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"Boxster Spec Racing” BSR Class Rules for 2009

(Rev 6)

Class Purpose
The purpose of this Spec Class is to provide a competitive racing class where the cars are reliable and performance potential is as even as possible. These rules are intended to control costs and remove any performance advantage from the cars so that driving ability and suspension set up are the greatest factors in determining race winners. This class will be referred to as the BSR class.

General Rules
All parts must be factory stock from one of the eligible years, except where otherwise noted. In general, modifications which improve aesthetics, access to systems, safety or reliability are allowed and encouraged provided they offer no performance advantage. There are no exceptions. No upgrade to any Boxster S component is allowed unless specified in these rules.

Any modification not expressly covered by these rules is prohibited.
NO MODIFICATION OF SPEC PARTS PERMITTED
NON-STOCK PARTS CAN HAVE NO POTENTIAL FOR AERODYNAMIC IMPACT

Eligible Models
1997-1999 Porsche 986 Boxster. 2.5 motor part #M96.20

Sanctioning Body Classing
The following sanctioningbodies have adopted these rules as stated and assigned the following classes:

Safety
All safety requirements are subject to the rules of the event sanctioning body.

Electrical cutoff switches are required.

A 5-point or 6-point harness is required for all seats installed in the car. 3” lap belts and 3” shoulder harnesses or a HANS specific 3-2-3 belt, and a minimum single 2” anti-submarine strap. Harnesses must be attached either to the chassis using large backing washers, or to the roll cage, but not directly to the seats or seat rails.

A window net or arm restraints are required.

A front tow hook or strap is required. Rear tow hooks or straps are highly recommended.

Front hood pins required.

Roll Cages
Roll cages are required and may be of weld-in or bolt-in type. Cages may have a maximum of six connection points to the chassis and may be welded to the A-Pillar. Roll cages may not pass through any walls or sills but may pass through front bulkhead to be tied to shock tower. Roll cages must be constructed of either mild or alloy steel. Roll cage must contain a transverse (left to right) brace. The main hoop must be full cockpit width. Bolt-in Roll cages must use a backing plate with a minimum thickness of 3/16”. Bolts must be grade 5 or better. Scab plates for welded cages may not exceed a total combined area of 80 sq. inches. Scab plate material must be 3/16” thickness cold rolled steel. Any portion of the cage that could come into contact with the driver’s helmet must be covered with high-density foam with a minimum thickness of .75”.

Minimum Roll Bar Tubing Sizes: Mild Steel: 1.75” X .095 or 1.5 X .120 wall Alloy Steel 1.50” X .095” wall

Approved Bolt-in Roll cages: Safety Devices Part # SD-P986 AutoPower Part# TBD

Welded-in roll cages are recommended.

Weight
Minimum weight requirements must be met immediately following all qualifying sessions and races. The choice of which systems/accessories to remove, in order to lighten the chassis, is free. Batteries may be swapped for a lighter type, but must be securely mounted in the stock location. No drilling or sawing of metal body panels unless specifically allowed. Minimum weight includes driver. Spare tires may be removed. Ballast to meet minimum weight must not exceed 75lbs, distributed as follows (please note, bolting down 25lbs of ballast to the passenger floor with another 25lbs of securing force will not be considered to "spec");

Max 25lbs, bolted to the floor of the passenger footwell OR retain passenger seat.
Max 50lbs, bolted to the floor, directly behind the Driver's seat.

Minimum weight = 2650 Lbs. Including driver

Engine
General
All engines and their mechanical and electrical components must remain stock. No solid engine or transmission mounts are allowed. Semi solid mounts are allowed. Engine and Transmission must remain in their stock location.

Cooling System
Ethylene glycol-based anti-freeze is prohibited. Distilled water is recommended as a replacement. Use of additives, such as Redline Water Wetter is permitted. Radiator fans may be direct wired with a switch.

Radiator
One additional radiator, placed in the center of the grill area is allowed. Boxster S or 996 center radiator is allowed as an addition only to the stock radiators.

Oil Cooling
The factory oil cooling system must remain stock, except for the following allowed modifications:


Air Filter
No modifications to the factory engine air inlet or intake system. Drop in factory size/style replacement air filters only.

Fuel Tank and Filler
Must remain in the stock location.

Pulley/Belt System
Under drive crank pulley allowed, minimum 4" diameter. No modification allowed to: water pump, power sterring pump alternator, idler pulleys etc and all must be operable and belt driven.

Computer Engine Management System
The stock computer engine management system must remain stock. No other engine management system may be added. No aftermarket chips are allowed. No re-mapping or flashing of factory chips is allowed.

Exhaust System
Exhaust manifolds must remain stock. All other components are free.

Catalytic converters may be removed.

Transmission / Differential
Transmission
v. G86/00
Must remain stock with unmodified components (no coatings or non-stock parts). May be rebuilt but must retain stock gear ratios.

Ratios: Clutch
Any approved clutch disc and clutch cover (pressure plate) may be used. Approved lightened flywheels are allowed.

Approved clutch kits: Approved lightened flywheels: Differential
Must remain stock.

Shifters
Short-shift kits are allowed but not recommended.

Suspension/Steering Components
All suspension components not otherwise listed must be stock factory parts. All suspension components must be mounted in the unmodified factory original mounting locations. No urethane bushings are allowed.

Shock Tower Braces
No modification of the shock tower is allowed.

Strut braces are not allowed.

Camber plates in conjunction with Adjustable A-Arms are not allowed.

(Cars with camber plates/ mono-balls may apply for grandfathered status for the 2009 season with proof of purchase prior to December 2008.)

A-Arms
Approved adjustable A-arms are allowed for the purpose of increasing negative camber in the front and rear wheels. The approved adjustable A-Arms are Porsche Factory Parts only for the GT3 “Street”.

Springs and Shocks
Shocks: Bilstein PSS9 or PSS 10. Stock valving only. No in-cockpit adjustability.

Springs may be changed only to: All spring and shock systems must mount in the factory original location only.

Sway Bars
Approved sway bars: No modification to mounting points.

Drop Links Approved drop links: (modified stock allows for a shortening of 2" for use with GT3 front sway bars)

Must mount to stock shock location

Toe Links
  • Rear: Stock
(Cars with the Tarett Engineering # 996TLNKR toe links are grandfathered legal for the 2009 season with proof of purchase prior to February 2009. Ask your regional rep for more info if needed.)

Ride Height
  • Front: Minimum 90mm as measured at front cross of aluminum cross member (all parts and bolt heads)
  • Rear: Minimum 90mm as measured at front-to-rear braces, near sway bar (all parts and bolt heads)
 Wheels and Tires
Wheels
Any factory cast aluminum rim intended for use on the Boxster matching the original offset is allowed.

Wheel weight must be equal to or greater than stock. Steel bolts or lugnuts are required. No spacers are allowed unless running the alternate 255/40/17 "square" configuration that is noted in "Tires". Spacers of 1mm to 8mm may be needed when using 8.5" rims all around. Hubs may be converted to studs in place of wheel bolts.

Tires
Toyo R888 *Tire size waiver for PCA Club Racing*

This section pertains to the testing of an alternatetire size for data collection purposes of the Boxster Spec RulesCommittee. Participation in thetire testing and data collection is purely voluntary for our drivers. Based on the tire testing data in 2009,a determination will be made for the 2010 season whether to adopt thealternative tires/wheel sizes or to keep the current staggered setup. Participation in the tire test does notguarantee that the square configuration will be in effect for 2010.

With the above statement in mind, PCA Club Racingofficials have approved the 255/40/17 tires sizes using the stock rear orequivalent 17x8.5 inch – 20 lbs minimum – 48-50mm offset wheels on all 4corners of the car as a recognized alternative tire and wheel configuration forthe 2009 season..

Several drivers have tested the 255 “square” setup and report back that thetires are (1) less expensive per tire to purchase and (2) wear significantlybetter as you can rotate the tires front to back. Our early testing indicateswe will get an additionl 1 to 3 track days out of a set of tires, which issignificant savings on tire consumption.

What this means for PCA Club Racing is that if all participants in the racedecide to drive on the 255 “square” alternative, the cars will be deemedconforming to rules. Conversely, if a driver or group of drivers decide to raceon the current default 225/255 setup, this default setup will take precedenceand be the conforming specification for all cars at the event.

If anyone has any questions please contact your regional rules committeerepresentative or me directly. Our regional representatives will work with PCAofficials and race participants to administer this rules allowance. With thisrules allowance from PCA, we can gather significant race condition dataconcerning tire wear from several drivers with regards to the “square” concept.

 Brake System
Brake pads are free.
Steel braided brake lines are allowed.
Brake dust guards may be removed.
The emergency brake, lever and/or cables and all associated parts may be removed.
Brake cooling systems are allowed, provided they use only air to cool with. Air may be vented through the front air dam for brake cooling.
Stock replacement rotor, steel construction. One piece design. Drilled or slotted allowed.
Brake calipers must remain completely stock and sit in factory location.

Battery
Stock location, min 10lbs.

Data Acquisition and In-car Timing Equipment
Allowed.

Appearance
The class nomenclature of BSR shall appear on each side and the rear of the car in 4” contrasting letters. Car numbers shall be issued by the sanctioning club hosting the event. Numbers shall comply with the rules of the sanctioning body.
Soft convertible tops and all associated motors and assemblies may be removed.
Air dams and bumpers must be either stock or approved replica units. No Carbon fiber is allowed.

Approved front bumpers: Deck lids must remain stock.

Splitter
GT3 style factory part # 996-505-986-91 or clone only. Splitters may not extend forward of the front bumper, nor lower than 3” from the bottom of the front bumper. The front bumper must be located in the factory position and cannot be moved in any way.

Body
Factory or factory replacement side skirts allowed. Porsche part #__________

Hard tops are mandatory and may be either factory or aftermarket fiberglass replicas of the factory roof. No carbon fiber. Rear Window must be stock in appearance with no venting (can be lexan material).

Other
License plates, license plate frames, license plate lights, and insignias and emblems may be removed.

Hood pins are allowed and recommended. Stock hood latches may be disabled or removed.

All headlights and taillights must remain stock. Headlights may be covered.

Rear spoiler must be left in the upright position. Rear spoiler lift motor may be removed.

Rear bumper license plate area may be cut out to 27" wide by 7" tall max. Tow hook hole max 6" x 3". No other modifications permitted.

Any exterior modification that is determined to have no performance enhancing value is allowed. This includes but is not limited to radiator inlet screens, side inlet scoops and screens, ventilation ducts to brakes or to the passenger compartment.

Interior
The driver or passenger seats must be replaced with any seat suitable for competition, including a racing-type bucket seat. Factory seat tracks may be modified, reinforced or removed to facilitate replacement mountings provided they perform no other function.

Factory dashboard instrument pod must remain intact. Additional gauges may be added. 996 instrument cluster may be used. Factory navigation systems and all airbags may be removed. Non-visible bottom edge may be removed to allow easier under-dash access.

Any steering wheel may be used except wood rimmed type steering wheels. Quick release steering hubs are allowed. Steering wheel lock must be removed.

The air conditioning/heating system may be removed.

Factory engine cover must remain in the stock and latched position.

All interior items may be removed except where otherwise noted. The driver’s side floor mat must be removed. Both doors may be “gutted.” Factory door beams must remain intact or NASCAR style side intrusion door bars must be added.

All insulating material may be removed from the interior.


Rules Revision Process
The Boxster Spec RacingRulebook will be controlled by PCA and POC with hopes of ongoing cooperationthat will result in a continued unified Spec. The two sanctioning bodies willreceive input from the BSR Rules Committee through the Sanctioning BodyLiaison.

The BSR Rules Committee willconsist representative of every region wherein there are a significant numberof Boxster Spec cars. Minimum Rules Committee configuration: 2 builders, 3drivers.

The Rules Committee will collect and assess ruleschange suggestions from the active drivers on an annual basis per the followingguidelines:

April 1- May 31
Proposals for new rules or modifications toexisiting rules will be posted to a Rules Revisions forum on the Boxster SpecRacing website (boxsterspecracing.org). Accessto this forum will require a special permission that will be granted only toBoxster Spec drivers and builders who have been active in the series within theprior twelve months.

June
Rules proposals and discussions will be reviewed and decided by the RulesCommittee.

July 1
Rules change suggestions for the following seasonwill be forwarded to the PCA/POC by the BSR Sanctioning Body Liaison. Thesanctioning bodies’ decisions will be announced and posted to all availableBoxster Spec websites. At any time during thecompetitive season, should there be a need for immediate rules change (specpart not available, over-looked loophole being exploited etc) the BSR Rules Committee shall meet, make a decision on that issue and notifythe Sanctioning Body Liaison of the needed rule amendment. Best efforts via email and website posts will be made to inform all drivers of any changes.