02/06/2023
2023 American
Dirt Racing League
Late Model Rules
Engine Option A.
GM Sealed 604 Crate Engine
(Must be as comes from GM, no modifications to any external parts, must run 1.5 GM equipped Rockers, etc.)
New GM Cap Style Seals, or CRUSA Seals only. No generic “crate” labeled, rush, IMCA or Fastrak seals.
Any engine that has 185lbs of cranking compression on any one cylinder will not be permitted to be used as a “sealed crate engine “ at tri-county speedway.
May run 2” carb spacer with sealed engine.
2300 lbs minimum weight at all times.
No Rev limiter chip mandated.
Engine Option B.
5.3 LS (327 cubic inch) OE Production Cast iron or Aluminum Blocks.
Stock GM Blocks only, no after market blocks(dart, Brodix, etc)!
◦ Bore/Stroke: 3.800 in. x 3.622 in.
* Displacement: 5.3L
Rotating Assembly:
* Crankshaft: OE GM steel crankshafts only, no lightened cranks, or aftermarket crank shafts.
* Rods: Stock GM LS rods only.
* Compression Ratio: 10.0:1
* Pistons: may run any 2 or 4 valve relief flat top piston.
Camshaft Specs:
* Camshaft: Hydraulic roller tappet
* Cam Duration @ .050 in.: Intake 222 / Exhaust 231
* Cam Lift: Intake .545 in. / Exhaust .545 in.
* Lobe Separation Angle: 112
Cylinder Head Information:
* Cylinder Heads: OE aluminum
* Combustion Chamber: 64 cc
* Valve Size: 2.000 in. Intake / 1.550 in. Exhaust
* Rocker Arms: Powdered metal roller rockers 1.7 ratio with C-clip upgrade retainer permitted.
* MSD 6014CT Circle Track GM LS Engine Ignition Control only with this engine package! Must run Factory settings as come from the manufacturer, any attempt to program the box or adjust timing curve, etc, will result in confiscation and resetting of your ignition control box.
* 1inch Carb Spacer
* Any 4 barrel Carburetor
* Pump gas only, Maximum of 93 octane only.
Must weigh 2400 lbs at all times.
Engine option C
Built Small block ONLY stock production steel V-8.
B.) 360 cubic inches maximum Ford and Chevrolet. 374 cubic inches maximum Dodge/Chrysler.�MUST utilize stock bore and stroke combinations. Small block engines ONLY.
C.) .060ths over bore permitted on all engines. Block may be surfaced. Pistons may not exceed�top of block more than one 10th. Measured without head gasket.
D.) Stock steel rods or stock type steel rods.
Eagle H-Beams rods permitted, but no other H-�Beam rods allowed. MUST be stock length to the engine. (EX: 350 Chevrolet 5.7″ maximum length). No titanium, aluminum or exotic material permitted. Ford and Mopar 6” rods permitted.�E.) Steel or cast factory production crank shafts ONLY. 48 lbs. minimum weight. Casting number must be plainly visible. Cranks must be stock stroke to engine. (EX: 3.48″ maximum for�350 Chevrolet) NO knife edging. Eagle or S**t crankshaft OK must meet above rules! Ford crankshaft must weigh 54 lbs.�F.) No dry sump oiling systems
G.) Engine balancing permitted.
H.) Chassis type collector headers ONLY. Tri-Y headers permitted.�I.) Any flat top piston. 2 or 4 valve relief piston permitted.
J.) .550 max lift flat tappet camshaft permitted No roller camshafts . Lifters must be stock diameter.
Cylinder Heads
A.) Any steel head meeting the following requirements
1. Chevy 23 degree head + or – 1 degree with no larger than a 1.94” intake valve�2. Ford 20 degree head + or – 1 degree with no larger than a 2.02” intake valve
2. Mopar 18 degree head + or – 1 degree with no larger than a 2.02” intake valve
B.) Angle milling of heads OK.
C.) Multi angle valve job permitted. NO porting, polishing, squaring, or epoxying of ports.�D.) Valve size Chevrolet 1.94”, Ford or Mopar 2.02″ intakes and 1.65″ exhausts max.
E.) Stainless steel valves permitted.
F.) Screw in studs and guide plates permitted.
G.) Roller tip rockers. Aluminum rockers and stud girdles permitted. No shaft mounted rockers.�H.) Any valve retainers . Any spring permitted.
I.) Gen 1 and 2 604 Crate engine aluminum heads permitted.
Intake Manifold
A.) Any aluminum or cast iron intake.
B.) NO porting, polishing, or epoxying of runners permitted.�C.) 1″ carburetor spacer allowed.
Carburetor
Any four barrel carburetor is
allowed.
Must Weigh 2400 Lbs at all times.
Engine Option D
Self Repaired 604 Crate engine
Must be repaired and rebuilt back to GM 604 crate engine Specs, Stock replacement 5.7 rods are okay,
Eagle part -5700B3D H Beam 5.7 length Rods are permitted,
must use GM OE 604 Crankshaft, or Eagle part / S**t part #942-910526 crank shafts permitted.
After market 2 or 4 valve relief piston okay, no domes, no modifications of the crank shaft(knife edging, etc).
No port matching of the heads and intake, no aftermarket valve train components, must use GM parts only.
Aftermarket Camshaft permitted, must meet GM Lift, Duration and lobe seperation angle specs for a 604 Crate engine.
May run 2 inch Carb Spacer.
Minimum Weight 2400 LBS at all times.
Ignition Systems :
The following ignition boxes will not be legal for use at Tri-County speedway or any future ADRL Late Model Series events.
-MSD Red 6 Box (Part No. 6530)�-MSD Black 6 Box (Part No. 65303)�-MSD Gold 7 Box (Part No. 7531)�-Fast Ignition (Part No. 307222)
One Ignition box per car, one Battery(Max 16 volt) per car.
Body Rules:
1. Crate Racin’ USA body rules will apply. See 2022 Body Diagram/Specifications for further body specifications.
2. No raised or gurney lips of any type allowed on body.
3. Doors and quarters must be flat or may have an outward roll. No doors or body panels allowed to be rolled inward.
4. No tunneling of any type allowed underneath body, along frame, or around fuel cell area.
5. Stone shield for remote oil filter or transmission is allowed. 24” x 24” maximum, located near rear engine plate.
6. Spoilers
a. 8” maximum spoiler. Must be made of solid material such as Lexan, sheet aluminum, or material of equal strength.
b. Spoiler and spoiler supports should be made of equal material and size on all areas.
Fuel. NOTE: LS Engines must run pump gas ONLY. The following fuel specifications only apply to crate/built 362 small block engines.
1. An approved fuel cell, 32 gallon maximum, must be securely mounted in the trunk area of the car, inside a .20 gauge metal
box supported by a minimum of 2” x 1/8” steel straps.
2. Fuel cell must be completely visible from rear of car.
3. Gasoline, Racing Gas, or E-85 fuel allowed. No methanol or alcohol. None of the following chemicals are allowed in any fuel
used for competition: No nitrous oxide, propylene oxide, nitroethane, MTBE, hydrazine, or ethylhexanol.
a. Gasoline or Race Gas – specific gravity NOT to exceed .744 at 60 degrees. Any gasoline or race gas with a specific
gravity of .745 or greater will be disqualified. Fuel is subject to testing on site, or fuel samples may be taken and
sent to an independent lab for testing.
b. E-85 – specific gravity not to exceed .7855 at 60 degrees. Any E-85 with a specific gravity of .7856 or greater will be
disqualified. Fuel is subject to testing on site, or fuel samples may be taken and sent to an independent lab for
testing.
c. It is the competitor’s responsibility to know what’s inside their fuel cell.
Fuel protest fee, $150. Must finish in the top, and must lodge the complaint with the tech official within 5 minutes of the completion of the race. Note: protesting party must also surrender a fuel sample.
Tires:
Hoosier 1600, D55 or WRS-2 55 mandated on the right rear at all times.
Hoosier 1350, CRUSA D21 allowed on Left Front, Left Rear, Right front.
Grooving and siping allowed.
Chemical alteration of any tire is strictly prohibited, tires may be sampled at given point and time during an event for testing. Refuse to give us a sample? Then we refuse to allow you to race for that night.
Any competitor who fails a tire test must sit out two races and pay a $400 fine to return to competition.
Tire Protest Fee, $150. Must finish in the top 5, and lodge protest with the tech official no later than 5 minutes after the conclusion of the event. Note: protesting party must also surrender a sample.
Engine Tear Downs, Buy-outs, Etc.
Any competitor who wins Three race events in a row will be subject to removal of intake, No less than one head, and the oil pan for inspection on any engine.
If the engine is legal, the track will compensate a sealed engine racer with the means to have engine resealed. On built motors, the track will provide gaskets.
Any sealed engine found to be in violation of the rules will be marked, and not be eligible for use as a crate engine any longer at TCS or ADRL events.
Engines may be claimed as follows:
Note: unsealed engines will not have to surrender the intake manifold.
All engines will come less carb, distributor, water pump, fuel pump, pulleys or headers.
-$8000
Limit one claim per team, per season, no counter claims, claims must be made no more than five minutes after the conclusion of the racing event, claiming team must finish in the top five.
Claim money will be held, the claimed engine must be marked by series officials and then removed. The engine that is being claimed will then be inspected externally and internally to ensure that the engine is legal for use. If the engine is found to be illegal, monies paid by the protesting party will be returned to them and the competitor owning the illegal engine will be disqualified for that event.
Anyone that refuses engine claim, or tear down will be immediately disqualified, and must sit out one race weekend before returning to competition, engine will be subject to inspection before competition begins that evening.
Protests of the following items must be made no more than five minutes after the conclusion of the evening Feature event, competitor that is protesting must finish in the top five.
The items, and fees are as follows:
$400.00 One Head (No valves will be pulled) $300.00 Oil Pan
$100.00 Engine Setback (1” inch tolerance)
$100.00 Ignition System.
Suspension and Shock absorbers:
Shocks at any position on the car, including lift bar and torque arm shocks, must be constructed of magnetic steel or
aluminum.
2. Shocks of the “thru-rod” style are NOT permitted.
3. Remote reservoirs are permitted.
4. Each shock may have a maximum of three (3) external adjustment mechanisms. External reservoir may only have one (1)
external adjustment. Adjuster mechanisms may not be hidden by the rod end. All adjusters must be located on the shock
body, on the shock rod, or on the remote reservoir. Cockpit adjustable shocks NOT permitted.
5. No electronic adjustment whether hard wired or wireless. Remote nitrogen gas cannister will be permitted. The remote
adjuster may contain compression adjustment.
6. Shock/Damper devices that are or can be referred to or defined as an “inerter” or referred to or defined as a “j-damper” are not permitted anywhere on the car.
7. All official’s decisions are final. Rules can and may be adjusted in order to maintain fairness. New or updated devices or suspension parts should be approved before use in competition.
Wheelbase Rule:
1. 103” minimum wheelbase.
Roll Cage Rules:
1. All cars must have a suitable and deemed safe steel roll cage protecting the driver’s compartment, including headrest.
2. Side roll bars are mandatory and must extend into the door panels. A minimum of three (3) bars must be on the left side.
3. Each bar must be at least 1 1/2" in diameter, with a minimum material thickness of .083”.
4. Roll cages must be welded to frame.
Transmission Rules:
1. Must have at least one forward and one reverse gear in working order.
2. No straight drives or in and out boxes.
3. Drive shafts must be painted white for safety.
4. Carbon fiber drive shafts are legal.
5. Ball spline transmissions strongly recommended to run carbon fiber drive shaft only for safety.
Brake Rules:
1. Steel brake rotors only.
2. No carbon fiber, titanium, or other exotic material brake systems allowed.
Miscellaneous:
No mirrors, no external two way communication devices, no crew to driver one way communication devices (radios) permitted. Race Recievers are mandatory.
No illuminated spotter or signal sticks allowed.
No traction control devices allowed.
Electronic engine rpm control type devices will be looked for as well as braking induced systems. Any competitor found with a traction control device will be disqualified for that event, and have points for to that point in the season stripped.
A $500 fine must be paid by any competitor found using a traction control device before they can return to series competition, a minimum two race suspension will also be placed on that driver/owner.
Any subject not covered or yet encountered in this rule book will be met with actions needed to remedy any situation at the discretion of TCS or ADRL series officials. Their interpretation of the rules will be the only the only permitted interpretation.
