For the purposes of this rule book and governing events at the speedway, the word "stock" means: - Available on stock passenger car models, from the car manufacturer, installed per the manufacturers specifications, with no modifications, visual or technical, stock appearing, stock performing unless as otherwise noted in this rule book. All items not mentioned are to be Stock.
NOTE: All cars racing for weekly points in the SE Challenge Series must meet the speedways rules for the class.
INTENT
It is our intent to provide a class of cars which: Are fast and challenging to drive but less expensive to build, operate and maintain than Pro Stock class vehicles. These cars will provide close, exciting competition for the fans and the competitors with the emphasis being on the driver, his crew and their setup and driving skills. This class is a logical choice for every driver who wishes to ultimately race in the Pro Stock class at the speedway.
APPROVED MODELS
North American, front engine, rear wheel drive cars, only. No sports car models. 108" minimum wheelbase with not more than one inch variance (+ and -), side to side. No Camaro front frame sections or equivalent. Models must remain Chev on Chev, etc.
ENGINES AND ENGINE COMPONENTS
Stock. Chev 350, Ford 351 (Windsor) or Dodge 360 ci engine. Open chamber heads only. Maximum compression ratio of 9.0:1 (9.0:1 = 9.0:1) Heads must have had an original combustion chamber of: Chev 76 cc Mopar 67 cc Ford 60 or 69 cc (Depending on the piston)
- GM head - Maximum intake diameter of 1.94", maximum exhaust diameter of 1.50". - Ford head - Maximum intake diameter of 1.84", maximum exhaust diameter of ï.55". - Dodge head - Maximum intake diameter of 1.88", maximum exhaust diameter of 1.5I7".
Steel retainers must be used. Stainless steel valves are allowed. Minimum weight for the Piston and rod assembly is 1350 Grams. Dished or flat top, cast or forged, 4 eyebrow pistons. OEM prduction type only. CAM - Stock Lift. Any duration with a Maximum Valve Lift as follows;
INTAKE
EXHAUST
GM
.390
.410
FORD
.445
.453
DODGE
.410
.410
Hydraulic cam only. May use a cam button. Valves must not have over zero lash clearance Maximum over bore allowed without penalty is .030. Any larger overbore must be brought to the attention of the tech prior to the start of the season or race event. Harmonic Balancer must be correct stock type for the engine. OEM only. OEM production parts only including rods and crank.
Any car which wins three features is eligible to have it’s engine claimed by the Speedways. The Claim amount is $3950 (plus tax). Anyone refusing a claim will lose his points and purse for that event. If an engine is claimed it is the responsibility of the Claimee to remove it before the car can be removed from the speedway. Failure to do so will result in disqualification.
SPEC ENGINE - An inexpensive, reliable and competitve Spec Crate engine is available for $3950 plus tax. SPEC engine must be purchased form the speedway authorized dealer. Orders must be placed through the speedway. 506 388-2415. For information on the crate engine please click here.
ENGINE PLACEMENT
Stock Measuring from the back of the block (at bell housing flange) to the center of the rear axle housing cannot be less than 84% of the wheel base. Shortened Ford's may notch frame for engine to fit in appropriate location. Ford may have an additional 2" setback. Crank height must be at least 12.5" at the center of the crank while at the cars legal ride height.
EXHAUST
Header or Stock Ram Horn Manifold allowed. Headers recommended. If headers are used they must have no larger than a 1 and 5/8 inch tube and collect into a single 3" collector and a maximum 3 and 1/2 inch OD exhaust from the collector to the end of the exhaust pipe. No "stepped" headers allowed Exhaust must exit the car behind the driver compartment and to the right hand side of the car. Exhaust must be pointed down toward the ground and remain under the car. Exhaust may not exit through the side of the car. Header tubes may not cross from one bank of tubes to another and may only join at the collector, not before.
IGNITION
Stock. Distributor and coil must be stock OEM including all weights and springs. No Tachometer allowed other than in practices. Tach must be removed or have a section of wire at least 6" in length that is removed for competition. Wire can not be simply "disconnected". Stock firing order.
OIL PAN
Any steel oil pan may be used No, dry sump systems A steel kick out is allowed. Valley trays may be used
WATER PUMP and COOLING
Stock. An electric fan is allowed provided belt and pulley system remain in working order.
RADIATOR
Aluminum allowed in stock location. Hood must close without modifications Water is the only coolant allowed Cars which have other coolants will be fined for creating an environmental and driving hazard, if discovered. Over flow can may remain. Overflow run off hose must exit up through the right front fender at the corner of the windshield
INTAKE MANIFOLD
Stock Cast iron, 2 or 4 barrel low rise intake manifold for your engine Manifold must be easily accessible to everyone No rare manifolds even if cast iron. No Truck or Bus manifolds. No, aluminum or marine manifolds
CARBURETOR
Stock 500 cfm HOLLY Carb. # 4412 only Choke assembly may be removed Serial numbers must be readable Any carb may be claimed by the speedway for the value of a legal replacement Carburetor, including taxes Two return springs are compulsory A 1 and 1/8" thick spacer plate is allowed and must remain stock. No modification allowed. GM and Mopar are allowed two stock type gaskets, one thin and one thick No carb hats or air deflecting devices are allowed Stock Air filter housing only No Air Boxes allowed
AIR CLEANER
Stock type, Moroso or K & N element filter allowed. Air cleaner housing must be an approved type with a flat round metal top and bottom of the same size between 12 and 14" in diameter.
TRANSMISSION
Stock A 3 or 4 speed (steel cased) manual transmission is allowed If a 4 speed transmission is used both 2nd and 3rd gears must not exceed the maximum allowed overall gear ratio of 525. No variable ratio transmissions allowed
SAFETY EQUIPMENT
A Clean drivers fire suit is mandatory. A minimum, 4-point safety harness no older than 5 years, fastened to frame or roll cageA Snell 85 registered helmet is required to be worn on the track
A minimum of 3 inches of clearance between the drivers helmet the overhead roll cage bar is required
All glass except windshield must be removed Windshield must have safety glass or Lexan Quarter windows and back windows are optional, and must be made of the same material as the windshield Drivers window net is mandatory Must have a minimum 2 1/2 lb.. fire extinguisher in the race car, securely fastened, within easy reach of the driver, and with recharge date no later than January of current year. If battery is in drivers compartment, it must have a protective covering and be securely fastened to the floor Every car must have a kill switch (shut off switch), located on or near the window opening on the drivers side (where windshield wiper was originally mounted or in front of drivers window opening). Shut off ON / OFF must be clearly marked.
BODY
Stock appearing Steel , fiberglass, or aluminum body or kits allowed Safety retainers on hoods are required Trunk lids must be functional Body must be centered on frame and retain its stock appearance, dimensions and angles Must have all doors, fenders, trunk lid and hood on the car when the race day begins A Complete steel firewall and floor boards around the driver of 22 gauge steel or better is mandatory Aluminum is allowed elsewhere in the interior but steel is recommended for optimum fire safety An after market rubber nose and tail "cones" are allowed, providing they match the body No ground effects are allowed A maximum 5" high x 60" wide trunk deck spoiler is allowed as measured across the back face of the spoiller. No side boxing of the spoiler is allowed. No, holes in hood. Hood must fit against windshield. If cowl induction style hood is used it must be sealed off to the engine compartment. Minimum Ride Height for GM Metric cars = 6" as measured from any part of the frame to the ground Minimum for all others with longer than 108" wheelbase is 4" A 5" diameter, maximum, left side mirror is allowed. Mirror must be inside the car body. A Rear mirror is allowed The back of the drivers seat to the center of the rear housing should measure no less than 25" Rub rails, must be of flat aluminum or lexan and must be flush with the body with bolts countersunk and have no sharp edges Note: Ford and Dodge power trains may run on a stock GM A Body Chassis. Otherwise car must be GM on GM, Ford on Ford, and Dodge on Dodge No, mismatching parts
The following body guidelines will apply per the corresponding body measurements templates
"A" Minimum Front Nose Height = 18 "
"B" Maximum Front Overhang = 45"
"C" Minimum Window Opening = 16"
"D" Maximum Rear Window Length = 37"
"E" Minimum Body "Side Panel Clearance" to the Ground = 4"
"F" Maximum Rear Bumper Height = 17"
"H" Minimum Roof Height = 47"
"J" Minimum Door Height at the Rear = 35"
"K" Maximum Quarter Panel Height at the Rear = 35" "M" Maximum Rear Deck Length = 23"
No roof rails or wings Side windows may not be filled in No "cut down" body panels. Cars, especially top teams, found outside these guidelines in one or more areas will be penalized and or required to modify to the guideline based on competition. Top teams should adhere to these rules strictly to avoid penalty. All panels and windows or windshields must be braced to prevent bowing at race speed, as necessary. "Mother of Downforce" or other high performance body sytles are not allowed. Front bumper excepted. No Dirt style front ends allowed. A full 1/8" thick lexan windshield is required. A rear window is recommended for better performance due to the higher speeds at the facility. Dodge or Ford running on a GM Metric Chassis must run a full Dodge or Ford Power Train. Anyone wishing to run Dodge or Ford power on a GM Chassis must receive prior written consent. Dodge or Ford on a GM Chassis may be subject to weight adjustments to ensure fair competition. Front quarter fender and side of the nose must remain open for "Driver Contingency Award" sponsors Top 8" of Windshield, full width, must remain open for the Class Points Fund Sponsor Bumpers must be used both front and rear. Bumpers can be reinforced from behind.
Click here to view a detailed Body Template for measurement points purposes, only. Note: Ignore the measurements in the template. The measurements to use are as per the above.
The top 8" of the Windshield must be kept open for the class sponsor. In addition the space behind the front right wheel and in fron to of the door numbers must be left open for contingency award sponsors if you wish to participate in the Contingency Awards Program. See Awards for more information.
BRAKES
Stock. Master cylinder must be in stock location or have a 10 lb weight at the stock location.. Stock type aluminum brake drums are allowed. Braided Steel Brake lines are allowed. Any Stock type pedal allowed. An adjustable, single line, brake bias valve is allowed in the drivers compartment for adjusting the rear brakes, only. Raybestos "Brute Stop" type drilled rotors are allowed.
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REAR END
Stock. A mini locker is allowed (a piece of pipe to join the two axles) or you may weld your axle gears. Ford 9" Rear End is allowed. See the "Weights" section for more information.
GEAR RATIO
Maximum gear ratio allowed at CFS is 5.25:1 (final drive) with transmission in second gear for 3 speeds or 3 gear for 4 Speeds. RGS maximum is 592. Ford or Dodge drive train in a Chev Chassis will have a maximum gear ratio of 510:1 at CFS. RGS max for this type drive train and chassis is TBD. To find your ratio multiply rear end gear ratio by transmission ratio in second gear. EXAMPLE: Rear end gears - 2.73, times transmission ratio - 1.89; (2.73 x l.03 = 5.1597). No l to l ratios. All gears in transmission must remain and must be a stock gear for that transmission. See the "Transmission" section for further information relating to Gears.
CLUTCH AND FLYWHEEL
Stock. Must have blow proof bell housing or scatter shield around bell housing at least 1/4 inch thick or approved blanket. 180 degrees around, is required on all cars with manual transmission. A stock steel flywheel weighing not less than 15 lb is required. Stock OEM type clutch plate, measuring a minimum of 10" in diameter is required. No high performancce clutches allowed.
ROLL CAGE AND ALL OTHER PIPING
Steel roll cage constructed of no less than 1 1/2 - .095" wall - tubing around driver or any pipes specified below. Tubing around the driver recommended as 1 ¾ - .095 recommended. No exhaust pipe is allowed. Must be welded directly to the frame of the car. Roll cage can not be set back on the frame. Must be four upright pipes joined at top with four pieces of pipe to form a top "hoop". Uprights must be welded directly to frame and ahead of raised portion for rear wheels. The bottom of top hoop must be a minimum of 3" above the top of the drivers helmet. Must extend the full width of the roof so that the roof will be supported on the passenger side as well as drivers side. A bar from the frame to the driver' s door is required to protect the drivers feet . There must be three pipes a minimum of l 1/2 inches in diameter and .095 thick on the inside of drivers door between front and rear roll bar. 1 ¾ " recommended. It is required that a minimum 1/16" plate be welded between or over (covering) these door bars to form a solid mass. Fuel cell protection bar is required. Roll cage must have two braces going back to the frame at the rear for support. All cars must have front and rear "Tow Hooks or Chains" securely attached to the top side of the cars tubing for easy removal when disabled.
DRIVE SHAFT
Drive shaft must be painted white. Drive shaft must be of stock size and weight for the drive train. Chev must be at least 2 and 3/4" in diameter with or without Ford rear end. Steel composition only. Safety loops must be made for drive shaft, front and rear.
FRAME and SUSPENSION
Stock. Spring wedges may be used in coils. Single coil springs only may be used. Lowering blocks may also be used. Any spring may be changed as long as it is the same style after-market or otherwise. All springs must be in stock location. Jacking Bolts allowed. Upper control arm may be cut to allow clearing of the jacking bolt. Spring pockets may be reinforced or cut out to allow a longer spring. Stock 2 x 3 tubing material may be used to replace the frame from the rear housing to the back. Wheel base may not vary more by more than 1" from one side of the car to the other. Stock sway bar remains in stock position on frame and lower control arm. Sway bar may be adjustable at lower control arm only and have stock mounts in stock position only. If chassis came with sway bar on the rear, it may be used, as long as it remains in stock location. A 6" tubed upper control arm is allowed. Minimum ride height for a 108" chassis is 6" at the lowest point. Minimum ride height for a 112 or longer (i.e. 114") chassis is 4" at the lowest point. Weights may not hang below the frame rails. Grandfathered Leaf Spring Cars may compete and may be subject to a competition penalty as necessary. Ford Crown Victoria or Chev Caprice frame may be shortened to 108". Cross member may be modified to allow for minimum crank height. Frame rails must be at least 54.5 " long if shortened and all 108" rules will apply for the entire car (eg. ride height, crank height, engine setback. etc.) No steel or partial steel bushings.
SHOCKS
Stock OEM Passenger Car shocks are allowed. Cars may run AFCO Part#'s 1274B, 1275B, 1276B, 1277B and 1278B shocks. No 5 Digit split valves allowed. Shock must be installed with part number pointing out for tech viewing. Shock must be mounted outside upper control arm.
WEIGHT
Base left side weight is 56%. Maximum rear weight is 46%. Cars must weigh 3000 lbs and meet all applicable percentages at the end of the race, with the driver in position. The speedway reserves the right to adjust these weights and percentages in order to ensure a fair level of competition.
STEERING
Stock.
FUEL and FUEL CELL
Must be enclosed in a steel box, installed in trunk with filler neck inside of trunk. Four Drainage holes should be drilled in the bottom of the steel box to allow spilled gas to drain from the box. Fuel tank cannot be lower than the middle of the axle tube and must be centered between the side frame rails. No electric fuel pumps or pressurized fuel tanks. Must have full 22 gauge steel fire wall between gas tank and driver. Gas line must be under floor. May use Regular (81 Octane) Gas only with a Maximum specific gravity =.765.
TIRES & WHEELS
Tire for the class is the Hoosier 890 purchased from the CENTRE Steel wheels, 10" maximum. Larger wheel studs are recommended. Tires are not to extend past the body by more than 2" Maximum tread width is 68" measured from outside of tire to inside of tire All competitors are encouraged to notify the speedway prior to April 1st of your tire requirements for the season in order to ensure ample supply
COMMUNICATIONS and MISCELLANEOUS
A Scanner is required Two way radios are allowed for communications between the driver and their spotter/crew. Only the speedways race control channel may be coded in the scanner
