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CAR and DRIVER Race Series '05-'06 Rulebook

1. Format

1.1 Event Description
The AutoX Challenge is a driving skill contest conducted on courses that emphasize car handling and agility rather than speed or power. The course consists of straight sections and connecting turns or corners, as marked by pylons, generally resembling a miniature road course. If a driver displaces a pylon during a run a one second time penalty will be assessed (cumulative for each pylon displaced). Failure to complete the course in the correct order will result in a score of "Did Not Finish" (DNF). Each driver will get three attempts on the AutoX Challenge with their best time counting toward the overall score. The AutoX Challenge will make up 50% of the event raw score.

In the Skidpad Challenge drivers push their vehicle to its maximum cornering ability. The Skidpad Challenge is circular and is marked with cones. If a driver displaces a pylon during a run a one second time penalty will be assessed. The Skidpad Challenge will make up 25% of the event raw score.

The Acceleration Challenge determines a vehicle's maximum acceleration ability as well as a driver's reaction time and shifting speed. From a standing start, drivers will accelerate to the finish line and must stop within the designated safety area. If a driver exceeds the safety area the time will be disallowed. The Acceleration Challenge will make up 25% of the event raw score.


2. Scoring
In each of the three elements, the fastest time for each class will receive a perfect score. A perfect score on the AutoX Challenge will be valued at 50 points, while the Skidpad Challenge and Acceleration Challenge will each carry point values of 25. Drivers finishing in second place and below will receive a points value based upon the percentage of the winning time they ran. A driver's score for any given challenge is determined by dividing his or her time (including penalties) by the top time in the class and then multiplying the points value for the element by the quotient. The table below demonstrates this scoring method during a sample event.

Acceleration Challenge
DriverRaw Time% of LeaderRaw Score
Driver One 7.101 100 25
Driver Two 7.652 92.79 23.19
Driver Three 8.007 88.68 22.17
Driver Four 8.008 88.67 22.16

Skidpad Challenge
DriverRaw Time% of LeaderRaw Score
Driver Two 16.992 100 25
Driver Four 16.996 99.97 24.99
Driver Three 17.192 98.83 24.70
Driver One 18.371 92.49 23.12

AutoX Challenge
DriverRaw Time% of LeaderRaw Score
Driver One 51.654 100 50
Driver Four 52.382 98.61 49.30
Driver Two 52.741 97.93 48.96
Driver Three 53.391 96.74 48.37

Overall Element Scores
DriverEvent Raw Score
Driver One 98.12
Driver Two 97.15
Driver Four 96.45
Driver Three 95.24

Final event scoring will factor in how many drivers in your class you defeated. Drivers will receive a bonus point for each driver finishing behind them. For example, in a 10 car class the winner would receive 9 bonus points while the ninth place finisher would receive 1.

Final Scores
DriverTotal Event Score
Driver One 101.12
Driver Two 99.15
Driver Four 97.15
Driver Three 95.24

2.1 AutoX Challenge
2.1.1 A driver's top time, including penalties, will be used to determine their AutoX Challenge score.
2.1.2 Each displaced cone will carry a one second penalty.
2.1.3 If the driver fails to complete all elements of a course a "Did Not Finish" (DNF) penalty of ten seconds will be assessed.
2.1.4 If a driver fails to complete the course by significantly "short cutting" a section a "No Time" will be assessed.
2.1.5 A driver exiting the course and re-entering in the same location will not be scored with a DNF.

2.2 Skidpad Challenge
2.2.1 A driver's top single lap time, including penalties, will be used to determine the skid pad score.
2.2.2 Each displaced cone will carry a one second penalty.

2.3 Acceleration Challenge
2.3.1 A driver's top pass time, including penalties, will be used to determine the drag race score.
2.3.2 A "Red Light" run will carry a two second penalty.
2.3.3 Drivers exceeding the safety shut down area after the finish of the drag race will receive a "No Time" for their run.

2.4 Ties
2.4.1 Ties on individual course will remain as a tie and the drivers will each receive the same points value.
2.4.2 Ties in final event points will be broken based on the time from the AutoX challenge.

3. Championship

During the Car and Driver Race Series each driver's best one of their first two event scores will count toward the class championship. Drivers will be ranked by their point totals. The Championship event will consist of one event with 100 points available. The drivers in each class with the most points from the regular season and the Championship event combined will be declared the Champion. If a class is unattended at the Championship event a champion will not be declared for that class.

4. Driver Participation

4.1 Driver Requirements
4.1.1 All Drivers must sign the current waiver form.
4.1.2 Drivers under the age of 18 must have a current "Minor Release and Waiver of Liability and Indemnity Agreement" signed by his/her parent(s) or guardian. Other waiver forms may not be used.
4.1.3 All Drivers must have a valid Driver's License.

4.2 Driver Safety
4.2.1 Drivers are required to wear a SA90 or higher helmet and a minimum of original equipment safety belts.
4.2.2 Aftermarket shoulder harnesses are not allowed in convertibles without a roll bar.

4.3 Drivers in the Same Car
4.3.1 There may up to 2 Drivers competing in the same car per Run Group. Both drivers may compete in the same class.
4.3.2 A car may not have more than four drivers per event.
4.3.3 The same car may be entered in multiple classes provided it does not interfere with the established schedule. There is no guarantee the event schedule will accommodate multiple entries in the same car

4.4 Conduct
4.4.1 Drivers are ultimately responsible for their conduct and the conduct of their support personnel.
4.4.2 All participants are expected to conduct themselves in a professional manner. Unsportsmanlike conduct will not be tolerated.
4.4.3 The use of alcohol or illegal drugs on site is prohibited. Any driver on prescription medication is encouraged to notify a Precision Racing Official.
4.4.4 Physical violence, verbal assault, and acts of intimidation will not be tolerated.
4.4.5 It is illegal to give, attempt to give, or to receive a bribe of any kind.

5. Vehicle Requirements

5.1 Classification
5.1.1 In order to be classed at least a 1000 models must be available, fully assembled, in the United States during a calendar year.
5.1.2 The Classics Class is intended for vehicles that do not meet the above requirements but are legal for street use. This would include kit, vintage, replica and special interest cars.
5.1.3 Vehicles such as full size SUVs, pick up trucks and vans may be excluded from competition due to an increased roll over risk

5.2 Modification
5.2.1 With the exception of the points modification claimed, cars are required to compete with all original specifications and equipment or replacement parts of identical specifications. Any part available as a factory option package may only be utilized if the entire package is in place and the package was available for that model year. Items typically replaced regularly and bearing no significance on performance such as light bulbs or fasteners (nuts, bolts) may be replaced but not removed. Replacing or modifying bolts such as suspension bolts for the purpose of gaining a performance advantage is strictly forbidden without a manufacturer's part number.
5.2.2 It is the driver's responsibility to properly classify their car. Any and all classification assistance given by Precision Racing Officials or by the Precision Racing Organization Web site should not be taken as final word. While great effort is made to ensure all questions are answered correctly, competitors are strongly encouraged to properly research any classification issue.
5.2.3 A non-standard part is considered to be any part that is not available on the vehicle as original equipment. This includes but is not limited to dealer options, such as wheels and appearance kits, aftermarket products and home built modifications. Simply, if it is the original vehicle configuration, it is considered non-standard.
5.2.4 Non-Standard parts listed in the classification works sheet should be viewed within the narrowest definition. Not to say there is not room for interpretation and creativity, but, for example, a supercharger is never a cold air intake, regardless of air temperature.
5.2.5 Compound modifications carry the points value for all aspects of the modification, unless specifically allowed within the modification worksheet. For example, a normally aspirated vehicle that has had a motor out of a turbo charged car must carry the points for both the non-standard motor as well as the induction system.

5.3 Technical Inspection
5.3.1 In order for a car to be deemed fit for competition, it must pass an inspection of the following items by a Precision Racing Official:
a. The passenger compartment must be free of loose objects
b. All exterior trim items must be secure
c. Hub caps must be removed
d. Wheels must be secure (lug nuts and hub bolt are tight)
e. Wheels must be free of structural damage (cracks, breaks, etc)
f. Tires may not show cord
g. Tires must have measurable tread depth
h. Seatbelts, seats, pedals, and steering wheel must be properly installed and functional
i. Two-strap shoulder harnesses may not be worn in open cars which are not equipped with roll bars
j. Helmets must have a rating of SA/M 90 or newer
k. Knobs or spinners on the steering wheel are not allowed
l. The brake pedal should be firm and the fluid reservoir should be full
m. Batteries must be secure
n. Cars must be free of leaks
o. All caps and fluid lines must be attached properly and secure
p. There must be an active throttle return (spring)
q. All suspension, steering, and hub components should be fully functional and secure
r. Exhaust systems may not terminate forward of the driver

5.3.2 Precision Racing Organization holds the right to deem a car unfit for competition.
5.3.3 Once a car exits the technical inspection area no changes to the car may be made unless approved by a Precision Racing Official. Changes will only be approved in the event of a mechanical failure or a dramatic change in weather or course conditions.

Modifications

Bodywork/Chassis | Interior | Electrical System | Engine | Transmission and Clutch | Exhaust | Forced Induction | Intake | Engine Control Unit/Emission Control Devices | Fuel | Brakes | Suspension | Tires | Wheels

Any car is welcome to compete as long as it meets the minimum specifications in each category
The current ruleset is provisional pending final revisions. The final rulebook will be available on April 1st.

General

Minimal Requirements
All cars competing in the CAR and DRIVER Race Series must at a minimum meet these requirements.

Restrictions
Restricted modifications are not permitted in any class of the CAR and DRIVER Race Series unless specific allowances are made.

Allowances
Modifications that are allowed without penalty that facilitate installation of approved modifications.

Free Modifications
Free modifications are allowed in all classes without an accumulation of points.

Points Modifications
All approved modifications that are deemed to have a competition advantage are assigned a points value. A car's total points accumulation determines classification.

Open Modification
Extreme modifications that are not expressly restricted may be made for a flat points total. These modifications are only allowed in Modified and Unlimited classes.


Bodywork/Chassis

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Minimal Requirements
The following road-going equipment must be retained and functional:

  • Headlights (high and low beam)
  • Turn signals (front and rear)
  • Brake lights
  • Hazard lights
  • At least one front windshield wiper
  • All glass must remain Stock

Restrictions

Seam welding of the uni-body is explicitly forbidden.

The uni-body chassis structure, consisting of the main stamping assembly that forms the firewall, floor pan, rear quarter panels, and any permanently attached structure, must remain stock.

Allowances

Holes may be drilled for the single purpose of mounting bodywork.

Factory tow hooks may be removed to facilitate the installation of a trailer hitch.

Nonstandard wings may replace factory wings or spoilers.

Free Modifications

Nonstandard headlight kits may be used.

Nonstandard taillight kits may be used.

Driving lights may be added.

LED and/or neon accessories may be added.

A single functional trailer hitch may be added to the rear of the car.

Points Modifications

1 Removal of factory trim items (badges, rub strips, etc.)
1Addition of hood pins
1Replacement mirror(s)
5 Addition of a chin spoiler and/or front splitter
10 Rolling of factory fenders (accommodation of larger wheels)
25 Flared fenders
15 Addition of a wing to the rearmost deck or hatch with the the following limitations:
a. Wing may have no more than two elements.
b. Elements may not have a total width of more than 8 inches.
10 Removal of a factory wing
15 Addition of a rear spoiler with the following limitations:
a. Spoiler is defined as a solid piece.
b. Spoiler may only be added at the rearmost point.
c. Spoiler is restricted to an extension of 10 inches.
15 Replacement carbon fiber hood without functional vents or scoops
25 Replacement carbon fiber hood with functional vents or scoops
30 Aftermarket appearance kits with the following limitations:
a. Standard exterior parts (decks, fenders, hoods, etc.) may not be removed or replaced unless otherwise listed.
b. Bumper covers, valances, and mirrors may be replaced with pieces of similar weight and materials. All OEM crash structure (bumpers, etc.) must be retained.
c. Accessory trim may not extend more than 6 inches from the original bodywork and no more than 6 inches under the car from where the underbody begins.
d. Side skirts or ground effect kits must have at least one inch of ground clearance.
e. The width of front or rear spoilers may not exceed the width of original bodywork of the car.
f. Vents and/or scoops in nonstandard locations and sizes are not allowed.
95 Aftermarket body kits with the following allowances:
a. Lightweight materials such as carbon fiber and aluminum may be used.
b. Replacement front fenders, hoods, front fascias/bumper covers, and rear fascias/bumper covers may be replaced.
c. Vents and or scoops may be added.

Open Modification
100* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 100 points
*Automatically bumps to Modified Class

Interior

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Minimal Requirements
The following trim and equipment is required on all cars:

  • Full-size dashboard
  • Headliner
  • Driver and passenger seats
  • Front door panels
  • All carpet and panels forward of the B pillar
  • Fully-functional hand or emergency brake

Restrictions

The driver's side floor mat and any loose items must be removed from the car prior to competition.

Either the driver seat or both the driver and front passenger seats may be replaced.

If both seats are replaced they must be of the same dimension and design.

Seats must be fully padded.

Any resulting holes in the interior must be paneled over.

Allowances

Items that are not held in place by fasteners may be removed.

Minor modification to allow roll structure clearance is allowed.

The spare tire, associated tools, and covers may be removed provided that the covers can be removed without cutting and without the use of tools.

Radios, speakers, and the associated wiring may be replaced or removed.

Free Modifications

Any seat pad or cushion is allowed.

Approved racing harnesses may be added, however this does not allow for the removal of OEM safety belts.

A harness bar may be used but may serve no other purpose.

Any interior gauge or light, including a shift light, may be added provided that the intent of the device is to inform the driver and in no way affects the performance of the car.

Data loggers may be used.

Any secure shift knob may be used.

Pedal covers or replacement pedals that are secure, non-slip and capable of being independently operated may be used.

Points Modifications

5 Replacement of a non-airbag steering wheel with any nonstandard steering wheel
5 Replacement of an airbag-equipped steering wheel with a nonstandard airbag-equipped steering wheel
25 Replacement of an airbag-equipped steering wheel with a nonstandard non-airbag steering wheel
10 Replacement of front seat(s) with reclining two piece seat(s)
15 Replacement of front seat(s) with fixed-back racing-style seat(s)
20 Removal of rear seat(s)
50 Addition of a roll bar or roll cage that meets the following limitations:
a. Roll structures must meet the minimal requirements for a nationally recognized drag racing or road racing sanctioning body.
b. Roll cages may not have more than 8 points of attachment to the chassis.
c. Roll bars may not have more than 4 points of attachment to the chassis.
d. Roll structures may be bolted or welded in.

Open Modification
150* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 150 points
*Automatically bumps to Modified Class

Electrical System

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Minimal Requirements
None

Restrictions

Relocated batteries should be mounted in the trunk. In hatchbacks batteries should be placed behind the rearmost seat.

Nonstandard alternators or generators must produce at a minimum the standard amount of electrical output.

Nonstandard batteries must be of standard voltage.

The number of batteries may not be changed.

Allowances

Longer cables may be used for battery relocation.

Holes may be drilled only for the purposes of mounting or running cables related to the battery.

Free Modifications
None

Points Modifications
5 Nonstandard battery (i.e. deep cycle, sealed, lightweight, etc.)
5 Battery relocation
10 Use of a nonstandard starter in the standard location
10 Use of a nonstandard generator or alternator in the standard mounting location
Open Modification
100* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 100 points
*Automatically bumps to Modified Class

Engine

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Minimal Requirements

Engines must be self-starting.

Restrictions

Engines may only be located within the original engine compartment.

Allowances

Alternate throttle linkage and connections to facilitate installation of allowed induction systems are permitted but may serve no other purpose.

Ignition timing on a distributor ignition system may be set at any point that can be achieved without modifying or replacing the factory hardware.

The air conditioner may be removed in whole or in part.

Free Modifications

Any oil, coolant, hydraulic fluid or grease including synthetics may be used.

Any oil filter may be used.

Cosmetic modifications such as wire covers, valve covers, caps or chrome accessories may be added provided they do not enhance performance.

Alternate thermostats may be used.

Appearance modifications to valve and cam covers are allowed. No other modifications to the valve and cam covers are allowed (i.e. installing a breather).

Delayed shut down and remote start devices are allowed provided they serve no other purpose.

Engines may be re-bored with the following limitations:

  • a. Overbore may not exceed .020 of an inch.
  • b. Sleeving is allowed as long as the bore is within the 0.20 allowance.
  • c. Pistons must be from the original equipment manufacturer or of identical or greater weight, identical configuration and construction (either standard or first overbore).
  • Points Modifications
    1 Addition of a catch tank
    1 Addition of heat shields
    1 Replacement of hoses with hoses of nonstandard materials
    15 Nonstandard, non-metal motor and transmission mounts and locators
    25 Nonstandard metal motor and transmission mounts and locators
    20 Nonstandard under-drive pulley(s)
    15 Nonstandard cam gears
    200 Nonstandard cam shaft(s)
    250 Any or all of the following:

    a. Balancing and or lightening of rotating or reciprocating parts
    b. Intake and exhaust port matching (if no change is made of more than one inch from the port manifold interface)
    c. Removal Replacement or modification of the engine fan and associated parts that serve no other purpose
    d. Addition of electric fan(s)
    e. Installation of a trigger ring to the crankshaft or the crankshaft pulley may be modified to serve as one
    f. Removal of the standard distributor(s)
    g. Use of a plate to cover the distributor-mounting hole
    h. Addition of accusump type systems
    i. Addition of any oil cool
    j. Cylinders re-bored within the following guidelines:
    • Maximum overbore is .0472 in.
    • The standard oversize piston may be substituted.
    • Pistons may be cast or forged.
    • Aftermarket pistons of the same dimensions and configuration as stock may be used. Replacement pistons must be of equal or greater weight as the stock pistons.

    k. The engine cylinder head(s) may be milled only to that amount specified in the manufacturer's workshop manual. If no amount is specified then the maximum amount is 0.010 in.
    l. A single bolt-on torque suppression device may be used with the following restrictions:
    • A torque suppression device must attach the engine to the body, frame, or sub-frame in only one location.
    • A torque suppression device may only control engine movement at that location along a single axis.
    • It may serve no other purpose.
    • A chain, rod with spherical bearings at each end, or similar device may be used.
    • Solid motor mounts, engine mounting plate, or any link which confines movement along more than one axis may not be used.
    • Holes may be drilled to mount a torque suppression device.
    • Welding is not allowed to install a torque suppression device.
    450 Engines within the following limitations:
    a. Engines must use an engine block based on a road-going production design.
    b. Engines must be of a make/brand that matches a make/brand of engine that was available as a factory-installed option in that model car. For the purposes of this rule, manufacturers who are related only at a corporate level (i.e. Ford/Mazda, Mercedes/Chrysler) are not considered interchangeable. Brands that are marketing aliases for the same manufacturer (ex Acura/Honda, Lexus/Toyota) are considered interchangeable.
    c. Transmissions, engine controls, manifolds, intake systems, exhaust systems, drive axles, differentials, and hubs that come standard with the substituted engine may be used without further points assessment, provided the induction style remains standard to the original chassis
    Open Modification
    500* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 500 points
    *Automatically bumps to Modified Class

    Transmission and Clutch

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    Minimal Requirements
    Vehicles must have 2 forward gears and 1 reverse gear.

    Restrictions

    None

    Allowances

    Holes may be drilled for clutch and transmission lines and cables.

    Free Modifications

    Hydraulic clutch lines may be replaced with braided or solid metal lines.

    Tethers that secure axles and drive-shafts in the event of a failed coupling or universal joint may be installed provided they serve no other purpose.

    Any transmission oil cooler may be used.

    Points Modifications
    5 Short throw shift kit
    5 Nonstandard mechanical shift linkage
    50 Any nonstandard flywheel or a factory flywheel lightened beyond the factory specification
    50 Nonstandard clutch assembly or torque converter that meets the following limitations:
    a. Construction must be entirely metal unless otherwise listed.
    b. The standard attachment to the crankshaft must be used.
    c. Nonmetallic friction surfaces such as clutches may be used.
    d. Dowel pins may be added.
    e. Minor relocation of the standard clutch slave cylinder is permitted if needed to install an alternate clutch. Relocation may serve no other purpose and the slave unit must function as standard.
    225 Nonstandard limited slip and locking differentials with the following guidelines:
    a. Differentials may be welded or mechanical in design.
    b. Any machining required for installation of a limited slip differential is allowed provided that material is only removed and that the machining serves no other purpose.
    c. Modification to the exterior of the differential case is prohibited.
    Open Modification
    250* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 250 points
    *Automatically bumps to Modified Class

    Exhaust

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    Minimal Requirements

    Exhaust must exit behind the driver.

    Restrictions

    None

    Allowances

    Heat shields may be removed as part of a header or exhaust system installation.

    Free Modifications

    None

    Points Modifications
    15 Replacement or removal of the exhaust system from the final catalytic converter back
    20 Nonstandard exhaust manifold or headers
    25 Replacing factory catalytic converter(s) with a high flow unit(s)
    75 Removal of factory catalytic converters
    Open Modification
    100* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 100 points
    *Automatically bumps to Modified Class

    Forced Induction

    top Minimal Requirements

    None

    Restrictions

    None

    Allowances

    Holes may be cut to route intercooler piping.

    Aftermarket waste gates are allowed with use of nonstandard manifolds.

    Free Modifications

    None

    Points Modifications
    10 Fuel cut defender
    10 Non standard blow off valve(s)
    100 Boost controller or any device that alters boost levels
    100 Nonstandard supercharger pulley
    150 Nonstandard exhaust manifold
    150 Nonstandard intercooler
    250 Addition of a turbo to a normally aspirated engine
    250 Addition of a supercharger to a normally aspirated engine
    Open Modification
    400* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 400 points
    *Automatically bumps to Modified Class

    Intake

    top Minimal Requirements

    None

    Restrictions

    Modifications to original-equipment forced-induction systems are not covered within this section.

    Addition of aftermarket forced induction systems are not covered within this section.

    Allowances

    Holes may be cut to install intake tubing.

    Free Modifications

    The air filter may be replaced or removed provided that the air cleaner is properly closed. The remainder of the intake system may not be altered.

    Points Modifications
    20 Cold air intake or short ram intake systems that meet the following restrictions:
    a. The air intake system may only be modified up to the carburetor, throttle body or compressor inlet (whichever comes first).
    b. All inline sensors must retain their function.
    50 Nonstandard carburetor(s) or throttle body(s)
    100 Nonstandard intake manifold
    Open Modification
    200* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 200 points
    *Automatically bumps to Modified Class

    Engine Control Unit / Emission Control Devices

    top Minimal Requirements

    None

    Restrictions

    Any device that alters boost levels is defined as a boost controller and is covered in the forced induction section

    Allowances

    Minor modifications may be made to allow for installation of approved modifications

    Free Modifications

    None

    Points Modifications
    20 Any device that alters the timing of factory electronic variable valve timing systems (i.e. VTEC controllers)
    20 A reprogrammed ECU in the standard housing that does not alter boost
    20 Any and all electronic components that alter the signal between an engine's sensors and ECU
    100 Open modification or substitution of the ECU
    100 Modification, replacement or removal of emission control equipment
    195 Addition of or modification to traction control systems
    Open Modification
    200* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 200 points *Automatically bumps to Modified Class

    Fuel

    top Minimal Requirements

    None

    Restrictions

    Nitrous oxide injection systems may not be functional during competition. The nitrous supply bottle(s) must be removed from the car at all times while on site.

    Allowances

    Any octane of pump gasoline or diesel may be used.

    Free Modifications

    Any fuel filter may be used

    Points Modifications
    95 Racing gasoline (95+ Octane)
    50 Any modification to the fuel lines and/or pumps limited by the following:
    a. Modifications must not pose a safety hazard.
    b. Lines may not have more than a half inch inward diameter.
    c. Lines must connect either to the stock gas tank or a tank meeting the requirements for gas tanks in this section.
    d. Lines may be not longer than necessary.
    e. A single fuel feed line may be used.
    f. A single fuel return line may be used. The fuel return line should connect near the top of the tank. Fittings to connect the return line to the tank may be added.
    g. Cool cans are not allowed.
    95 Fuel cells and alternate tanks approved by any nationally recognized road racing or drag racing sanctioning within the following allowances:
    a. Replacement cells may be no more than 20% smaller than standard.
    b. Replacement cells must be attached within 6 inches of the standard location.
    Open Modification
    100* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 100 points *Automatically bumps to Modified Class

    Brakes

    top Minimal Requirements

    All four wheels must have functional brakes.

    Restrictions
    None Allowances

    The original bodywork of the car may be altered for the installation of brake ducts.

    Free Modifications

    Any brake pad or shoe that fits the original equipment may be used.

    Brake bleeding devices such as "Speed Bleeders" may be used.

    Points Modifications
    1 Removal of any or all shields, plates, or guards that do not serve a dual purpose
    5 Addition of air ducts for cooling brakes provided they serve no other purpose
    10 Nonstandard solid metal or braided metal hydraulic brake lines
    10 Brake rotors made of a non-ferrous material (e.g. carbon fiber, titanium, etc.)
    25 Nonstandard caliper and rotor kits that are larger or equal to standard rotor diameter
    Open Modification
    100* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 100 points
    *Automatically bumps to Modified Class

    Suspension

    top Minimal Requirements

    All suspension parts must mount to the chassis structure using the OEM suspension mounting holes, and these holes must remain unmodified.

    Restrictions

    Mounting holes cannot be moved, enlarged, slotted, or re-enforced.

    No additional mount points may be welded to the chassis, nor may additional holes be drilled.

    Shocks may not be capable of adjustment during a competition run.

    Cars must use the same number and type of shocks as standard.

    The following restrictions are allowed in Unlimited Classes:

    *Any modification not specifically allowed that alters the suspension geometry.

    *Springs must be of the original type (leaf, coil, torsion bar) and must use the original attachment point.

    *Other than standard original equipment, shocks may not be electronically controlled.

    *Offset shock absorber bushings are not allowed.

    *The material, dimension and design of the bushing that attaches the end of the strut to the body or frame may not be altered.

    *Bump stops may not be enlarged, thickened or lengthened in any way.

    *Shock mounts that utilize a bearing may not be altered.

    *The points and method of shock attachment may not be altered.

    *Stock bushings that allow for multi-axis motion by the compliance of the component material may not be replaced by a bushing of a differing type that would allow such motion.

    *No part of the car may be altered to install a sway bar with the exception of drilled holes for mounting bolts.

    Allowances

    The hole of the upper shock mount may be enlarged no more than the amount necessary to accommodate a larger shock shaft. This may not effect alignment or suspension geometry.

    Variances in ride height caused by altering the dynamic characteristics rather than the hardware of the shocks are allowed.

    For the purposes of modifications, bushings and end links are considered part of the sway bar.

    Free Modifications

    Alignment settings are unrestricted provided that the standard suspension parts are not bent, shimmed, cut or modified in any manor unless it is expressly permitted by the manufacturer as a repair procedure.

    Crash bolts, shims, modified mounting holes or other methods of repair that are issued or referenced by the manufacturer may be used. If the specifications of the part or modification are ambiguous the maximum alignment specification as set by the manufacturer will determine compliance.

    Shock absorber bushings may be made of any material.

    Any sway bar bushing material may be used.

    Cars with lever type shocks may substitute tube type.

    Points Modifications
    Springs
    15 Lowering the car below factory specifications by factory adjustable parts
    15 Utilizing factory springs with non-factory spring perches, perch location, spacing blocks or hangers
    50 Aftermarket sport springs that are not adjustable for ride height
    100 Aftermarket springs with adjustable spring perches (i.e. coil-overs)
    Shocks
    5 Reduction modifications or removal of bump stops
    100 Nonstandard shocks with up to point of adjustment
    200 Nonstandard shocks with two points of adjustment
    300 Shocks with remote reservoirs and/or unlimited points of adjustment
    Bushings
    30 Suspension, steering rack, differential, sub-frame, shifter, bushings made of any material except metal where the amount of metal (i.e. bolt sleeves) is not increased
    75 Suspension, steering rack, differential, sub-frame, shifter, bushings made in part or in whole of metal
    Camber Kits
    40 Addition of camber kits within the following guidelines:
    a. Camber plates may be installed at the top of the strut of cars with strut type suspensions.
    b. Factory mounting holes may be slotted.
    c. Holes may be drilled for installation purposes.
    d. The center hole clearance may not be modified.
    e. Bearings or bushings of any kind may be used to attach the adjustable camber plate to the strut including an alternate upper spring perch or mounting block (bearing mount).
    f. On cars that do not have strut type suspensions camber kits may include replacement control arms or other parts designed specifically to compensate for camber changes that result from lowering the car. The original attachment points must be used
    g. Double arm suspensions may only replace or modify a single arm per corner
    Strut Bars
    25 Bolt-on strut bars within following guidelines:
    a. Strut bars may only be mounted from upper-right to upper-left or from lower-right to lower-left
    b. Mounting holes may be drilled.
    c. Only bolt-on attachment is allowed.
    d. A maximum of 4 bars is allowed.
    Sway Bars
    15 Removal of any number of factory sway bars
    25 Replacement of a Single Front or Rear Sway bar
    50 Replacement of both a front and rear sway bar
    50 Addition of lateral supports between brackets
    Open Modification
    400* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 400 points
    *Automatically bumps to Modified Class

    Tires

    top Minimal Requirements

    All tires must be DOT approved

    Tires must have a measurable tread depth and may not display any cord.

    Restrictions

    Hand grooving is not allowed.

    Re-caps of any kind are not allowed.

    Precision Racing Organization reserves the right to exclude a tire if the performance greatly exceeds the published specifications.

    Allowances

    Any OEM tire may be used.

    Free Modifications

    Any tire with a tread wear rating of 200 or greater

    Points Modifications
    200 Any tires with a tread wear rating of 100-199
    250 Any tires with a tread wear rating of 99 or less
    Open Modification

    None


    Wheels

    top Minimal Requirements

    Wheels of any design, construction, or materials may be used provided they pass a technical inspection.

    Restrictions

    None

    Allowances

    None

    Free Modifications

    Any lug nut may be used.

    Longer wheels studs or lug bolts may be substituted.

    Lug Bolts may be replaced with studs.

    Any factory option wheel may be run with no penalty.

    Cars with a factory wheel width of less than 7 inches may run a wheel up to 7 inches wide without additional penalty.
    and/or

    Cars with a factory wheel diameter of less than 15 inches may increase diameter up to 15 inches without additional penalty.

    Points Modifications
    1 Wheel Spacers
    After market and dealer option wheels may be run with the following guidelines:
    50 Per inch of width over factory width or 7 inches, whichever is greater
    25 Per inch of diameter increase over standard or 15 inches, whichever is greater
    25 Per inch of diameter decrease
    Open Modification
    100* Any and all other modifications that meet the minimal requirements but do not exceed the restrictions, or any combination of modifications that exceeds 100 points
    *Automatically bumps to Modified Class
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