Fastest Dirt Track in the South

Stock Four

2014 STOCK FOUR RULES

Effective 2014, Sumter Speedway’s Stock-4 Division will follow the rules of the Monster Mini Stock Association. Those rules are listed below.

Any Front Wheel Drive or Tube Chassis car will follow the 2013 Sumter Speedway Stock-4 Rules.

The Monster Mini Stock Association only allows Hoosier 400′s. Sumter Speedway will allow American Racers at the beginning of the season, but will begin to enforce the tire rule early into the season.

2014 Rules

Monster Mini Stock Assn rules for 2014

*note 2 engine combinations*
BODY -
• stock auto only
• may have complete aluminum body
• inner panel may be removed
• rear of car must be closed – no holes or flaps
• must have stock front firewall in stock location
• must have floor pan
• must have rear firewall or driver compartment must be boxed in
• aluminum doors and fenders ok but must retain stock shape and appearance
• after market nose piece ok
• must run hood
• interior spoiler can be no higher than dash
• may run a 6″ x 60″ rear spoiler – cant go over side of quarter panel – must be self supporting – spill plates ok
• made quarter panel pieces must start at bottom of bumper and go in a straight line to wheel opening
• all firewall holes must be covered
• may replace top 1/4 of firewall with steel or aluminum metal (this dont mean the whole fire wall)
• may replace dash with sheet metal – interior metal cannot be higher than dash
• may use lexan in rear side windows
CHASSIS
• must have roll cage and all safety equipment
• cage must be secured to unibody
• may tie chassis together on top of floor pan only
• square tubing from front bumper to firewall can be used
ENGINE option 1 HARRIS STOCK 4TYPE WEIGHT LB PER CC 2000LB MINIMUM
BOTTOM
• stock engine location – no set backs
• no engines with more than 2 valves per cytlinder
• cc must be based on original bore of block
• formula for cc – bore x bore x .7854 x stroke x 4 = cid then divide cid into .061 (5 cc’s for wear allowed)
• no rotery or turbo or double OHC permitted
• OEM only .080 over max bore – not to exceed 2500 cc
• aluminum cam gear or pulley allowed
• any steel rod – no aluminum or titanium
• stock crank with stock stroke
• can not be lightened (Lightened crank add EXTRA 50 lbs in front of fire wall)
• oil pan – any wet
• no dry sumps allowed
• any flat top piston – toyota 1600 and 1800 may run dome of .235 tall only

.267 dome pistons must add 50 lbs
HEADS
• OEM may be changed from one size engine to another
• may have competition valve job with any angle or depth
• must not touch bottom of valve boss
• all angles must be concentric with valve guide
• any steel valve stock diameter may be undercut stem
• double valve springs ok but must be steel
• any steel or retainer
• lifter has to be stock diameter – solid ok
• no porting or polishing
INTAKES
• OEM only

• no porting or polishing
• may bore straight down for clearance – no radius or blending
• no fuel injection manifolds except for chevrolet and any other engine that only came with
fuel injection
• may modify for carburetor but must be approved before race

CARBURETOR
• stock carburetor or holley 350 CFM (#7448 or 0-80787-1)or 500 cfm #4412
• must have airhorn with number
• may cut end of screws
• no thinning of shafts
• no polishing or grinding
• spacer and adapter – any 1″ max thick together – NO TOLERANCE
• 2 gaskets @ .070 thick max each
CAM
• solid or hydraulic
• maximum .425 lift at valve with .025 lash at valve for solid
• maximum .455 lift at valve with 0 lash at valve for hydraulic
• no swapping of any lobes – must be in stock order
FLYWHEEL AND CLUTCH ASSEMBLY
• stock flywheel must weigh 16 lbs.
• must have stock or stock replacement clutch and pressure plate
• stud for pressure plate ok
• cannot relocate bolt hole pattern
• no scallop flywheels
TRANSMISSIONS
• must be stock with working forward and reverse gears
• must have safety loop
• cannot remove or lighten of gears
DRIVE SHAFT
• minimum of 1 1/2″ diameter
• any steel
• must be painted white with number on it
***Engine option #2 Ga rules cars 2300 FORD ONLY*** 2250LBS
Bottom end:
1.STOCK CRANK NO LIGHTNING
2..060 BORE PERMITTED
3.5.2 ROD ONLY CAN BE AFTERMARKET STEEL
4.MAY USE RACING OIL PAN
5.NO DRY SUMP
6.MAYBE BALANCED
Heads:
A. Must be stock for make and model.
B. Stock- 1 piece stock replacement valve permitted (can be single lock groove). Double valve springs permitted.
C. Stock, one piece stock replacement valve permitted.NO TAPPER VALVE STEMS Double valve springs permitted.
D. Any Hyd. (.455 lift) cam permitted.CHECKED WITH SOLID LIFTER AT 0 LASH
E. Cam gear permitted.
F. Stock cast iron manifold or header permitted.
G. Shims under lifter permitted.
H. No Porting & Polishing permitted
Intake Manifold:
A. Stock intake and stock fuel injected (with adapter) permitted. No sidewinder intake permitted. *** NOTE EFI INTAKE ONLY USED WITH GA RULES**
B.No sidewinder intake permitted.
C. No porting or polishing permitted
Carburetor:
A. 1″ spacer or adapter permitted.
B. 350 (#7448) and 500(#4412) carb. No polishing and porting.

 

Heads:
A. Must be stock for make and model.
B. Stock- 1 piece stock replacement valve permitted (can be single lock groove). Double valve springs permitted.
C. Stock, one piece stock replacement valve permitted. Double valve springs permitted.
D. Hyd. (.455 lift) cam permitted.NO ROLLERS
E. Cam gear permitted.
F. Shims under lifter permitted.
G.No Porting & Polishing permitted
REAR ENDS
• any stock up to 8.8 for make of car
• no gun drilled axles
• no full spools
• housing cannot be modified for gear clearance
• may lock rearends
• no lightening of any gears

Cut gears must add 25lbs
SUSPENSION
• must be stock suspension
• lowering blocks ok
• adjustable buckets ok springs must be in stock location (Buckets may be raised for spring travel but keep stock angle.)

• may run spring buckets
• caster and camber plates ok
• stock body shocks only
• may adjust shocks for travel but cannot change the angle of the shock
• may change pinion angle
• after market bushing in a-frames and trailing arms ok but may not swivel
• bushings or offset bushings ok in steering rack

mono balls allowed
** JACK BOLTS PERMITTED**

 

** $125 buy rule on shocks**

**$250 Claimer Rule on Struts**
Headers: Spec Schoenfeild fords #f-234v or #f-235v Toyotas #t168 OR STK MANIFOLD
THESE SPEC HEADERS ARE THE ONLY HEADERS LEGAL WITH HARRIS ENGINE TYPE RULES
HYD HEAD GA TYPE ENGINES CAN USE USE ANY MANUFACTORS HEADER BUT NO CUSTOM BUILT OR ** NO** TRI Y HEADERS ALLOWED
$200 CLAIM RULE ON ANY Ga car not running a spec HEADER
HEADER MUST BE APPROVED

 

Ignition: Stock or Mels Ignition ONLY 

No Boosters on ignition
WHEELS & TIRES
1.WHEELS 8′BEADLOCKS OK
2.HOOSIER 400s

3. NO Chemicals Allowed

 

Brakes

1. 3 wheel brake shut off permitted

2. Dual master Cylinder permitted with NO adjuster

3. Stock rotors NO MODIFICATIONS

4. Factory 4 wheel Disc brakes permitted
NOTES:
1.NO FWD OR MID ENGINE CARS
2.REAR BUMPERS MUST *NOT* EXTEND PASSED THE INSIDE OF REAR TIRES *UNLESS* IT HAS A BUMPER COVER

3. VP Fuel 110 or 114

4. Radiator Must Remain In Front Of Motor

 

 

Front Wheel Drive Cars will follow these rules:

Only the modification of items listed in this section may be changed. All others must remain stock. Any alteration not approved by track officals will be considered illegal. All competitors will be required to have in their possession at the track an official manual describing make, year and model of body being used plus stated wheelbase from the factory. Engine specifications are as follows: Cam design, valve sizes, cubic centimeters or cubic inches, bore size and stroke of engine used.

Should a competitor not produce an offical manual to prove legality in the case of a protest, the car will be declared illegal at the discretion of the tech offical(s).

Open to all American and Foreign made 4 cylinder sedan cars and pick-up trucks having factory wheelbase minimum of 90 inches. Sports cars, convertibles or special production high performance vehicles are NOT PERMITED.  No all-wheel steering cars allowed.

 

BODY:

1) All body and body parts must be neat in appearance. Cars with missing or heavily damaged parts will not be able to compete until properly repaired.

2) Stock bodies, aftermarket and homemade bodies allowed.  Must have either stock or aftermarket front nose covers.  Must have a rear bumper. Rear of car or truck must be closed.Aluminum panels allowed.

3) All glass, lights, burnable material and exterior trim must be removed. Tailgates must be on trucks and must be securely fastened in closed position. Tailgate must be equal to bed sides in height. Fabricated bed sides must be a minimum of 15 inches above top of frame rails.

4) No tilting of tailgates. Bed covers allowed. May be covered with aluminum.

5) Maximum spoiler height 5 inches of upright material, lenght may not extend past body sides. 2 spoiler ends allowed. Maximum height 6 inches, maximum overall lenght 12 inches.

6) Wheel openings may be cut for tire clearence. Inner fenders may be removed.

7) Stock hoods and trunks may be altered to fit aftermarket nose pieces.

8) Dash is optional. Boxed interior allowed.

9) Floorboards – front and behind seat must be complete from side to side of body and sealed. Floor panels that are rusted out or damaged beyond repair may be replaced with a a minimum of 20 gauge steel. No Aluminum! Floorboard must remain in manufacturer’s original position. Car cannot be tunneled. Floorboard on right side of driver may be notched to raise exhaust pipe above floor pan, but must be completly covered for safety reasons.

10) Firewall must be stock and in original location. Firewall must be complete and from side to sideand must seal driver compartment from engine compartment. Rear firewall must seal fuel cell and battery from driver compartment. Rear firewall may be constucted of Aluminum with a minimum thickness of .040″. Fuel cells are MANDATORY and mounted securely.

11) Hook up chains MANDATORY front and rear outside of bumper covers.

12) Lexan front visor maximum of 6 inches from top of windshield opening allowed.

13) Lexan door glass permitted, but not to exceed 16 inches in length at bottom door edge.

14) All cars must have a minimum of 3 bars mounted in front of driver with a minimum thickness of 3/8″ and securely mounted. MANDATORY!

15) Ground effects and/or skirts allowed.

 

FRAME AND SUSPENSION:

1) Framework must be listed as standard production for body used. Framework must be in standard location for body used. No offsets permitted ! Support for rear unibody framework ONLY may be used to extend either over or under axle from rear of unibody to rear of car, but should in no way effect suspension joints or movement.

2) Suspension must be made of same design as originally manufactured. Suspension joints may be reinforced, but no change in location or operation.

3) Front Suspension – Solid bushings allowed. No offset bushings. Camber plates allowed.

4) Rear Suspension – Pivot points must remain stock and in stock location. NO MODIFICATIONS !

5) Control arms on straight axle rearendsmust be OEM for car used. Solid bushings allowed. No offsets bushings!

6) Independent Suspension – Lower control arms may be altered to achieve “0″ Camber on rear wheels. Plus or minus 1 degree tolerance from 0 allowed. NO MODIFICATIONS TO PIVOT POINTS ALLOWED!

7) Stock type shocks and struts ONLY! NO adjustable racing shocks or struts allowed. Shocks must be in stock location! NO MODIFICATIONS.

8) Adjustable cups allowed on front and rear. May be located on top or bottom of springs. Lowering blocks allowed on rear.

9) Cars manufactured with coil spring suspension must remain coil spring. Same for leaf spring cars.

10) No screw jacks allowed.

 

TRANSMISSION AND DRIVELINE: 

1) Differential and/or housing must match manufacture of car used.

2) Transmission must be OEM for car used. Gear boxes must have all forward and reverse gears in working order.

3) Transmission and rearend: any ratio.

4) Rearend may be locked. Spools allowed.

5) Driveshaft must have safety loop. Drive shaft must be painted white.

6) Flywheel, clutch disc, pressure plate and bolts must weigh 1.25 pounds per 100 cc’s. Release bearing will not be weighed. No aluminum or trick type flywheel or pressure plate allowed. No drilling of flywheel. Single full clutch disc only. Flywheel and pressure plate bolt pattern must match.

 

ENGINES:

1) Dual overhead cams allowed.

2) Engine must be standard production, 4 cylinder from manufacturer of car / truck being used. No crossing of manufacturer lines. No special, limited production or high performance engine or parts may be used, except where allowed in rules. No rotary engines allowed!

3) Head must match block used. 3 angle valve job allowed. No cutting below seat area. No enshrouding in combustion chamber. Stock replacement stainless steel valves permitted. Flat milling allowed. Screw in studs allowed.

4) All engines must be in stock location.

5) Stroke must match block used, .011 inch tolerance.

6) Bore and stroke must agree as manufacturer of engine intended. Maximum overbore .060 inches with .015 allowance for wear.

7) Reduction pulley on crankshaft allowed.

8) Camshafts – Solid or hydraulic. Stock rocker arms for engine used. No roller cam shafts allowed.

9) Degree pulleys allowed.

10) Valve size must be standard for engine, plus .009 inches tolerance.

11) Standard production cylinder head. Head must match block used. Hydraulic heads may be converted to solid.

12) No porting or polishing allowed. No gasket matching.

13) Intake must be stock for engine used. No modifications. Adapter and gasket maximum thickness 1.25 inches, No tolerance.

14) Any steel rods.

15) Crankshaft: stock only. No aftermarket. May be balanced, stock stroke only. No lightening, no knife edging. Rods: any steel. No titanium. May be reworked.

16) Pistons – Any flat top, No cutting, milling or modifying pistons allowed.

17) Any fan or radiator.

18) Headers allowed.

19) Single 2 barrel carburetor only. Motorcraft, Rochester or STOCK replacement Weber allowed. Holley 350 cfm w/ air horn and list number.

20) Fuel Injection systems – Factory fuel injection for car / engine used. Must remain STOCK. Aftermarket Injectors allowed. No adjustable fuel pressure regulators.

21) No super charger, turbo charger, nitrous or boost device permitted.

22) One ( 1 ) fuel pump only. No fuel lines in drivers compartment. Electric pumps must be wired through oil pressure switch.

23) Gasoline for fuel only.

24) Stock Ignition. No modifications allowed. May lock advance mechanism.

 

BRAKES:

1) Car must have all four wheel brakes in good working order at all times. No adjustable valves or pedals, stock or otherwise. No line restricting device or any other aftermarket parts will be allowed. Four wheel factory disc allowed.

 

WEIGHT:

1) Minimum weight is 2200lbs for any car. This is a trail basis and may be changed at any time if determined necessary by track officials.  

2) Track reserves the right to add weight or restrictor plates to any car to keep class competitive. Weight placement determined by track.

3) Tube chassis cars must weigh 2500lbs.

 

TIRES AND WHEELS: 

1) Steel wheels only. Maximum wheel width 8 inches. Any offset. Large studs recommended.

2) Wheel spacers allowed. Maximum thickness 1/2 inch. One per wheel.

3) Any 8″ wide racing tire or any 8″ wide DOT approved street tire.

4) Grooving permitted, but not to be grooved at track!

5) No treating or prepping tires at track.

THERE ARE TO BE NO TIRES LEFT AT THE TRACK UNDER ANY CIRCUMSTANCES.