braking characteristics gether with low wear of any material currently available. This section on discs is designed as a users guide for reference only and we recommend you contact AP Racing technical section for more detailed information before finalising installation details. If the discs and pad surfaces are worn unevenly they can be machined flat and parallel again. A fixture should be made mount the disc on its mounting flange, and both sides should be machined at the same setting. Failure do this may result in thick thin which will cause pedal pulsing and vibration. For H13.5 discs only brown antioxidant paint is available from AP Racing (CP2-15) and should be uched-up as required. NOTE: Do not attempt degrease the material with any solvents. If a disc is contaminated with oil or other please contact AP Racing for advice WEAR PREDICTION. If high brake wear is anticipated in the race, it is important complete as many laps as possible in race trim (using a measured set of carbon) during practice. A race wear prediction can then be made using a similar system that detailed on the AP Racing Life Evaluation sheet which can be obtained from AP Racing or from our website. All laps (including in and out laps) are included and a 1.5 x safety facr applied. COOLING REQUIREMENTS. WEAR GUIDE. The uprights should be designed provide a cooling air pathway of at least 10cm2 area. Hitco requires good face cooling. It is worth moniring airflow temperature on both inside and outside disc faces during testing. It may be found that a larger face-cooling gap is required for the inside face equalize the face temperatures. This is due the tendency of the airflow bypass this outlet when exiting the upright and flowing mainly up the outside face. The resultant temperature differential can lead uneven wear, especially if temperature wear is high. AP Racing carbon discs have disc wear indicrs in the brake face and vary depending on the new thickness. BEDDING DISC AND PADS PRIOR TO RACE. Because AP Racing brake materials have lower operating temperatures compared other carbon brake materials, it is easy achieve running temperatures without the problem of glazing the rubbing faces. Blanking the brake ducts is not required in dry conditions. When bedding the driver should apply hard brake pressure in short applications. Take care not drag the brakes under lighter loads as this may result in glazing. If this occurs and the driver reports there is inadequate retardation, then the pads should be removed from the calipers and both these and the discs should have the rubbing faces de-glazed with coarse emery paper and dust thoroughly removed. MONITORING TEMPERATURES. The most reliable way of moniring the disc temperature is by the application of indicating paints. Use of pit lane thermocouple temperatures is useful for achieving a front rear balance. The green (30oC) and red (oc) paints must only be used. The Orange paint in most kits should not be used as this will damage the disc. If the disc OD is painted with either brown or grey antioxidant paint, this and the grey CVD coating must be completely removed from the section of the disc before the paints are applied. Failure do this could result in the indicating paint not changing colour, regardless of the operating temperature. The temperature paint colour change is not instantaneous, but is accelerated by higher temperature and the time at temperature is cumulative. It is therefore advisable that at least 5 consecutive laps at representative speed are completed before reference the temperature paint. Turning the green paint 75% across disc width is adequate. Turning the red paint just on the disc edges (2-3mm) is acceptable. Running the material at higher temperatures will only result in increased wear rate. If the red paint has changed across the entire disc width, extra cooling must be applied. Continued running at this level of temperature may result in excessively high wear rates, and can lead weakening of the disc structure mm Thick discs which have angles vents have a 1mm diameter indicar 1.00mm deep a.00 diameter indicar 3.50mm deep and there is a triangle wear indicar that is.00mm deep. This indicar shows the direction of rotation of the disc and is the last wear indicar. All these indicars are on both sides of the disc. These are there give the user a guide as the disc wear and when the triangle indicrs are no longer showing the disc is at or below 25mm its minimum thickness. - 30mm Thick discs that use angles vents have a.00mm indicar 2.50m deep and there is a triangle wear indicar that is 0mm deep. This indicar shows the direction of rotation of the disc and is the last wear indicar. All these indicars are on both sides of the disc. These are there give the user a guide as the disc wear and when the triangle indicrs are no longer showing the disc is at or below 25mm its minimum thickness. - 30mm which run non handed vents have a.00mm diameter indicar 2.50mm deep and an.00mm diameter indicar 0mm deep. When the.00mm diameter indicar is no longer visible on both sides this will show the disc at or below its 20mm minimum thickness. NOTE:- In some circumstances one disc face may wear more than the other. If the disc shows signs of this you must make sure you keep a minimum disc thickness of 0mm between the outer disc braking face and the inner cooling vent hole in the centre of the discs. TECHNICAL CONTACTS. AP Racing offer several different materials for different applications and operating conditions. The choice of the best material for given application is complex. Please contact AP Racing Section (racetech@apracing.co.uk) or one of the following engineers directly. Note: See page 50 for Part Numbering. - Nic Olson Key Account Race Engineer, GT ALMS. - Office Tel: + (0) Mobile: + (0) nic.olson@apracing.co.uk - Peter Harris Key Account Race Engineer, GT WTC. - Office Tel:+ (0) Mobile: + (0) peter.harris@apracing.co.uk DISC CONDITION. Experience has shown that if normal operating guidelines are adhered, Hitco discs can safely be used down their minimum thickness. However if for any reason discs are used at very high temperatures it is possible for oxidation occur throughout the material, this will severely weaken the structure. Therefore avoid running the disc with the red paint fully blown. RECONDITIONING. The may exhibit uneven surfaces when worn. AP Racing offer a reconditioning service re-machine disc faces. Visit for full & up date product range 201