2013 CLASSICS RULES
¤ All cars MUST have a strong, securely fastened tow hook on the front bumper/nose of the car.
Car Bodies and Attached Parts:
¤ Bodies must be made of fiberglass and in the style of 1932, 1934, of 1940 era cars. 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.
¤ No part shall protrude through the hood other than hood retaining hardware.
¤ Mirrors are allowed but may not protrude outside of body at any point.
¤ Side nerf bars can be of owner's 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 tires. No open ended bars exposed to other cars allowed. The nerf bars can come through the body and connect to the roll cage and/or frame. They cannot be built of any stock over 1 3/4"" outside diameter.
¤ A firewall and floorboard must cover as much of the interior area as is reasonably possible. The firewall and floorboard may be constructed of aluminum or metal.
Chassis and Suspension:
¤ The frame must be from the 78-88 mid size metric GM. 106” wheelbase minimum.
¤ The frame is required to have an X-brace built into the bottom of it.
¤ Only Steel shocks. $75.00 Buy rule per shock.
¤ 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 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 sit 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 back 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 four 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 locations.
¤ 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 centerline of A- frame pivot shaft. No minimum clearance from frame to pivot shaft centerline is required. Upper A-frame mount holes cam be slotted vertically or horizontally if wanted.
¤ The front chassis cross member can be trimmed off below the drag link assembly for ease of repairs and clearance.
¤ A catch can is required to be connected to all radiators.
¤ Radiator must mount in front of engine.
¤ OEM type belt drive water pump.
Driveshaft and Universal Joints:
¤ Steel driveshafts only
¤ A drive shaft loop is required just rear of the front u-joint.
¤ The drive shaft must be painted white.
¤ All cars are required to have a master shut off switch mounted in clear view and reach of the drivers window for easy emergency crew access.
¤ OEM type distributor is required.
¤ No Traction Control
Radios are NOT allowed at 411 Motor Speedway.
Raceceivers are mandatory.
¤ NO 265, 283, 302, 327, 350 or 400 ENGINES ALLOWED PERIOD!
¤ Only 305 cubic Chevy 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 cu. in. No additional tolerance allowed.
¤ Legal 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 combinations allowed.
¤ NO PORTING OR POLISHING ALLOWED. Valve face and seat angle combinations are to owner's option. Valve guides and seat replacement is okay 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 okay. The stock 3.48" stroke must be maintained. A 2.065" rod journal minimum 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 can not 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 can not be more than 1.275" diameter. Springs can only be of original style consisting of one outer spring and one 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 pushrods 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 can not 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 what 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 two eyebrows but no solid dome pistons allowed. Wrist pins can be floating or pressed and bushings allowed. No gas porting or 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 go getting 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 cars and trucks allowed. Commonly used casting numbers are 14057055, 14014432 and 10185063. They can be of two or four 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 ($100.00) buy rule for balancer.
¤ Engine location is to be setting as close as possible to the center of the racecar chassis between the front frame rails.
¤ Setback - Second plug back to be no farther back than center of upper ball-joint. 1" tolerance.
¤ Any header may be used. There WILL be a $300.00 buy rule for headers.
¤ Gasoline ONLY. Specific gravity may not exceed 750.
¤ BOX STOCK HOLLEY 2 BARREL 4412 ONLY. NO OTHER 2 BARREL OR 4 BARREL CARBURETOR ALLOWED. $400.00 buy rule
¤ 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 3" rear of rear most point of rear end assembly cover. A maximum of 2270 cubic inch outside displacement allowed.
¤ Engines must retain a wet sump system. Flow routing can be of owner's choice. Remote oil tanks are not allowed. NO DRY SUMP.
Rear Axle Assembly:
¤ The rear axle assembly must be OEM for 78-88 mid size GM metric cars such as Monte Carlo, Cutlass, Regal, or Grand Prix. Either 7.5" or 7.625".
¤ NO 9 INCH FORD or QUICKCHANGE REARENDS.
¤ Gear ratio - Any
¤ The carrier for the ring gear can be of owner's 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.
¤ 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.
¤ A stock torque converter is required. A 12 inch outside diameter is required.
¤ No valve pedals.
¤ Maximum tread width on front and rear is 76 inches.
¤ Width is determined at the axle of spindle centerline and at the widest point on the tire side wall.
Weight Requirements After Race:
¤ Minimum car weight is 2400 pounds with driver after the race.
Wheels and Tires:
¤ Only 8" wide x 15" diameter steel wheels are allowed.
¤ Only 2", 3", and 4" offset wheels are allowed on either side
¤ Only 8" wide x 15" tires.
¤ 26.5 or 27.5 American Racer Medium Compound or Hoosier Medium Compound tire.
¤ Any car found illegal following qualifications or heats must prove to be legal before starting feature event.
¤ Head, Bore and Stroke - $200
¤ Cubic Inch Check $250
¤ Complete - $550 Track retains 1/3