2006 PURE
STOCK RULES
2006 PURE STOCK RULES
I. GENERAL
All components are subject to inspection and approval or inspecting officials. No equipment will be considered as having been approved by reason of having passed through inspection unobserved.
II. CHASSIS
A. Cars must be 1960 or newer, stock passenger, street type cars. No commercial vehicles, convertibles, or sports cars are allowed. Frame, body, and engine must be absolutely stock for that make and model car with no plating allowed of the frame.
B. Wheelbases must be stock for make and model of car with a minimum stock wheel base of 110" for unibody cars; 108" for full frame cars. No Camaros are allowed.
III. WEIGHT
The minimum weight after a race, including the driver, must be 3,400 pounds. Add-on weight must be securely bolted see safety rule # 27 (Any add on weight must be bolted to the frame or roll cage with the minimum of two 1/2 inch bolts and be painted white with your number on it. Any car loosing add-on weight during any race while be disqualified from that race.) Every car taking the checkered flag must weigh. Any part, either falling or knocked off a car, will not be allowed to be put back on the car before weighing.
Front and rear suspension must remain stock. Shocks must remain in stock location only. After market springs and shocks are allowed. Shimming for frame height is allowed.
V. BODY
Stock body only. No body modifications or gutting is allowed. All chrome, glass, plastic, and interior must be removed. All doors must be welded or bolted shut. All headlight, parking light, and taillight assemblies must be removed. Body must be neat and have acceptable metal stock front and rear firewalls. Must have full stock floorboards. Trunk and rear fender wells are required. Inner liners on front fender wells may be removed. Inter-door panels may be removed from the driver's and front passenger's sides. Car must be brightly painted in colors that contrast with the car numbers. Fender wells may be trimmed to a maximum height of 18" from the center of the axle. Hood scoop, or box, may be a maximum of 3" tall above the hood with no opening for outside air and closed on all sides. Underside of the hood may be removed. Hood and trunk lid must be pinned. Nerf bars permitted. Interchanging or replacing of body parts with metal must be approved by technical official.
VI. STEERING
Stock steering box must remain in original location. Steering column may be removed and replaced with a shaft, but must keep the stock collapsible shaft intact. Driver must remain on left side of unaltered drive shaft hump with no rear seat driver location permitted. No modifications of hump. Steering linkage will remain stock with no reinforcing permitted. Quick steering is optional.
VII. ENGINE
A. The engine must be strictly stock for that make and model of car and in the original location. All internal components must be stock or stock replacement. Hydraulic cam shaft only. Aftermarket lower crankshaft reduction pulley allowed.
B. Stock carburetor only for that make and model. No Holley carburetors allowed. Stock cast iron intake manifold 2 or 4 barrel with no adapter. No Bowties allowed. Carburetor must bolt directly to intake.
C. No electric fuel pumps. Stock mechanical fuel pumps only in the original location. No regulators allowed.
D. The use of fuel injection, super or turbo charges, nitrous oxide, and water injection will not be allowed.
E. Stock battery type ignition only. No magnetos, dual points, or after market ignition. No modifications to the distributor except advance curve kit. After market plug wires are allowed.
F. Bore size allowed: stock plus .060 plus .010 for wear. Stock appearing oil pans.
G. Small block Chevrolet cars four (4) eyebrow stock type flat top or dish pistons. No lightweight pistons allowed.
H. Small block Chevrolet approved steel head casting #'s are as follows: 014, 195, 267, 330, 336, 339, 388, 393, 441, 445, 454, 487, 493, 545, 598,624, 642, 709, 799, 813, 862, 881, 882, 920, 991, 993, 997, 14102187, 14102191, 14102193, 14022301, 14014416, 354434, 1414440, 367450, 517513, 14020555, 14022601, 358741, 14022801, 3297185 with maximum intake valve size is 1.940 and maximum exhaust valve size is 1.500. Big block Chevrolet must use open chambered heads. Ford cars, no after market or SVO heads. Chrysler cars, no after market W2 heads, 360 inch heads only. Must be 76 cc heads or larger.
I. Small block Chevrolet powered cars maximum .450 lift hydraulic cam.
J. Big block Chevrolet powered cars maximum .500 lift hydraulic cam.
K. No small block 400’s allowed.
L. Vacuum Rule—Cars must pull 12 inches of vacuum at 1200 R.P.M. immediately after a race.
M. Screw-in studs are allowed. Stock spring diameter only, with a maximum of 120 lbs. seat pressure.
VIII. SAFETY
See all safety rules. Cars must have approved windshield screen (expanded metal, etc.). “16 x 20” widow net mandatory.
IX BRAKES
Must have O.E.M. brakes with a minimum of two (2) wheel brakes. Three (3) or four (4) wheel brakes are recommended.
X. WHEELS
7" or 8" aftermarket steel wheels or stock steel passenger car
wheels. No bead locks allowed.
XI. TIRES (2006)
Tires are limited to a maximum of 60 series. Street type passenger car tires displaying a D.O.T. number on the sidewall and passenger car tread design. Grooving, siping, cutting back to size or any other modification is not allowed. No special racing tires, duals, knobbies, mud, snow, off-road tires, recaps, and I.M.C.A. pull offs are allowed.
XII. MUFFLERS
Mufflers are not required at this time.
XIII. ROLL CAGE
A. All cars must have a four (4) post roll cage surrounding the driver and anchored to the frame on both sides of the car. A roll bar, in front of the driver and behind the driver, tied together on each side at the top, will form the basic roll cage. All corners of the roll cage must have gussets. A cross bar from the top right corner of the rear roll bar to the bottom left corner of the rear roll bar is recommended. Minimum roll bar material is 1 1/2" O.D. tubing or 1 5/8" O.D. black pipe with .095" wall thickness. At least three bars must be welded between the front and rear roll cage posts on the left side of the car for driver protection. Additional roll cage protection is optional. Roll cage may be braced to front frame behind upper A-frames.
B. Padding of roll bars around leg, arm, and head areas is mandatory.
XIV. REAR END
A. Rear ends must be stock for make and model of car only. They may be locked.
B. Drive shaft must be looped in front and painted white.
C. No spacers allowed on rear end hubs.
XV. TRANSMISSION
Automatic or standard transmissions in stock location with all working gears are required. Automatic transmissions must have 11" minimum working torque converter see safety rule # 30 and # 31. (Automatic transmission must be approved scatter shield or blanket. Scatter shield may be constructed of 1/4 inch X 3 inch steel 270 degrees around flex plate. Shield may be welded and bolted to floorboard inside car. Transmission cooler must be located under hood or in trunk of car. Any cooler lines running through driver’s compartment must be run through metal pipe or conduit. Standard transmissions must use explosion proof steel bell housing and must have a working clutch. 10.5" minimum clutch face, single disc only. No multi-disc clutch and no aluminum clutch parts. No early Z-28 or corvette flywheels. Stock O.E.M. non-lightened flywheels only.) Must have a front drive shaft loop and the driveshaft painted white.
XVI. BUMPERS
A. Cars must have stock bumpers. Front may be narrowed to the width of the front frame horns, ends must be capped and smooth.
B. Bumpers can have no sharp edges, corners, or ends. No car will be allowed to compete without a rear bumper. No trailer hitches are allowed. Welding and chaining bumpers allowed. One bar to attach front bumper to frame on each side is optional.
XVII. FUEL CELL
Fuel cell must be located a safe distance from the driver in the trunk compartment with a firewall between the driver and the cell. Firewalls must be constructed so in case of fire, flames cannot enter driver's compartment around, under, or over the firewall. Cells must be securely mounted with a minimum of two (2), one (1) inch steel straps. Trunk floor may not be removed and must have holes for ventilation and drainage.
XVIII.FUEL
Pump gasoline, only, with no additives is allowed. Approved track gasoline is allowed.
XIX. RADIATOR
A. Only one radiator is allowed, and it must be centered in front of the engine in a vertical position. Aluminum radiators may be used.
B. Electric fans are allowed.
C. Fan shroud must be approved by the technical official.
D. A single loop no larger than 1 1/2" diameter pipe may be run from the front of the radiator to the back roll cage.
XXX. BATTERY
One 12 volt battery only, see safety rule # 27 for installation. (Battery must be in a marine type case with at least one 2 inch steel strap 1/8 inch thick, 270 degrees over the case.)
01/29/2006