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[Home][Message Board][Texas D.I.R.T. Motorplex Rule Book][Track Info]

 

Factory Stock

2007 RULES & SPECIFICATIONS

Body: Any American made stock passenger car or truck, or Chrysler uni-bodies. No front wheel drives. No aftermarket plastic nose or tail pieces, no spoilers, wings, skirts, air scoops, or anything that alters stock appearance. A front visor is allowed on the windshield area. Sun roofs and T -tops must be reinforced and enclosed. No external rub bars or nerf-bars allowed. Must have a minimum of three windshield bars in front of driver. If carrying a passenger, bars must continue across entire windshield opening. No ballast or weight allowed. All glass, plastic, upholstery, lights, mirrors and trim must be removed. All doors must be chained, bolted or welded. Front inner fender wells may be removed. Cars must be strictly stock. No cutting, channeling, shortening, or modifying is allowed. Front and rear outer fenders may be cut for wheel and tire clearance. Must have stock type front, and rear bumpers. Seat, steering, clutch, and brake pedals must be in stock location. No quick steering allowed. Quick release steering wheel is allowed. No enclosed interior. 

Roll Cage: At least a four-point cage, minimum size 1-1/2" O.D. by .095 wall thickness. Minimum three driver side door bars and two on passenger side is required. If carrying passenger, you must have three bars on passenger side. Four point quick release seat belts and harness required for driver and passenger. Racing seat optional. Must have a window net for driver and passenger.

Engines: Must be stock for the make and model. All engine components including water pumps, distributor, etc. must be strictly stock. May run mini starter an after market pulleys. Metric cars may run 350. Engine must be in stock location. Solid motor and transmission mounts are allowed.

 Camshaft, Valvetrain, and Cylinder Heads: Hydraulic cam and lifters only, .447 maximum lift, or maintain minimum of 14" vacuum at 1200 RPM. 1.94 maximum diameter valves on all small block Chevrolet. Stock size valve springs only. Stamped steel 1.5 rockers only, no roller tips. Open chambered cylinder heads only, must be unaltered, OEM steel heads May use stock type screw in studs.305 chevy engines may use 305 heads.

Carburetion and Fuel System: Must be on naturally aspirated unaltered stock type carburetor. No more than 1” spacer or adapter. Can remove choke. Gasoline only.

Exhaust: Stock cast iron exhaust type manifolds only, Chevrolets no center dump, corvette or marine type manifolds. Mufflers required

Intake Manifold: Stock intake only. No hi-perf., hi-rise, cutting or porting.

Transmissions: Stock automatic, or standard transmission. Transmissions, flywheels, clutches, and torque converters strictly stock. Transmission cooler is allowed. All drive-shafts must haveloop 6” from front u-joint, and be painted white.

Fuel: Gasoline only, no additives. Stock type fuel pumps for make and model. Fuel tank may be in original location or secured in trunk. Fuel cell recommended.

Suspension: Front and rear suspension must be stock for that make and model of car. No air shocks or aftermarket racing parts. No alterations to any part of the suspension will be allowed. Any spring no spacer must sit in unaltered stock mounts. Any stock mount shock.

Rear end: Stock rear-end for make and model. Gears must remain unlocked, no posi-trac.

Steering: Must remain in stock location. No quick steer boxes allowed.

Radiators: Any radiator that fits in original location without any body modifications is allowed.

Brakes: Must use stock type Master cylinder and brake components. in stock location. Must have at least 3 working brakes. No brake shut off or bias adjustment is allowed. 

Tires and Wheels: 8" max. wide wheels allowed, 15” dia. steel wheels only, no bead locks or screws allowed. No bleed-off valves. Must run l lug nuts. Asphalt pull-offs only, no grooving of tires front and rear.

Courtesy Rule: Any car from another track with Minor rule infractions will be allowed to race one night. 

Claiming Procedure: Carburetor claim $100.00 and swap, Shock or Spring claim $20.00 each and swap,Distributor claim $100.00 and swap.

CLAIM RULES- The official claiming area is in the tech area, or wherever track designates. Claim must be made immediately after the "A" feature race finishes (checkered flag). Only the driver may make the claim. Driver must have money. The claiming driver must be on the same lap as the driver being claimed.

Only the top three cars may be claimed. A driver can claim another driver’s engine, carburetor, distributor, or shocks only once during the year. In the case of multiple claims on the same engine, carburetor, distributor, or shock, a draw will be held with claiming drivers to determine who gets claim. Refusal to sell forfeits all cash, trophies, and points for the night. If claim is refused, claim is not held against driver who claimed.

 Protest Rule: Any driver in the same race on the lead lap may protest another car immediately after feature in the tech area. $ 250.00 cash per component $ 50.00 to the track, if legal protested car gets $ 200.00 if illegal protester gets $ 200.00 back.