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Late Model

2013 Huntsville Speedway Late Model Rules/Specifications

NOTICE: All equipment is subject to the approval of Huntsville Speedway officials. No equipment will be considered as having been approved by reason of having passed through inspection unobserved. Any
equipment which does not conform to specifications or tolerances contained in this rulebook, will
not be eligible for approval.

A. Eligible Cars and Bodies Guidelines

1. Body must be stock appearing, aluminum, fiberglass or metal.
2. Six and one-half inch (6 ½”) spoiler maximum.
3. Quarter Panel Height 35”
4. No under panning or grounds effects allowed. No Exceptions
5. Roof height minimum 47” / max 49”
6. No Down force Bodies
7. All body rules will comply with ABC Rule Book on all max measurements. Max, same as
ABC package. ASA Challenge series Camero and Mustang bodies are approved.
8. No panels allowed extending top edge of doors. No under car panning outside of frame rails
and no further than driver’s box front or rear.
9. All air for blowers or coolers in the engine compartment must be pulled from the nose
or the radiator air box.
10. Minimum Base Weight: 2750 lbs (see “Track Additional Rules” section for additional weight
breaks or penalties).
11. 58.0% Maximum left side weight at all times (without refueling). For post-race total weight
requirements, teams may refuel, or officials may utilize “1 lb. per lap” burn-off.
12. 66 1/2 inch maximum tread width for all tubular clip cars.
13. All cars must go through technical inspection prior to car taking to the track for practice.
Cars will be weighed with driver, and may be done prior to or after qualifying and prior to or after
the feature. Reading of designated scales will be official.

B. Engines

Basic Engine Guidelines

1. Engines with rear mounted distributors will be located so the forward most spark plug is
no more than two inches (2”) from the center line of the upper ball joints. Engines with front
mounted distributors: up to four inches (4”) setback from centerline of upper ball joints. Crate
Engines may use four inch (4”) setback.
2. Engines may not be offset more than one inch (1”) from centerline of car.
3. Front center of crankshaft must have at least ten inches (10”) of ground clearance.
4. Carburetor declared in tech cannot be changed for qualifying or feature event.
5. No Ford D3, SC, or other High Port heads. The following are the ONLY approved Ford
heads: A, B, C, C3, and C35. These heads must remain unaltered other than porting and
polishing.
6. Dry Sump permitted.
7. No Overhead Camshafts.
8. Any type magnetic steel rod – NO ALUMINUM ROD or TITANIUM ROD. 6.25 Max Length.
9. No vacuum leaks between intake valve and top of carburetor.
10. A maximum 16 inch (O.D.) air element and housing must be used.
11. Any competitor that finishes in the top 5 may be required, at their expense, to remove the
intake, heads, and/or oil pan for inspection purposes.

9:1 Compression Engine 362 Max Cubic Inches/Cast Iron Block
1. Cannot exceed 9.5:1 compression. Method of determining compression will be at the
discretion of Speedway Officials.
2. Minimum valve angle: GM-18 degrees; Ford 9 degrees with 4 degrees valve center; and
Mopar 12 degrees. (+/- 2 degrees).
3. Steel or aluminum cylinder heads.
4. Steel standard production crankshaft; balancing, lightening, stroking allowed.
5. Any camshaft, any steel lifter, any rockers arms. Gear drives allowed.
6. Steel or aluminum intake. No fabricated intakes. No material may be added to production
intake manifold to increase carburetor height. No welded on spacers or air deflection devices
allowed in the intake. No part of carb spacer shall enter the intake.
7. 390 CFM 4bbl Part #6895 or #80507. Carburetors must pass inspection at any time
regardless of temperature. Booster bar may be removed from center of booster (max inside
dia. of booster .473) and the booster may be tapered from the center seam down (booster must
retain .700 length minimum) but all 4 boosters must be the same style. No other modifications
are allowed on carburetors.
8. 1” Maximum spacer allowed but cannot extend into manifold.
9. See “Additional Rules” Section for weight requirement.

Steel Head Engine 362 Max Cubic Inches/Cast Iron Block
1. Any flat-topped piston may have valve reliefs. Piston cannot extend out of block.
2. Unaltered 750 CFM Carburetor–500 CFM Carburetor—Gauge Legal. Carburetors must pass
inspection at any time regardless of temperature. Carburetor spacer 1 inch max, no tolerance
allowed, carburetor gasket maximum of .070 each, carburetor spacer cannot extend into intake
manifold.
3. Cast or steel production crankshaft. Balancing allowed. Maximum 362 cubic inches.
4. Any flat tappet hydraulic or roller camshaft allowed.
5. No 14 degree heads allowed.
6. Multi-angle valve job allowed. Maximum depth of port matching is 1″ from machined surface;
grinding only, no polishing. Titanium valves and retainers allowed.
7. See “Additional Rules” Section for weight requirements

“Other Engines”
1. S.E.A.L. approved McGunegill and Hamner “Sealed Engines” may also be used. Any
tampering of seals or established construction of these engines is grounds for immediate
disqualification. The Sealed Engines must utilize the mandated 7600 rpm for the McGunegill
and the Hamner. Both engines must use the gauge legal, 750 carbs described in the steel head
section and Ford Motorsports M-6007-S374D sealed engine.
2. Crate engines may also be used. The following crate engines may be used (with no other
weight breaks, penalties, or deductions allowed): GM 410 horsepower crate engine – part
number 88958604, Ford crate engine – part number M-6007-D347 or McGunegill Ford part
number MEP 425 LM.
3. Must run Holley carburetor model # 4150, part # 805411 650 CFM 4-barrel. This carburetor
must remain box stock. You may change jets, air bleed jets, and power valves. No other
modifications of any kind will be considered legal. Engines must remain same as stock except
for updates and rebuilds. All tear downs, protest and inspections will refer to GM Crate Tech
rebuild manual. (Yellow Book). Champ Oil Pan #CP 106LTRB approved (NO weight penalty)
GM small style crate balancer approved (NO weight penalty). Aftermarket balancer approved
(NO weight penalty). May run 1” spacer under carburetor.
4. OPEN CRATE:390 CFM CARBURETOR– Carburetor spacer 1 inch max, no tolerance
allowed, carburetor gasket maximum of .070 each, carburetor spacer cannot extend into intake
manifold. 362 Cubic Inch Max—Flat Top Pistons, Valve Reliefs Allowed, Crate Aluminum
Heads Allowed ONLY, Crate Intake ONLY, Steel Production Crankshaft ONLY, Any Cam, Any
Rockers, Any Steel Lifters. Must have started out as an original GM, Ford, or Dodge crate
engine. Must run a 6900 RPM REV chip.
5. See “Additional Rules” Section for weight requirement.

C. Fuel System
1. Fuel samples may be taken at any time and tested. Alcohol, nitro-methane, nitrous oxide,
other oxygenating agents, other additives and/or fuels that contain masking agents
or oxygen are not permitted. Street-use pump gas is not allowed. Use of such substances or
additives will result in immediate disqualification and loss of points.
2. No electric fuel pumps or forced induction of any kind are permitted.
3. No icing or cooling of fuel system.
4. A fuel cell will be mandatory with a 22-gallon (U.S.) maximum. Fuel cell must have a
minimum of eight inches (8”) ground clearance. Fuel cell must be equipped with at least two (2)
protective straps completely around the cell. Fuel cell must be mounted securely behind the rear
axle of the car. 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. All
cars must have safety bar at the rear of the fuel cell.

D. Ignition
1. Battery powered ignition. Vehicle MUST start under own power.
2. Maximum 16 Volt Battery. Car must be capable of being started with a 12- volt battery. No
Magnetos.

E. Suspension
1. No fifth (5th) coil, or lift bar suspensions will be permitted. No birdcage setups of any kind (3
or 4 link).
2. No cockpit, driver adjustments, other than brake bias.
3. Coil Springs and Spindles must be Steel. (Unless using the approved Coleman Spindle).
4. No traction control devices, electronic or otherwise, will be permitted. Use of traction control
will be cause for immediate disqualification and/or suspension from future racing activities.
5. One shock per wheel. Shocks must be only mechanical in nature and no part of suspension
or shocks may utilize electricity.

F. Wheels and Tires
1. Steel 10” wheels only. Tires will be the Hoosier F-40.
2. Use of tire softening or altering agents will not be permitted. Use of such substances will
result in immediate disqualification, loss of points and money.

G. Transmission, Driveshaft, Rear End
1. Full standard type transmission only will be permitted. No quick-change transmissions will be
permitted. Automatic transmissions will not be permitted. No Bert or Brinn type transmissions
allowed.
2. A minimum of one reverse and two forward gears will be required.
3. Multi-disc clutches will be permitted. No direct drives. Conventional clutch mounted to fly
wheel only will be permitted. Any transmission that does not meet these guidelines may be
assessed a minimum 25 lbs penalty.
4. No carbon fiber or nonstandard material clutches.
5. Driveshaft must be equipped with a minimum of two (2) safety straps. Drive shafts must be painted white and
made of Aluminum or Steel only, and use no other materials (i.e. carbon fiber, etc).

H. Brakes
1. Vehicle must be equipped with four-wheel hydraulic brakes.
2. No carbon fiber rotors. Only steel rotors are allowed (no titanium).
3. Brake fluid circulators permitted. Liquid or gas cooling not permitted.

I. Safety
1. Radio communication to the drivers is mandatory, with a minimum of one (1) spotter for each
team.
2. Approved seat belts and double shoulder harness will be required, no older than three (3)
years. A crotch strap will be required.
3. Helmet must be 2000 Snell standard or better and have sticker visible for inspection.
4. Clean full driving suit for fire protection will be mandatory, along with approved racing gloves.
5. Side plate for driver’s door will be mandatory. Must be 12 inches (12”) high post-to-post, 1/16”
minimum thickness steel or and must be fastened with a minimum of six (6) half-inch bolts or
securely welded to series’ approval.
6. Driver’s window must be equipped with safety net with quick release-latch.
String window nets will not be permitted. When latched, the window net must fit and pull tight.
7. Resilient padding designed for roll bar use must be installed on any roll cage member which
can be reached by any extremity of the driver while driver is normally seated with restraints
fastened. Steering wheel must be padded.
8. All lead weights must be painted white, with the car number painted on each individual
piece. All lead weights must be securely fastened. No lead weights will be permitted in driver’s
compartment. Any lost weight will result in a $10 per pound fine. No Tungsten or similar weight
allowed!
9. A main electrical cut-off switch needs to be clearly marked and easily accessible to safety
crews.
10. Main Frame rails must be a minimum of 2” x 3” rectangular steel.
11. No part of any cooling system may be located in driver’s compartment
12. Batteries must be securely fastened and mounted outside of driver’s compartment.
13. A working Fire Suppression system required.

J. OFFICIAL DECISIONS
1. Any situation not specifically covered in these rules will be acted upon by the Huntsville Speedway official or
officials in charge at the time, whose decision will be final and binding on all participants.
2. Any disagreement over technical questions or operations will be resolved by Huntsville Speedway officials.
When decision is rendered, decision is final and binding.
3. Continuous developments in racing may necessitate changes which cannot be anticipated at
the time rules are formulated. If necessary, rules may be updated, changed, deleted or added to
at the discretion of the Huntsville Speedway officials.
4. Huntsville Speedway Official’s decisions are final.

K. PROTEST
1. All protest must be filed no later than 15 minutes after display of checkered flag of that
event. No exceptions!
2. All visual protest must be filed no later than the start of the division race before the event for
which the protest is made. No exceptions!

PROTEST TERMS RULE
1. Protest must be at scales immediately after the feature. Once protest is filed, it will not and
cannot be withdrawn.
2. When protest and found illegal, you will lose all points and monies for that night. If you admit
to being wrong and don’t tear down, you lose all points and monies for that night and will be
issued a fine in the amount of $50.00. Each additional time you are protested and found wrong,
the fine will increase by $50.00 and you lose all points and monies for that night.
3. When protesting, you must also tear down first. All protests must be made at scales
immediately following that division of racing.

PROTEST COST
1. $2,000.00 to look at everything on engine. $1,500.00 to look at top half only.
Protester must tear down first. Speedway keeps 30%, win or lose.

L. Additional Rules Section
1. Minimum fuel purchase required at each event.

Weight Requirements
1. 9:1 Compression Alum Head with 390 CFM-four barrel must weigh 2750 pounds.
2. Steel Head Engine with 750 CFM-four barrel must weigh 2750 pounds.
3. Steel Head Engine with 500 CFM-two barrel must weigh 2750 pounds.
4. S.E.A.L. Engine with 750 CFM-four barrel must weigh 2750 pounds.
5. Crate Engine with 650 CFM-four barrel must weigh 2750 pounds.
6. OPEN Crate Engine with 390 CFM-four barrel must weigh 2750 pounds.