2013 LIMITED SPORTSMAN
The Limited Sportsman Division combines two types of cars for exciting racing at the Antioch
Speedway. The class allows for more modifications to the engines and suspensions of the vehicles
than the Renegades Division. The “A” Class cars are stock appearing American made, rear wheel
drive automobiles. The “B” Class cars are tubing chassis cars with a stock front snout. “A” CLASS
SPECIFIC RULES: GENERAL: Open to any stock appearing American car. Must be rear wheel drive
only. No trucks, jeeps, or station wagons.
BODY: Must have complete front and rear firewalls and floor pan in steel only. Firewalls do not
have to be in stock location. Floor pan must be in stock location. Rest of interior may be boxed in
using steel or aluminum. Cars with boxed in interior must have a 12” x 12” removable inspection
panel to check enclosed area. All interior panels must be sealed to prevent fire, oil, or fuel from
entering cockpit. Body must be in stock OEM location on frame and cannot be channeled over
frame. Body and chassis must be of same manufacturer. After market tail and nose sections are
allowed. After market bodies are allowed. Body can be fabricated from steel or aluminum, but must
retain original body lines. Cannot exceed stock dimensions. Must run with hood at all times unless
crash damage prevents it. Rear spoiler is allowed, 6in. maximum height. Width cannot exceed top
corners of the quarter panels. Side spoilers are allowed and can be no larger than 6in. high and
12in. long, A 4in. debris deflector is allowed in front of driver. Uni-body cars may be reinforced in
critical areas including x-bracing in floor. Uni-body cars may use 2 x 3 x .095 tubing in rear to
replace damaged OEM frame rails. New rails cannot extend any farther forward than the front leaf
spring mounts. May use frame ties. All vehicles must run stock wheel base for type of car being
raced, plus or minus 1in. All vehicles must have roll cage .
CHASSIS AND SUSPENSION: Steering must be stock type in OEM position, no rack and pinion.
Steering quickeners are allowed. All suspension mounting points, front and rear, must be in stock
OEM location except upper “A” frame mounts which may be moved. Lower front “A” frames must be
stock and unaltered. Upper “A” frames may be tubular steel or modified stock. Front springs must
be 5 inches minimum diameter and may use threaded spacers or screw jacks. Shocks may be
moved out board of “A” frames. Rear springs must be 5 inches diameter minimum and may use
screw jacks. Rear trailing arms must be OEM stock and may be reinforced. Upper trailing arms may
be modified for pinion angle. Mono-ball type bushings allowed. All springs must be in stock
locations. Shocks may be any steel, nonadjustable type only. Rear shocks may be moved. Leaf
spring cars may use adjustable shackles. Adjustable lowering blocks and sliders are not allowed.
“B” CLASS SPECIFIC RULES GENERAL: Open to cars that use a tubing chassis with a stock front
snout. BODY: 101in. minimum wheel base. Bodies may be fabricated or may be after market, but
must be same make from nose to tail. Stock appearing nose and tail sections must be used. Floor
pan and front and rear firewalls must be fabricated of steel. All other interior panels may be steel or
aluminum and must be sealed to prevent fire, oil, and fuel from entering cockpit. Hood must be run
at all times unless crash damage prevents it. Rear spoiler must be no higher than 6in. and can be
no wider than the width of the rear of the car. 6in. high x 12in. long side spoilers can be used. A 4in.
high debris deflector may be used in front of the driver.
CHASSSIS AND SUSPENSION: Stock front snout must use a stock lower “A” frame in the stock OEM
position. The upper “A” frame may be stock type or tubing and mounting position can be changed.
Shocks may be mounted outboard of the “A” frames. 5 inch minimum diameter springs may be used
and must remain in stock position. No coil-overs. Steering must be factory type that came on front
snout being used. Steering quickeners are allowed. Rear suspension may be any stock type with
the following exceptions. No independent rear suspensions and no after market late model type 3
or 4 links. No coil-over springs and shocks or coil-over eliminators. 5 inch minimum diameter
springs may be used. Spring sliders may be used. No Reece Bars, lift bars, or 5th arms. No shocks
on top of rear end housing. Any leaf spring can be used. Shock mounting is open. Any steel non-
adjustable shock may be used. Heavy duty ball joints and steering components are allowed. Leaf
spring cars may use adjustable lowering blocks, shackles, and sliders. Solid control arm 3 or 4 link
rear suspension is allowed and may use one Quick Car #66-500 biscuit bar with unmodified Red
biscuits only. Control arms must be steel and may be threaded with Heim joints. Must use a full
length panhard bar, with a minimum length of 32 in., measured from center to center of mounting
holes. Panhard bar must be mounted behind rear end housing. No "J" bars allowed. All suspension
mounting points on the chassis must be solid and non-moving. Leaf spring cars may “float” one
spring to rear end mount. ALL OTHER RULES APPLY TO BOTH THE “A” AND “B” CLASS:
ENGINE: Engine can be small block Chevy, Ford, or Chrysler. Any bore and stroke is allowed but
cannot exceed 365 cubic inch’s maximum. Blocks must be factory steel OEM blocks. After market or
Bowtie blocks are not allowed. A GM 602 crate engine is allowed. It must meet factory specifications
as delivered from GM. The carburetor, exhaust and all other normal Limited Sportsman rules will
apply. Any 602 equipped car will be allowed a 200 pound weight break and must have “602” in a
minimum 4 inch number posted on both sides of the hood. Engine Location: Engine allowed to be
set back no further than #1 spark plug, in line with upper ball joints. Crankshaft and Rods: May be
stock type steel or cast. 50 lbs. minimum for steel, and 48 lbs. minimum for cast. Balancing of
rotating assembly is allowed. Rods may be any steel, no titanium.
Pistons: May be any flat top. May be zero deck. Heads: May be any OEM cast iron straight plug
heads with a ¾ bowl blend. May also use GM production Vortec Heads. World Products SR, SR
Torquer or Sportsman II. Dart Iron Eagle SS or Dart Iron Eagle Platnum up to a 200. All heads must
be straight plug. No porting, polishing, or grinding is allowed. All ports must remain at factory shape
and volume. Maximum Valve sizes; Chevy - 2.020 intake, 1.600 exhaust. Ford - 2.190 intake, 1.710
exhaust. Chrysler - 2.020 intake, 1.625 exhaust. No titanium valves. No hollow stem valves. Steel
retainers only. Any steel valve springs.
Camshaft: May be any hydraulic or solid flat tappet cam. Lift and duration is open. Roller Cams are
not allowed. Any adjustable timing chain is allowed. No gear drives or belt drives allowed. Stock
lifter diameter only. Lifters with EDM hole may be used Oil Pan and Pickup: May be any steel wet
sump pan and pickup. Remote oil filters are allowed. Cooling System: Racing radiators allowed.
Exhaust: Any 1 ¾ in. maximum primary tube, standard 4 into 1 collector header is allowed. A
maximum 24 in. long collector extension, including muffler may be used. Extension is measured
from the end of the header collector to the end of the extension. No tri-y headers allowed. No
coatings allowed. No merge collectors or “X” pipes allowed.
Intake Manifold: May be any single 4 barrel intake. Must be as cast, no porting or port matching
allowed. Ignition: Must be stock type, HEI only. Digital type modules allowed. No multiple spark
systems allowed. No traction control.
Carburetor: Must be Holley 600 part# 1850 or Holley 650 part # 4777. Carburetors must be stock
appearing. Choke flap may be removed. Up to a 1in. spacer may be used. A 500 CFM Holley 2
barrel may also be used. Air Cleaner; Any Type Allowed Fuel Pump; May use mechanical or electric
fuel pumps. Electric fuel pumps must be equipped with an oil pressure cut off switch.
DRIVELINE: Rear end may be any stock type. Floaters are allowed. “C” clip eliminators are allowed
on GM rear ends, and are highly recommended. Any gear may be used. Positive traction, or spool,
or mini-spool is allowed. Wheel spin sensing differentials are not allowed. Driveshaft may be any
steel and must be painted white. Front and rear safety loops are mandatory. No quick change rear
ends or wide five hubs.
TRANSMISSION: May be stock OEM, 3 or 4 speed, or automatic. Must retain all gears with reverse.
Automatic must retain working torque converter. Straight drive must have single disc OEM type
clutch and pressure plate. Clutch must be 10 ½ in. diameter with full lining. No triple disc or direct
drive clutches allowed. Mechanical or hydraulic clutch release mechanisms may be used. Straight
drive flywheel must be OEM type steel and a minimum of 14 lbs. Blow proof bell housings or scatter
shields are mandatory. SFI approved flex plates are mandatory on automatics.
BRAKES: Must be factory OEM style brakes, disc or drum. No after market or aluminum calipers
allowed. Brakes must work on all 4 wheels. Rotors cannot be cut or lightened. Any pedals may be
used. Brake bias adjusters are allowed. No brake shut off valves allowed.
WHEELS: Any steel 15 x 8in. wheel, any offset allowed. Bead lock may be used on right side only.
TIRES: May use Goodyear G65 or Towel city recaps. Tires cannot be re-grooved, grooved. siped
or altered in any way. Tire softening agents of any kind are not allowed. Tires cannot be screwed to
the wheels in any way.
WEIGHT: "A" class cars must weigh 2800 lbs. minimum after race with driver. "B" class cars must
weigh 2900 lbs. minimum after race with driver. Proper car weight must be displayed on both sides
of the hood in a minimum of 3 in. numbers, MANDATORY. FUEL: May use pump gas or 110 Race
Gas. No performance additives of any kind will be allowed.
ANY ITEM NOT LISTED IN THESE RULES MUST BE APPROVED BY THE TECHNICAL DIRECTOR
BEFORE COMPETITION OR IT IS ILLEGAL.
*** you may run Hoosier med/american racer med.
also bert transmissions (bert type) OK
triple disc clutch ok