Chatham Speedway  

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Rules

Crate Late Model

WE WILL BE RUNNING THE SAME RULES AS THE 2017 NESMITH CRATE LATE MODEL WITH A FEW EXCEPTIONS.


  1. You ARE ALLOWED to run a non-crate engine with the following restrictions

             A. Must be a wet sump motor (must have a minimum 7 quart oil pan)

             B. Must run a Holley 2 barrel – May remove the choke plate

             C. Minimum weight of 2,500 lbs.


2.  Will run same tire rule as Nesmith but tires do not have to be stamped.




Limited Modified

We will be running the same rules as the 2017 IMCA with a few exceptions.


     1. Tires will be the 27.0 and 26.5 H-500

     2. Chassis headers are legal




B-Mod

This class is designed to run very economically – If it does not say you can do something (don’t do it) 

  1. BODY – Can run Modified or Sport Mod car – NO quick change rear-end.

2.    SAFETY – Must have all safety equipment – This is Mandatory.

        A.  Racing fire suit and helmet required

        B. Racing seat required

        C. Five (5) point hookup and seat belt

        D. Fire extinguisher, fuel cell

        E. Window net or arm restraint

        F. Metal plate 1/16” thick on drivers side

3. ENGINE – Cast iron heads and block

4. CARBURETOR – 4412 Holley – 2 barrel stock ONLY; May remove choke plate

5. TRANSMISSION – Manual or Automatic

 Automatic – Must have working forward and reverse.

 Manual – With 3 speed may run mini clutch; May also run Brinn, Bert or Falcon.  If you run one of these three, you must put 50 pounds of weight in front of the bell housing.

 6. TIRES – Asphalt pull offs – no grooving – No siping or tire softener.

7. FUEL – Pump gas or racing gas




Factory Stock

BODY:  Any American made stock passenger car body on a stock unaltered full frame, or Chrysler & Ford unibodies.  No front wheel drives.  Stock appearing aftermarket plastic nose or tail pieces are allowed.  Rear of car must be sealed off, no exposed fuel cell. Stock spoilers allowed, aftermarket cannot be over 4” tall, side panels included.   Bodies cannot be moved from the original body mount rubber bushing no more than  +/- 1”cannot be less than 5 ½ “ from ground.  A front visor is allowed on the windshield area MAX 7 inches.  No side or rear window visors allowed.  Sunroofs and T-tops must be reinforced and enclosed.  No nerf bars.  Maximum one inch wide by two inch tall steel or lexan rub rails allowed – bolted flush to body.  All glass, plastic, upholstery, lights, mirrors, and trim must be removed.  Cars must be stock appearing.  No cutting, channeling, shortening, or modifying of body is allowed.  No excessive trimming of fenders or hoods allowed, must maintain stock OEM appearance.  All doors, fenders, and window openings must remain stock appearing and OEM dimensions and be the same on both sides.  No straight slab sides.  No enclosed interiors, or decking allowed.  Original OEM front and rear firewalls must remain in stock location and be full and complete.  Cars must have a complete stock steel roof mounted in OEM location and OEM rake and angle for model.  All openings should be covered as to isolate the driver, subject to track approval. Racecar body should be maintained in such a manner as to keep a presentable appearance.  Camero and Mustang chasis are legal.

FRAME: Frame must be full and complete.  Cannot be Widened, Narrowed, Shortened, Lengthened, or be Cut, Bent, or Altered to change Suspension Brackets.  Rear of frame behind upper shock mounts may be replaced with round, square, or rectangular tubing.  Cannot narrow right rear frame for tire clearance.  No frame alterations allowed.  All Bars forward of cage must be lower than the hood.

BUMPERS: stock type rear bumper required, a fabricated front bumper may be used with the following conditions: cars (with aftermarket nose pieces)-the bumper may extend cars without nosepieces – the bumper may not extend past front frame horns.  NO SHARP EDGES

ROLL CAGE: Minimum four-point cage, minimum size 1 ½ “O.D.by .095” wall thickness.  Minimum three bars in driver’s side door, and two bars on passenger side door (three bars if passenger in car).  Four-point quick release seat belt and harness required for driver and passenger.  Racing seats required.  Must have window nets and firesuit for driver and passenger.  Must have at least three bars in front of driver and passenger in windshield area.  Door Plate recommended.

ENGINE: Must be stock for the make and model except no 400’s or larger small or big blocks.  Cast piston only, Chevy must use 4 equal valve relief pistons.  OEM crankshaft only- cannot be lightened.  No aerowning, bullnose, knife edge, undercut or drilling of second or third rod throws.  OEM steel connecting rods only must remain stock OEM length, weight and shape.  No lightening of any parts.  Aftermarket water pump, mini starter, pulleys, harmonic balancer and oil pans okay.  Aftermarket power-steering pumps okay.  NO stroking or de-stroking.  Engine must be in stock location.  Solid motor and transmission mounts okay.  Maximum cranking compression 175 lbs. (ignition off, engine turned over 5 times).  Oil pans must have at least 1” inspection hole.

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CAMSHAFT, VALVETRAIN, AND CYLINDER HEADS: Hydraulic cam and flat tappet lifters only.  .447 maximum lift.  Must maintain 14” of vacuum at 1200 rpm.  1.94 maximum intake valve diameter, 1.50 maximum exhaust valve diameter on Chevrolet engines.  No hollow valve stems.  Stock size and shape valve springs and retainers.  Stock length and diameter pushrods only.  Stamped steel 1.5 rockers on Chevy, 1.6 on Ford and Chrysler, NO roller tips.  Open chambered heads only, must be unaltered, OEM  NO porting, polishing, or gasket matching allowed.  The only GM head numbers allowed are 14079267, 3986336, 3986339, 3986339X, 3986388, 3932441, 376445, 3928454, 3932454, 3876487, 3973487, 3973487X, 3973493, 3951598, 468642, 330862, 333882, 3998920, 3998991, 3998993,  3998997, and 3970126.  Screw in studs and guide plates ok.  305 engines may use 305 heads (no vortec).

CARBURATION AND FUEL SYSTEM: Cast Holley 4412 – 2 barrel only.  Must be unaltered.  Choke plate may be removed.  4412 must be cast into choke horn of carb.  Maximum spacer and adapter 1” combined total.  Fuel pump must be in stock location for make, NO electric pumps or fuel injection even if factory equipped. 

EXHAUST:           Manifold’s or Headers allowed

INTAKE MANIFOLD: Stock OEM unaltered aluminum or cast iron intake only.  No aftermarket or stock high performance or high rise.  No bowties.  No porting, polishing, cutting or gasket matching.  Low rise Aluminum Dual plane Intake allowed.

TRANSMISSIONS: Any stock type automatic or manual.  Automatics must have stock appearing working 11” torque converter cannot be smaller with ring around it.  No direct drives.  Transmission Cooler ok.  Manual must have single disc 10.5” clutch, flywheel and pressure plate must be steel, minimum 15 lb. steel flywheel.  No mini clutches.  Steel drive shafts only must be painted white and have a loop 6” from front u-joint.

FUEL: Pump or racing gas only.  Fuel cell must be secured in trunk any part of fuel cell cannot be forward of any part of rear end.

SUSPENSION: Front and rear suspension must be stock unaltered  OEM for that make and model of frame, ball joints, spindles and all components.  No air shocks. No alterations to any part of the suspension or frame will be allowed.  Any spring in stock location no spring rubbers, no adjustable weight jacks of any kind, must sit in unaltered stock mounts.  May run IMCA type upper control arms.  Sway bars must be stock for make and model mounted in OEM mounts.  No suspension stops of any kind.  Shocks must have stock type rubber ends, no screw on type rod ends even if welded, must be mounted in stock location on frame, control arm and rear-end.  No bulb-type, threaded body, coil-over, or remote reservoir shocks.  No external or internal bumpers or stops no Schrader valves on shocks. 

BALL JOINTS: May run aftermarket ball joints but must be stock OEM dimensions.  Rebuildable ball joints ok.

REAR END: Stock rear-end for make and model no modifying axle bearings or length.  All brackets and control arm, shock mounts must be in stock location.  Gears may be locked. NO Detroit lockers or torque sensing devises.  9” Ford rear-end and floater are ok.

STEERING/DRIVER SEAT: Steering boxes must remain in stock location.  Aftermarket steering wheel and quick release steering coupling are recommended.  Quick steer boxes allowed.  NO part of deriver seat may be any further back than 25” forward center line of rear end housing.

RADIATORS: Any (1) radiator that fits in original location without any body modifications is allowed.  Water pump mounted fans only, No electric fans.

IGNITION: One 12 volt battery only must be mounted securely in rear of driver’s compartment or trunk area.  One stock type distributor, module and coil in stock location only.  Ignitions on/off switch must be clearly marked.  NO traction control devices of any kind.

BRAKES: May use any (1) one master cylinder.  Aftermarket pedal OK. Must have at least 3 working brakes.  Right front may be blocked.  No bias adjustment is allowed.  Disc brakes allowed in rear.  No aluminum or composite rotors or calipers.  Must use steel stock type rotors on rear disc.  No lighting of components.

TIRES AND WHEELS: 8” maximum wide wheels allowed, 15” diameter steel wheels only, wheel covers, mud plugs, bead locks, allowed.  NO bleed-off valves.  Must run 1” steel lug nuts.  Approved Hoosier asphalt pull-offs only 1070, F45, F50, F56, F40’s.  Must durometer 51 or higher.  No grooving, siping, or softening allowed.

WEIGHT:  Weight may be securely added in trunk or under the hood, but not in plain view or within the driver’s compartment must be painted white with car number.  Car must weigh minimum 3,000 lbs. with driver after race.

COURTSEY RULE: Any car with “minor” rule infractions will be allowed to race (1) event.  Must be determined before the race.  Cars with infractions are subject to weight penalty.


ADDITIONS:

We WILL allow 602 crate engine with the Holley 2 barrel carb 500 cfm, motor must have seals.

Cars that run headers, must have 36" of 2" pipe on each side

Cars that run 9" rear ends including floaters, must have brackets in stock location.

If you have any questions about stock location contact tech man.



Street Stock Rules


We will follow NE SMITH 2017 rules with the following exceptions.

(1) Tires - The following tires will be allowed

                  Hoosier H-500

                  Hoosier 500

                  Hoosier G-60

                  American Racer KK 704

                  Grooved asphalt pull-offs


(2) Spoiler

Any 8" spoiler does not have to be built to NE SMITH spec, but CAN NOT be over 8" tall


(3) Tail Piece

Rear tail piece is optional






Compact

Mandatory – All cars must have mufflers

This is a STOCK RACE CAR.  NO MODIFICATIONS TO DRIVE TRAIN.

PARTICIPANTS – This class is open to anyone 12 years of age or older.  Drivers under 18 must show proof of age and must have a parent to sign the waiver every week.

CHEATERS – ANYTHING no covered by the following rules: Abuse of rules and creative interpretation of the rules should be checked with a tech inspector before proceeding.  If it is not factory DON’T DO IT!  Any decision or questionable items about rules is up to the tech inspector and his or her decisions are final.

SCANNER – All drivers must use a scanner.  This is for the scoring tower to put you back into your correct position.  You may not use two-way communication scanner.  We will give you the frequency.

ELEGIBILITY – Four and six cylinders only – NOTHING CAN BE LARGER THAN (GM 3.1L), (FORD 3.0L), AND (CHRYSLER 3.0L).  NO turbo charged engines.  Must be the same as was available for year/make/model of car and must be in stock location.  Trucks/Mini Vans see rule above.

SUSPENSION/BRAKES – DON’T TOUCH THEM. DON’T MODIFY ANYTHING.

TIRES – 13 -15 inch tires, or you may run KK704 American Racers or H500 Hoosiers.

WHEELS – Aftermarket okay

GETTING YOU CAR READY CHECKLIST:

1. REMOVE ALL GLASS

2. REMOVE HEADLIGHTS

3. REMOVE TAIL LIGHTS

4. REMOVE ALL INTERIOR

5. REMOVE HOOD LATCH/ REMOVE INSULATION UNDER HOOD IT WILL BURN

6. REMOVE TRUNK LATCH AND BREAK TENSION BAR SO TRUNK STAYS CLOSED BY OWN WEIGHT

(REMOVE INSULATION)

7. MUST HAVE RACING SEAT

8. YOU CAN MOVE BATTERY INTO PASSENGER COMPARTMENT WITH BATTERY BOX FOR YOUR PROTECTION.

9. TAKE HUB CAPS OFF AND PAINT RIMS

10. ADD A TOW CHAIN TO FRONT AND BACK BUMPERS.  THIS IS MANDATORY

11. PAINT CAR

12. ADD YOUR FAVORITE NUMBER

13. HELMET REQUIRED/ NO OPEN FACE

14. RACING SUIT REQUIRED

15. ROLL CAGE MANDATORY.  MINIMUM 1 ½ “.0965.  MUST HAVE FOUR DOOR BARS ON DRIVERS SIDE.  DRIVER DOOR MAY BE HULLED OUT TO ACCOMMODATE DOOR BARS.



Beginner Class


THIS CLASS IS FOR BEGINNERS ONLY


Car can be Street Stock or Factory Stock Car

Head restraint is highly recommended

Fire Suit, Gloves, Racing shoes, and helmet required

This class will run for a trophy each night.