Joe Hunt Magnetos Wingless Sprint Car Series 2013 Rules
Effective January 16, 2013, and supercedes all previous Rules.
Interpretation of these rules or amendment to these rules may be made at any time. The rules
and/or regulations set forth herein are designed to provide for the orderly conduct of racing events
and to establish minimum acceptable requirements for such events. These rules shall govern the
condition of all events, and by participating in these events, all registrants are deemed to have
complied with these rules. No express or implied warranty of safety shall result from publications
of, or compliance with these and/or regulations. They are intended as a guide for the conduct of
the sport and are in no way a guarantee against injury or death to participants.
RULE BOOK DISCLAIMER:
The rules and/or regulations set forth herein are designed to provide for the orderly conduct of
racing events and to establish minimum acceptable requirements for such events. These rules
shall govern the condition of all events, and by participating in these events, all participates are
deemed to have complied with these rules. NO EXPRESS OR IMPLIED WARRANTY OF
SAFETY SHALL RESULT FROM PUBLICATION OF OR COMPLIANCE WITH THESE RULES
AND/OR REGULATIONS. They are intended as a guide for the conduct of the sport and are in no
way a guarantee against injury or death to a participant, spectator or official. The race director
shall be empowered to permit minor deviations from any of the specifications herein or impose
any further restrictions that in his opinion do not alter the minimum acceptable requirements. NO EXPRESSED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF
SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the
officials. Their decision is final. Referee’s decision is final.
A. Open to any sprint car chassis 1984 to present.
B. Minimum cage structure to be no less than 1 3/8” 0.D.with .095 minimum wall thickness. Cage
MUST extend 2” above driver’s helmet. A halo bar will be required if drivers helmet sits too high.
C. NO TITANIUM. NO EXCEPTIONS. (No ROTATING TITANIUM 2010)
D. Motor, body, seat and fuel tank must be mounted to the centerline of the chassis.
E. Chassis should be provided with a minimum of 6 mounting points to securely mount the seat as specified by seat and chassis Manufactory.
F. Wheelbase minimum of 82”. Wheelbase maximum of 96”.
G. Hollow or drilled bolts, fasteners or Heim joints are prohibited.
H. All cars must weigh 1650Ibs. With driver and all driver’s equipment. You can be weighed at any
time during the event.
BODY / GENERAL APPEARANCE / AERODYNAMIC DEVICES
A. Body/chassis must be well maintained. NO JUNK. PAINT OVER RUSTED HEADERS ETC.
Must have at least one number on both sides of tail tank and on front nose piece Minimum size of
number 18” tall 2” wide and contrasting color of car. Number must be legible and LARGE
ENOUGH TO BE EASILY READ FROM THE SCORING BOOTH. NO EXCEPTIONS.
B. Conventional sprint car hoods allowed. Hood must extend to the front torsion tubes or a similar location on Coil over cars. While the hood may be a multiple piece design, it must appear to be one continuous piece. Conventional side panels and tail tanks only.
C. NO AERODYNAMIC DEVICES ALLOWED. NO WINGS, WEDGES, FOILS, MODIFIED BELLY
PANS (flat only) OR UNDERSIDE MODIFICATIONS. NO EXCEPTIONS. THE OFFICIAL
DECISION WILL BE FINAL. No body part may be designed to trap air or otherwise form a wind
break except those to cool or protect the engine or braking system.
D. No side foils, rudders or panels are to extend beyond rear cage support bars on any side.
E. No body pieces to extend beyond or underneath front torsion tube with the exception of the
F. No Gurney lips or turnouts are permitted on any body panels.
G. Sunshields cannot restrict driver vision.
H. Right side arm guard may not exceed 36” in height measured from top of bottom frame rail.
The driver’s right side opening must be a minimum 10 inch vertical opening at any point and a
minimum 21 inch horizontal opening at any point.
I. Driver must be able to easily escape the car. Drivers may be asked to demonstrate this
J. Firewall will be solid metal and fit between the engine and the driver. Access holes may be
drilled for wiring and linkage.
K. Floor pan must extend from the firewall to the front of the driver’s seat. Constructed of steel or
L. No mirrors or electronic communication devices of any kind, No sign boards.
M. A kill switch is required with in easy reach of the driver and Safety Crews. It must be clearly
labeled “ON” and “OFF.
A. Roll bars shall be of the full cage type, mild seamed steel 1 ½” or 1 3/4” X .120 wall minimum.
4130 Chromoly 1 ½” or 1 3/4” X .095 wall minimum.
B. All “T” intersection must be gusseted and welded on both sides.
C. Cage to be above driver’s helmet by 2”. A halo bar will be required if drivers helmet sits too
D. You may be asked to drill 1/4” hole in roll cage for inspection purposes.
E. Upper roll cage is to be padded on 3 sides (sides and rear for driver/safety crew safety.
F. The technical official or race committee must approve all roll cages.
SUSPENSION AND STEERING COMPONENTS
A. Any conventional torsion bar or coil-over suspension is allowed. Combining the two is allowed.
B. Independent rear suspension is not allowed.
C. Straight front axle only. Aluminum or Titanium front axles are not permitted
D. One shock per wheel.
E. Quick release steering wheel mandatory.
F. NO COCKPIT ADJUSTABLE SUSPENSION DEVICES. NO EXCEPTIONS.
G. Drag links must be tethered to the frame with nylon webbing of at least 1 inch width.
A. Minimum weight 1650lbs on all cars with the driver fully suited in the car.
B. All added weight should be in block form or formed to frame, PAINTED WHITE, with the car
number on it. Bolt on weight is permitted but must be securely installed on the cars’ basic
framework and must be located in the area between the bottom frame rails and axles but mounted
no higher than the upper rails. No one piece weights over 20lbs.
C. Weight cannot be added, moved, or replaced during yellow or red flag conditions.
D. Any car weighing light after the heats or Main will be scored and paid for last place.
E. Except for extenuating circumstances drivers must remain seated and inside the frame rails
until weighing is completed. Violation may result in disqualification from the racing event for which the car is being weighed.
A. 360 cu. in. + 2% (367.6 MAXIMUM cu. in. with NO EXCEPTIONS).
B. Cast iron block and heads required.
C. All engine cylinders must be machined from iron/steel alloy only. Only two valves and one
spark plug permitted per cylinder.
D. Only normally aspirated motors are permitted. No turbo, superchargers or forced induction of
any description will be permitted.
E. Dry sump oil systems OK.
F. Engine connecting rods must be 100% steel. There must be an inspection plug in the oil pan.
Either a #12AN fitting or a 1 inch pipe plug. If a car is to be inspected and there is no inspection
plug in the oil pan it will be required to pull oil pan for inspection 2010 season.
A. Steel rods only.
A. A. Any stock or aftermarket flat tappet cam and lifters ONLY. Camshaft button is allowed.
Hydraulic roller cams and lifters are NOT allowed.
A. Are Allowed.
A. Must be OEM or aftermarket cast iron heads only.
B. All heads must be stock valve angle for make.
(Chevy = 23 degree, Ford = 20 degree, Dodge = 18 degree)
C. Grinding, porting and polishing of heads is allowed.
D. No angle milling of heads.
E. All casting numbers must remain visible.
A. Roller rocker arms or roller tip rocker arms are allowed.
B. Stud girdles ok.
A. Aluminum 4bbl. intake manifold OK. 1/2” pipe plug in valley area of the intake manifold,
(Between carb. and dist.) To check cams with-out opening engines or pulling distributor. External
modifications to intake are not allowed.
B. Ram intakes are NOT allowed.
A. Must have THREE METAL throttle return springs MANDATORY.
B. Must have toe strap on throttle pedal.
C. Bottom of carburetor may be no more than 4” from top of manifold.
D. Holley #4412 or Demon or 9647 Series 500 cfm. 2bbl carburetor.
F. 1 11/16” throttle bore; shafts and throttle plates must be stock. External jets OK.
G. Venturi may be opened .010 over catalog specs.
H. Choke tower may be removed.
F. Track Go-No Go Gauge will monitor carburetor specifications.
A. All Battery-powered ignitions or Magnetos will be allowed.
B. Cars must have a clearly marked ON/OFF ignition switch within reach of the driver and visible
to rescue workers.
A. Electric pumps are NOT allowed.
A. RACING alcohol or gas only. No Nitro or Nitrous Oxide.
B. NO ADDITIVES. Including oxygenated additives OF ANY KIND! SUBJECT TO INSPECTION
AT ANY TIME.
A. Fuel systems must have shut off device within reach of the driver, marked in large bold block
letters and painted a “”Day glow-Red”” color for easy identification. A Waterman Shut-off system is recommended for additional safety.
B. All fuel lines and filters will be securely and safely mounted to the satisfaction of the officials or
race committee. NO EXCEPTIONS.
A. A securely mounted fuel cell with bladder is required. Midget or sprint type is OK.
B. Minimum 25 Gallon tank. Maximum of 40 Gallons.
C. Fuel tanks may not be mounted to the chassis utilizing any portion of the access plate or the
nut plates bonded into the fuel bladder.
D. Mounting fuel tank to chassis: All mounting points must have inner and outer plates attached to the shell or use mounts molded into tank. The plates must be of adequate size to insure the tank being secure to the chassis. All tanks will have four different mounts to the cage.
E. Tank vent MUST have check valve.
F. All fuel cell mounts subject to safety inspector’s or race committee approval.
G. Any car leaking or spilling fuel will be BLACK-flagged.
A. Must be in front of engine.
B. ANTI-FREEZE IS NOT ALLOWED.
C. WATER WETTER & WATER SUGGESTED.
A. All drive trains must have a driveline or rear end coupler system (to disengage rear end from
engine). Torque arm drivelines are not allowed. All drivelines must be enclosed and have no more
than 1 u-joint and that u-joint must be at the front of the drive line.
B. Buckley Yokes OK.
C. All cars must utilize either a driveline strap or a drive line hoop restraint constructed of .065
inch steel either welded or bolted to the chassis. Metal hoop restraints must react positive to
magnet testing. The rear cross member used for mounting the steel driveline hoop must be
constructed of .083 inch steel
D. Steel or approved aluminum shield that covers the flywheel is mandatory when bell housing is
inside the cockpit.
A. Any conventional quick change rear end is allowed with a maximum 2” offset.
BATTERY / STARTERS
A. Must carry 12 volt battery. Recommended location is under driver’s seat.
B. If battery is WET TYPE it must be covered to prevent acid spills.’ Maintenance Free’, no vent
caps and sealed battery is suggested
C. On board, working starters are REQUIRED
D. Cars must start each event from the staging WITHOUT ASSISTANCE. Cars requiring
assistance at original start must go to the back of the pack.
E. Assisted starts from red flag work area, during red flag conditions OK. Also may be assisted on
yellow flags to help keep show moving, Yellow flag rule still applies.
A. Bumpers and nerf bars must be sprint car type bars and securely bolted to the chassis with
minimum1/4” bolts. Bumpers and nerf bars will be constructed of no less than 1” 0.D. and .060
wall thickness. Side nerf bars may have a triangular or 4 point configuration and may not extend
outside rear tires.
B. The front bumper may not extend more than 8 inches from the frame or 23½ inches from
center of front axle to front of front bumper.
A. Any tire may be used at Joe Hunt Wingless Series events.
A. Any aluminum, steel six-pin or spline wheel are OK. Any wheel offset is allowed.
B. Maximum wheel width: Front 10”, Left Rear 15”, Right Rear 18”.
C. Bead locks on all wheels is recommended.
D. Plastic or carbon fiber wheels are not allowed.
A. Minimum left front and left inboard rear brake system. Front and rear brakes must work at start of event. Rear brakes must work at ALL times. Additional rear brake OK.
B. Steel, cast iron, aluminum or titanium rotors only. Carbon fiber rotors are not allowed.
C. No copper or plastic brake lines.
EXHAUST / MUFFLERS
A. Mufflers are mandatory.
B. Mufflers to be securely fastened.
C. Mufflers and headers must remain attached. All muffler and header components must remain
intact and operating. Failure to comply with this provision will result in automatic disqualification
D. Track DBA requirements must be met 95dba @ 100’. ABSOLUTELY NO EXCEPTIONS AS
THIS NOISE REQUIREMENT WILL BE ENFORCED.
A. No leather straps, ropes, chains or wire may be used to hold or bind components together.
A. High-back Aluminum (stockcar style) seats should be securely mounted to the frame as
recommended/required by seat manufacturer and chassis manufacturer. Sprint car suitable FIA
manufacturer approved composite seats are permitted.
B. Head rest (behind the head) should include padding.
C. Seat should be mounted in 4 places to the chassis with minimum 5/16”steel bolt and nut.
D. Mounting hole in seat must have a 2” diameter mounting plate with a minimum .060”.
E. Positively No Homemade Aluminum, Plastic or Fiberglass seats allowed.
F. A right head net or support is highly suggested. Head nets must be equipped with quick release
SAFETY BELT REQUIREMENTS
A. General - Each Competitor is solely responsible for the effectiveness of personal safety
equipment used during an event. Each competitor is expected to investigate and educate
themselves with the effectiveness and availability of personal safety equipment.
B. Seat Belts - Each car should be equipped with an SFI 16.5 or SFI 16.1 approved seat belt
restraint system until the date of the belt expiration (usually two years). Seat belts restraint
systems shall be installed in accordance with the directions and application of the system supplier
or manufacturer. (A quick release seat belt and shoulder harness no less than 3” wide and
submarine belt (crouch) are mandatory. 2” wide shoulder harness for Hans device ok).
C. Seat belt webbing that comes into contact with any sharp or metal edge should be protected
from that edge by means of push on grip vinyl trim. Seat manufacturers supply the seat with trim
protecting the webbing from abrasion or cutting under impact conditions and should be used to
D. It is the responsibility of the driver, not the Track, Officials or the Promoter to ensure that
his/her seat belt restraint system and all components are SFI approved, correctly installed,
maintained and properly used.
E. All belts must be mounted to the roll cage separately from the seat with 7/16” grade five bolts
minimum or 3/8” grade five bolts for ratchet belt hold-down.
F. Belts must come from behind driver. The mounting position is important! Shoulder belt should
be mounted approximately 4” below the shoulders. The lap belts mounting should be the same
width of the driver.
G. Harness/belts must be worn at all times when the car is on the track.
H. 2yrs old on belts maximum. The date stamp must be readable and belts must not be worn
(frayed) or the will have to be replaced for you safety.
A. Driver should wear a full face helmet, with at least a valid SA 2005 Standard Snell and/or a
valid SFI 31.1, SFI 31.2 or SFI 31.1 2000 label at all times on the track or when car is fired.
B. The driver should wear the helmet in accordance with the directions provided by the helmet
manufacturer and/or supplier.
C. Neck collars or HANS type device required. HANS type devices are highly suggested. If a head
and neck restraint system is connected it should conform to the manufactures mounting
D. Helmet and face shield must be worn at all times while operating A car on the race track. No
E. Each driver should wear a fire resistant uniform meeting the SFI 3.2A/5 specification and
display a valid SFI 3.2A/5 label.
F. Each driver should also wear fire resistant accessories that effectively cover the remaining
parts of the body. Shoes and gloves should meet the SFI 3.3 specification and display a valid
SFI.3label. Nomex-type or equivalent fire resistant uniforms (suit), gloves, neck brace, shoes, Are
G. Nomex-type or equivalent hood socks or skirts mandatory.
H. Nomex-type or equivalent socks, underwear are highly suggested.
I. Right Side window Net suggested. Window nets must be equipped with quick release
J. Quick release steering wheel mandatory.
K. Arm restraints are mandatory.
L. Flame retardant roll bar padding, knee and steering pads or padding highly suggested.
M. Other SAFETY ITEMS
1) No sharp or protruding edges in or around the cockpit, which would impede the driver’s rapid
exit from the car.
2) Windshield screens with a minimum of .090 inch screens must be securely fastened.
3) A marked electrical kill switch in reach of driver.
4) A marked fuel shut off valve in reach of driver.
5) Flame retardant seat padding is suggested.
GENERAL SAFETY REQUIREMENTS
A. A medical examination of any driver may be required as needed by officials for safety.
B. All wrecked cars must be inspected by a safety official before re-entering competition. A race
car may be inspected by officials at any time.
C. Any car found to be illegal will be disqualified from competition.
D. Seat belts will be used at all times.
E. All moly or hiem ball joints will have flat washers installed.
A. It is recommended that teams have in the rear of their transporter an easily accessible fire
extinguisher of at least 2.5 gal FFF or equivalent.
A. Any car or driver rolling over may be subject to approval to participate in any event that night,
unless cleared through the track official. Any official may make comments in regards to the
condition of the car and/or driver. ANY CAR, TEAM, OR DRIVER NOT MEETING SPEEDWAY
SPECIFICATIONS, OR STANDARD RACING SAFETY PROCEDURES AND EQUIPMENT, IS
SUBJECT TO AUTOMATIC DISQUALIFICATION AND/OR PENALTIES.
A. Participating car owners and drivers ONLY may protest another car’s compliance with the
rules. Car must be still running competitively at end of feature. The protest must be filed with the
track referee or the Technical Inspector with a $500 deposit ($350 protest $150 Tech Time) for a
top end inspection which includes all top end items plus the piston rod assembly, timing chain,
camshaft. Deposit must be within 10 minutes after the main event and protested CAR OWNER
may counter protest within 10 minutes after being notified. Once the Technical Inspector receives
protest money, protest has begun. Money will not be dispersed until protest inspection of the
engine rules and office notified of results. If anything else regarding the engine is being
questioned it must be written down on the original protest, it must state what is to be inspected.
No engine protest’s last 4 races of the season. MUST BE REGISTERED PARTICIPANT OF
B. Tear down location shall be agreed upon before leaving Silver Dollar or Placerville Speedways.
Both parties must agree and sign protest agreement. Driver/Owner being protested may have first
choice of where tear down will take place, must be in Local area and shop properly equipped.
Officials will make final decision. The protest car must leave for tear down area within 30 minutes
or be declared illegal.
C. Tear downs will be made by the driver, one pitman or mechanic, the Technical Inspector or
person chosen by him to be an observer and two alternates. The committee will also safely check
cars and assist in rules interpretations.
D. If declared legal the deposit goes to the protest owner. If declared illegal the deposit is returned
to the protester, the car and owner/drivers will be penalized a two weeks suspension, car and
drivers money and points for the night and lose all accumulated points in this division, additional
fines may be imposed!
E. No alcohol before or during the protest inspection!
F. Do not abuse this rule!
Series Format – 3 Heats
1. Qualifying during hot lap sessions.
a. Maximum of 5 cars per qualifying group, 4 laps, best time counts for line up.
b. Track sound rules apply, loud cars in hot lap session will be penalized in heats and main (behind inversion in heat, no better than 7th in the main, and can not make the dash).
2. Heats lined up by times with a 6 car inversion, with fast time being 6th car in heat 1, with a maximum of 12 cars per heat.
3. Heat races (8 laps) will transfer the top 4 finishers directly to the A feature.
4. Dash will be the 3 heat race winners, plus the fastest qualifier that transfer from each heat. The dash will be 5 laps total, and will set the first 3 rows of the A main.
5. Rows 4, 5 and 6 will be the 6 cars that transferred but did not make the dash (lined up by times).
6. Non-transfer cars will run a semi (10 laps) lined up by times. The top 8 finishers will move to the A feature with 1 & 2nd place cars getting their times back behind the transferred cars (7th row).
7. The A feature will be 25 laps or 45 minutes maximum. (clock to start when the 1st car fires in the staging lane)
8. Dash only when time permitting.
9. Children in the grandstands will be selected to draw the 6 inversion pills for each of the 6 dash cars. (draw in reverse qualifying times)
10. All children selected will receive an autographed T shirt signed by pill draw Hunt Series drivers.
2 Heat Format – Feature lineup is the heat winners, plus 2 fastest qualifiers that transferred, from each heat.
Qualifying out of order – If entire field is required to stage any car that misses the 5 minute call to stage will loose 1 qualifying lap (no line-up penalty) but if they miss their position by more than 2 spots they will receive 1 lap at the end of qualifying, start behind the inversion in their heat, and no better than 13th in the A Feature.
Decisions of Joe Hunt Magnetos Wingless Sprint Car Series Official(s) are final and binding without exception. PROMOTER RESERVES THE RIGHT TO ADD OR DELETE EVENTS AS DEEMED NECESSARY. ALL DECISIONS WILL BE FINAL AT THE PROMOTERS DISCRETION.