Econo mod


1.    ROLL CAGE: Roll cage must consist of continuous hoops not less than 1.500” outside diameter. Must bemounted to the frame in at least 6 places. Roll cage must be securely supported and braced. No brace bars forward of cage may be higher than hood height. A minimum of 3 driver door bars so as to provide maximum protection for driver. Driver’s bar should be padded and taped, including head rest. Roll cage must extend above driver’s head and be properly padded.

2.    BRAKES: Rotors and associated mounting hardware are to be steel only. Calipers may be steel or aluminum

3.    EXHAUST: Headers/ Exhaust system must be mounted in such a way as to direct gases/fumes away fromcockpit and away from possible fuel spillage. No Tri-Y Headers, merge Collector Headers, or turn downs on exhaust

4.    FUEL CELL: Professionally manufactured fuel cell is required. Fuel cells must be mounted by at least twosteel straps, 2 inches wide around the cell. Cell must be enclosed in a steel container and must be protected in rear of axle by roll cage tubing mounted securely. No part of cell should be lower than the protective tubing. Fuel cell must have check valves on vent side. Bladders are highly recommended. Fuel cells are limited to 32-gallon maximum capacity. 12-inch ground clearance required. Tech inspectors can reject any fuel cell mounting they deem unsafe.

5.    BATTERY: Battery must be securely mounted and shielded. If battery is mounted inside of cockpit, it must bein a 6-sided metal case.

6.    FUEL:  Non Oxygenated race or pump gas

7.    TIRES AND WHEELS: Any8” Hoosier or American Racer,medium or harder allowed on the right rear. Any 8” Hoosier or American Racer on other 3 corners. Only 8” wide wheels.  

8.    FRAMES:

1.    Factory production complete full 1960 or newer parallel American passenger car frames only. Frames may be cut in rear only at a point no further than 36” from center of rearend housing. Must have full front stub

2.    Frames may not be widened or narrowed and must be able to support roll cage on both sides. Front crossmember may be notched for radiator clearance only! Minimum frame height and body height from ground is 4”

3.    Front suspension upper A-arm mount may be altered whereby it does not have to be in stock location. Stock passenger car type spindles only, no fabricated spindles. Lower A frame cannot be altered or moved. Pre-approved aftermarket lower control arms are legal, but must remain in factory location.  Front sway bar must be OEM. Heim joints will be allowed on steering components.

4.    Tube type upper A-arm allowed

5.    5” coil-over shocks are permitted on rear end.

6.    No Jeep, Bronco, or 4-wheel drive frames allowed. No sports car frames allowed. No front wheel drives allowed.

7.    Rear of frame may be altered to accept leaf or coil springs. Any coil spring must be at least 4-½” outside diameter. No fiberglass springs allowed. NO torsion bars allowed in rear of car.

8.    No hydraulic, ratchet or electrical weight jacks anywhere in or on the car. No air shocks or air bags allowed

9.    Minimum wheelbase is 108 inches on both sides NO TOLERANCE!

10.  No aluminum or fiberglass suspension or rearend parts allowed. No aluminum driveshafts

11.  Shocks: Only steel non-adjustable shocks permitted; one shock per wheel. Dummy shock or eliminator may be used on left rear (must be o valving and no Schrader valves, be prepared to pull shock at any notice). There will be a $150 per shock claim

9.            BODIES: refer to drawing at bottom of page

A.    12″min 24″ max

B.    6.5″ min center to center

C.   The minimum roof height is 42” inches with a maximum height of 54” inches. 5″ max slope.

D.   The sides of the engine compartment will remain open. Any side panels in the engine compartment area will not be permitted. A six (6.5”) inch drop on either side of the hood will be permitted and it must enclosed at the rear of the hood. The firewall on driver’s side must meet the front of the door.  Hood must slope towards the nose of the car (No Reverse Rake to the Hood).

E.    Farthest point of nose/bumper cannot be no more than 42” from center of front wheel hub.

F.    The max scoop is 7″

G.   The top of the doors must remain in line with the rear engine plate. The bottom of the doors may extend a maximum of eight (8”) inches past the motor plate toward the front of the vehicle.

H.   Front roof post width 16″max at the bottom. Roof post at the bottom rear must then go upward at a 90 degree angle. The front roof post must be in a straight line from top to bottom and must come down to the deck with a max 2″ step (P) .

I.      WHEELBASE: Minimum 108″, maximum 112″

J.     Door panel 32″max 26″min

K.    72″ max. or not past block at top. may extend forward to cover foot box if necessary.

L.    12″-18″ door opening height

M.   With a level, must have no more than 2″ clearance at rear roof, and 5″ at top front. Original roof line of vehicle must be maintained with a maximum of five (5) inches of slope measured with a level from highest point minus the stiffener to lowest point. No more than one-half (1/2) inch stiffener allowed at the rear of the roof. OEM Gremlin roofs are not allowed.

N.   right side length 120″ max, 106″ min.

O.   Rear corner panel length from center of hub to back 48″ max, 34″ min.

P.    7″ max at top rear, gradual slope from roof to this point when using sail panel as spoiler side with max heigth spoiler of 5″. The spoiler may be fabricated from lexan or aluminum. You may use the roof post/spoiler kit. The kit has the roof post and spoiler fabricated in one piece. If the kit is utilized the spoiler height must remain 5” inches. The Sailpanels must be the same design and size on each side (Both open with same opening dimension or both closed). Maximum bow of sailpanel is 4”. 8″ max spoiler allowed if the sail panel remains seperate from the spoiler sides. wehn using 8″ spoiler, sail panels can be no higher than 4″ from deck at end point.

Q.   Interior slope is 8″ max from front to rear and flat across and must maintain same slope from front to rear. You must have used 50% of your 8″ max slope at the half way point on the deck.

R.   The minimum deck height is 28” inches with a maximum height of 41” inches. 2″ max drop deck allowed.

S.    The nose piece shall not be attached any further back than the radiator. The MD3 modified nose and Dominator nose will be legal. All aluminum fabricated nose pieces can have a 2 1/2” lip on each side of nose piece (length of the nose). Farthest point of nose/bumper cannot be no more than 42” from center of front wheel hub. The nose piece must have a minimum of four (4”) inches from the ground to the bottom edge of the nose piece. Noses must be flat from top to bottom (No curving of nosepiece).

T.    hood max width is 68″ max 24″min. No narrower than radiator.

U.   The maximum roof width will be 52” inches with a minimum of 44” inches.

V.    The maximum roof length will be 57” inches with a minimum roof length of 40” inches

W.  On the left side the rear of the door may flare out six (6”) inches for tire clearance. The bottom of the flare must be curved and rounded not pointed in any fashion. No wheel skirts of any type will be allowed.

X.    The maximum body width at the body’s widest part will be 72” inches. The minimum of width at the body’s narrowest part will be 53” inches. The top of the doors measured at rear of driver seat can be a maximum of 68”

Y.    No filler panel required.

All cars must have a car number on both sides and the roof that are at least 18” inches in height and 14” inches in width Side fins and/or flanges of any kind along the length of the entire car (hood, and/or roof) will not be permitted.  There will be a half inch tolerance for body roll for strength.

Rear wheel openings must remain same on both sides of car and maintain a minimum 2” wheel clearance.

Crate Option Cars: SEALED 602 crate engines may utilize a 5” wicker bill on left side of nose and a 3” wicker bill on left side of roof (wickerbills will be measured from flat surface of roof and nose, must not exceed 3” on roof or 5” on nose in total material from the flat surface including bends, angles and supports. wicker bills must measure equal to or shorter in length than the roof or nose.) All cars utilizing crate option must display CRATE on both front roof post. Must be contrasting in color from body and minimum 2” tall.

The Technical inspectors have the final say on all body work.

10.  TRANSMISSION: Bert, Brinn and Falcon type transmissions are permitted. Stock type transmissions shouldhave scatter shield or blow-proof bell housing. Automatics must be stock OEM cases and bell housing, an explosion blanket recommended.

11.  BUMPERS: Both front and rear bumpers should be loop style. Front bumper should be mounted to frame endwith bottom loop parallel to the ground. Bumpers should be made of minimum 1-¼ inch diameter tubing and must be able to support car if lifted by a wrecker. Rear bumper, nerf bars and bodies must not exceed beyond width of rear tires and must not contain any sharp edges. Rear bumpers may be constructed of tubing or flat stock and must protect fuel cell. Center of bumpers (front and rear) must be 18 inches (plus or minus 4 inches) from the ground. Rear bumpers are to be no wider than the body.

12.  REAR END: Any passenger car type, truck rear end or Quick change rear ends are allowed. No aluminumallowed except for lowering blocks, axle caps, and drive plates. No cambered rear ends (One piece drive flange only!) NO ALUMINUM DRIVE SHAFTS, Drive shaft must be white or orange. It is recommended that an inspection plug to be in the rear housing, ¾” minimum.

13.  STEERING: Steering box must be OEM. No rack and pinion. Must remain within original bolt pattern for type offrame used. In the cockpit, steering may be modified to suit driver’s taste. Steering must be kept on left side of cockpit; no center steering. All cars must be equipped with a removable steering wheel.

14.  RADIOS: RACEceivers are mandatory. No two-way radios of any sort.Track frequency 467.3625

15.  TRANDSPONDERS: Red AMB or MyLaps X2 Transponders mandatory.


A.    All engines used in competition must be able to be used in conventional passenger car without alterations. Motor mounts cannot be removed or altered. Castings and fittings must not be changed. No machine work on the outside of engine or on front or rear of camshaft. All blocks must be cast iron. Wet sump oiling system only and the pump must be in the pan.

B.    Any American make engine may be used as long as rear of engine (Bell Housing Flanges) is mounted at least 72 inches forward from the center line of the rear axle. Engine offset must be kept within 2 inches of

center line from cross member. Engine height: minimum 11 inches from ground to front center of crankshaft.

C.   Carburetor-2-barrel Holley 4412 only. BOX STOCK, NO MODIFICATIONS OF ANY TYPE! NO 4412HP or XP allowed

D.   Maximum 361 cu. in. for Chevy and Ford and 368 cu in for Chrysler.

E.    Cylinder heads Must be 23-degree for Chevy. Ford heads must be an inline valve style of head. The Chrysler W-2 head is allowed. All heads must be cast iron.

F.    Intake manifold can be 2bbl or 4bbl style. Adapter or spacer to be 1” thick maximum. Base gasket thickness to be .070 maximum.

G.   Camshaft to be flat tappet only. Stock lifter bore diameters and no mushroom style lifters.

H.   Ignition – HEI style only.

I.      Cooling system may be modified. Radiators and oil coolers must not protrude above interior.


A.    The General Motors (GM) Engine part number #88958602/19258602 is the only crate engine permitted

B.    The engine and all components must remain in their original configuration and form as purchased and/or delivered from the factory. Any alterations to the engine will not be permitted. The Engine must remain as manufactured by General Motors with a stock 4”-inch bore. Overbore(s) will not be permitted. Sleeve repair may be permitted with written permission from Freedom Motorsports Park Officials.

C.   All engines are to remain sealed from the factory. The original factory seals must remain unaltered, Tampering, removal, modifications of any type and/or broken factory seals will not be permitted. The GM Engine must remain unaltered in any way.

D.   The GM Crate Engine seals (bolt-type) must remain unaltered. Freedom Motorsports Park Officials may require specific sealing and verification of all seals on any GM Crate Engine. Tampering with and/or alteration of any seals will not be permitted and is subject to immediate  suspension and loss of points for the season.

E.    Only direct replacements for (GM) Engine part number #88958602/19258602 will be permitted for any type of replacement and/or repair work. Only GM Crate Engine specific valve springs may be used for replacement and/or repair, Part Number # 10212811.

F.    All cars utilizing crate option must display CRATE on both front roof post. Must be contrasting in color from body and minimum 2” tall.

17.  WEIGHT: All bolt-on weight must be mounted to chassis. Weights cannot be mounted to any movingsuspension parts including rear end housing. No weights added in driver compartment or outside of body. Weight must be painted white and have car # on it. Weight must be fastened with 2, 1/2” bolts minimum. Weight may not be attached to rear bumper. Car must weigh a minimum of 2400 pounds with driver, on track scales upon completion of race (heat, consi or feature). TRACK SCALES ARE OFFICIAL.

18.  WINDOW SCREEN: All cars must have a full window screen of substantial material with a maximum openingon individual holes at 1×1 minimum 16 gauge material recommended with 3 vertical bars in front of the driver minimum size 3/8” round solid bar. NO CHICKEN WIRE OR ALUMINUM. Screen must cover entire windshield area left to right across the cage and from top of cage down to hood or cowl.

19.  TRACTION CONTROL: NO traction control of any kind–mechanical or electronic. All wiring from distributor toignition switch or tachometer must be in plain view for inspection and have no splices or interruption in these wires. Tech officials will have the right to confiscate any part of the ignition system for further inspection. If parts are confiscated, prize money and points will be held until results of inspection are known. All legal parts will be returned. Violation of any of these rules will result in disqualification.

NOTE: The preceding rules and regulations are designed to provide for the orderly conduct of racing events andto establish minimum acceptable standards and requirements for such events. By participating in these events, all participants are deemed to have complied with these rules and regulations. No expressed and/or implied warranty or safety assurance shall result from publication of, or compliance with, the preceding rules and regulations. They are intended as a guide and are in no way a guarantee to any participant, driver or official, against injury or death. Any of the preceding rules may be subject to revision if it is felt that the changewould be in the best interest of safety or the Division. Track Officials have the right to make decisions and to rule accordingly, in the interest of safety, without recourse from drivers and/or owners. Track Officials will decide anything not covered in the preceding rules and regulations if, and when, it becomes necessary. OFFICIALS DECISIONS ARE FINAL.