Factory Stock

FACTORY STOCKS

ELIGIBILITY REQUIREMENTS AND FRAME RULES

  1. This class is open to 1965 or newer American made cars with a factory minimum wheelbase of 108 inches or an aftermarket replica of a Stock/OEM factory frame with all Stock/OEM factory suspension mounting point in place, IMCA Mod Style chassis will not be permitted.

1.1-   All frames/chassis must be approved by the track

1.2-   No four-wheel drive or front wheel drive cars.

  1. The frame may be shortened but must maintain a 107-inch wheel base measured from center of lower ball joint to center of rear end housing with car at ride height.

2.1- The frame may be cut off in front of the steering box/idler arm and replaced with tubing equal in strength.

2.2- The frame may be cut off from the center of the rear end housing back and be replaced with square or round tubing equal in strength.

  1. All suspension mounting points must remain stock except for the front upper control arm mount
  2. Engine Location must be in stock location.
  3. Must have six-point roll cage. (see cage rules)
  4. Must have a complete body and should resemble a factory body. (see body rules)
  5. The body must be mounted centered over the frame.
  6. Camaro clip cars will be allowed.

8.1 -The middle and rear frame must be made with 1.5x3x.095 tubing minimum.

8.2- Front and rear clips must be centered. (NO offset roll cage)

8.3- The leaf spring mounts must be mounted centered on the frame.

8.4 Any type of leaf spring mount bushings allowed.

8.5 The distance between the front and rear spring mounts must be the same as factory.

(Front to back and left to right)

8.6 Stock engine location measurement of 15 inches must be met.

 

FRONT SUSPENSION AND STEERING RULES
1. Front lower control arms must be oem/stock. (Screw in ball joints allowed)
a. Any type of bushings may be used. Heim joints are not permitted on any front suspension components
b. May change ball joint to any type, but must remain in stock location.
2. Front upper control arms and mounts can be changed to tubular solid mount cross-bar w/breaking or bushing(NO Hyme) style aftermarket a-arm assembly.
3. Adjustable spring cups allowed jacking bolts will not be permitted

3.1- No remote adjusters of any kind.

3.2 – Front shocks must be mounted in OEM location, front HEIM Joint shocks not permitted
4. Stock/oem sway bars front and rear will be allowed.
5. The steering gear box, Idler arm, center link, and all tie rods must be
OEM/Stock as per frame.
6. OEM/Stock spindles only GM for GM, Ford for Ford, etc… Replacement OEM (3-piece Spindles will be allowed)
7. Stock steering shaft rag joint must be removed.
8. Steering quickeners allowed.
9. Quick-release steering wheel with safety pad mandatory.

  REAR SUSPENSION
1. All upper and lower control arm mounts on the frame must be in stock location.
2. Lower rear controls arms must be OEM style, no tubular radius rods with heim joints
OEM/Stock length on both sides.
2.1- Any type of bushing may be used.
2.2- Must mount in stock hole on frame
2.3-Must maintain factory angle to rear end housing.

2.4- The lower rear control arm mounting brackets on the housing must be the same on both sides and welded to the housing in the same location and angles on both sides.

2.5- The lower rear control arm mounting brackets on the housing can have adjustable holes but no holes can be lower than 5.75 inches down from the center of the axle tube.

2.6- Where the rear lower control arm bolts to the rear lower control arm bracket must be in the          same hole on the right and left sides. (same hole side to side, up and down, and front and back)

  1. Upper rear control arms may be stock, aftermarket or homemade. Adjustable upper controls are permitted
    3.1- Must maintain OEM/Stock length + or – 1 inch.
    3.2- Must be the same length on both sides

3.3- Any type of bushing may be used (Monoball allowed).
3.4 -Must mount in stock hole on frame and maintain factory angle.

3.5- The upper rear control arm mounting brackets must remain in OEM location on the rear end housing (Single hole mount only)

  1. Adjustable spring cups and jacking bolts with or without spring buckets will be allowed on rear only

4.1- No remote adjusters of any kind.
5. Coil springs must mount on top of the axle tube in OEM location side to side(34” center to center), front to back, and up and down.

  1. No chaining of any sort.
  2. Adjustable rear upper trailing arms allowed.

 

ENGINES & LOCATION
1. Engine must remain in stock location.
a. The engine location must meet the maximum measurement of 15 inches.

(Distance of the center of lower ball joint and back of engine block cannot be greater than 15”)
2. Solid motor mounts allowed.
3. Cast iron oem/factory block only. (Maximum over bore .060)
4. No 400 cubic inch blocks allowed.
5. Cast iron OEM/Stock production straight plug heads only. (factory casting # must remain visible)
6. Any steel wet sump oil pan allowed.
7. Any steel harmonic balancer allowed.
8. No mushroom lifters. OEM or Roller Tip rockers allowed, with ratio of 1.6 or 1.5(mix matching allowed). Roller rockers are permitted
9. Any stock/oem production 2 barrel or 4-barrel intake manifold, cast iron or
aluminum will be allowed as long as it is not over 4.5 inches deep and is a dual plane intake.

(factory casting # must remain visible)

  1. JEGS intake manifolds with part number 555-513000 and Fox Votex heads part number 555-513002 will be allowed.
  2. Only one carburetor spacer/adapter can be used and cannot be over 1.25 inches thick with 2 gaskets.
    12. No remote mounted oil filters or coolers.
  3. Factory stock, Crank/rod/piston rules will follow street stock rules

 

CARBURETOR
1. Limited to one stock 4412 or 4412XP or HP holley carburetor or one OEM/Stock 2-barrel carburetor.
2. Carburetor must have choke horn but all hardware can be removed.

  1. Carburetor must pass all no-go gauge checks.
    4. No modification to pick up air from any source other than through top of carb.
    5. The following changes may be made to carb.
    a. Jets, power valves, air bleeds, emulsion bleeds, float, needle/seat, and pump cam.
    b. You may drill idle holes in butterflies.
    c. You may block off vacuum ports.
    d. You may weld linkage plate to shaft.
    e. You may install new shaft bushings.
    f. You may tighten booster.

FUEL SYSTEM
1. Gasoline only. Maximum of 32-gallon fuel cell with foam and rollover valve Mandatory.
a. Must be mounted to frame or roll cage in the trunk area.
2. All fuel lines and fittings must be suitable for racing fuel.
3. Fuel shut off valve is mandatory and mounted in reach of the driver and safety personnel. ON/OFF must be clearly marked.
4. Mechanical block mounted stock/oem style fuel pumps ONLY.
IGNITION

  1. Stock/oem style electronic ignition system only with coil in the cap.
  2. No traction control or timing altering devices allowed.
  3. No crank trigger ignitions or multi coil systems

 

HEADERS/EXHAUST
1. Headers will be allowed with a maximum tube diameter of 1 7/8 inch.
2. Cast iron exhaust manifolds will be allowed but no center dump.
3. Cross over headers is allowed but no 180-degree header allowed.
4. The exhaust underneath the car must exit behind the driver, if not under the car the exhaust must exit out of the right-side body panels
5. No crankcase evacuation type systems, two into one exhaust, or h pipes allowed.
6. Mufflers are mandatory.

 

COOLING SYSTEM

  1. No electric water pumps.
  2. Steel Fans only
  3. Any pulleys allowed.
  4. Any radiator but must remain in stock location.

 

DRIVETRAIN
1. Transmission, Any automatic or standard transmission allowed. NO direct drives (NO Bert, falcon, Brinn, etc allowed). Standard transmission must have steel bellhousing, external clutch, and all gears in working order. Minimum of a 10.5″ single disc clutch. Steel flywheel.  Automatic minimum of 11″ torque convertor. No dummy converters.

 

  1. Rear end housing, stock/oem type only. No quick-change rears.
    2.1- Ford 9-inch floater rears allowed.
    2.2- All components must be steel. (internal and External)
    2.3- Welded, locked or spools allowed.
    2.4- No ratchet type differentials or traction control devices of any kind allowed.
    2.5- Lower control arm bracket hole cannot be any lower than 5.75 inches from the center of axle tube.
    2.6- All control arm mounting points must be welded to the rear end housing
    3. Drive shafts, must be painted white.
    3.1- Cannot be smaller the 2 inches in diameter.
    3.2- Must have 2 steel safety hoops one in front, one in rear.
    3.3-No aluminum, carbon, or half shafts allowed.

WEIGHT

  1. All cars must weigh a minimum of 3000 pounds after racing with driver.

 

WHEELS AND TIRES
1. Maximum 8-inch-wide steel wheels only, No aluminum, magnesium, or carbon wheels.
2. May be any offset.
3. Bead locks are allowed.
4. 1-inch steel lug nuts mandatory with at least 1/2-inch diameter studs.
5. Five lugs per wheel.
6. D.O.T. approved passenger car tires only.

  1. No snow tires or blocked tread patterns
  2. No racing tires, Hoosier, American Racers, Towel City, and Diamond Backs ect.
  3. No Recaps.
  1. The following tire sizes will be allowed. P205/75/15—P215/75/15—P225/75/15—P235/75/15—P205/70/15—

P215/70/15—P225/70/15—P235/70/15

  1. Grooving, sipping, and grinding tires is allowed.
  2. All tires must be approved by track officials.

SHOCKS AND SPRINGS​
1. Any non-adjustable steel body shock will be allowed.
1.1- Only one shock per wheel

1.2- Rear Shocks must be mounted in stock location, heim joint steel body shocks allowed

1.3- Schrader valves are not allowed

  1. No aluminum body shocks, coil overs, sliders, and coil over eliminators allowed.
    3. Any steel, stock/oem or aftermarket racing spring will be allowed.
    a. only one spring per wheel.

    BODIES
    1. Any stock/oem, aftermarket, or homemade body will be allowed but should resemble stock.
    a. It may be constructed out of .040 or thicker aluminum.
    b. No fiberglass bodies.
    c. Bodies must be centered over frame.
    d. All glass, molding and interior components must be removed.
    e. Late model style cockpits will be allowed but must be made of 20-gauge steel
    or .080 aluminum or thicker. sidewalls and holes must be sealed.
    f. Floor boards must be made of 16-gauge steel or .120 aluminum or thicker. (1-inch maximum diameter hole for drain)
    g. Stock/oem floor boards may be used but all holes must be patched and
    firewalls sealed off from drivers’ compartment.
    h. No sharp edges or you will not be allowed to compete.

ROLL CAGE RULES
1. A complete six-point cage is mandatory.
a. All six mounting points must be welded to factory frame, or an added frame rail that is equal in strength.
b. 1.5-inch diameter and .095 wall thickness tubing will be the minimum allowed.
c. The track reserves the right to drill a test hole at any time.
d. Cage must have 3 door bars on each side.
e. Driver’s side door bars must have a minimum of 2 vertical bars tying them together and to the frame rail.
f. The cage must have 2 cross bars one below and one above the windshield opening. (side to side)
g. The cage must have 1 one-inch vertical bar down center of windshield area.
h. The cage must have 2 rear cross bars (side to side). The top one must be 2 inches above drivers’ head and the one in the middle should be at top door bar height.
I. The cage must have three roof bars (front to rear) one on each side and one in the middle area. These bars must clear drivers head and leave room to extract driver thru roof.
j. The cage must have 2 rear down posts from the top rear cross bar down to the rear frame rails.
k. Any roll cage the track determine as unsafe will not be allowed to compete

BUMPERS AND NERF BARS
1. All bumpers and bumper support bars must be securely bolted or welded to   frame.
2. All bumpers end must be capped, turned in, and have NO SHARP EDGES.
3. No cowcatcher or severely over built bumpers will be allowed.

  1. All cars must have TOW HOOKS on front and rear of car, easily accessible
    by tow truck operators without removing hoods.
    5. Nerf bar is optional between front and rear wheels and from rear wheel to   back bumper.
    a. Must be no bigger than 1.5 inches in diameter.
    b. Can only be one pipe.
    c. Cannot stick out no more than 1.5 inches’ past tire side wall.
    d. All edges must be capped and turned in with no sharp edges.
    ANY CAR WITH UNCAPPED OR SHARP EDGES ON NERFS AND/OR BUMPERS WILL NOT BE ALLOWED TO COMPETE

 

BRAKES
1. Must have 4-wheel brakes operable from drivers’ seat.
2. Stock/oem style single piston calipers only. No aluminum
3. 4-wheel disc brakes allowed
4. Dual master cylinder with balance bars and remote adjusters are allowed.
5. Right front brake shut off allowed but must be in reach of driver.

  1. No aluminum rotors

SEAT/INTERIOR
1. An Aluminum seat is mandatory, minimum .095 thick.
a. Seat must be a high back.
b. Seat must be bolted in with a minimum of six 3/8-inch diameter bolts.
(4 in bottom and 2 in back)
c. Seat must be bolted to frame or roll cage.
2. Car must have a 5-point racing seat belt harness and mounted properly.
a. Harness must be bolted to frame of roll cage with at least 3/8-inch diameter
bolts
3. All bars in drivers contact area must be covered with roll bar padding (no pipe insulation).
4. Window net is mandatory and the driver must be able to open it from the seat.
5. All pedals must be in stock location in drivers’ compartment. (no hand clutch etc.)

  1. No Cable operated throttles allowed.
    7. Gas pedal must have TOE LIFT LOOP.
    8. Driver must be protected by a sealed front and rear firewalls and both
    sidewalls made with a minimum of 20-gauge steel or .080 aluminum.
    9. Cockpit floor must be made from 16-gauge steel or .120 aluminum or thicker. (1-inch maximum diameter hole for drain)
    10. The ignition switch must be clearly marked on/off.
    11. A master kill switch is mandatory and should be placed where the driver and
    safety personnel can reach it. Must be clearly marked on/off.
    12. A fuel shut off is mandatory and should be placed where the driver and
    safety personnel can reach it. Must be clearly marked on/off
    13. The battery cannot be mounted in drivers’ compartment.

 

ROOF
1. Any stock/oem, aftermarket, or homemade roof will be allowed but must be
approved by track.
a. It may be constructed out of steel, fiberglass, or .080 aluminum minimum.
b. No half roofs or roof spoilers.
c. Must be centered over body

HOOD

  1. Any Stock/OEM, aftermarket, or homemade hood will be allowed but must be approved by track.
  2. It may be constructed out of steel, fiberglass, or aluminum at least .040 thick.
  3. Hood scoops will be allowed. Maximum 3-inches tall and 21-inches wide.

FENDERS, DOORS, QUARTER PANELS, AND TRUNK LID
1. Any stock/oem, aftermarket, or homemade fenders, doors, quarter panels, and trunk lid will be allowed but must be approved by track.
a. They may be constructed out of steel or aluminum at least .040 thick.
b. Should resemble factory.

UPPER QUARTER PANELS
1. Any stock/oem, aftermarket, or homemade upper quarter panels will be allowed
but must be approved by track.
a. It may be constructed out of steel or aluminum at least .040 thick.
b. Panels Must not be oversize. NO SAIL PANELS

NOSE PIECE
1. Must have nose piece. It may be stock/oem or aftermarket replica.
a. No fiberglass.
b. Must fit body correctly.
c. No late model type flares.

 

REAR PANEL
1. Aftermarket tail piece recommended.
a. It may be constructed out of steel or aluminum at least .040 thick.
b. Must be a minimum of 8 inches tall.
c. Car number must be displayed on rear panel. (6-inch number minimum)

REAR SPOILER
1. Spoiler may be made of Lexan or aluminum at least .040 thick.
a. Maximum height is 6 inches.
b. Must not be adjustable.
c. Spoiler sides mat not exceed 6 inches in height or 20 inches in length and
must not extend beyond the main spoiler.
ALL BODIES MUST BE APPROVED BY THE TRACK