Rules for the MX5 Cup Series and SM5 Club Classes Car: 2006
Contents
1. that comes with the sport package shall be used The strut brace mounts may have a hole drilled in them to allow easier access to adjusters for the front shocks 9 6 Cockpit 9 6 1 All interior trim components such as the front passenger seat carpet sun visors seat belts etc not including the dashboard and the attaching hardware and bracketry shall be removed The lower portion of the door panels shall be removed The top portion of the door panels containing the door latch release handle shall remain intact The door window glass and window operating mechanisms shall be removed 9 6 2 All non essential electronic items such as the radio equipment and air bags shall be removed The radio face may be left in place or a replacement trim piece may be used if the radio face is removed If radio face plate is left installed it must be unplugged from the vehicle wiring harness 9 6 3 Any removable equipment such as spare tires tools bins etc shall be removed along with attaching hardware bracketry and covers 9 6 4 MAZDASPEED interior trim kit p n 0000 07 5500 KT shall be used in its entirety The trunk close out panel must be mounted up under the edge of the body to avoid having the trunk close out panel rub on fuel hoses in the trunk 9 7 Body 9 7 1 2006 2008 SM5 cars may be fitted with 2009 2010 bodywork Contact MAZDASPEED 800 435 2508 for required part numbers 9 7 2 Convertible tops and all attaching hardwa2. tube may be added from the front left down tube to the wheel well foot box area to offer additional foot protection in case of an accident 8 1 6 The only allowable tow device for the front and rear of the car is a flexible tow strap The preferable way of attaching the strap is looping it through the eyelet hole and the bumper brace in a choker hitch There shall be an arrow that contrasts strongly with the vehicle paint scheme pointing to each tow eye strap cable 8 2 COCKPIT 8 2 1 An on board fire extinguishing system must be installed per the sanctioning body s rule book 8 2 2 A driver restraint system must be installed the sanctioning body s rule book 8 2 3 Window and Right Side Nets must be installed 8 2 4 A drivers seat must be installed per the sanctioning body s rule book 8 2 5 The two 2 OE external mirrors for the correct vehicle make and model left and right are required and must be mounted in stock location and must be positioned so that the driver can see objects along both sides of the vehicle The OE interior rear view mirror or an aftermarket rear view mirror shall be used 8 2 6 All cars shall have a supplemental support installed for the driver s left leg The support and any padding shall be mounted laterally so that it is flush with the thigh support of the seat The support shall run from the edge of the seat straight forward to just above the driver s ankle The leg support must be mounted rigidly esp
3. Rules for the MX5 Cup Series and SM5 Club Classes Car 2006 2011 Mazda MX5s These are the specifications for MX5 Cup NASA and SCCA 1 The purpose of the SM5 is to provide an opportunity to compete in similarly prepared low cost cars with limited modifications It is an opportunity to build an exact club racing vehicle that can also be raced in the MX 5 Cup series or vise versa This specific set of rules has been written in a manner that allows a higher level of scrutiny resulting in closer competition 2 Unless a particular modification or part is approved in either the sanctioning body s rule book or a Technical Bulletin the vehicle and all of its relevant parts and assemblies shall be stock for the US version of the 2006 2011 Mazda MX 5 Miata with the sport package and suspension kit 3 All SM5 competitors are encouraged to join Mazda s Team Support Program This program enables competitors to purchase stock and competition parts from Mazda at discount prices Call 800 435 2508 send a fax to 949 222 2650 or e mail Mazda at compart mazdausa com to request an application and further details 4 PARTS CLAIMING The following parts may be claimed Engine see Article 5 Transmission Differential Front Dampers Rear Dampers Intake Manifold Throttle Body Exhaust Header Exhaust System Emission Harness Any car classified as a finisher may claim a part from another car Drivers or Entrants must post the claim in writing no later t
4. Y EQUIPMENT 8 6 1 Driver Safety Equipment is required per the sanctioning body s rule book ARTICLE 9 COMPETITION CONFIGURATION 9 1 TRANSPONDERS Vehicles must be equipped with a transponder per the sanctioning body s rule book 9 2 TIRES 9 2 1 Dry tires must be any DOT P225 45ZR17 9 2 2 Wet tires must be any DOT 225 45ZR17 3 8 2 3 9 3 FUEL 9 3 1 The official series fuel is 93 octane or 100 octane and will be available at all events and must be used during all official sessions 9 3 2 The use of any gasoline other than tested track gas is strictly forbidden Additives are not allowed Any violation of this section may result in disqualification loss of all points and money earned at that event and a fine of up to 10 000 00 9 4 Weight 9 4 1 Minimum weight is 2600 Ibs with driver 9 4 2 Ballast is permitted to be used to achieve the minimum weight for a vehicle Ballast may be mounted anywhere in on the car provided that it does not perform a nonapproved function All ballast shall be mounted in such a way that tools are required to remove it Holes may be drilled in the chassis and the chassis may be reinforced in order to safely secure ballast provided that the reinforcement does not perform a nonapproved function Grade 5 bolts or better and load spreading washers shall be used to mount ballast when necessary 9 5 Chassis 9 5 1 The 3 piece front strut tower brace p ns NE57 56 48X NE57 56 48ZA and NE57 56 49X
5. arty from which it was claimed The claimed engine will be resealed and returned to the claimer if the engine is found to be under performing the claimer will be notified and given the choice of rebuilding the engine or having it returned to the claimer unsealed If the engine is found to be compliant the claimant will have a new sealed engine from MAZDASPEED shipped to them The forfeited claiming fee will be used to cover the cost of the new engine sent to the claimant dyno testing of the claimed engine processing shipping and handling 6 TIRE USE 6 1 Dry Tire Use open but limited to DOT 225 45 17 6 2 Rain Tire Use open but limited to DOT 225 45 17 ARTICLE 7 VEHICLE ELIGIBILITY 7 1 Only the 2006 2011 Mazda MX S is eligible to compete in the SM5 7 2 It is intended that the cars competing in the SM5 be very similar in appearance and performance Therefore if an alternate part or modification is specified it shall be used by all cars unless the OEM part is specifically allowed in lieu of the alternate part in the appropriate section 7 3 No other modifications or alterations from the original as delivered vehicle configuration will be permitted except the REQUIRED SAFETY SPECIFICATIONS and AUTHORIZED MODIFICATIONS specifically listed in the SM5 Section of the official rule book for each sanctioning body 7 4 No permitted component modification shall additionally perform a non permitted therefore prohibited functi
6. between the top and sides of the radiator and the core support may be sealed with tape silicon foam etc 15 5 DATA ACQUISITION 15 5 1 Vehicles may be equipped with additional Data Acquisition Systems consisting of a data logger sensors and required wiring 15 6 DRIVETRAIN 15 6 1 Clutch The clutch disc and pressure plate must be bolted directly to an unmodified stock flywheel Allowable clutch components are as follows Part Applicable Part Numbers Clutch Disc Mazda LF04 16 460B MAZDASPEED 0000 02 5415 AC MAZDASPEED 0000 02 5416 AC Pressure Plate Mazda LF04 16 410A MAZDASPEED 0000 02 5405 AC Part Diameter in Min Weight lbs Clutch disc 8 5 1 7 Pressure Plate 9 875 9 4 Flywheel 11 0 16 0 9 375 machined surface 15 7 SUSPENSION AND STEERING 15 7 1 The anti roll bar end links shall be used as provided However the anti roll bar end links may be connected or disconnected as the driver sees fit 15 7 2 Suspension alignments camber caster toe are unrestricted within the limits of the unmodified factory adjustments 15 7 3 There is NO minimum ride height 15 7 4 The rear shock towers supplied with the MAZDASPEED suspension kit may be reinforced through the addition of material to and welding of the shock towers Any reinforcement shall not connect the shock tower to more area of the chassis than the unreinforced shock tower contacts 15 7 5 Hardware items e g nuts bolts may be replaced by similar items per
7. ecially where it meets the seat 8 2 7 A bulkhead panel shall be installed in the trunk to cover the flexible portions of the fuel lines particularly at the point where they may be rubbed by the cockpit trunk close out panel The material may be metal or composite but must be rigid 8 2 8 An aluminum trim panel shall be mounted to the inside of the door bars to prevent the driver s arm from possibly getting caught in between the upper and lower door bars in case of an accident The panel may also close out the top gap between the inner and outer door bars 8 3 BODY 8 3 1 Interior and exterior door handles are required to remain operable 8 3 2 Door locks must be disabled 8 3 3 All three of the brake lights shall be in working order 8 3 4 The headlights and tail lights shall remain in working order The headlights and taillights brake lights may not be taped except with clear tape 8 4 SUSPENSION AND STEERING 8 4 1 Steering lock mechanisms shall be removed 8 5 ELECTRICAL 8 5 1 All cars must use a cut off switch meeting the requirements set forth in the sanctioning body s rule book The cut off switch shall be mounted is the same location on all cars It shall be located on the right side of the horizontal rollbar tube next to the main hoop upright If the driver is unable to reach the cut off switch while in the normal seated position a 2nd cut off switch shall be installed within the driver search 8 6 DRIVER SAFET
8. ed bolts to allow a wire seal to be installed 12 SUSPENSION AND STEERING 12 1 All cars MUST use the MAZDASPEED SM5 coil over kit Kits must be used in their entirety with no parts substituted or omitted The following is a breakdown of components supplied in the kit SMS Kit Part Location Part Number Notes Shocks Front XYZ 123 Bilstein Sealed Shock Rear ABC 789 Springs Front Eibach Rear Eibach Anti Roll Bars KIT 0000 04 5350 EB Rear bar is adjustable ARB end links Front 0000 04 5499 Link is adjustable two needed Rear 0000 04 5498 Helper Spring and Adapter Spring Perch Front and Rear 0000 04 HLPR EB 12 2 Bumpstops may not be modified as supplied in the kit 12 3 Only stock unmodified 2006 2011 front uprights are allowed 13 BRAKES 13 1 Stock Brake Rotor Specification Location Diameter Thickness Notes Front 290mm 11 4 23mm 0 9 Vented Rear 280mm 11 0 11mm 0 4 Solid 14 WHEELS 14 1 All wheels shall be one of the three OE Mazda MX 5 17 x7 wheels Style 1 p n 9965 38 7070 Style 2 p n 9965 36 7070 Style 3 p n 9965 45 7070 ARTICLE 15 AUTHORIZED MODIFICATIONS 15 1 CHASSIS 15 1 2 The driver s side inner door structural panel may be removed to fit the cage but the stock side impact beam and the outside door latch lock operating mechanism shall not be removed or modified 15 1 3 Air jacks are permitted but no air source may be carried on board 15 2 COCKPIT 15 2 1 Any steering wh
9. eel except wood rimmed types may be used Any shift knob may be used 15 2 2 A dead pedal foot rest and heel stop may be added Foot pedals may be modified to improve driver comfort 15 2 3 The heater system and air conditioning equipment located in the engine compartment may be removed but the equipment located in the cockpit shall remain intact 15 3 BODY 15 3 1 Windshield clips are permitted and recommended The MAZDASPEED lexan windshield P N 0000 07 5101 LX may be used in place of the stock windshield The front quarter windows on the doors may be removed 15 3 2 Inner hood insulation liner may be removed 15 3 3 Hood pins are permitted If hood pins are fitted the OE latch may be removed 15 3 4 Auxiliary screen material may be used behind the OE grille piece 15 3 5 Left and right inner fender liners must remain intact Inner fender liners may be riveted in place and a small portion of the liners may be trimmed away where the tire makes contact with the inner fender liners A template will be made available by MAZDASPEED Left and right front fender liners may be removed only if the large excess holes are closed off using 040 060 aluminum and securely fastened into place using rivets 15 3 6 Front and Rear fender lips may be rolled to prevent tire damage 15 3 7 The OE driving lights may be removed The resultant openings may be used to direct air to the front brakes 15 3 8 Side marker lenses may be subs
10. forming the same fastening function s 15 7 6 The aluminum mounting ring on the OE shock tower assembly that mounts to the underside of the chassis may be cut off the OE rear shock tower assembly have the center hole opened up to allow the remote reservoir shock to slide through and be used on the underside of the chassis to sandwich the chassis in conjunction with the MAZDASPEED supplied shock tower 15 7 8 RX8 front hubs may be substituted in place of the O E hubs To complete the conversion the following parts may be purchased from MAZDASPEED Front Hub F151 33 04X ABS Adapter 0000 03 5901 special installation tool 0000 03 5902 Or F189 33 04X may be used An L shaped retainer is allowed for the ABS adapter housing provided it serves no other purpose 15 8 BRAKES 15 8 1 Backing plates and dirt shields may be ventilated or removed 15 8 2 Brake lines may be replaced with steel lines or Teflon lined metal braided hose 15 8 3 Any brake pad that fits the stock unmodified caliper may be used Brake pad friction material is free but must retain stock size and shape 15 8 4 The parking brake may be removed in order to fit the specified interior trim kit into the car 15 8 5 MAZDASPEED brake duct kit p n 0000 03 5301 is permitted The inner fender panels may be modified to fit the brake kit to the driving light openings 15 9 ELECTRICAL 15 9 1 Batteries may be replaced with those of an alternate manufacturer pro
11. han 30 minutes after the end of the race along with cash or a check for the Claiming Fee to be given to the car having their parts claimed The CS will determine when the claimed parts will be removed from the claimants car Claiming fee for a part shall be 110 of the current Racer Net price from MAZDASPEED on the date the part is claimed Claimed parts will be inspected by the Chief of Tech If the parts are found to be in compliance they will be delivered to the team that claimed them Those parts may then be used again in the series 5 ENGINE CLAIMING A claimed engine will be removed by the driver entrant having their engine claimed who will then turn the engine over to the CS The engine will be shipped to and dynoed by Comptech Comptech will evaluate it if the engine is found to be over performing it will be disassembled and thoroughly inspected If any of the engines components have been found to be non compliant the claiming fee will be returned to the claimer Comptech will report to the CHIEF STEWARD the technical infraction The CHIEF STEWARD will take appropriate action with possible fines loss of points or suspension of driver s License The entrant and car owner may be subject to similar disciplinary actions If the engine has been disassembled and found to be non compliant the non compliant part or parts will be retained by the sanctioning body If the engine is found to be compliant the claiming fee will be forfeited to the p
12. hibited Tampering with the supplied ECU may result in disqualification loss of all points and money earned at that event and a fine of up to 10 000 00 All cars provide an auxiliary power source to the ECU that is not disconnected when the Master Electrical Cut off Switch is turned off This is to keep all recorded data stored within the ECU Owners having questions about hooking up auxiliary power to the ECU should contact MAZDASPEED If the recorded data is not available when requested by the sanctioning body penalties may be issued ECUs will generally be flashed with the correct calibration owners may obtain the most current calibration from a Mazda service department or from the sanctioning body s staff 10 2 Instrument clusters shall be unmodified OE parts 11 DRIVETRAIN 11 1 The stock 2006 2011 6 speed gearbox internal parts and ratios shall be used by all cars MAZDASPEED 3 4 shift fork P N 0000 02 5701 is allowed Gear Ratios Ist 3 82 2nd 2 26 3rd 1 64 4th 1 18 5th 1 00 6th 0 83 11 2 The OE open differential or OE limited slip differential may be used Final Drive Ratio 4 10 1 11 3 No treating polishing or coating transmission differential or axle components is permitted 11 4 Owners shall pre drill the bottom left bolt at the rear of the gearbox and the rear of the differential housing with a 1 16 1 8 size drill bit Owners shall also pre drill the central external fin next to each of the drill
13. on Replacement parts required to meet stock OEM specifications may be purchased from alternate standard outlets such as parts stores provided they are the exact equivalent of the stock OEM part ARTICLE 8 SAFETY Vehicles must pass a technical inspection as specified in the sanctioning body s rule book 8 1 CHASSIS 8 1 1 The roll cage shall be installed per the sanctioning body s rules and shall adhere to all regulations 8 1 2 The roll cage shall be welded together The outer edges of the dashboard outside of the dash vents may be trimmed the minimum amount required to install the A pillar down tubes 8 1 3 If the horizontal bar within the main hoop does not allow the shoulder belts to achieve the proper angle as listed in Appendix G one of the following actions shall be taken The left half tube of the main hoop horizontal bar may be relocated vertically to achieve the proper shoulder belt mounting angle or an additional half width straight horizontal bar may be added behind the driver s seat to achieve the proper shoulder belt mounting angle Cars prepared for tall drivers needing additional leg room may replace the left half straight horizontal bar with a bent bar to allow the seat to be moved further rearward 8 1 4 The height of the knee bar may be adjusted up to offer additional leg clearance if desired The bottom of the dashboard may be modified the minimum amount required to allow for additional vertical movement 8 1 5 A
14. re may be used for club competition so long as they are positively fastened using the stock mounting locations The rubber weather strip and trim pieces that mate the convertible top and quarter windows to the windshield may be removed 9 8 AERODYNAMICS 9 8 1 MAZDASPEED trunk lip spoiler p n NF51 V4 920G xx shall be used 9 9 ENGINE 9 9 1 Only Comptech sealed engines will be eligible Engines must be ordered through MAZDASPEED Competitor rebuilt engines are prohibited Sealed engines may be returned to Comptech for service and resealing Engines returned to Comptech unsealed will be refused 9 9 2 Crankshaft Position Sensor and Crankshaft pulley relationship MUST be as specified in the 2006 2011 MX 5 Factory service manual CRANKSHAFT POSITION CKP SENSOR INSPECTION LF Pg 01 40 34 9 9 3 MAZDASPEED cold air intake system p n 0000 06 5203 KT is required 9 9 4 MAZDASPEED exhaust system p n 0000 06 5450 KT is required 9 9 5 An fuel test port must be installed between the rigid fuel supply line and the fuel rail per the sanctioning body s rule book 9 9 6 Vehicles must produce of a reading of 94 dBA or less on a Sound Test See the sanctioning body s rule book for Sound Test procedures 10 ENGINE CONTROL UNIT ECU 10 1 The stock unmodified ECU shall be used The CS at his discretion may require selected cars to utilize a provided ECU Tampering either electrically or mechanically with a provided ECU is strictly pro
15. tituted with a more durable material as long as they retain their original shape and color 15 4 ENGINE 15 4 1 A turn at the end of the exhaust pipe may be used to help disperse direct noise in order to meet specified decibel limit in all conditions 15 4 2 OEM exhaust system heat shields may be removed Exhaust headers and exhaust systems may be wrapped coated or both 15 4 3 The oxygen sensor may be reinstalled in the competition exhaust system The sensor shall be placed in the exhaust system within reach of the OE electrical connection for the oxygen sensor The bung needed to reinstall the oxygen sensor may be purchased from MAZDASPEED 15 4 4 A engine to fender brace may be used if mounted in such a way that it does not foul brake lines fuel lines or other systems that would interfere with the safe operation of the vehicle under race conditions 15 4 5 Spark plugs are unrestricted 15 4 6 Cooling System 15 4 6 1 The alternate radiator p n 0000 01 5550 from MAZDASPEED is permitted 15 4 6 2 Thermostats may be modified removed or replaced 15 4 6 3 Bleeder screw may be added to heater hose tube 15 4 6 4 MAZDASPEED oil cooler p n 0000 01 5100 KT may be installed 15 4 6 5 Permitted Cooling Fluids Glycol based coolants are not permitted Additionally any other coolants that significantly reduce the friction properties of the racing surface beyond what plain water does are not permitted 15 4 6 6 The gap
16. vided they are of similar amp hour capacity size and weight and are fitted in the standard location Additional battery hold down devices may be used and are recommended The positive battery terminal shall be insulated to prevent sparking 15 9 2 With the exception of the wiring needed to install the safety equipment to operate any data system to preserve power to the PCM or to repair accident damage there shall be no additional non OE wiring connections etc to any wiring harness or component of the car 15 10 WHEELS 15 10 1 Aftermarket wheel studs and lug nuts are permitted Wheel spacers are not permitted 15 11 FUEL TANK 15 11 1 Unleaded fuel filler trap door and restrictor plate in filler neck may be removed Authors Jim Daniels amp Mike Collins Revised 7 12 2010 JD
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