*The vision for the HOBBY STOCK class is to provide an avenue for the participants to build race cars that are more technically advanced than the Cruiser Division. 

*The Hollywood Hills Speedway, Hobby Stock rules are designed to encourage a safe, competitive stock car class that allows a limited amount of modifications, while keeping in mind the economic nature of the division.

The word "STOCK" means: unaltered and as originally produced for that year, make and model... including aftermarket replacement parts.

WEIGHT LIMIT: The MINIMUM weight allowable for cars competing in the Hobby Stock class is 3,250 pounds including driver, NO TOLERANCE.

The Hollywood Hills Track scales will be the official standard.

***Ignorance of the rules is not an acceptable excuse for non-compliance***

A. BODIES:

EXTERIOR:

1.1960 or newer American make front engine, rear wheel drive passenger cars only.  NO convertible,

station wagons, pick-up or sedan allowed.

2. Bodies must be stock appearing. No flat paneling.

3. Doors must be securely welded or bolted shut.

4. Fenders may be trimmed for reasonable tire clearance only and all edges must be rolled.  Inner fenders may be removed.

5. Hood and trunk must remain stock and be securely fastened with 7/16" minimum hood pins.

6. Air cleaners may not protrude through the hood.  Only factory hood scoops are allowed and must be correct for year, make and model.

7. All glass, plastic, upholstery, rear seat, lights, mirrors and chrome must be removed.

8. OEM bumpers only.  May be reinforced with steel tubing (1 3/4" maximum od.)  Bumper ends must be attached to body using steel straps (1/8" minimum thickness) covering the end of the bumper from top to bottom, plus or minus 1".  OEM bumpers may be replaced with plastic nose and or tail pieces.

9. OEM roof with stock window posts are required. A windshield center post (1" diameter minimum) is mandatory.

10. Window openings must remain stock dimension (plus or minus 1").

11. Windshield openings must be protected with hardware cloth, expanded metal or 4 vertical bars 1/2 inch outside diameter. A screen over entire opening is recommended with extra bars in front of driver.

12. Sun Visor allowed on windshield only.

13. Cars with excessive body damage will be required to have body parts replaced or repaired to the tech committees satisfaction.

14. Car numbers and lettering  must be displayed in contrasting  colors and must be easy to read by track officials while on the racing surface.

INTERIOR:

1. The steel floor pan must remain intact for driver and front passenger compartment. Rear passengers and trunk area floor pan may be removed and covered with sheet metal, subject to tech committee approval.

2. All holes in firewall must be covered with sheet metal, 20 guage minimum.

3. Fuel lines that run through the interior must be encased in steel tubing.

B. CHASSIS:

1. Must be correct for year, make and model of body and may be reinforced, but not reconstructed, redesigned or altered beyond original factory concept.

2. Uni-Body cars must have front sub frame tied to rear frame section using steel (round or square) tubing.

3. Front and rear of frame must be equipped with tow loops of sufficient in strength to lift car and must be easily accessible for towing operations.

C. SUSPENSION:

1. Front and rear suspensions are to remain factory stock in design and location.

2. Tubular upper control arms are allowed, but must utilize factory mounts.

3. NO: coil over or bearing end shocks, spring eliminators or sliders allowed.

4. Any steel spring is allowed, but must remain in factory location.

5. Auxiliary shock is allowed on right front suspension only.

6. A nine-inch Ford rear end is optional in any chassis, but must utilize factory-mounting hardwar in stock location.

D. ROLL CAGE:

1. Main cage, door bars, halo, rear "kicker" bars, and dash bar must be minimum of 1 1/2 inch OD,.090

thickness steel tubing.

2. A 6-point roll cage with gussets at right angle welds on main cage required.

3. Driver's side door must have minimum of (4) horizontal bars, running from front upright to rear upright of cage, equally spaced from window opening to frame.  Ladder or x bracing required on all doorbars, (gussets recommended)

4. Passenger side door must have three (3) bars minimum, of parallel, X or Z design.

5. A horizontal bar must be placed between front upright bars at dash height.

6. A bar must be placed vertically from center of horizontal dash bar to front center of halo in windshield opening and must be (1) inch diameter (minimum) tubing.

7. Front hoop and additional bars to strengthen main cage recommended and are subject to tech committee approval.

8. Roll bars in vicinity of driver must have padding.

E. ENGINE:

1. General Specifications:

a. MUFFLERS are MANDATORY: Must be stock or aftermarket "turbo" style, NO modifications, glass pack mufflers allowed, MUST be welded, 2 1/2" maximum I.D. exhaust system must extend beyond driver's seat.  Any car losing a muffler will be disqualified from race.

b. Pump or racing gasoline only.  No additives allowed.

c. Electric fuel pumps must be wired through a oil pressure shut off switch.

d. Engine must be mounted with forward most sparkplug hole on centerline or forward of upper ball joints.

e. Engine must be of the same manufacture as the body and chassis.

f. Block, cylinder heads, intake and exhaust manifolds must be cast iron production parts and         standard equipment on factory produced passenger cars.

g. Stock replacement flat top or dished pistons only.

h. Block, crankshaft and connecting rods must be from the same engine type and displacement (such as 350-Chevy to 350-Chev, etc.)

i. No stroking allowed.

j. Two barrel carburetor (1) on stock 2 barrel manifold only, 500 cfm maximum.  No modifications to venturi area allowed.  A carburetor must pass track gauge.

k. Carburetor spacer/adapter allow. 1 1/2" maximum thickness

l. Any radiator may be used; must be mounted in front of engine and have a fan shroud.

m. No engine cooling systems allowed in the driver's compartment.

2. THE FOLLOWING NON STOCK/AFTER MARKET PARTS ARE ALLOWED:

a. Gauges and switches

b. Spark plugs and ignition coils and wires

c. Factory replacement HEI distributors

d. Air Cleaners

e. Valve Covers

f. Distributor cap and rotor

g. Non roller cam shaft

h. Roller timing change

i. Valve springs and retainers

j. Pushrods

k. Pushrod guide plates

l. Screw-in or pinned rocker arm studs

m. Any non-roller/non-roller tip rocker arms

n. Cam thrust buttons

3. THE FOLLOWING ITEMS ARE NOT ALLOWED:

a. Vortec or after market heads (i.e. Bowtie, Dart, SVO, etc.)

b. Roller cams or roller lifters

c. Solid valve lifters of any type

d. Fuel injection, turbochargers, superchargers or nitrous oxide

e. After market ignition systems, magnetos or computers.

f. Headers of any type

g. High-rise or performance-type intake manifolds

h. Gear drive camshafts (except production 6cyl)

i. Aluminum flywheels

j. Porting and/or polishing of intake or exhaust passage or heads

k. Off'-set ground crankshafts

l. Angle-milled heads

m. Aluminum rods

n. Aluminum or carbon fiber drive shafts

F. DRIVE TRAIN:

1. Automatic or manual shift OEM transmissions only.

2. Working torque converters are required on automatics

3. Bell housing area must be plated to protect the driver area subject to tech committee approval. 

Scatter shields or blow proof bell housings are recommended on all manual transmissions.

4. No buttons, dog clutches or quick-change devices allowed.

5. Clutch or converter minimum dia. 10"

6 .All cars must have operational forward and reverse gears.

7. With engine running, cars must demonstrate forward and reverse movement at the tech committee's request

8. Four (4) wheel operational brakes are mandatory.

9. NO brake shut off, proportioning valves allowed.

G. WHEELS:

1. Steel wheels only, 8" width maximum. Any offset allowed.

2. Right side wheels must be reinforced

3.  Aftermarket and racing wheels are allowed.

4. No bead lock wheels.

5. No wheel weights allowed.

H. TIRES:

1. D.O.T. passenger car (for highway use) tires only.

2. No racing tires or D.O.T. stamped racing manufactured tires allowed.

3. Cross grooving is allowed.

4. Maximum legal tire width is 9 1/2" at the sidewall with racing tire pressure.

5. The track tire width gauge will be the official standard measurement tool.

I. SAFETY:

1. Driver:

a. An approved full face helmet SA-95 or newer must be worn any time a car is under power and moving.

b. A minimum, SFI approved single layer fire suit, SFI approved shoes, and SFI approved gloves must

be worn. Double layer or single layer suits with "nomex" underwear are highly recommended.

c. Approved aluminum or steel racing seat only allowed.  Must be mounted to the roll cage at a minimum of 4 places (2 on back, and 2 on seat) using minimum 3/8" grade 8 bolts and large washers or steel straps.

d. A five (5) point safety harness with a minimum 3" wide webbing is mandatory and must have a single point release mechanism. Belts must be mounted with manufactures hardware to roll cage                                       or frame, using a minimum 3/8" grade 8 bolts. Belts cannot be weathered appearing.

e. A five pound fire extinguisher is mandatory in every pit area. (A 2 1/2 pound fire extinguisher optional inside driver cab area and must be securely mounted)

f. A SFI approved nylon mesh type window net must be installed in driver's window opening.  Must have accessible quick release mechanism.  Release point must be clearly marked.

2. Body/Chassis:

a. Drive shaft must be painted white and cleaned periodically.

b. A drive shaft restraint, either chain, or steel strap loop of 2" x 1/4" material must be mounted to floor pan around driveline within 4" to 12" from front u-joint.

c. Battery must completely enclosed in a steel or high impact plastic box and must be securely mounted between the left side of the seat and the driver's door.

d. A mandatory master kill switch will be mounted between the left side of the seat and the driver's door.

e. Kill switch must be accessible to the safety crew and clearly marked by a 3" arrow.

f. Any ballast shall be mounted to the roll cage or chassis using a minimum 1/2" bolts.

g. All ballast must be painted white and have car number marked on it.

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