2018
Classic Car Rules (Updated 7-1-18) CAR BODIES
AND ATTACHED PARTS: · Body must maintain standard windshield openings
and standard body size, no narrowing of bodies of any kind. No spoilers, air dams
or aerodynamic enhancing devices of any kind allowed any place on car or chassis.
These cars are intended to represent the era when they were originally racing.
· Bodies must be made of fiberglass and in the style of 1932, 1934,
of the 1940 era cars. Must have solid firewall and floorboard. · 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 allowed. Rear window openings no
larger than: SEDAN 9 ½ inches tall 44 inch width, COUPE 7 ½ inches
tall 47 inch width. · No part shall protrude through the hood other
than hood retaining hardware. · 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 front or rear
bumper becomes unattached, car will be parked for that event. Rear bumper not
to exceed 76 inches. CHASSIS, ROLL CAGE AND SUSPENSION: ·
The frame must be from the 1978-1988 mid size metric GM. 106" wheel base
minimum. The frame must maintain its stock dimensions no holes or cutting to lighten.
Roll cage set back: 22 inches from center of rear end housing to closest point
of roll cage, with a 1 inch tolerance. A minimum of 1 ¾ inch by .095 inch
O.D. Round steel tubing must be used for roll cage. All 4 points of hoop bar must
be welded directly to frame. · The frame is required to have an x-brace
built in to the bottom of it. It must be attached to the original frame no brackets
off of frame. · Only steel shocks. $75 buy rule each. · A
fully adjustable dual master cylinder brake pedal and master cylinder assembly
is allowed. Any aftermarket steel caliper is allowed. · Springs, 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 owner's 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 damager 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
original location. · Any upper A-frames can be of owner's 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
or horizontally if wanted. · The front chassis cross member can be trimmed
off below drag link assembly for ease of repairs or clearance. COOLING
SYSTEMS: · A catch can is required to be connected to all radiators. ·
Radiator must mount in front of engine. · OEM type belt drive water
pump. 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. ELECTRICAL SYSTEMS: ·
All cars are required to have a master shutoff switch mounted in clear view and
reach of the driver's window for easy emergency crew access. · No traction
control. · No radios are allowed. · OEM type distributor is
required. Any HEI Large Cap Distributor. ENGINE SPECIFICATIONS:
· No 265, 283, 302, 327, 350 or 400 engines allowed. · Any steel
I-beam rod, 5.7 lenth only. Any rod bolt, rods must be style and profile of stock
GM production rod. 2.100" rod size can be used, rod beams canniot be polished.
Outside of rod must have all casting marks. · 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. · Legal heads consist of the cast iron emissions GM factory
head. Replace it with this: Any 305 head with 184 max valves 53cc up to 1996 model.
No Vortex heads. 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 owner's 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 cannot 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. Any crank
minimum weight of 50 pounds with cam gear. 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. No 2.00" rod
journals. The oil flow holes may be chamfered. · 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
springs 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 ration 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
left allowed regardless of ration 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 engines 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
is allowed. · 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 $100 buy rule for balancer. ENGINE
LOCATION: · 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.
1 inch tolerance. EXHAUST SYSTEM: · Any header may be used.
There will be a $300 buy rule for headers. FUEL SYSTEM: ·
Gas Only, NO E85 or Oxygenated. · Box stock Holley 2 barrel 4412 only.
No other 2 barrel or 4 barrel carburetor allowed. $300 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 cannot be further than
3 inch rear of rear most point of rear end assembly cover. A maximum of 2270 cubic
inch outside displacement allowed. OILING SYSTEM: · Engine
must retain a wet sump system. Flow routing can be of owner's choice. Remote oil
tanks are not allowed. · No dry sump allowed. REAR
AXLE ASSEMBLY: · The 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". · No 9 inch Ford or quick change rear ends. ·
Gear ration - ANY · Any steel axle may be used for safety. ·
The carrier for the ring gear can be of owner's choice no full spools, a locker
positrack and spider eliminator or welded spiders or mini locker. GM CARRIER ONLY. ·
Standard drum brake set-up or standard OEM disc brakes on rear axle assembly with
steel caliper such as Camaro or Firebird. NO AFTER MARKET ALLOWED.
TRANSMISSION: ·
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. Transmissions buy rule $450 with
convertor. · A stock torque convertor is required. A 12 inch outside
diameter is required. · No valve pedals. TREAD WIDTH: ·
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.
WEIGHT REQUIREMENTS AFTER RACE: · Minimum car weight is 2500
pounds with driver after race. WHEELS AND TIRES: · Only
8 inch wide and 15 inch diameter steel wheels allowed. · Only 2 inch,
3 inch and 4 inch offset wheels are allowed on either side. · Only 8
inch wide by 15 inch tires. · 26.5 Or 27.5 American Racer Medium Compound
or Hoosier Medium Compound Tire. Tire
protest: Any car can protest
a tire and have it sent to Blue Ridge for testing for $100. Blue Ridge's decision
will be final. All protests must be at the scales and be made immediately after
qualifying and after the feature. Refusal is an automatic disqualification. MISCELLANEOUS
TRICKS: · No drilling, grinding, acid dipping, coating, cutting
or any other means allowed for purposes of weight reduction, aerodynamics, air
flow or any other purpose allowed on engine, body, frame, or any other part of
car. · ANYTHING NOT CLEARLY DEFINED IN THESE RULES WILL BE ILLEGAL. PROTEST
AND SAFETY: · See Race Track Rules and Fees. HEADS
- Any 305 with 184 max valve 53cc up to 1996 model NO vortec FUEL
- NO E-85 or oxygenated BUY RULES - Shocks $75 each Headers
$300 Transmission and Converter $450 Balencer $100 Carberator $300
Motor $2500 Option to protested can swap for $500 Minus Carberator and
Adapter, Fuel Pump, Power Steering, Fan Blades and Pulleys Any buy rule claim
can only be done after feature race. |