Tazewell Speedway Classic Car Rules
Bodies and Attached Parts:
· Bodies must be made of fiberglass
and in the style of 1932, 1934, of the the 1940 era cars. Must have solid firewall
· No covering of side or rear windows is allowed.
The passenger side window must be cut out to allow driver exit. A roof hatch is
· No part shall protrude through the hood other than hood
· No mirrors allowed
· Side nerf bars
can be of owners design as long as they protect from tire climbing as much as
possible. The front and rear of the nerf bars must be curved in toward body closer
than outer edge of tire. No open end bars exposed to other cars are allowed. The
nerf bars can come through the body and connect to the roll cage and or the frame.
They cannot be built of any stock over 1 ¾"" outside diameter.
· A firewall and floorboard must cover as much of interior area as is reasonably
possible. The firewall and floorboard may be constructed of aluminum or metal.
Bumper Mounts (2 per side)
IF BUMPER COMES OFF DURING COMPETITON, YOU WILL
BE BLACK FLAGGED
· The frame must be from the 1978-1988 mid size metric GM. 106"
wheel base minimum.
· The frame is required to have an x-brace built
in to the bottom of it.
· Only steel shocks. $110 buy rule each
· A fully adjustable dual master cylinder brake pedal and master cylinder
assembly is allowed. Any aftermarket steel caliper is allowed.
minimum of 5 inches outside of diameter. There is no minimum or maximum length
requirement. Front and rear springs must mount in original locations. No coil-over
shock and spring combinations allowed. The spring mounts on the top of the rear
end housing can be made or modified so springs set on them properly.
Weight jack bolts are allowed on all 4 corners as are spring buckets. The side
of the frame beside the front springs can be cut out to owners choice.
Any size diameter front sway bar is allowed from any stock production vehicle.
Any mounting and adjustment design can be used. GM, Ford, Chrysler or other allowed.
Any rear sway bar allowed.
· Any power steering gear allowed that will
bolt on original GM location.
· Any power steering pump and pulley
assembly allowed. Any manual steering box allowed. Steering quickeners are allowed.
No rack and pinion units allowed!
· Tie rods, drag links, idler arm
and steering arm must all be OEM parts for this chassis. Steering box and idler
arm can be shimmed at the frame mount for best alignment or clearance problems
as from wreck damage or front frame rail alignment.
· Aftermarket steel
rotors are allowed on front spindles and any size lug studs are allowed. OEM rotors
can be reinforced for safety.
· Only metric 1978 to 1988 chassis spindles
are allowed. No big metric spindles allowed.
· Both front lower A frames
and all 4 rear control arms must be stock and original length. Stock rear uppers
may be modified.
· All frame and control arm mount points must be in
· Any upper A- frames can be of owners choice. Any
location is allowed for vertical placement of inner mounting point of upper A-
frame or center line of A- frame pivot shaft. No minimum clearance from frame
to pivot shaft centerline is required. Upper A-frame mount holes can be slotted
vertically of horizontally if wanted.
· T he front chassis cross member
can be trimmed off below drag link assembly for ease of repairs or clearance.
1. A catch can is required to be connected to all radiators.
· Radiator must mount in front of engine.
· OEM type belt drive
DRIVE SHAFTS AND UNIVERSAL JOINTS:
· Steel driveshaft only.
· A driveshaft loop is required just rear of the front u- joint.
The driveshaft must be painted white.
o All cars are required to have a master shutoff
switch mounted in clear view and reach of the drivers window for easy emergency
o OEM type distributor is required
o No traction control
o No radios are allowed
OEM type distributor is require. Any HEI Large cap Distributor
· No 265, 283, 302, 327, 350 or 400
· Only 305 cubic Chevrolet engines allowed. They must
be original 1 or 2 piece rear main seal design. Cast iron blocks only. No 4-bolt
main blocks allowed. A maximum of 0.060 overbore plus tolerance equaling 3.806"
allowed or 316 cubic inch. No additional tolerance allowed.
heads consist of the cast iron emissions GM factory head. These heads will have
a casting number of 376450 or 14022601 only, with a minimum combustion chamber
volume of 53cc. They must be totally of the same design as original on the early
305 engines such as valve angles, valve cover mounting and total bolt pattern
for head bolts and intake bolts. Any head that shows definite performance gains
will be omitted from competition. No vortec head or intake combination allowed.
· No porting or polishing allowed. Valve face and seat angle combinations
are to owners option. Valve guides and seat replacement is ok but do nothing to
improve placement or locating angles. Heads are meant to only have a good basic
head job done and nothing to build significant horsepower gains in flow or other
characteristics. Resurfacing is allowed. The boss shoulder where the short head
bolts go through can not be shorter than 7/8" or 0.875". Head gaskets
must be no less than 0.038" minimum thickness after compressed.
Balancing of all rotating parts allowed. No excessive metal removal. Must be a
GM stamped crankshaft. It can have your normal engine rebuilding work, but no
major weight saving or knife edging of throws allowed. Journal radius work is
ok. The stock 3.48" stroke must be maintained. A 2.065" rod journal
allowed. The oil flow holes may be chamfered.
· Minimum crank weight
of 50 pounds.
· Any of the 5.7" length normal production line
stock GM rods for small blocks allowed. Only 2.100" rod bearing size rods
can be used. Any rod bolts allowed. The beams cannot be polished.
Valves must be of original 1.50" and 1.84" diameters or smaller. Aftermarket
stainless steel valves or such equivalent are allowed. Brush or swirl finish valves
are allowed but no mirror finish valves. OEM stem size is required. Valve springs
cannot be more than 1.275" diameter. Springs can only be of original style
consisting of 1 outer spring and 1 inner flat style damper spring. Springs must
have no more than 120 pounds closed seat pressure.
· Any type steel
spring retainer and keeper assembly allowed. Any screw- in or press-in rocker
studs allowed. These include 3/8" or 7/16" rocker studs. Guide plates
are allowed, as are hardened push rods of any length. Stud girdles are optional.
Stamped steel long-slot rocker arms, roller tip rockers, or roller rockers are
allowed. Rocker ratio is optional.
· The cam must be a flat tappet
hydraulic design with original size diameter lifters. No mushroom or roller lifters
allowed. Hydraulic lifter only. The cam lift cannot exceed .420" at the valve.
This is checked with a solid lifter in place of the hydraulic lifter. A 0.005
tolerance will be allowed or maximum due to production tolerances allowed by cam
manufacturers. Nothing more than that will pass as legal. This is the maximum
lift allowed regardless of ratio rocker you have chosen to use.
Pistons can be cast or forged. They must have 4 eyebrow marks defined in the piston
dome flat top design. Defined dish pistons allowed with only 2 eyebrows but no
solid dome pistons allowed. Wrist pins can be floating or pressed and bushings
allowed. No gas porting of pistons from the top allowed.
· Block decking
is allowed. This is checked with a straight edge held in line with wrist pin and
engine cranked over with starter. Piston must not hit straight edge above block
while cranking. All normal engine rebuilding machine work allowed on block. Oil
drain holes can be screened. Oil paths can be polished to assist in return flow.
Do not get exotic with your work as you could push over the limit. Minor work
· Any standard production stamped GM small block Chevy
intake for trucks and cars allowed. Commonly used casting numbers are 14057055,
14014432 and 10185063. They can be of 2 or 4 barrel design and cast iron or aluminum.
They must be of the late model emissions type with EGR valve mount on the intake.
It must be plugged off and not functional. No vortec, off- road or marine intakes
allowed. No porting or polishing allowed. A carburetor spacer or adapter with
a 1.5" maximum thickness allowed.
· Any timing gear and chain
allowed. No gear drives allowed. A cam walk button and cam thrust bearing allowed.
· Any harmonic balancer may be used. There is a One Hundred Dollar
and no cents ($100) buy rule for balancer.
· Engine location is to be setting as close
as possible to the center of the race car chassis between the front frame rails.
· Setback -Second plug back to be no further back than center of upper
ball joint. 1inch tolerance.
Any header may be used. There will be a $300 buy rule for headers.
· Gas Only, NO E85
· Box stock Holley
2 barrel 4412 only. No other 2 barrel or 4 barrel carburetor allowed. $400 buy
rule on carburetor.
· Any fuel pump allowed that mounts on original
engine fuel pump location. No belt drive or electric fuel pumps allowed.
Any air cleaner is allowed as long as it does not force outside air into the air
cleaner as in a ram air effect. Any flow directional device used inside the air
cleaner is permitted.
· A fuel cell is required of no more than 8 gallon
capacity. It must be mounted above and between the rear springs. Rear side of
fuel cell can not be further than 3inch rear of rear most point of rear end assembly
cover. A maximum of 2270 cubic inch outside displacement allowed.
· Engine must retain a wet sump system.
Flow routing can be of owners choice. Remote oil tanks are not allowed.
No dry sump allowed.
REAR AXLE ASSEMBLY:
rear axle assembly for 78 thru 88 midsize GM metric cars such as Monte Carlo,
Cutlass, Regal, or Grand Prix. Either 7.5" or 7.625".
2. No 9 inch
Ford or quick change rear ends.
· Gear ratio -Any
carrier for the ring gear can be of owners choice and either steel. It can be
a spool, locker positrack, and spider eliminator or welded spiders.
Standard drum brake set-up and/ or disc brakes on rear axle assembly.
1. Only the GM TURBO 350 automatic transmission is
allowed. No turbo 400, Power Glide, or MANUAL transmissions allowed. All length
350 turbo transmissions allowed. Cases with Chevy and B. O. P. bolt patterns allowed.
Transmission buy rule $450 with convertor.
2. A stock torque converter is
required. A 12 inch outside diameter is required.
· No valve pedals.
1. Maximum tread width on front and
rear is 76 inches.
· Width is determined at the axle of the spindle
centerline and at the widest point on the tire sidewall.
REQUIREMENTS AFTER RACE
· Minimum car weight is 2400 pounds
with driver after race.
WHEELS AND TIRES:
8 inch wide and 15 inch diameter steel wheels allowed.
2. Only 2 inch, 3
inch, and 4 inch offset wheels are allowed on either side
3. Only 8 inch wide
by 15 inch tires
4. 26.5 or 27.5 American Racer Medium Compound or Hoosier
Medium Compound Tire
See Tazewell Protest rules
See Tazewell Safety Rules
Track reserves the right to delete, change or amend rules in the interest of competition