Pro Late Model Rules 2012

Effective July 7:  Pro Late Models are required to have the Crane Ignition Box.


All specified weight requirements will be with gas, oil, water and driver prior to racing.

1. Minimum weight 2750.

2. Maximum left side weight will be 58.0 percent at all times without fueling.

3. Added weight must be in block form of no less than five-pound blocks (no pellets). Added weight must be securely bolted in place. Dislodged weight cannot be returned to car for weighing after race. All added weight must be painted white with car number in red or black. Any lost weight will result in a $10 per pound fine to the Driver.


1. GM # 88958604 with the following updates, 1.6 rocker rocker arms, Valve Spring Part # 12586484 from Phil Harper, Comp Cam valve springs #941-16, Champ oil pan # CP106LTRB and Balancer.

2. Ford # M06007-D347-SR with 1.5 rockers.   

3. McGunegill Ford # ASA 425LM with 1.5 rockers.

4. 350 2 BBL, 2775 pounds

All sealing bolts must remain as installed from factory. Removal of sealing bolts will result in disqualification.

Only the top five drivers finishing a race, their crew chief or owner may claim a crate engine from a driver finishing the race ahead of the claiming Driver. The claim will be limited to one car and must be made within 10 minutes after completion of the feature event with the cash only claim fee to the Race Director or Chief Pit Steward. The claim fee will be the current price of the crate engine Plus $100. The fee will be distributed to purchase a new crate Engine for the driver being claimed plus a $100 pulling fee. Not included in the claim are carburetor, water pump, distributor and pulleys. A claim fee will not be accepted should Speedway Officials determine the claim fee has been made on someone else behalf or the fee is from more than one party. Failure to pull and sell a claimed engine will result in the driver being claimed forfeiting all purse and points for the event and all track points for the year. The driver must also pay a $1,000 fine prior to being allowed to compete again at Speedway.

1. Displacement, maximum 362 CID, V8 only.
Block, Cam Shaft and Lifters
1. General Motors, Ford or Chrysler cast iron small block only. Four-bolt mains permitted with steel caps. Plugs may be used in block for strength only; plugs may not be higher than block surface.
2. Solid lift cam and lifter permitted. No roller tappet cams or lifters permitted.
3. Wet, dry or accusump oiling systems and racing oil pans permitted.
Crank, Rods and Pistons
1. After market steel crank permitted with stock stroke +/- .020”. Chevrolet 350 may use a 3.480” stroke steel crank. Ford 302 may use a stroked steel crank, stroke is not specified.

2. Stock-appearing after-market steel or steel billet rods and “H” beam rods permitted at any length, no titanium rods permitted. Polishing or machine work not permitted on rods, except for balancing.
3. Flattop pistons only.
Cylinder Heads
1. Only cast iron, 23 OEM type heads permitted. Angle cut, angle plug, dart type, high compression or 300 H.P. Chevrolet heads allowed.
No SB 2 or SB 3 heads permitted.
2. No polishing. porting, or matching of ports allowed in any manner.
3. No extra pins in heads. Ford head may be posted with stiffners on intake side of head.
4. O-rings permitted in Ford head or block.
Rocker Arms
1. Adjustable after-market, roller rocker arms and shaft rocker arms permitted.

2. 7/16” screw-in studs and guide plates permitted. Studs may be pinned. Stud girdles permitted.
1. Maximum valve size: Chevrolet and Chrysler intake 2.05”/exhaust 1.600, Ford intake 2.02”/exhaust 1.60”. Neck down valves permitted. No titanium valves. Maximum under size .010th.
2. Racing valve job permitted with maximum of 3 angles on valve seat and valve face permitted. No blending valve job to casting in head.
Intake Manifold
1. High performance cast-iron and aluminum intake manifolds permitted. Speedway Officials must approve intake manifolds.

2. No altering, polishing, porting or matching of ports allowed in any manner. No laser treating or micro holes allowed. Plenium may not be altered and no devices are permitted inside runners.
3. Stuffer permitted in Ford and Chrysler intakes.
1. General Motors, Ford crate engine - Holly 650 HP 4150-80541 four-barrel. No alterations
2. Holly 2300 two-barrel number 7448.
3. Body of carburetor - no polishing, grinding, or drilling of holes permitted. No paint or any other type of coating other than from carburetor manufacturer allowed inside or outside of carburetor.
4. Choke and choke horn may be removed, but all screws must be permanently sealed.
5. Booster can be tapered below center line and center bar can be removed. Total booster length .700", center hole in booster cannot exceed .470.
6. Venturi area must not be altered in any manner. Casting ring must not be removed.
7. Base plate must not be altered in shape or size.
8. Stock butterflies must not be thinned or tapered. One idle hole may be drilled per butterfly. Screw ends may be cut even with shafts, but screw heads must remain unaltered.
9. Throttle shafts must remain standard and cannot be thinned or cut in any manner. No silicone or epoxy allowed on throttle shafts.
10. Any attempt to pull outside air other than down through venturis is not permitted.
11. A minimum of two return springs is required. Throttle stops recommended.

Carburetor Spacer

1. GM Crate Motor spacer Maximum height 1" Aluminum with 1 paper gasket per side not to exceed .065" in thickness.  Open or 4 hole type allowed or VDL tapered spacer only. McGunegill Ford and Ford # M06007-D347-SR  will not be allowed to run any spacer.

2. Built Engine Only one non-adjustable one-piece solid aluminum carburetor spacer permitted, maximum ” in height, with 1 paper gasket per side not to exceed .065” in thickness. Spacer must have two holes with openings cut perpendicular, matching carburetor base, and no larger than base of carburetor. No taper or beveling permitted.

Air Cleaner

1. The only approved cold air box is manufactured by Five Star or ARP and it must have proper part numbers. NO carbon fiber boxes.

2. Air cleaner cannot be removed at any time during competition or practice.

3. Element may not be sprayed or soaked with any type of chemicals or liquids.

4. Nothing may direct or control the flow of air inside the air cleaner housing except the air cleaner element.

5. No sheet metal heat shields or any other type of hot air deflection device or airflow deflection device allowed past the backside of the radiator or in engine compartment.

Exhaust Manifold

1. Any type single flange steel tubular header permitted. Exhaust system must exit behind driver. If exhaust exits through the door, installation must include an exhaust flange that is mounted flush to the door. Exhaust pipe must not protrude through door.

Engine Placement

1. Measured from the center of #1 spark plug hole to the center of the top ball joint with in " tolerance. Chevrolet – 4", Ford 4".

2. Engine must be in center of frame with 1" tolerance.

3. Center of crankshaft to ground clearance 10" with tolerance.


1. Must have transmission with at least two forward and one reverse working gears. Jerico type transmissions permitted.

2. No Rankin or direct drive type, quick-change or automatic transmissions permitted.


1. Multiple disc clutches with steel floaters and pressure plates permitted, minimum 5 " in diameter. Solid magnetic steel clutches and pressure plates only. Clutches must be positive engagement design.  Slider or slipper clutch designs are not permitted.  No carbon fiber clutches.  Clutches found not to meet this definition will be deemed illegal.
2. Clutch housing assembly or cover may be made of steel or aluminum.


1. Aftermarket, homemade and -ton spindles permitted. Must be steel only or approved Coleman spindle.


1. Front and rear disc brakes mandatory. Any caliper permitted.

2. Only cast steel rotors permitted. Rotors must maintain a minimum of " thickness and cannot be drilled or slotted completely through.

3. No carbon fiber, fiberglass or titanium brake parts allowed.

Brake Cooling

1. All air intakes must be routed either from the nose of vehicle or air box only. Two hoses per brake, with a maximum 3" flexible hose to the brake.

2. Brake fluid circulators permitted. Liquid or gas cooling not permitted.


1. Breaker less, or dual point systems permitted. Ignition booster, racing coils or high performance ignition wires permitted. No magnetos or crank trigger ignition systems.

2. Alternators permitted.

3. One battery permitted. Maximum 16 volt and mounted securely outside of drivers compartment.

4. All wiring must be sealed. No unplugged wiring.

5. MSD ignition 6 series systems or Crane HI-6RC Ignition (part # 6000-6700). One ignition box only and must be mounted on dash area in plain view out of reach of driver.

6. No traction control devices, electronic or otherwise, will be permitted. Use of traction control will be cause for immediate disqualification and suspension from future racing events.

7. Crates Mandatory 6300-RPM chip (except GM # 88958604 is 6500) and Built engines 7000-RPM chip. Rev Limiter must be in working order and tie wrapped and taped in place.


1.10”Racing steel wheels only.

2. No Air bleeders permitted.



1. Designated Hoosier Tire Only. No soaking or altering of tire in any manor allowed. Drivers soaking or altering tires will forfeit all purse and points for the event and all track points for the year. Driver must also pay a $1,000 fine prior to being allowed to compete at Speedway. Any illegal tire, in the judgment of Speedway Officials, will be confiscated.

2. Maximum tread width allowed is 66” (No Tolerance). Tread width is measured from the left center of tire to the right center of tire. Spacers permitted.


1. Racing shocks permitted. One shock per wheel. Adjustable shocks allowed.

Rear Ends

1. Quick change and open tube rear ends permitted.

2. No Independent rear suspension. Cambered rear ends permitted 1.5 degree maximum.

3. Damper shocks permitted.

4. No Titanium Axles.

Fuel System/Cell

1. TRACK FUEL REQUIRED. MINIMUM PURCHASE REQUIRED AT EACH EVENT. This will be the only fuel permitted to be used and must be unaltered. Fuel samples may be taken at any time and tested. Alcohol, nitro-methane, nitrous oxide, other oxygenating agents, or other additives are not permitted. Use of such substances or additives will result in immediate D.Q.

 2. Manual, block mounted stock type fuel pumps only. No electric fuel pumps.

3. No icing, Freon type chemicals or refrigerants may be used in or near the fuel system or engine compartment. No cooling of fuel cell or fuel system.

4 Fuel cell mandatory, maximum capacity 22 gallons, vented with maximum 1" vent to outside left rear of body.

5. Fuel cell must have a minimum of two, made of 1" square tubing, protection braces wrapping around fuel cell from front, underneath and to back of cell and a rear protection bar of 1.75" tubing extending below the rear of frame and at least " below the bottom of fuel cell to cover the width of the fuel cell. Minimum ground-to-fuel cell 8".

6. Cars must have a minimum 1/8” steel plate, or similar strength aluminum plate, between fuel cell and rear end.  A similar plate at the rear of the fuel cell is recommended.


1. Car must start under its own power.

Cooling System

1. All cars must have catch can or hose to exit at windshield.

2. Water only must be used in cooling system. Any additive to water, i.e. Water Wetter, must first be approved by a Speedway Official. Any driver found using unapproved coolants must pay a $100 fine before driver can compete at Speedway.


1. Steel Coil over or bucket type springs permitted only. No titanium. One spring per wheel.


Refer to CURRENT ABC Rulebook for all body rules

At all times, the ABC “A” measurement must maintain a min. length of 11.5 inches. Also, 20 inches is the min. length allowed for the nose, measured from the bottom, leading edge at center, up to the hood seam.

No panels allowed extending top edge of doors. The car body must be acceptable to Speedway Officials at all times. No car will be allowed to start a race without a full body.


1. Car interior must be complete and shield driver from ground, engine compartment and fuel cell area. Firewall must be no less than 24-gauge metal and fully seal driver from engine compartment.

2. Car may have an installed dash panel with optional gauges. No digital gauges permitted. No in-car timing devices during competition.

3. ON-OFF switch must be located on dash within easy access of driver as well as access from outside left window opening. ON-Off positions must be clearly marked.

4. Quick release steering wheel is mandatory. Center top section steering post must be padded with at least 2" of padding material.

5. All roll bars surrounding driver must be padded. Padding must be acceptable to Speedway Officials.

6. A window net must be installed in the left side door glass opening. The window net must be a rib type, made from nylon material with a minimum 1" square opening between the ribs.

The minimum window net size shall be 22" wide by 16" high. All window nets must have quick release mechanism and be welded to roll cage. The window net, when in the closed position, must fit tight when secured.

7. Rear view mirror permitted inside of car only.

8. Approved helmet and fire suit and gloves required any time vehicle is on racing surface.

9. Head and neck restraint will be mandatory.


1. Straight rail, perimeter and OEM front clip frames permitted.

2. No chassis adjustment from inside car except for brakes.

3. Frame and roll cage, including weight box, must be inside of left front and left rear tires.

Roll Cage

1. Speedway Officials must approve roll cage designs. Round steel tubing 1 " OD round tubing by .090" minimum wall thickness must be used to construct roll cage. Roll cage should be box type with a cross support in the back and a minimum 9" upright support at the left front support.

2. Left door must have four bars and must have 1/16" minimum steel plate on all door bars.

Drive Shaft

1. Steel or Aluminum drive shaft only. No carbon fiber wrapped in aluminum.

Drive shaft must be painted white or silver.

2. Minimum one 360 degree loops, 1" x 1/8" steel.

Sway Bars

1. The main body of the front sway bar must be made of steel and may be splined for attaching to the main body. Helm joints may be used for attaching the sway bar arms to the lower control arms.

Late Model Rule Enforcement

1. The Chief Tech Inspector shall be authorized to make changes from any specification contained in these rules as a situation may dictate. Furthermore, the Chief Tech Inspector may impose further restrictions in an attempt to maintain fairness. Under no circumstances may the Tech Inspector alter any safety rule to less than stipulated.




A. Only drivers may protest. Protesting drivers and protested cars must have finished in the top five and be on the lead lap. All protests must receive an approval of the pit officials. Spite protests and unsportsmanlike-like protests will not be accepted.

B. All protests must be submitted to pit officials in writing within 10 minutes of feature race completion, and be accompanied by $250.00 CASH. The driver who wins the protest will receive $225.00.

C. Driver can only protest three times in one season and must wait three weeks before protesting again.

D. Drivers or cars found illegal forfeits all points and moneys earned for the entire race meet.

E. Refusal to comply with protest or to tear down when instructed by Speedway officials will result in a fine equal to protest amount, an automatic two race suspension and loss of points and moneys earned for the evening. Upon returning to competition driver must agree to tear down after racing events for free.