|
2008 Tazewell Speedway Modified Street Rules
Eligible
Models
Any factory U.S. production models made in 1965 or after.
No trucks, station wagons or convertibles. Minimum wheel base
for any car is 107 inches. The car must be full stock frame.
Tube frames will NOT be allowed. The following are the only
changes permitted, everything else must remain stock.
Bodies
Steel aftermarket stock appearing bodies allowed. Roof may be
fiberglass and hood may be aluminum. Must retain stock fire
wall and floor pan in stock location. Floor pan must extend to
the rear seat area. Floor pan can be reinforced with steel
plate. Plastic nose and tail permitted. Tail piece is
required. May be enclosed with sheet medal. A five inch tall
spoiler is allowed. No side braces allowed. All glass, head
lights, exterior lights and trim must be removed. Front and
rear wheel openings may be trimmed for tire clearance. No
sharp edges. Steel tube front and rear bumpers may replace
stock bumpers. Front bumper may be made of maximum 1 ½ o.d. x
.125 thickness or 1 ¾ o.d. x .095 thickness tubing. Rear may
be a maximum of 2 x 3 o.d. x .125 thickness rectangular
tubing.
All body parts must be inplace to start the race. Track
discretion if you're involved in a accident.
Roll
Cage
ALL CARS MUST HAVE A SIX (6) POINT ROLL CAGE. Roll bar
material must be minimum 1 ½ inch o.d. tubing by .095
thickness. It is recommended that welded joints have a gusset
of minimum 1/8" thick steel. No conduit, thin-wall tubing or
cast-iron pipe fittings will be permitted. All roll bar
installations are subject to approval by the Technical
Inspector. Door bars are mandatory and must extend into the
door panels. A minimum of three door bars with six vertical
studs equally spaced are required on the drivers side. Right
side X is permitted. All bars within reasonable reach of the
driver must be padded. Side wing bars are mandatory on both
sides of the roll cage, and must extend downward at 90E
degrees from the apex of upper forward roll bar bend, to top
of the side door bar. The side wing bars must be the same
material as Roll Cage. (minimum 1½ x .095). Uni body cars may
tie the front clip to the rear clip. The rear-clip may be
reinforced with round or box steel tubing (2" x 3"
recommended). One or more bars are required from left front
upright of roll cage to the frame for foot protection.
Weight
Requirements
Car must weigh 3,000 pounds (with driver) before qualifying
and before the race. Any car not meeting the minimum weight
requirement prior to qualifying will not qualify. Any car that
fails the weight requirement before the race will add the
weight and start in the rear. All weight added to the car must
be securely mounted with a minimum of two 3/8 grade 8 bolts.
It must be painted white and the car number must be visible.
Any weight dropped on the racing surface will result in
immediate disqualification.
Engine
Restrictions
Engine must be stock production. Engines may be interchanged
within corporate manufacturer lines (i.e. any GM motor into
any GM car) Maximum cubic inch for any GM engine is 360, Ford
360, Chrysler 370. No V-6 engines allowed.
Engine
Block
O.E.M. cast iron, may be 2 or 4 bolt main. Aftermarket main
caps allowed. Engine must remain in stock location, 1 inch
tolerance.
Cylinder
Heads
O.E.M. stock cast iron GM or World Products Part numbers 4265,
4266, and 4267 only. No aluminum heads permitted. Maximum
valve size for GM 2.02/1.60, Ford 2.04/1.65, Chrysler
2.02/1.62. No angle plug heads allowed. Vortec cast iron heads
are allowed. No porting, polishing, gasket matching or
grinding allowed. May be angle milled. Three angle valve job
permitted. Stainless steel valves permitted.
Crankshaft
Stock or aftermarket crankshafts allowed, must be of stock
stroke and weight. (i.e. GM 350 = 3.480 stroke), cast 48 lbs.,
steel 50 lbs. May be balanced.
Connecting Rods
Stock or any aftermarket steel rods permitted. No aluminum or
titanium rods allowed.
Pistons
Cast or forged, flat top pistons only. Zero deck (piston can
not come out of the hole). No tolerance.
Timing
Components
Any high performance camshaft allowed, except no roller or
mushroom camshafts. Stock type solid or stock type hydraulic
lifters only. No roller or mushroom lifters permitted. Dual
roller timing chain or gear drive permitted.
Rocker
Arms
Stock, long slot or roller rockers allowed. Rocker arm studs
may be pinned or screw in studs. Guide plates, poly locks and
stud girdles allowed. Shaft mounted rockers not permitted.
Valve springs and retainers optional.
Oil
Pump/Pan/Valve Covers
Stock or aftermarket permitted. Wet sump only.
Intake
Manifold
Cast iron or aluminum intakes only. All intake manifolds must
be untouched, as originally manufactured by the factory. Any
manifold that is determined to be modified will be subject to
disqualification. No homemade intake manifolds allowed.
Exhaust
Headers allowed. No turn downs. Must run parallel to the
ground, may run side to side.
Carburetor
750 CFM maximum. Single pump, dual line, vacuum secondary
carburetor only. Choke may be removed, but choke horn must
remain. Two inch maximum adapter plate permitted. No
alterations to venturi. Mechanical throttle linkage must have
toe strap. A minimum of two return springs required on
carburetor.
Fuel And
Fuel Cell
Pump and racing fuel allowed (no additives). No Methanol,
alcohol or nitrous oxide allowed. A fuel cell is required. The
pick up must be located on the top of the fuel cell. Maximum
capacity cannot exceed 22 gallons. Fuel cells must be
contained in a completely enclosed 18 gauge steel container.
No aluminum fuel cells are allowed. All fuel cells must be
vented and have a screw type cap. Must have coiled tube to
prevent leaking of fuel in the event of a roll over. Vent
check valves are optional but the loop is mandatory. Cell may
not hang lower than the rear end housing and must have a cell
guard minimum 1 1/2" tube to bottom of cell. Gas cap may not
extend thru body. When plumbing any fuel related item, DO NOT
USE PLUMBERS TAPE. Fuel pump must be mechanical, mounted in
stock location. No electric fuel pumps or pressurized tank
systems of any type permitted. Fuel injection or superchargers
not permitted. Easily accessible fuel shut-off valve is
recommended on right side of the driver.
Ignition
May use heavy duty, factory electronic and HEI units (stock
housing, any cap, rotor, module or coil). No MSD units (rev
limiters permitted). No crank triggered ignition or computers.
Water
Pumps
May use cast stock or aftermarket aluminum pumps.
Radiator
Aftermarket aluminum radiator and fan shroud permitted. Must
have catch tank on radiator overflow, minimum two quarts. Any
car leaking water on the track will be black flagged.
Power
Steering Pumps
Stock or aftermarket block mounted power steering pumps
allowed. May use external reservoir. Steering may be
quickened.
Pulleys
Any steel or aluminum pulleys permitted.
Air
Cleaner
Any type of air cleaner permitted. No air boxes and no
funneling devices.
Battery
Only one battery may be used, automotive or marine battery
permitted. Battery may be mounted in trunk area. All batteries
must be securely mounted with an angle iron frame on top and
bottom. Batteries mounted in drivers compartment must have a
complete rubber covering. No plastic battery boxes permitted.
Starter
Stock, aftermarket replacement or mini starter okay. Must
mount in stock location on block. No reverse or bell housing
mount starters allowed.
Flywheel
Any
Clutch
Any clutch will be allowed.
Transmission
Stock type O.E.M. manual or automatic transmissions only. Must
have forward and reverse. Converter- less automatics okay. No
Bert or Brinn transmissions or direct drive allowed. All
vehicles must have operational reverse gear and be able to
shift from forward to reverse with the engine running.
Transmission oil coolers, if used, must be securely mounted
outside of drivers compartment. It is recommended that manual
transmissions have a SEMA/NASCAR approved steel bell housing
or scatter shield and automatics use a blanket or approved
scatter shield. Tazewell Speedway Modified Street Rules, cont.
Driveline and Brakes
Stock or 9 inch Ford allowed, any gear, full spools,
mini-spools or welded spider gears allowed. No quick change,
Detroit locker or gold track units allowed. No wide five hubs.
Floater rear ends and aftermarket high strength axles okay,
and are recommended. Driveline must be steel only, and painted
white. Two driveline hoops required, front and rear. Material
should be ¼ in thick and 2 inches wide. May use any type of
brakes.
Steering
and Suspension
OEM steering box only. No racks. Center link and tie rods may
be fabricated. Tubular upper a-frames allowed. Bite bolts
allowed. Front shocks may be relocated. Aftermarket springs
may be used. Any rear suspension allowed (other than
birdcages).
Wheels
and Tires
Any U.S. manufactured steel wheel permitted, 10 inch maximum
width bead to bead. No lightweight or aluminum wheels. Center
of wheel must be of heavy duty construction. 5/8 wheel studs
mandatory. ½ inch wheel spacers allowed, one per wheel. No
wheel adaptors allowed. Wheel off-set optional. Bead locks
permitted on all four wheels. Any track approved D.O.T tire
allowed. Hoosier RC-3 and American Racer DT-48
tire compounds are permitted. No grooving or alterations. No
mud and snow or recap tires permitted.
Radios
and Mirrors
No type of radio or any other two-way
communication with the driver will be permitted. Mirrors are
not permitted. |
