2018 Texana Raceway Park Pure Stock Rules
Pure Stock is stock division for the budget minded racer.
If you have the financial means or desire to modify your car outside of the following rules please consider racing in the appropriate division.
Minimum age requirement is 14 years of age – Ages 14 -17 must have a notarized release form signed by their parent or legal guardian and a copy of birth certificate on file with Texana Raceway Park.
All drivers are required to have a working raceceiver.
All Safety Equipment is Subject to Track Inspection and Approval, applies to all times a car is on the track including packing, both driver and passenger.
Snell-Rated Helmet in Good Condition, SFI-Approved full fire suit, fire retardant gloves, shoes and neck brace (or head and neck restraint system).
Minimum three inch wide SFI-Approved Five Point Safety Belt assembly required (2 inch with head and neck restraint system) and must mount securely to main roll cage with 7/16 bolts.
Fire-resistant roll bar padding required on any part of roll cage driver or passenger may contact while buckled in.
Aluminum high back racing seats required, (Driver and Passenger) must be securely mounted with a minimum of four 3/8 bolts.
Seat mounting must be integrated into roll cage design and be in stock OEM seating location, seat cannot be bolted to floor pan.
Minimum 16 inch X 20 inch driver’s side window net is required and must be mounted to roll cage so that latch is on top and front of window opening. (Also required on passenger side if passenger is in car).
Fire extinguishers are mandatory in the driver’s compartment within the reach of the driver when buckled in, must have a fill level gauge.
Recommend: Safety Belts to be no more than two years old.
Any American made OEM 1964 or newer full frame or unibody full bodied rear wheel drive stock passenger car, S -10 or Ford Ranger Pickups, Station Wagons must be metric framed.
No Camaros, No Firebirds, No Trans AMs, No Mustangs, No Corvettes, No Convertibles, No Sports Cars or No Front Wheel Drives allowed. GM to GM, Ford to Ford, Chrysler to Chrysler.
Frames must be OEM Stock, no cutting, shortening, lengthening or modifying is allowed.
Minimum wheelbase of 108 inches. (+ or – one inch) Frame may be X-braced.
Unibody cars may tie front frame to rear frame, may plate top section of rear unibody frame.
Full frame cars may replace rear frame section with minimum 2 inch x 3 inch x 095 steel tubing from 1 inch behind factory shock tower and be must be same length as material removed, shock tower must remain stock be in stock location and be full and complete.
Minimum of a four point roll cage with continuous hoops must be constructed of magnetic steel tubing of no less than 1.5 inch OD x .095 inch wall thickness and must be welded to OEM frame.
Main roll cage and halo must be a minimum of 1 inch above drivers head with helmet on and buckled in car. Main cage rear hoop must have a minimum of one horizontal bar and one diagonal bar from top of hoop to bottom of down bar. Main cage front uprights must tie together with a minimum of one horizontal bar. Front left and right kickers required from main cage to in front of engine.
Rear left and right kickers required from main cage to rear frame section.
Front and rear loops allowed. All welds must be complete.
Minimum of 3 driver’s door bars 1.5 inch OD x .095 inch wall thickness, parallel to frame and perpendicular to driver and a minimum of 2 horizontal passenger door bars (passengers are allowed, but 3 bars also required on passenger side if passenger in car).
Must be constructed with a minimum of 3 vertical bars from frame to top door bar in an intertwined fashion to strengthen door bar system.
Driver’s side steel door plate of 18 gauge or 0.0049 inch minimum thickness is required, plate must extend the full length of the door, may be welded into door bar system design. (Also required on passenger side if passenger in car). All welds must be complete.
Bodies must be stock appearing; panels may be replaced with stock appearing steel or aluminum aftermarket panels (18 or 20 gauge). Example: Five Star or Performance Bodies stock replacement panels.
4" max rear spoiler allowed. Small lift to hood over engine is allowed for accommodation of aftermarket hoods, but breather cannot protrude above stock hood line height. No wings, no skirts. , no air scoops, or anything that alters stock appearance. Bodies cannot be moved from the original rubber bushing location no more than + or - 1 inch.
Upper front windshield visor is allowed not to exceed 7 inches in width.
Doors must be bolted or welded shut, sunroofs and T-tops must be reinforced and enclosed.
All glass, plastic, upholstery, lights, mirrors, and trim must be removed.
Front inner fender wells may be removed.
Car must have A, B or C pillars. Front and rear firewall, floor pan must remain stock be full and complete and remain in stock location, floor pan may be cut for roll cage installation clearance only, all openings must be covered with 20 gauge steel to isolate the driver. Any rusted out or partially missing floor pans may be replaced or patched with 18 gauge steel.
Front and rear outer fenders may be cut for wheel and tire clearance. No excessive trimming of fenders or hoods allowed, must maintain stock appearance.
No enclosed interiors or decking allowed, no part of dash can be more than 28" inch from back edge of the center of the hood. Trunk floor may be removed.
Racecar and body should be maintained in such a manner as to keep a presentable appearance.
Inner skin may be removed from hood, truck lid and doors.
Hood and trunk must be secured with hood pins, no holes allowed in hood except for hood pins.
Must start each race night with all body panels including hood, trunk lid, fenders, nose or tail piece and bumpers. Cars with floppy or loose body parts considered as a safety hazard will not be allowed to compete until requested repairs are made.
A minimum of three vertical windshield bars are required in front of driver, must be solid steel bars minimum 3/8” OD (also required on passenger side if passenger in car) and must extend from upper windshield flange at roof to lower windshield flange at cowl.
No roof rake, must remain as OEM produced.
One Nerf bar per side allowed not to exceed 1 ½ inches from body line.
May be constructed of square or round mild steel tubing maximum of 1 ½ inch OD.
Must be rounded or closed and turned back toward body with a 90 degree angle on both ends, with no sharp edges.
Performance Bodies type Lexan Decal Protection OK, must be mounted be flush to body.
Nerf bar or decal protection may not extend past front edge of door and must end in front of rear wheel opening.
Stock type front and rear bumpers required with straps to prevent hooking.
Fabricated pipe front and rear bumpers will be allowed on cars with aftermarket nose and tail pieces.
All support piping must be behind nose and tail pieces, support may extend past front frame horns but no bracing allowed outside front frame horns.
NO CATTLE GUARD FRONT OR REAR BUMPERS – Subject to Track Inspection and approval.
No sharp edges Must have a visible chain loop for wrecker hook up on front and rear of car.
Any OEM factory production small block cast iron V-8 engine with a maximum of 364 cubic inch displacement. Stock replacement 2 or 4 valve relief pistons, no light weight pistons or wrist pins, OEM or OEM replacement 5.7 connecting rods only, aftermarket rod bolts allowed.
Stock OEM or OEM standard weight replacement cranks, minimum crankshaft weight 48lbs. no bull nosing, lightening holes or knife edging allowed. Maximum stroke of 3.48 inches. Engine balancing OK.
No splayed main caps. Engine bolts may be aftermarket. Aftermarket harmonic balancer OK.
Maximum engine cranking compression is 160 psi. For testing the engine rotating assembly will be “spun” by the starter, for five “hits” on the cylinder being tested. Aftermarket oil pans OK, recommend a 1” inspection plug. The plug should be located on the left hand side approximately 2” down from the pan rail and in line with a connecting rod assembly that is convenient to look at when the pan is installed in the car.
No type of windage trays allowed. OEM type timing chain system only, double roller OK, No gear drives or belt drives. Aluminum pulleys and serpentine belt system OK
Cast iron water pump, may be aftermarket. Aftermarket power steering pump with integrated tank OK
Motor must be in OEM location; solid motor mounts allowed but must be in OEM location, NO tolerance
**602 GM Crate engine is allowed with no modifications. Must be sealed with Crate engine bolt kit. Must run 2 barrel 4412 carb on crate motor option.
Cylinder heads -
OEM production unaltered cast iron cylinder heads with a minimum 72cc combustion chamber. OEM casting number must remain on heads. Vortec or double hump OEM heads not allowed. 305 heads allowed on 305’s only, 305 heads not allowed on 350’s.
Maximum 1.94 intake valves and 1.50 exhaust valves, Exception: 1.630 exhaust valves allowed on Chrysler Engines. Heads may be flat milled for surfacing reasons only, no angle milling.
Valve spring OD diameter must not exceed 1.250 inch (+ or - .015 inch).
Guide plates, 3/8 X 7/16 screw in studs and poly locks allowed, pinning of OEM studs allowed.
1.5 or 1.6 Stamped Steel Rockers on GM & Chrysler, 1.6 on Ford (No full roller or roller tipped rockers allowed).
No grinding of any kind allowed on heads, no gasket matching, no porting or polishing.
After-market valve cover with breather tubes OK. Oil diverters are allowed under valve covers.
Unaltered cast iron or aluminum OEM intake manifolds only. No aftermarket, bowtie, marine, or high-rise intakes. No internal modifications of any intake permitted, No deburring or grinding allowed.
Must have a ¼ inch accessible vacuum port on intake for Tech.
Camshaft and Lifters Hydraulic
Camshaft and hydraulic flat tappet lifters only, no hydraulic OEM roller lifters.
Rhoads, Variable Duration or “Bleed Down” lifters are not allowed.
Maximum valve lift of .450 inch measured at steel retainer.
Solid lifter will be used at tech for testing purposes. Maximum push rod length of 7.800 inch.
OEM firing order cannot be changed thru cam design. GM firing order 1-8-4-3-6-5-7-2.
Engine must have a minimum of 15 inches of vacuum at 1000 engine RPM. No tolerance
No vacuum canisters allowed, brake booster will be disconnected and capped during time of vacuum inspection.
One unaltered 500 CFM Holly 4412 2-Barrel, is subject to be checked with go-no-go gauge.
Removal of the choke flap is the only modification allowed, choke horn must remain, cannot be removed.
Must have two throttle return springs. An adapter/spacer will be allowed under the carburetor, maximum 1” thickness. No 4412 Ultra XP Carburetors will be allowed.
No GM Q/Jets, GM Spread Bores, Ford Motorcraft or Chrysler OEM 4-Barrels allowed.
No fuel injection. Maximum air cleaner of 14 inches diameter x 4 inches height. No top flow style air cleaners allowed. No type of RAM Air or Forced Air Induction will be allowed.
Pump Gas, Aviation Gas or Race Fuel with no additives, no methanol or smell enhancing additives. Mechanical fuel pump must be stock mount push rod activated; aftermarket manual type pump is OK. (Example: Carter, AC, Holley).
Electric fuel pumps are not allowed.
Fuel lines which pass thru driver’s compartment must be enclosed in metallic conduit or pipe from front firewall to rear firewall.
Racing Fuel Cell is required, maximum capacity of 22 gallons and must be enclosed in a 20 gauge steel container.
Must mount between rear frame rails and be properly supported and protected.
A minimum of two solid steel 2 inch in X 1/8 in thick straps are required around entire fuel cell.
Fuel cell may not be lower than rear frame rails.
Fuel Cell may also be mounted on top of stock trunk floor pan and be secured with 1 inch X 1/8 inch straps or 3/8 inch steel cable.
Fuel cell or tank must have a one way check valve to prevent fuel leakage in event of roll over. No plastic boat tanks.
Stock cast iron exhaust manifolds only, No 2 ½” center dump (ram horns), marine, or tubular steel type
exhaust manifolds. No headers. Exhaust pipes must turn down or extend past driver’s compartment. No porting, acid dipping or modifying manifolds of any kind allowed.
Only OEM production transmission allowed, with the exception of No 5, 6 speed or overdrive transmissions allowed.
All forward gears must be in working order on all transmissions, with a neutral and working reverse.
No aluminum or light weight flywheels.
Must have a fully operational torque converter with a minimum of 11 inch diameter with no modifications.
No “Dummy” converters. No Direct Drive automatic transmissions allowed.
Automatics must pass following inspection, with engine at idle, and brake applied, transmission must shift from “neutral” gear to “reverse” gear and from “neutral” gear to “low “gear, without causing engine to stall. Race car must remain stationary during such shifting and testing.
SFI Rated flex plate required, Scatter shield recommended on all automatic transmissions.
Transmission cooler OK, if mounted in driver’s compartment must be shielded to protect driver from fluid in case of leak.
Must have a minimum 10.5 inch clutch, pressure plate, OEM or OEM replacement steel flywheel.
Standard transmissions must have a ¼ inch steel plate covering the bell housing 180° over the sides and top of clutch assembly or explosion proof steel bell housing. Aftermarket clutch pedal, hydraulic master cylinder, and throw out bearing OK. Car must be self-starting.
All drive shafts must be steel with a minimum diameter of 2.5 inch, painted white with the car number.
Drive shaft must have a 360 degree safety loop constructed of min 0.25 inch thick by 2 inch in width and mounted within 6 inches of the front u-joint. No chain loops allowed.
Front and rear suspension must be stock for that make and model with no modifications.
No alterations to any part of the suspension will be allowed.
Nonadjustable tubular type upper control arms are allowed, must use steel cross shaft.
Following part numbers allowed:
- Day Motor Sports Part # UP-41000R/L, UP-910-34394R/L, Speedway Motors 910-34394R/L or 910-31134R/L, must install right on right (8” C-C), left on left (81/2”C-C).
- Speedway Part # 910-34397-91/4.
Cannot relocate or move upper A-arm mounts on frame.
Ball joints must be OEM replacement. No extended, low friction or rebuildable type ball joints.
Upper and Lower A-Arm bushings may be replaced with OEM rubber type only.
No offset, spherical or low friction bushings allowed front or rear.
Aftermarket steel springs allowed, minimum 5 inch OD springs, rear springs may be of single or double pigtail design and fit stock spring perch on rear end, may not exceed 14 inches in free height.
No adjustable spring spacers or adjustable weight jacks of any kind, Leaf spring cars may use nonadjustable lowering blocks, must use OEM replacement rubber style bushings in front and rear
springs, rear sliders not allowed. No bump stops of any kind allowed.
Sway bars allowed, must be OEM design, with equal height/spacing on each side, no preload.
Rear springs must have a minimum on one pigtail and pigtail must be mounted to factory axle perch. Non adjustable spring bucket allowed on rearend in stock location and center of rearend. Maximum free length of spring is 14 inches. (Updated 06/20/17
OEM stock mount replacement shocks only. Shocks can be claimed by track for $35 per shock at any time.
No air shocks. Shocks must have stock type rubber ends, no screw on type rod ends, must be mounted in stock location on frame. Shocks must fully collapse and extend.
Shocks must be mounted in stock location. Shocks can be aftermarket but cannot be rebuildable. No screw on type rod ends allowed. Must be steel bodied shocks. (updated 06/20/17)
Rear-end must be stock OEM for make and model of car. OEM Brackets in STOCK location.
Control arms cannot be lengthened or shortened. Any gear ratio is allowed as long as the housing doesn’t have to be altered to accept. Rear end must be locked. Mini spools OK. No limited slip or posi-traction allowed. Aftermarket axles are allowed.
Must use stock OEM gearbox for make and model.
May use aftermarket steering shaft, related components and quick release steering wheel disconnect.
Quick Steer is optional.
Drag link, tie rods and all other steering components must be OEM replacement for make and model.
Bolt on Spindle Savers OK.
Brake system must remain stock OEM. OEM pedals in STOCK location, brake pedal may not be extended.
Single (1) OEM or OEM replacement brake master cylinder. No brake bias adjusters.
Car must have a minimum of 3 wheel brakes in working order at all times, right front shutoff valve is allowed. RF brake must be operational if valve is in open position.
For safety purposes, rear disc brakes optional, rear disc brakes must be steel components only; caliper must be of single piston type only.
Any 15 inch diameter X 8 inch wide steel wheel permitted. 5/8 studs and 1 inch lug nuts are required.
Maximum 1 inch wheel spacers are allowed, minimum of 2 available threads must be visible on stud after tightening of lug nut. No bead locks, adaptors or tire screws are allowed.
Hoosier G-60, American Racer KK704, Southwest Speed Dirt 60, 60 Series Street Tires or 8-10 Inch Asphalt takeoff are allowed. Grinding, siping and grooving allowed, No chemical softening or conditioning.
The car must have a battery disconnect switch located outside the car and easily accessible to emergency track personnel and clearly label. If the car is equipped with a working alternator the switch must also disable alternator.
All cars must have an ignition switch and must be clearly labeled and accessible form outside of car for track personnel. Only one 12 volt battery is allowed.
Battery must be in sealed enclosure and securely mounted if in located driver’s compartment, recommended to be trunk area and must be between and above frame rails, subject to track safety inspection and approval. Aftermarket Starter OK, must be block mounted.
OEM Stock type distributor in stock location only, can be HEI or points type.
Aftermarket OEM style replacement components OK
All components of HEI distributor including coil must be internal, points ignition may run external coil.
No external spark boxes or adjustable rev limiters. NO traction control devices of any kind.
Excluding spark plug and external coil wires, maximum of 2 wires connected to distributer one switched positive for ignition and one for tachometer.
Only one radiator is permitted in stock location, Aluminum radiator OK.
Radiator protection is required, must not extend outside frame horns or forward of hood.
Radiator core support may be removed and alternate radiator support fabricated.
Water pump mounted fans only, spacers allowed, No electric fans.
Minimum Weight - 3400lbs. with driver and Maximum of 53% rear percentage to be checked after race. If after a race upon inspection a car w/ driver is over 53% rear percentage the driver will be allowed to address collected mud on the car and get one chance to rescale. (appointed tech inspector will watch removal of mud from car).
Minimum Weight – 3300 lbs. with driver and Maximum of 50% rear percentage to be checked after race. If after a race upon inspection a car w/ driver is over 50% rear percentage the driver will be allowed to address collected mud on the car and get one chance to rescale. (appointed tech inspector will watch removal of mud from car).
All ballast weight must be securely fastened.
Must be painted white and include car number. Ballast weight cannot be mounted inside driver’s compartment.
Numbers must be a minimum of 24 inches in height and 4 inches in width; must be on both sides of car and positioned on roof so it can be read from passenger side of car.
All numbers must be of a contrasting color and be easily read from scoring tower.
Recommend one 6’ number on front of car to aid in line procedures