Hialeah Speedway Street Stock Rules 2005
Interpretation of all rules is left to the discretion of the Miami Speedway as to the spirit and intent of the rules herein. If it doesn’t say to do it, the absence of a specific rule does not imply consent, approval or permission regarding the subject. If you don’t read about it, don’t touch it or change it in any way or you will be illegal. Definition of STOCK means no modifications to factory parts or factory specifications. Any questions or doubts regarding such matters should be directed to an Miami Speedway official. The Miami Speedway Management will make any further definitions and interpretations of these rules. Effective date January 1, 2004.
Eligible Car Models
Any Hialeah Speedway approved coupe or sedan from 1970 to present. All GM cars must be full perimeter frame type. F bodies (Camaro or Firebird) allowed. Mustangs allowed but must be 108” wheelbase. Approved Chrysler vehicle must be uni-body style cars.
Wheelbase
Minimum factory wheelbase 108” all makes and models.
Body
1) Rear of body may be gutted starting from the back of driver’s seat rearward.
2) Front and rear wheel wells may be cut for clearance. Inner front fender walls may be removed.
3) Hood and trunk lids may be gutted. Fiberglass hoods of stock contour are optional. Hood scoops allowed cowl type only.
4) Remove all interior upholstery and trim.
5) Doors and inner quarter panels may be gutted only when cage bars extend into panels.
6) Front fenders may be gutted.
7) Stock firewall and floor board may be boxed for header clearance only.
8) Exhaust may exit through passenger door.
9) After market body panels may be used to replace factory fenders, doors and quarter panels.
10) Roofs are builder’s option but MUST be made of stock dimensions. No chopping or sectioning.
11) After market body panels must follow stock contours. No flaring of body panels. After market bolt-on flares are optional. No welded noses.
12) All cars may use Lexan for windows (minimum 1/8” thick). Any side window must maintain a minimum 24” clear opening.
13) A steel firewall of at least .22 gauge must be installed between the fuel cell and the driver’s compartment. Driver’s compartment must be sealed from fuel system.
14) Any after market plastic front and rear covering is acceptable. Covering over front and rear bumper is MANDATORY. May use either round or square tubing for bumpers. NO square or sharp corners.
15) Minimum body and frame ground clearance is 5” measured all around.
16) Rear spoilers (tail fin) allowed. Maximum size is 5” height x 60” long.
Suspension
1) All front and rear suspension parts must be stock. NO alteration permitted. The exceptions are as follows
a) Any spring that will fit in stock unaltered spring bucket
b) Spring spacers allowed.
c) Jacking bolts allowed for rear only. Jacking bolts OPTIONAL for front.
d) All GM 108” wheelbase cars may use 73 – 77 Chevelle / Monte Carlo spindles and rotor caliper setup.
e) Top “A” frame may be tubular after market but must bolt up to stock frame mounts.
f) Upper control arm mount MUST remain in original location.
g) No modifications to lower control arms allowed.
h) Rear upper trailing arms may be slotted to correct pinion angle. NO alterations to lower trailing arms. NO track bars permitted.
i) After market neoprene or nylon bushings allowed. NO steel or solid bushings.
j) Steering tie rods and center link must remain stock.
k) Spindle arm may be bent to adjust bump steer.
l) Sway bars may be interchanged to a maximum diameter of 11/4” and may be adjustable.
m) Front suspension camber is builder’s option.
n) Stock mounted racing shocks allowed front and rear upper shock mounts, may be raised a minimum of 2” to prevent shock form bottoming out. Gas or hydraulic shocks are permitted. Outside racing shocks optional. NO adjustable shocks.
o) Shocks must be equal size
1) Front left and right
2) Rear left and right
p) NO alteration of shocks allowed.
q) Rear lower shock mounts may be moved for clearance only.
Wheels
1) Any steel wheel is allowed. Maximum wheel width is 8”. Minimum offset is 2” measured from the back of the wheel lip to the back of the wheel center. Maximum offset is 5”. Maximum of 1” spacer allowed
2) Minimum insert is 2” measured from the back of the wheel lip to the wheel center.
3) All 4 wheels must be same size 15” x 8” only.
4) Safety wheels are mandatory.
5) Minimum wheel stud size 5/8” and Grand National or truck type 5/8” studs in the right side are mandatory.
6) NO wide 5’s permitted front or rear.
Tires
1) Hialeah Speedway track approved tires only.
Engines
1) 90’ DOHV v-8 engines only. NO V-6, V-10 etc.
2) Maximum over bore shall be NO more than .030 over stock bore specs.
3) Maximum engine sizes are
A) GM Chevrolet 355 CI
B) Ford/ Mercury 356 CI
C) Dodge/ Plymouth 366CI
4) One exception 1970-1972 Chevrolet Monte Carlo may use small block 400 engines. All other GM engine rules apply to the 400 CI.
5) No high performance engines of any kind allowed.
6) Engine cases (block)
A) Must be OEM stock. NO bowtie blocks, Ford motorsport blocks etc.
7) Crankshafts
A) Must be OEM stock with stock stroke. Forged, cast iron or modular iron acceptable. NO offset grinding or stroking/ destroking.
8) Connecting rods:
A) May be after market forged or steel billet of stock length for engine type. Rod weight must be same as stock or heavier. NO lightweight steel, titanium or aluminum rods allowed.
9) Cam shafts:
A) Hydraulic flat tappet cams only. NO solid lifters or hydraulic rollers permitted.
I. Maximum lift GM/ Chevrolet .450”
II. Maximum lift Plymouth/ Dodge .515”
III. Maximum lift Ford 351 Windsor .470”
IV. Maximum lift Ford 351 Cleveland .4W
(Duration, lobe separation, etc is engine builder’s option)
10) Intake Manifolds:
A) Allowed intakes are as follows
I. Any cast iron OEM 2 or 4 barrel intake manifold for GM, Ford or Chrysler. NO performance iron intakes allowed.
11) Aluminum Intakes:
A) Any car with allowable aluminum intake must carry a 50 LB PENALTY.
B) Dual Plane intakes ONLY.
C) NO other intakes are permitted.
D) NO modifications of any kind will be allowed in or on intake, such as porting, welding, etching, etc.
12) Pistons:
A) Stock type forged or cast or hypereutectic piston only.
B) Piston styles as follows:
I. GM/ Chevrolet 4 eyebrow- flattop
II. Chrysler 318-360 no eyebrow- flattop
III. Ford 351W 4 eyebrow- flattop
IV. Ford 351C 2 eyebrow- flattop
C) Pistons cannot be modified in any way other than slight weight removal for balancing.
13) Piston Rings:
A) Builder’s option
14) Timing Chains:
A) Dual roller chain acceptable
B) NO gear drives.
15) Harmonic Dampeners:
A) OEM only
B) NO fluid dampeners
16) Oil Systems:
A) Wet sump oil system only
B) NO external oil pumps.
C) Oil pan is builder’s option.
D) Windage tray, crank scrapers, lifter valley tray, etc are acceptable.
E) Block deburring and/ or internal painting acceptable.
17) Cylinder Heads:
A) OEM factory stock cylinder heads only
B) NO aftermarket heads allowed.
C) NO aluminum heads allowed.
D) NO porting, port matching or polishing allowed.
E) Allowed modifications:
I. Screw in studs and push rod guide plates acceptable.
II. After market valve springs and retainers acceptable but must conform to OEM.
III. NO aluminum or titanium retainers. Maximum valve spring diameters as follows:
1. GM/ Chevrolet -1.250” diameter
2. Chrysler 318- 360- 1.500” diameter
3. Ford 351W- 1.44” diameter
4. Ford 351C- 1.500 diameter
IV. Stainless steel one-piece after market valve is acceptable but must be of stock head and stem diameter
V. Valve diameter as follows:
1. GM/ Chevrolet- 1.94” Int. 1.50” Exh. with 11/32” stem
2. Chrysler 318- 1.88” Int. 1.60” Exh. With 3/8” stem
3. Chrysler 360- 1.88” Int. 160” Exh. With 3/8 stem
4. Chrysler 340- 2.02” Int. 1.60” Exh. With 3/8 stem
5. Ford 351 C2- 2.05” Int. 1.65” Exh. With 11/32 stem
6. Ford 351 C4- 2.198” Int. 1.715” Exh. With 11/32 stem
7. Ford 351 W- 1.84” Int. 1.54” Exh. With 11/32 stem
8. GM/ Chevrolet- 1.94” Int. 1.50” Exh. with 11/32” stem
9. Chrysler 318- 1.88” Int. 1.60” Exh. With 3/8” stem
10. Chrysler 360- 1.88” Int. 160” Exh. With 3/8 stem
11. Chrysler 340- 2.02” Int. 1.60” Exh. With 3/8 stem
12. Ford 351 C2- 2.05” Int. 1.65” Exh. With 11/32 stem
13. Ford 351 C4- 2.198” Int. 1.715” Exh. With 11/32 stem
14. Ford 351 W- 1.84” Int. 1.54” Exh. With 11/32 stem
VI. Competition multi-angle valve jobs permitted. Engine builder’s option. Maximum valve seat back (throat) cut 75’.
VII. Cylinder head milling or angle cutting is engine builder’s option and acceptable.
VIII. Rocker arms must be of stock ratio for application. Long slot stock-type rockers are acceptable. Poly locks are also acceptable.
IX. Roller rockers maybe used but a 50LB PENALTY IS MANDATORY
X. Half roller rockers will NOT be allowed.
XI. For 2002 GM Vortec cylinder heads may be used due to the difficulty in finding older version GM castings. All the same cylinder head rules apply. These heads can only be used with aluminum Edelbrock performer intake PN 7116 and car must carry a 50LB PENALTY
18) Valve Covers:
A) Are engine builder’s option
19) Fasteners:
A) Any aftermarket engine fasteners are acceptable.
20) Ignition System:
A) Any OEM style ignition system is acceptable including point distributor, electronic distributors, HEI, etc.
B) Aftermarket ignition coils are allowed.
C) NO MSD systems, crank triggers, rev limiters, IGN retarders, etc.
D) Spark plugs, plug wires, distributor caps and internal distributor parts points, module, pick-ups are builder’s option.
E) OEM external ignition boxes for Ford and Chrysler are allowable.
21) Carburetors:
A) The only carburetor allowed is the Holley #4412 500 DFM 2 Barrel 2300 series
B) NO others will be accepted.
C) The only modifications to the carburetor allowed are as follows:
I. Linkage for throttle or trans kick down
II. Power valve
III. Jets
IV. Drilling of throttle blade for idle purposes ONLY
V. Removal of choke plate and linkage
VI. NO cutting of choke tower, polishing throttle blades or shafts
VII. Carburetor must fit track clearance gauges
1. Spacer/ adapter cannot exceed 1 1/4” in height
2. Gasket(s) cannot exceed ¼” in height
3. Total height cannot exceed 1 1/2”.
22) Engine Mounting
A) All 108” wheelbase cars must have engines mounted with the 2nd spark plug on the left side even with the top ball joint.
B) Steel motor mounts may be used in stock locations only
C) Mid mounts are optional
D) Interchanging of engines within manufacturer’s line permissible
23) Engine Accessories:
A) Engine must be self-starting
B) Hi-Torque starters acceptable, 12 volt systems only
C) Battery operated
D) Alternators optional
24) Batteries:
A) Must be mounted in front of rear wheel inside of frame rails or in engine compartment
B) Battery box maximum construction of ¼” steel
C) Accessible battery cut off switch is MANDATORY
25) Exhaust Headers:
A) Any aftermarket under car headers acceptable. Any pipe diameter allowed
B) Exhaust pipe must exit outside of car under frame
C) NO 180’ headers allowed
26) Coolant Recovery System:
A) Coolant recovery systems are MANDATORY.
B) NO coolant overflows allowed out onto racetrack
C) NO antifreeze allowed
D) Water-soluble coolant lubricants are acceptable
27) Fuel Pumps:
A) Mechanical pump only
B) Aftermarket HP pumps are acceptable
C) NO electronic pumps allowed
Drive Train
1) Transmissions:
A) Any OEM transmission manual or automatic acceptable
B) Automatics may use a transmission cooler
C) High Stall converters in automatics are optional
2) Clutches:
A) Any OEM stock or replacement stock type clutch, pressure plate and iron steel flywheel allowed
B) NO multi-disc or mini clutches
C) NO aluminum flywheels
3) Rear-ends:
A) Any OEM third member may be used
B) Any gear ration is allowed
C) Locked (spools or posi) rears are allowed
D) Aftermarket axles are allowed
E) Interchanging of rear ends is allowable (i.e. Ford 9” in GM cars) but rear ends must be set in centerline of frame used
F) NO aluminum third members permitted
G) NO floater or quick change allowed
4) Brakes:
A) OEM master cylinder is ACCEPTABLE
B) Adjustable proportioning valve for rear brakes allowed
C) Stock proportioning valves optional
D) Rear disc brakes are optional, but if used then OEM steel calipers must be used
E) NO aluminum calipers
F) Aftermarket brake pedal assembly may be used
G) Hydraulic clutch pedal assembly is optional
H) Dual brake master cylinders are optional with 25 LB PENALTY
Fuel
1) Hialeah Speedway approved fuel only
Weight
1) All vehicles must weigh minimum of 3000lbs after the race unless the penalty rules are in effect regarding intakes, rockers, etc. Punta Gorda engine rule at Miami Speedway 3150 lbs
2) These vehicles are required to carry extra weight and inform officials accordingly
3) All cars must have a maximum of 55% left side weight with driver after race NO EXCEPTIONS
4) All ballast must be bolted with at least ½” bolt and nut
5) All ballast must be painted white and display car number
6) All other weights optional
Safety
1) Fuel Cells MANDATORY
A) Fuel cells must be mounted in trunk area behind rear firewall
B) Maximum fuel capacity is 22 gallons (US)
C) Fuel cell must be 22 gauge minimum and 18 gauge maximum (sheet metal)
D) All cells must have a check valve in the vent line
E) They must be protected from sides and rear. Must have rear safety hoop
F) Steel safety straps must pass under cell from side to side; front to rear and across the top. Straps must be secured to the inside of frame rail
G) Cells must have 10” minimum ground clearance
H) Remote fuel filter is optional
I) All fuel lines must be of approved type. Regular neoprene hose is NOT acceptable
J) NO rigid fill spouts or pipes shall pass through the body
K) Fuel lines must be routed through protected area away from impact, exhaust system heat and suspension components. Lines may not be mounted in driver’s compartment
2) Roll Bars (cage)
A) Roll bars must be complete cage type with at least 4 side bars on the left (drivers ) side and 3 side bars on the right (passenger) side
B) At least 2 vertical bars must connect between all bars on the left side
C) There must be 2 bars diagonally from the top main hoop to the rear frame rails
D) All welds must have gussets
E) Main roll bar hoop must be in the front seat area of the car and must go from the left frame rail to the right frame rail
F) Bars must be welded to frame rail
G) On uni-body cars a minimum 3/16” steel plate must be installed on the floor pan before the bars are welded in place
H) Front upright bars shall not be more than 6” behind the stock windshield post
I) Left door bars must extend to the outer sheet metal of the door
J) Right door bars may be even with the frame rails on that side
K) Driver’s aluminum seat must be in front of the main roll bar hoop
L) All main cage roll bars must be a minimum of .095” wall thickness mild steel and a tubing diameter of NO less than 1 ½”
M) All drive shaft loops must be installed 12” behind transmission tail shaft
3) Steering Wheel Pads
A) MANDATORY FOR ALL DRIVERS, ALL DIVISIONS NO EXCEPTIONS
Frame
1) Uni-body cars may use frame connectors. Maximum 2” x 3” square tubing with minimum .095” wall thickness
2) Square tubing may be used only for connecting of sub frame only