MINI STOCK RULES

1. ELIGIBILITY
   Any driver meeting proper qualifications that hasn’t won a race or championship in a higher division within the past (3) years.
2. 2. COMPETING MODELS
   Year models 1975 and later American or import autos. No station wagons, Jeeps, or convertibles.
3. CAR WEIGHT
   3-1: All cars must maintain a minimum weight of 2250 pounds. (Exception: Toyota models with 2000cc motor)
   3-2: All weights are with driver in car.
   3-3: Added weight must be painted in white in block form of no less than five pound blocks (no pellets). Added weight must be securely bolted in place with minimum of 3/8” bolts. No weight may be added to the outside of the frame rails. Additional weight may not be ahead of the front spindles and not behind the fuel cell. Dislodged weight cannot be returned to car for weighing after race.
   3-4: All cars must maintain a weight of 1 pound per CC of engine size.
   3-5: Left side weight (with driver in car) may be no more that 55 percent of total car weight. 3-6: Correct minimum car weight must be displayed on the left front upper door of the car. 3-7: Engine size in cubic centimeter (CC) must be displayed on the hood of the car, and must be readable from the left (driver) side of the car.

3-8: Tube-type chassis may be required to add an additional 200 pounds, as directed by track officials

1. CAR BODIES
   4-1 GENERAL BODY REQUIREMENTS A: Body must be stock appearing in all dimensions. B: Fabricated floor pans, trunk floor, front and rear inner wheel wells permitted, but must conform to original dimensions and location. C: Manufacturer of body and engine can be the same (GM in GM, Ford in Ford, etc.) but after market body panels will be allowed. Bodies must be stock appearing in all respects. Hoods must fit. Weight may be added to offset competitive advantage due to lighter body panels. If fiberglass roof is used, a 1/8″ metal plate is required over driver compartment, full coverage is recommended.
   4-2 SPOILERS A: Front spoilers must maintain a minimum ground clearance of 4 inches. Front
   spoiler must be a minimum of 5 inches from the leading edge of the front bumper. B: Rear spoilers may be a maximum of 5 inches and no wider than deck lid.
   4-3 WINDSHIELD A: All cars must be equipped with a full front windshield. B: Windshield must be
   in stock location. C: Windshield must be Lexan, minimum 1/8” inch thick. D: The front window must be secured with a minimum of two metal straps on the outside minimum 1” wide by 1/8″ inch thick, evenly spaced, and bolted to the roof at the top and the dash or firewall support panel at the bottom. The inside of the windshield should supported by at least two (2) metal braces.

4-4 REAR WINDOW A: Rear window is optional. B: Rear window must be installed in original position if used. Only clear polycarbonate glass may be used in the rear window opening. The rear window must be secured with a minimum of two metal straps on the outside minimum 1” wide by 1/8″ inch thick, evenly spaced, and bolted to the roof at the top and the deck support panel at the bottom.
4-5 SIDE WINDOW/ WINDOW SCREEN A: All side and quarter window glass must be removed. A nylon mesh screen must be installed in the left side door glass opening. The window screen must be a rib type made from ¾” wide, maximum 1” nylon material with a minimum 1” square opening between the ribs. The minimum window screen size shall be 22” wide by 16” tall. All window screen mounts must be a minimum ½” steel rod at bottom and minimum 1” wide by 3/16” flat steel or a minimum ½” diameter steel rod on the top with mounts welded to the roll cage. The window screen, must fit tight and be secured with a quick release type latch at the top in front only. B: Only clear polycarbonate glass may be used in the quarter window.
4-6 HEADLIGHTS/PARKING LIGHTS A: Headlight, taillight, and parking light openings must be covered with aluminum.
4-7 REAR VIEW MIRRORS A: Rear view mirror will be permitted. Wink type three-dimensional
mirror permitted with a maximum width of 26 inches. Rear view mirror cannot extend outside of the car.
4-8 DASHBOARD A: All cars must have a complete dashboard or similar design fabricated out of 20 gauge sheet metal or aluminum.
4-9 FIREWALL A: Firewall must remain stock and remain in stock location. Fabricated firewalls
not allowed. B: A rear firewall of not less than 22 gauge magnetic steel must separate the driver
from fuel cell. C: The firewalls must be sealed and welded in place.
4-10 DOORS A: Door panels must be a minimum 20 gauge steel, remain in the stock position
and conform to original dimensions. B: Doors must be attached in an approved manner.
4-11 FENDERS AND QUARTER PANELS A: Fenders and quarter panels may be trimmed for
tire clearance only. The inner fenders may be removed and crush panels installed, albeit safely and neat appearing. B: Original contours of the factory body must be followed.
4-12 GRILLES A: Grilles may be covered with unpainted screen wire attached to the grille only.
B: Screen wire must be porous. C: Closed grilles will not be permitted for racing. Grille may be taped for qualifying. D: Grille opening must be no wider than radiator. No ducting of air past radiator into engine compartment. E: All air that enters the grille area must pass through the radiator core.
4-13 HOOD/ROOF A: Hood must maintain stock configuration may not be altered for air cleaner or
engine clearance. B: Hood must lay flat and fit with no holes or bubbles in the center. C: Hood must be sealed front and rear to prevent the introduction of outside air into the engine compartment. D: Roof must be stock for make and model of car. No chopping or lowering of roof allowed.
4-14 DECKLID A: Rear deck lid must be in operating condition. B: Trunk around fuel cell must be complete.
4-15 BUMPERS A: Front and rear bumpers must remain in standard location for make and model
of car.

1. ENGINE
   5-1 ENGINE LOCATION A: Engine must remain in stock location. B: No adjustable engine mounts
   allowed.
   5-2 GENERAL ENGINE SPECIFICATIONS A: Four cylinder engine only. No Cosworth or rotary engines allowed. B: No factory or after-market high performance components will be allowed in the engine or drive train.
   5-3 ENGINE BLOCK A: Block must be standard factory production with standard external
   measurements in all respects. B: Internal polishing, porting and/or relieving will not be permitted.
   5-4 CYLINDER HEADS A: Cylinder heads must be standard production. B. Single and dual wire springs are ok. C: No porting, polishing, cutting, grinding or modifying of heads permitted. D: Area under valves must remain factory stock. E: Only two valves per cylinder allowed. F: No angle milling of heads allowed. G: Valves must be the same size and dimensions as stock and be made of steel. H: Head may be surfaced to insure a flat surface, but excessive cutting in order to decrease combustion chamber size is not allowed.
   5-5 CRANKSHAFT A: Only stock steel or cast production crankshaft permitted. B: Journal size on
   main and rods bearings must be stock. Maximum tolerance .040 inches. Must maintain factory stroke, no lightening of crankshaft.
   5-6 PISTONS A: May use stock or aftermarket cast or forged pistons. B: No part of
   piston may extend above the block. Toyota factory dome pistons are permitted.
   5-7 RODS A: Rods must be steel; all measurements must remain identical for make and model of the engine. This includes journal and wrist pin size. B: Rods must be solid with no holes. C: No billet rods allowed. D: Maximum length 5.7 for Fords.
   5-8 CAMSHAFT A: Only steel camshafts permitted. B: Maximum lift optional. Adjustable timing gears optional.
   5-9 LIFTERS A: Stock solid or hydraulic steel lifters permitted. B: Lifter diameter and height must be standard for make of engine being used. C: No roller or mushroom type lifters allowed.
   5-10 ROCKER ARMS A: Stock rocker arms only. No roller rockers allowed.
   5-11 INTAKE MANIFOLD A: Only stock non-high performance intake allowed. B: No porting or
   polishing allowed on intake.
   5-12 CARBURETOR A: The Holley 2300 HP two (2) barrel carburetor, part number 80787-1, with
   a venture size of 1-3/16 inches and maintaining a throttle bore maximum size of 1-1/2 inches
   is permitted. Holley 2300 two (2) barrel carburetor model 7448, will also be permitted. B: Rework guidelines will follow same rules as LMSC 2006, see track official for clarification. C: All boosters must be safety wired.

5-13 AIR CLEANER AND AIR FILTER A: Only stock or approved round air cleaner allowed. B: No funneling of air to carburetor allowed. The top and bottom of the air filter housing must be solid and the same diameter. No lips or rounded edges are permitted. The air filter housing must be the same size as the air filter element. The air filter housing must be centered and level on the carburetor. The bottom of the air filter housing must be lower than the top of the carburetor choke horn. No tubes, tunnels or any device which may control the flow of air is permitted inside of the air cleaner or between carburetors. The air filter element may not be sprayed or soaked with
any type of chemicals or liquids. C: No fresh air induction allowed. D: No velocity stacks allowed.
5-14 WATER PUMP A: Only stock water pumps allowed. B: Only standard production steel v-type
or serpentine type belt and pulleys permitted.
5-15 FAN A: No flat or freewheeling fans allowed. B: Electric fans permitted.
5-16 ENGINE OILING SYSTEM A: The oil pans may be extended a maximum of 2 inches by cutting the bottom of a stock pan adding a two inch extension and welding the original sump back to the extension. B: Baffles and windage trays may be added as long as it is a permanent part
of the oil pan. C: No crankshaft scrapers allowed. D: No accusump systems or external oil pumps
allowed. E: No external oil coolers allowed. F. No crankcase evacuation allowed.
5-17 EXHAUST SYSTEM A: Headers may be used. B: All exhaust pipes must be routed beneath
the transmission and exit to the outside of the car in front of the rear wheels. C: No thermal wrap allowed on exhaust system.

1. ELECTRICAL
   6-1 IGNITION A: Only stock type distributor permitted. B: Only stock type coils permitted. C: Mel’s ignition is ok (No ignition amplifiers allowed).
   6-2 BATTERY A: One (1) standard automotive 12 volt battery, not to exceed 13.5 volts, will be
   permitted. B: The battery must be installed in an enclosed battery box, complete with a cover,
   located behind the front spindle in front of the firewall, or inside the interior of the car behind the
   driver’s seat.
   6-3 ELECTRICAL SYSTEMS A: All electrical switches must be operable and must be located
   within reach of the driver, except the labeled on-off master switch which must be located on the
   front of the dash panel in the center. The on-off master switch must be wired to the battery cable
   in a manner that would cut off all electrical power to the car.
2. DRIVE TRAIN
   7-1 CLUTCH A: Clutch assembly must remain stock. B: Hydraulic slave cylinders allowed.
   7-2 FLYWHEEL A: Flywheel must be stock. B: Flywheel must be original in configuration in
   all respects for make and model of car. C: No aluminum flywheels allowed. D: Minimum flywheel
   and clutch assembly weight allowed is 23 lbs.
   7-3 STARTER A: The self-starter must be in working order and in the stock location. After market starters will be permitted.
   7-4 BELLHOUSING A: A 2 inch hole must be drilled in bottom rear for inspection.
   7-5 TRANSMISSION A: Only standard production manual transmissions allowed. B: All forward
   and reverse gears must be in working order. C: No quick change transmissions allowed. D: No
   automatic transmissions allowed.
   7-6 DRIVESHAFT A: Drive shaft and universals must be standard to production type. B: Drive shaft must be magnetic steel and painted white. C: Only one piece driveshaft’s allowed. D: It is mandatory that (2) magnetic steel brackets, no less than 2 inches wide and 1/4 inch thick and be placed around the driveshaft and welded to the cross member of the car, one in the front 1/3rd of the driveshaft and one in the rear 1/3rd.
   7-7 REAR AXLE A: Rear end housings must remain stock. B: No quick change rear ends allowed. C: No cambered rear ends allowed. D: Rear ends may be interchanged between automobile manufacture. E: No adjustments on rear axle housing permitted. (Adjustable Heim Joints).
3. FRAMES
   8-1 GENERAL FRAME SPECIFICATIONS A: Factory production full frames or unibodies may
   be used. Unibodies may be used provided front and rear frame rails are tied together using 2” x
   3” tubing (minimum .120 wall thickness) and extending a minimum of 10” into the existing rails and securely welded. B: Frames or unibodies cannot be interchanged between manufacturers. C: All frames or unibodies must retain original manufacturer’s components. D: Offset or tube frames subject to inspection and possible weight penalties.
4. SUSPENSION
   9-1 COIL SPRINGS A: Heavy duty springs may be used provided they are similar in design to the
   original equipment. B: No coil over suspension or coil over eliminators allowed. C: Weight jacks allowed but no adjustments permitted under racing conditions. D: No hydraulic or mechanical weight shifting devices allowed.
   9-2 SWAY BARS A: Stock sway bars only. After market sway bars are not permitted. B: Sway
   bars must mount in stock location. Heim joints permitted.

9-3 SHOCK ABSORBERS A: Only one (1) shock absorber or strut assembly per wheel. B: Steel body, non rebuild-able, non adjustable racing shocks allowed. Inflatable shock absorbers are not allowed. C: Cars with front struts must maintain front struts. D: Front and rear shocks and struts must mount in stock location. E: A steel plate may be welded on the top side of the front strut tower for reinforcement only.
9-4 A-FRAMES/CONTROL ARMS A: All suspension parts must mount in stock location. B: Lower control arms must be stock for car but may use heavy duty ball joint. C: Lower control arm may be reinforced for safety. D: Both lower control arms must remain same length. E. No adjustable or after-market panhard bars allowed. F: No traction bars or additional linkages allowed.
9-5 SPINDLES/ WHEEL BEARINGS/ HUBS A: Spindles must be forged steel. No fabricated spindles permitted. No modifications to spindles permitted. B: All suspension parts must mount in stock location. C: Maximum camber allowed is 5 degrees (+/- ¼ degree at track)
9-6 WHEELBASE A: Original wheelbase for make and model must be retained. B: Allowable
wheelbase 90 to 103 inches. C: When measuring wheelbase one side, left or right, must be stock.
D: Maximum allowable tolerance cannot exceed plus or minus ½”.
9-7 GROUND CLEARANCE A: Frame rails and all sheet metal clearance with driver in car is 4”, subject to measurement anywhere on car. B: Ground clearance may not vary more than 2” left to right or front to rear. C: Front spoiler clearance minimum 4”. D: Minimum fuel cell height 9”.

10. STEERING
10-1: All cars will be equipped with a magnetic steel steering shaft.
10-2: Center top of steering post must be padded with at least 2” of resilient material.
10-3: A quick release metal coupling on steering wheel is mandatory.
10-4: The use of universal joints and collapsible steering section in steering shaft must be
acceptable to track officials.
10-5: Heim joints or rod ends allowed on steering components.

11. BRAKES
11-1 BRAKE COMPONENTS A: All components must be stock for the make and model of car being
competed in. Functional brakes on all four wheels will be required. B: Front disc brakes allowed only on make and model of cars that they came on from the factory. C: No disc brakes allowed on rear of the car. D: No dual master cylinders allowed. E: No inside the car brake adjusters allowed. F: No lightening of any brake parts allowed.

12. WHEELS
12-1: Only 13” steel wheels allowed. Wheels may be reinforced.
12-2: Maximum wheel width 8”
12-3: Minimum allowable backspacing 3” (Toyota may be altered to allow for max. tread width).
12-4: All track tires and wheels must be the same size and offset.
12-5: No bleeders allowed.
12-6: Maximum tread width 62½”.

13. TIRES
13-1: The only tires permitted are Hoosier 790.

14. FUEL SYSTEMS
14-1 FUEL CELL A: The use of a commercially manufactured fuel cell is mandatory B: The
maximum fuel cell capacity, including the filler spout and overflow shall be 22 gallons. C: An 8
gallon fuel cell is recommended.
14-2 FUEL CELL CONTAINER A: The use of a fuel cell container is mandatory. B: Fuel cell must
be encased in a container not less than 22 gauge steel.
14-3 FUEL CELL AND CONTAINER INSTALLATION A: Fuel cell and fuel cell container must be attached to the floor or in a recessed well. B: Fuel cell must be installed as far forward as possible, but behind rear wheels, in the trunk compartment equal distance between frame rails. C: Fuel cell installed in a recessed well must be secured with minimum (4) pieces steel tubing – (2) lengthwise/ (2) crosswise. The bottom of the fuel cell container must have a minimum ground clearance of 9 inches. E: A protective bar, minimum 1½”in diameter and .083 inch wall thickness must enter below the rear frame section behind the fuel cell. This protective bar must be as wide as the frame rails and extended as low the bottom of the fuel cell with 2 vertical uprights evenly spaced between the frame rails and attached to the rear cross member. Two support bars one located on each corner must angle upwards and be welded to the rear frame rails. F: Fire wall of steel not less than 22 gauge steel thickness must be located between trunk and driver.
14-4 FUEL PUMP A: Mechanical fuel pump must be used on engines where a fuel pump boss exists. B: Electric fuel pump may be used if no boss exists for a mechanical pump. If used, oil pressure switch for fuel pump shut off is mandatory.

15. SEATS AND SEATBELTS
15-1 SEATS A: Bucket seat with headrest is mandatory. Seat must be factory manufactured.
Seat must be aluminum a minimum of 1/8” inch thick. Lightening of the seat in any way will not be allowed. B: Seat must be properly installed and acceptable to track officials. C: Adequate padding for the seat and headrest is mandatory. See General Rules for further guidelines regarding seatbelts.

16. ROLLBARS
16-1: Round magnetic steel tubing 1¾” X .090 inch seamless roll bars are mandatory for
the roll cage and must be acceptable to track officials. Aluminum and/or other soft metals
are not permitted.
16-2: Roll bar connections must be welded.

16-3: All roll bars within the driver’s reach must be covered with an impact absorbent material
acceptable to Track Officials.

17. FIRE CONTROL

17-1: All cars must have an onboard fire extinguisher, dry powder or Halon.
17-2: Driver must be able to reach fire extinguisher or the control knob on Halon unit.
17-3: Extinguisher must be securely fastened to the roll bars or brackets, no taping allowed.
17-4: When the car is on the track, it is mandatory that the driver wear a fire resistant driving suit.
17-5: Fire resistant gloves are recommended.