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Mini Stock

HUNTSVILLE SPEEDWAY MINI STOCK RULES 2016

RULE BOOK DISCLAIMER

The rules and/or regulations set forth herein are designed to provide

for the orderly conduct of racing events and to establish minimum

acceptable requirements for such events. These rules shall govern the

condition of all events, and by participating in these events, all

participants are deemed to have complied with these rules. NO

EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM

PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND OR

REGULATIONS. They are intended as a guide for the conduct of the

sport and are in no way a guarantee against injury or death to a

participant, spectator or official.

The race director shall be empowered to permit reasonable and

appropriate deviation from any of the specifications herein or impose

any further restrictions that in his/her opinion do not alter the

minimum acceptable requirements. NO EXPRESSED OR IMPLIED

WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF

SPECIFICATIONS. Any interpretation of deviation of these rules is left

to discretion of the officials. Their decision is final.

The Management of Huntsville Speedway

Safety Rules

1. Apparel- Also See General Rules.

All safety apparel must be worn while on the racing surface. This will

be enforced for practice and race dates.

2.  Driver must wear eye protection under race conditions. (ie goggles

or face shield)

3.  Neck brace is recommend.

4.  Must have functional quick release steering wheel.

5.  Car must pass a safety inspection by Huntsville Speedway and

maintain throughout the season.

All safety apparel must be worn while on the racing surface. This will

be enforced for practice and race dates.

General rules apply.

Technical Rules

1. The word stock as referred to in the following rules mean “As it

comes from the factory in non hi-performance mass produced

automobiles”.

2. Top 3 finishers after the race will go immediately to tech.  Fourth

and Fifth place go to holding area until top three have been released

from inspection.

3.  All starts will be double file, cone rule may apply on restarts.

4.  The first place finisher of the previous event will start no better

than 6th place the next race he or she competes in regardless of the

qualifying order.

3. Radios highly recommended.

Tires

1. Tires will be American Racer DOT tires.

2. 13”, 14”, 15” tall 8″ wide steel wheels only.  Wheel offset to be

within 1″ left to right.

3.  No wheel adaptions.

4.  Must have 1” lug nuts.

5.  No wheel weights.

6.  No air bleeders or pop-offs.

Roll cage

1. Bars must be at least .095 gauge 1 ¾” OD steel pipe.

2. Bars must be welded to frame and have 4 protective bars on

driver’s side and 3 protective bars on passenger side. No square

tubing.

3. All cages must meet approval of HS Officials.

Engine

1. Stock location (engine face must line up or must be in line with

center of upper ball joints) with a 1 inch tolerance. If engine is setback

further than the rule states you must put 50 lbs. in front of the front

spindles. Weight must be centered or right of center. This is not an

extra 50 pounds. Engine must be centered in frame, +/- 1″.

Ignition

1. One 12-volt battery only.

2. Electronic ignition permitted. MSD type boxes permitted.

3. No coil packs or crank trigger fired ignitions.

4. Must have emergency cut-off switch within drivers reach and highly

visible to safety crew.

Carburetor

1. Only a Holley 2300 series 350cfm 2bl. carburetor #7448 is allowed.

Must fit HS gauges and air horn cannot be removed. Unaltered

boosters in stock location. Butterfly screws are optional, Stock shaft

and butterflies. Choke rod hole may be plugged and choke mount

holes sealed with epoxy or comparable material.

2. Spacer/adapter maximum 2″ including gaskets.

3. May use air box.

4. No Fuel injected engines.

Head

1. Stock production head only. No aftermarket of any kind. No porting,

polishing or grinding of any kind. Damaged heads may be resurfaced.

Cylinder head boss may be cut down for short adjusters 2300. May

have 3-angle valve job. No more than 75 degrees. Valve spring pocket

may be cut .0100 deep or may run long valves; stock head/valve

diameter, stainless steel valves allowed. May run 2.0 head with 2.3

valves, but must carry 2.3 weight for engine.

2. No aluminum heads except stock Toyota.

3. No more than 2 valves per cylinder. Unless approved by HS officials.

4. Any size cam. No roller cams. May run adjustable cam gear.

Pistons

1. Any 3 ring flat top piston. Toyota may run dome pistons.

Crank

1. Stock crank for motor used, may be balanced. No grinding,

polishing or lightening of any kind.

NO STROKERS, Engine must be zero deck height, piston may not

extend above block at TDC. (exc. Toyota)

Rods

1. Any steel rod permitted. Stock length +/- .050

Clutch/ Pressure plate

1. Stock diameter clutch and pressure plate. No aluminum parts.

2. May run solid center disc.

Intake

1.  Stock or aftermarket intake allowed.  On stock intake only, port

matching only the head side of intake allowed.

Flywheel

1. Must be stock diameter- 12 lbs. minimum, flywheel bolts included.

2. All to be weighed on HS scales if questioned.

3.NO Aluminum flywheels.

Weight

1. OEM chassis with steel body (this can be tubed from center of rear

axle back, with no left side penalty):

Must meet total weight requirements, no left side weight restrictions

Up to 2.0 1900 lbs.

Over 2.0 2000 lbs.

2. Stock Front Clip and/or Stock Chassis with aftermarket body:

Up to 2.0 2050 lbs. 56% Left Side

Over 2.0 2150 lbs. 56% Left Side

3. Full Tube Frame

Up to 2.0 2250 lbs. 56% Left Side

Over 2.0 2300 lbs. 56% Left Side

4. All Toyota’s w/OEM chassis Up to 1.8L – 2000 lbs., over 1.8L – 2050

lbs with No Left Side rule. Tube chassis 2150 lb. 55% Left side.

Speedway reserves the right to amend this rule as necessary.

5. Weight determined by original engine size. Boring .040 over

included in weight. I.E. 2.0 bored .040 over is still classified as a 2.0.

6. All ballast must be attached with two ½” bolts and be white with car

number on it.

7. No car over 2500 lbs. will be allowed to compete in the event for

safety reasons.

8. 2.5 STOCK truck engine permitted min. weight 2400lbs.

{max.2550cc}

9.  All weights are before qualifying and after the race.

10.  No fuel burnoff allowance.

Body

1. Steel, aluminum, or fiberglass body. 2. Must have 4″ ground

clearance, body and frame included, with driver and safety equipment,

before and after the race.

3. Full Front windshield required, must be 1/8” Lexan/Polycarbonate.

No plexiglass.  Must allow 5” at op of windshield for division sponsor

sticker.

4. Rear window permitted.

5. Rear body panel must cover rear of car to bumper.

6. Tread Width 64″ measured from true center of tires at spindle

height. Zero tolerance.

Spoilers

1. Maximum 6″ height. May not exceed width of deck.

Chassis

1. All components must remain stock, as produced by manufacturer

and mounted in stock location, unless specified. Front and rear sub

frames may be connected with tubular framing. One piece per side.

Location optional. May “X” frames or add cross members. May replace

crash damage with tubing, maintain stock dimensions and flow.

2. Stock type sway bars are allowed. No spline bars.

Shocks

1. Any steel body non-adjustable shock allowed.

2.  No aluminum shocks. No Schrader valve shocks.

3. Bump stops allowed.

4.  No claim rule on shocks!!

Springs

1. Any coil spring may be used except coil binding springs.  (front

minimum 3 1/2″ rear minimum 2″)

2. Wedge bolt adjusters allowed.

3. Stock main leaf for car. Number of leafs optional. May use clamps.

May cut secondary leaf. Sliders permitted with wedge bolt adjusters.

4. Strut cars may use tech approved coil-over adjusters on front only.

5. May elongate slots for caster/camber adjustments.

Steering

1. Steering box and components must be stock and in stock location.

2. Adjustable racks & pinions allowed.

Brakes

1. May run disc brakes. No aftermarket brake parts: calipers, rotors or

drums.

2. No drilled rotors. Any pedal or master cylinder set up.

3. All wheels must have four working brakes.

Rear-end

1. Any stock passenger car rear-end must remain in stock location,

centered in car. No offset. May be locked. No quick change. No

cambered rear-ends. No gold tracks. No aluminum spools.

Drive shaft

1. Driveshaft must be Steel. NO Aluminum driveshafts! No aluminum

parts of any kind in the driveline.

2. Must have drive shaft loop. Driveshaft must be painted white.

Transmission

1. Manual or automatic (Must have working torque converter

included).

2. All transmissions must be stock OEM and unmodified. Must be in

working condition with reverse and all forward gears.

3.  1 inch inspection hole in bellhousing recommended for tech

officials.

Fuel/ Fuel Cell

1. Fuel cell is mandatory, 12 gal. maximum with foam, must have

check valve.

2. 9″ ground clearance.

3. Must have rear protection bar minimum 1 ¼” .095″ bar, 2 straps

minimum 1″ width surrounding the entire fuel cell. Fuel cells must be

bolted. No rivets and no sheet metal screws.

4. Location of fuel cells must be approved by HS tech inspectors.

5. HS fuel only. No additive.

6. Fuel must go through the fuel cell to the carburetor and cannot pass

through any performance enhancing/cooling devices.

7. Electric fuel pumps permitted.

Abide by all general rules!!

WEIGHT MAY BE ADDED TO ANY CAR AT ANY EVENT AND ADDED IN

ANY LOCATION ON CAR IF DEEMED NECESSARY BY HS OFFICIALS.

 

 

Leave comments on your thoughts on the rules. Negative comments will be deleted.

 

Comments (3)

  1. Joe Davis

    Leave it the way it is

  2. Louie Robinett

    Any changes to the ministock rules should hopefully be minimal, mostly weights and percentages. No decision on tires yet.

  3. Joe Davis

    OK thanks Louie that gives us a place to start

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