2012 Miata Challenge Rules & Regulations

download here  2012MiataChallengeRules_123011

It is the competitor’s responsibility to read and understand these rules in their entirety. While points for modifications for competitor classing will not change during the year, we may add clarifications on any of the rules and/or regulations at any time during the year .

Rules Updated 01/05/2011  10:50apm PST

Competitor Registration

• Competitors will be required to have a completed entry form in the hands of the timing person before competition begins. It is the responsibility of the entrant to make sure this happens. Verbal requests to enter competition will not be counted.

AMB Transponder Registration

• Only officially registered AMB transponders recorded by Speed Ventures will be scored. You may rent one from SV or register your own on your entry form.
• Officially registered AMB transponders must recognized by the timing booth starting from the 2nd session for purposes of qualifying grid positions for the timed sessions
• One transponder per driver while on track. Any competitor on track during a timed session with two active transponders on the car will have all times for both transponders disqualified for the entire day without notice.

Vehicle Registration

• Competitors will be required to submit one vehicle for the day’s competition no later than 8:30 am that day. A tech sticker will be given to the entrant to be placed on the upper left hand (drivers) corner of the windshield.
• Competitors will not be allowed to switch cars once timed runs have begun.
• Any modifications not specifically allowed in this document can be considered not allowed.
• Competitors entering the wrong class for their modifications will be disqualified.
• Competitors found modifying their cars during timed sessions to a class above that which they are registered for will be disqualified and their points from the previous event deleted. They will also be banned from participating in the two subsequent MC events.

Series Championship Points System

• All points scored will count towards the series championship.
• 2011 California Series ONLY: Two (2) of a competitor’s lowest-scoring rounds in a season will be dropped.  Therefore, his official season points total will consist of his nine (9) highest-scoring rounds.
• To be declared a class champion, the competitor must have won at least one road course event when there was a minimum of one other entrant in that class. In the event that the high points scorer did not win an event this way, the next highest point scorer will be declared champion.
• In the event of a season final tie in points, the competitor with the most road course wins will be declared the higher points scorer.
• In the event of a season final tie in points and road course wins, the competitor with the highest average points per event (AX and RC) will be declared the higher points scorer.
• In the event we still have a tie, the faster of the two that day wins.

Road Course (RC)

• 1st – 10 points
• 2nd – 8
• 3rd – 6
• 4th – 5
• 5th – 4
• 6th – 3
• 7th – 2
• 8th – 1
• DNF – 1 (if 1-7 competitors only, otherwise 0 points)
• DSQ – 0

Autocross (AX)

• 1st – 5 points
• 2nd – 4
• 3rd – 3
• 4th – 2
• 5th – 1
• DNF – 1 (if 1-4 competitors only, otherwise 0 points)
• DSQ – 0

Classification

• Street: 9 points or less           >2200 lbs
• Modified: 9.25 – 12.00 points  >2100 lbs
• Super Modified: 12.25 -17.5   >2000 lbs
• Unlimited: 17.75+ points

Minimum weights are measured with driver as raced. If your car is under the minimum weight for your class, you will be moved to the appropriate class regardless of modification points. A stock Miata is 2200 -2400 lbs without the driver or fuel so unless you have made major weight reductions, you are probably OK. If you do get your car weighed, simply keep the receipt and present it to SV if asked to do so. Link to public scales

Tires

• 201 or higher treadwear: +0
• 200 or less treadwear: +2
• 140 or less treadwear: +4
• 100 or less treadwear: +6 (100 or less treadwear “race compounds” not allowed in Street class)
• 40 or less treadwear (also non DOT slicks): +8

Wheels

• Wheel width <7.5″: +0
• Wheel width 7.5-8”: +1
• Wheel width >=8.5″: +2
• Steel wheels: -1

Suspension

• Any change to OEM front and/or rear sway bar (Update/ Backdate free): +0.5
• Any non OEM springs (not including threaded sleeves or adjustable spring perches): +0.5
• Any eccentric/offset front suspension pivot bushing (Street only): +0.5
• Any coilover, includes sway bar, bushing and spring points: +2
• Any aluminum brake caliper: +0.25

Power

• Non USDM OEM header and/or test pipe: +0.5
• Any internal engine mods (Cam, pistons, porting, etc) including 1-6~1.8, early 1.8 to later 1.8 swap: +1.5
• Any external engine mods (intake, ECU, pulley): +0.5
• Iron block: V8, V6, non Miata I4 swap (includes internal, external,  header, exhaust, subframe mods): +3
• Aluminum block swap: V8, V6, Rotary, I4 (includes internal, external, header, exhaust, subframe mods): +5
• Forced induction (Miata engine) (includes ECU, header, exhaust, internal, external mods): +5

Drivetrain

• Quaife or OS Giken dog box conversions: +1
• Any Torsen (including OE) or clutch type differential: +1

Body / Aerodynamics:

• Any Aftermarket front lip spoiler: +0.5
• Any front aerodynamic modification, including canard, splitter or bumper swap (includes lip spoiler). OEM replica bumper of non-OEM material: +1
• Any aftermarket rear trunk lid mounted spoiler: +0.5
• Modify OEM rear bumper skin: +0.25
• Any rear aerodynamic modification, including wing, diffuser (includes spoiler points): +1
• Any non-OEM lightweight body panels (including hard top under 20 lbs including window): +0.25 per panel
• Mid-body flat bottom under tray: +0.25

Safety

• One piece metal or composite driver seat and current SFI or FIA approved 5 or 6 pt harness and charged fire extinguisher installed: -0.5

Lightening

• Removal of headlight assembly: +0.25
• Removal of front and/or rear bumper supports: +0.25
• Any tubular control arm: +0.25
• Removal of door windows (see below): +.25
• Gutted doors if NASCAR door bars are not installed (includes door window points): +0.25
• 0.187” or 0.250” Lexan, Tuffak or Makrolon polycarbonate windshield: +.5

Model

• NB 99-05 (Street class only): +1
• NC 06-13: +2.0

Other

• Excessive Rice: +1
• Non male: -1
• Automatic Trans (Miata engine only): -1

Definitions

Safety Equipment

• Recommended but not mandatory: Properly installed SFI or FIA 5/6 pt harnesses, FIA or SFI seat,  SFI approved head & neck restraint.
•  No lightening points will be assessed for SFI or FIA 8855-1999 approved racing seats.
•  4/5/6 pt harnesses may not be used in conjunction with OEM seats.
•  4 pt harnesses must be ASM type. Unrated Takata or “JDM” type 4 points not allowed.
• 90-05 Miatas must have a four point roll bar bolted or welded to the frame per Speedventures minimum safety requirements for open cars. Two point “style” bars not be allowed. 6-8 pt cage is free.

Mirrors

• Street, Mod, Super Mod: Free, but must not serve any other function.
• Unlimited: Free

Interior

• Street: Must retain complete OEM dash, a real passenger seat, OEM or OEM equivalent door cards and carpet. Carpet may be removed behind driver seat. No removal of any single component over 1 lb unless otherwise allowed for Street class.
• Modified: May remove passenger seat, carpet, dash, heater.
• Super Mod, Unlimited: Free

Items which may be removed in Street class

• Door arm rests
• Center console aft of shifter
• Brake dust shields
• ABS system
• Air conditioning system
• Power steering system
• Soft top
• Hard top
• Airbag in steering wheel
• Cruise control
• Radio
• Speakers
• Passenger side airbag may be removed in Modified & Unlimited only

Windshield

• Street & Modified: Must be OEM or OEM replacement and be made of DOT approved shatter resistant glass.
• Unlimited: Free

Battery – Charging system

• Street: Any battery in stock  mounting location. Alternator must be OEM or direct OEM replacement in stock location.
• Modified: Any battery(s) in any mounting location. Alternator may be replaced with aftermarket but must retain OEM mounting points and location.
• Super Mod, Unlimited: Battery, charging and starting system are free.

Master Cut Off Switch

• All classes: Free. May serve no other purpose

Suspension & Drivetrain

Tires

• Street: May not use tires with UTQG tread wear rating of less than 140.

Clutch – Flywheel

• Street: Must be OEM style stamped steel cover of at least 200mm diameter friction surface. May use OEM diameter friction surface lightweight flyweel
• Mod, Super Mod, Unlimited: Free

Wheel Spacers

• All classes: Free, but these limitations:
• 3mm maximum on OEM studs
• 20mm maximum on extended studs

Transmission

• Street: May use Miata 5 or 6 speed transmission. Quaife, OS Giken close ratio or dog box conversions not allowed.
• Mod, Super Mod;  Miata engine: May use any syncromesh gears or ratios but only in Miata transmission
• Mod, Super Mod; non-Miata engine: May use any syncromesh gears or ratios
• Unlimited: Free

Final Drive Ratio

• Street: May use any USDM Miata ratio (3.9, 4.1, 4.3).
• Modified: May also use 3.6 and 4.875.
• Unlimited: Free

Brakes

• All classes: Any master cylinders and proportioning valves are free. Any Miata OEM or steel caliper, any rotor, soft lines, pads are free.
• Street: Must retain functioning OEM parking brake mechanism.
• Mod, Super Mod, Unlimited: May delete emergency brake mechanism for non-street legal cars only.

Cooling Ducts

• Street, Mod, Super Mod: May add no more than two 3” diameter holes in front bumper for cooling ducts without bumper mod points. Further modifications constitute Front Aerodynamic Modification.
• Unlimited: Free

Engine & Differential Mounts

• All classes: Free

Connecting Links for Sway Bars

• All classes: Free

Suspension Bushings

• Street: May replace with OEM replacement urethane or hard rubber type. No solid materials, e.g.: Delrin, Aluminum, Acetal.
• Modified: Same as Street, but may use offset bushing or rigid materials without penalty

Control Arms

• Street & Modified: Must use Mazda Miata factory control arms. May update / backdate. May add material but not remove material.
• Unlimited: Free. May replace pivots with spherical bearings. May relocate pivot location up to 25mm from OEM location for that year chassis

Dampers (Shocks)

• “Coilover” herein defined as a damper assembly having either a threaded body, threaded sleeve or springs of less than 75mm ID.

Upper Shock Mounts

• All classes: Free

Bump Stops

• Street & Modified: May not use aftermarket or modified OEM spindles. Update / Backdate OK.
• Super Mod & Unlimited: Free

Alignment

• All classes: Free

Engine

Exhaust

• All classes: Free, behind OEM cat location.

Catalytic Converter

• Street: Must have functioning catalytic converter. Function will be verified with infrared laser thermometer.
• Mod, Super Mod, Unlimited: May delete catalytic converter.

Ignition

• All classes: Free

Radiator

• All classes (type): Free.
• Street (location): Must be mounted within 2” of OEM location in same orientation. Type, free.
• Mod, Super Mod: Must be located within 2” of either bottom two or top two OEM mounting points. Type, free.
• Unlimited: Location and type free

Coolant Reroute

• All classes: Free

Oil Cooler

• All classes (type): Free.
• Street and Modified (location): Must be located in engine bay and serve no other function.
• Unlimited (location): Free

Fuel

• All classes: Up to 100 octane unleaded pump gas, or E01~E100 allowed. Water or methanol injection is allowed; however, Methanol can not be primary fuel source. Nitrous Oxide injection can not be used. Any competitor found using N2O will be banned forever.

Engine Swaps & Forced Induction

• All classes: Non Miata engine conversions include points for, internal, external, header, exhaust, subframe. Forced induction Miata engine includes points for ECU, header, exhaust, internal, external mods.

Body & Chassis Modifications

Body Panel Attachment

• Street: May pin hood and trunk. Must retain OEM hood and trunk hinges. May delete front hood latch if two pins are used. Must attach within 0.25” of OEM locations
• Modified: May pin hood and trunk. May remove all hood or trunk hinges and latches if 4 pins are used per panel. Must attach within 0.25” of OEM locations
• Unlimited: Body panel attachment free.

Tire to Fender Clearance

• All classes: Fenders may be rolled and or pulled to allow for tire clearance.

Flares

• Street & Modified: Must take lightweight body panel points if material is removed from OEM fender to allow flares. See “Body / Aerodynamics” section in Classification portion of the Rules.
• Unlimited: Free

Hood Vents

• Street & Modified: May not protrude more than 1.25” above surface of OEM hood.
• Unlimited: Free

Chassis Stiffening Braces

• Street & Modified: Chassis braces can serve no other purpose.
• Unlimited: Free

Tow Hooks

• All classes: OEM tow hooks may be removed. Must retain at least one front and at least one rear fixed or strap style tow hook at all times while on course.

Tub (Unibody)

• Street & Modified: Can not modify tub except, and only to allow installation of approved roll bar, seat, intercooler or engine swap.
• Windshield frame removal allowed in Super Mod & Unlimited only: 3pts
• Unlimited: Must retain contiguous tub between OEM subframe mounting points. Examples: Radiator support may be removed or replaced. Cage may extend to shock front shock towers. Windshield frame may be removed.

Subframes

• Street: Must use unmodified OEM subframe unless part of non-Miata engine swap. May update/ backdate.
• Modified & Unlimited: Free

Tail Lights

• All classes: All cars must retain functioning tail lights of same light output and color.
• Street & Modified: Must retain OEM or direct OEM replacement taillights in original locations. Third high mount light may be removed.
• Unlimited – Type and shape of tail light free and must be located within perimeter of OEM tail light.

Aerodynamics

• “Front” of the car is herein defined as the top of the windshield header forward.
• “Rear” of the car is herein defined as the top of the windshield header aft.
• Front or rear lip spoiler herein defined as “Homologated” i.e. that which is/was serial produced, is/was readily available to the public.
• Rear lip spoiler may not protrude more than 7” above lower most point of OEM trunk lid. Taller than that and it will be considered a wing.
• “Custom” is herein defined as not Homologated i.e. not for sale, not advertised, not readily available to the public, DIY, one of a kind or home made.

Under tray

• Front: Lowermost point of front bumper skin to front subframe cross member – All Classes: Free.
• Middle: “Mid-body Flat Bottom Under Tray” herein defined as any structure covering more than 300 square inches combined of underbody between engine/transmission junction and rear axle centerline Side skirts attached below door opening, between wheel openings – All Classes: Free.
• Rear: Any under body structure or structure (other than engine exhaust) covering more than 300 square inches combined of area aft of rear axle centerline herein defined as a diffuser.

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