Bronson Speedway
2013 Sportsman Rules
ALL VEHICLES
1. Any 1970 or newer American made passenger vehicle with a minimum wheel base of 105? and a minimum weight of 3000 lbs. with driver-after race.
2. Maximum 58% left side weight, with driver-after race. No tolerance.
3. No station wagons or convertibles allowed.
BODY
1. Any fiberglass, aluminum, or original production body allowed. No trucks, station wagons, or convertible bodies allowed.
2. Gutting of interior permitted. Dash may be removed or replaced.
3. Minimum of (3) front hood pins, and (2) rear hood pins required. May use hinges on rear of hood instead of pins.
4. Hinges and/or pins required on deck lid.
5. Aftermarket nose piece and tail piece permitted for model of car.
6. Side skirts permitted. Minimum 4? ground clearance on any part of skirt.
7. Lead ballast may be added but must be securely fastened to frame with minimum (2) 1/2? bolts for each block of ballast. 50 lb. maximum per block. Must be painted white and have your car number on each block.
8. Full Lexan windshield required. Minimum 1/8? thick. Car number must be marked in top right corner(pass. side) of windshield, for line up purposes.
9. Driver's compartment must be sealed from engine compartment and trunk area with minimum 22 gauge steel. Absolutely no holes in fire walls. Driver's compartment may be boxed.
10. Maximum 6? high rear spoiler. No side spoilers permitted.
CHASSIS AND SUSPENSION
1. No truck frames permitted.
2. Steering components may be altered.
3. Spring heights may be altered. Racing springs allowed.
4. Any steel bodied racing shocks allowed. No coil over shocks.
5. Shock mounting points may be relocated.
6. Tubular upper A-frames allowed.
7. Lowering blocks, Shackles, Sliders, and Steel suspension bushings allowed.
8. Aftermarket sway bars permitted. May be adjustable.
9. Uni-bodies may be tied together with box tubing from back of front stub, to the front of rear stub only. Frames can be fabricated behind rear axle. Under slung chassis permitted.
10. Wedge bolts permitted-front and rear.
ENGINE
1. GM 602 Crate engine with 650 CFM carburetor (Holley #80541-1) permitted. Crate engine may use maximum 1? thick carburetor spacer.
2. Engines may be interchanged from manufacturer of chassis.
3. 400 cubic inch Maximum.
4. Engine must mount in stock location. Aftermarket engine mounts permitted.
5. Decking of engine block permitted.
6. No titanium or ceramic engine parts allowed.
7. Stock type push rods only.
8. Any hydraulic or solid camshaft permitted. No roller cams.
9. Flat top piston only. May be fly cut for valve clearance.
10. Piston may use floating wrist pin.
11. Any piston ring(s) permitted.
12. Steel connecting rods only.
13. Cast or Steel crankshaft - minimum crank weight = 48 lbs. for cast or 54 lbs. for steel. No knife edge crankshafts.
14. Aftermarket harmonic balancer recommended.
15. No Bowtie, SVO, or Aluminum engine blocks allowed.
CYLINDER HEAD
1. Steel cylinder heads only. Screw-in studs and guide plates permitted. Roller rocker arms permitted.
2. Steel or Stainless Steel valve train components only.
INTAKE MANIFOLD
1. Any cast iron or aluminum intake manifold.
2. No porting, polishing, or grinding on intake.
3. Maximum 1? thick carburetor spacer.
CARBURETOR
1. Box stock Holley #4412 500 CFM Carburetor only. May not be altered in any way.
2. Choke plate may be removed.
OIL SYSTEM
1. Wet sump oil system only. May use windage tray. Oil pump must mount in stock location on engine block. No external oil pumps.
2. Remote oil filter permitted.
3. Screens or plugs in oil galley and lifter valley tray permitted.
4. No vacuum pumps allowed.
WATER PUMP
1. Any belt driven water pump permitted.
FUEL PUMP
1. Any mechanical fuel pump permitted. No electric or belt driven fuel pumps.
2. No rubber fuel line or plastic or glass fuel filters .
TRANSMISSION
1. OEM automatic transmission with operating torque converter.
2. OEM manual transmission with at least two forward gears and reverse.
3. No five or six speed transmissions.
4. Blow proof bell housing required with all manual transmissions.
DRIVESHAFT
1. Steel driveshaft only.
2. Driveshaft must be painted white.
3. Driveshaft hoops required front and rear. (See SAFETY rule #9)
REAR END
1. Floater rear allowed. Quick change rears permitted but must add 100 lbs.
2. Interchanging of rear ends allowed.
3. Shock mounting points optional.
4. Leaf springs may use sliders.
5. 3-link rear suspension allowed.
CLUTCH
1. Any 10? minimum diameter steel single disc clutch allowed.
FLYWHEEL
1. Steel flywheel only.
ELECTRICAL
1. Any battery fired ignition.
2. No multi spark ignition (MSC etc.).
3. Any OEM style High Energy Ignition distributor
4. Any electric starter. Vehicle must be able to self start without assistance.
5. Battery must be enclosed in marine type battery container.
6. 12 Volt system only.
EXHAUST
1. Exhaust pipe must exit to side of vehicle behind driver.
2. Maximum 3? exhaust.
FUEL
1. Absolutely no fuel additives or nitrous oxide.
2. Maximum 22 gallon fuel cell mandatory. Removal of trunk floor for mounting of fuel cell is permitted. Minimum 8? ground clearance at all times.
3. Fuel cell must be in steel container and securely mounted.
4. Tip over valve required.
5. No external filler neck.
WHEELS
1. Maximum 8? wide steel wheel only.
2. Minimum 1/2? wheel studs with 1? lug nuts required on all four wheels.
TIRES
1. Approved track tire only (contact speedway office)
2. No tire enhancing or softening treatment permitted.
BRAKES
1. Any four wheel brake system in working order.
REMEMBER, IF THE RULE BOOK DOES NOT SPECIFICALLY ADDRESS SOMETHING, IT IS ILLEGAL.
A printable version of these rules is available HERE.
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