2008 STAFFORD MOTOR SPEEDWAY
SK MODIFIED® DIVISION RULES
CLICK HERE TO DOWNLOAD
THE 2008 SK MODIFIED® RULES IN MS WORD FORMAT |
|
CLICK HERE TO DOWNLOAD
THE 2008 SK MODIFIED® RULES IN ADOBE PDF FORMAT |
PREFACE
The rules in this book are intended to make
racing less expensive and keep competition as equal as possible. While these
rules offer a good outline, every item cannot be covered by a written rule. If
you come up with something not covered in the rules, PLEASE ASK FIRST!
All rules in the NASCAR Rulebook will be
enforced with the following changes and additions. These rules are for Stafford
Motor Speedway only with no expressed or implied agreement with any other
speedway as to the interpretation, implementation and method of inspection by
the technical inspectors and officials.
No equipment will be considered as having been
approved by reason of having previously passed through inspection unobserved.
No car will be considered as having passed inspection for the event until
the finish is made official.
DEFINITION OF
STOCK: In
the following Rules you will see the term OEM Stock used. This means Original
Equipment Manufacturer. The parts must come on a standard production car.
Special "Off-Road" or racing parts will not be permitted unless preapproved.
No carbon fiber or titanium engine, chassis or body parts unless approved by
track officials.
ILLEGAL ITEMS - Absolutely NO removal of,
alteration of, or covering of casting numbers, part numbers, manufacturers
name, logo, insignia, etc., from any item on the race car. To do so makes a
part illegal and will be treated as such. If you come up with a rare part that
we cannot find listed for passenger car use, the burden of proof is on
you. At any time you may be asked to
remove a head, manifold or possibly an entire engine for inspection. Failure to
comply will result in the same penalty as if it were illegal.
INSPECTION - All model, engine or equipment changes or
modifications not specifically addressed in this rulebook must be submitted to
Stafford Speedway for consideration of approval. All equipment is subject to
the approval of Track Officials. Equipment will not be considered as having
been approved by reason of having passed through inspection unobserved. Any
equipment that does not conform to specifications or tolerances contained in
this rulebook or is not otherwise approved by Stafford Speedway may not be used
in competition.
POST RACE INSPECTION. Once a
car has been presented to Stafford Technical Inspectors for post race
inspection the entire car and all its parts become subject to inspection. This
includes but is not limited to items designated for inspection following a
particular event.
SCALES. For purpose of post
race inspection drivers must seated in their cars in a racing position with
helmet either on or placed in their lap. No leaning or hanging on bars is
permitted. The driver must remain in his/her car until it is removed from the
scale area.
ABSOLUTLY NO SOMKING ALLOWED
IN THE FENCED IN TECH AREA
The rules in this book may be added to,
deleted from or changed at any time with the only notice to be given at the
event drivers meeting or via technical bulletin. All officials’ decisions are
final, non-appealable and non-litigable. Technical bulletins will be issued as
needed.
UPDATES - All changes and updates
made during the course of the season for the current rulebook will be posted to
the Stafford Motor Speedway website. This will serve as the only form of
official notification until the printing of next Stafford Motor Speedway
rulebook.
STAFFORD
SPEEDWAY TRACK RULES
NOTICE
Alcohol will not be permitted in the Stafford Speedway pit or paddock areas at
any time. The consumption of alcohol before, during or after a race event in
the pit or paddock areas is prohibited
SECTION 1-4
All NASCAR Rules will be enforced with the exception of the following
STAFFORD SPEEDWAY TRACK RULES. These rules supersede any similar NASCAR Rules and are in effect for all
auto racing events unless otherwise posted and/or announced prior to the event.
NOTE: Some Track Rules may not apply to touring
divisions.
SECTION 6
SAFETY
Stock car racing
is an inherently dangerous sport. Each Competitor assumes that risk when he or
she participates in an Event. The risk of serious injury or death cannot be eliminated
and in fact will always be present at a high level. Members are required to
advise their spouses and next of kin, if any, of this fact. Although safety is
generally everyone’s concern, Stafford Motor Speedway cannot be, and is not
responsible for all or even most aspects of the safety effort. That
responsibility instead rests with the various participants in the Event(s) as
follows.
All competitors
are obligated to inspect the racing facilities, safety personnel and equipment,
and conditions at the track on a continuing basis, before, during and after the
event. Competitors must report to Stafford Motor Speedway management promptly
any inadequacy in the facilities, personnel, equipment or conditions at the
track.
PASSENGERS are not permitted in or on a racecar at any
time. No one shall ride with any part of his or her body outside the racecar.
No riding on trailers or car haulers or pit carts anywhere on the
speedway property.
NEITHER STAFFORD MOTOR
SPEEDWAY NOR TRACK OFFICIALS CAN OR WILL BE RESPONSIBLE FOR THE ADEQUACY OF A
COMPETITOR’S RACECAR, RACING EQUIPMENT OR RACING ACTIVITY TO ACCOMPLISH THIS
PURPOSE.
SECTION 9
RACE PROCEDURE
1. All cars must go
into the infield before turning into the off-track paddock gate except at the
conclusion of the feature event. No right turn from the track to the paddock.
All cars must go through the infield road after each warm-up session and
qualifying event. After feature events cars may go directly into the paddock
area without going through the infield. The first three (3) cars in the feature
finish must report to victory lane. DO
NOT DO BURNOUTS OR DONUTS ANYWHERE ON THE RACE TRACK OR INFIELD AFTER THE
FEATURE EVENT OR AT ANY OTHER TIME.
2. The track crew, officials, wrecker or push truck drivers are not
allowed to work on race cars on the track, infield, pit or paddock areas.
3.
No car will be permitted to pass the caution vehicle unless instructed to
do so by NASCAR Officials.
4.
No car will be permitted on the track at any time without a hood.
5. All owners of cars that the oil pan cannot be removed with the
engine in the chassis must have a carb flange lift plate or other device for
the removal of the engine.
6.
At no time shall a car be jacked up without jack stands with pads being placed
under it except for normal tire changes during the race event. At no time shall a person be permitted to go
under a car without jackstands. This rule applies to both the infield pit and
paddock areas.
SECTION
9.5 HANDICAPPING Note: Some rules
do not apply to DARE STOCK Division.
All drivers must
complete a Number Application form before signing in.
For all events your car must be signed
in 45 MINUTES before the first heat race is scheduled. Once the line-ups are
posted no additional cars may be added.
If your car is signed in but does not arrive you may be credited with
two wins for handicap purposes.
When you sign in
your car state your division, assigned car number
and the driver’s name. If you bring two cars, one as a BACK-UP CAR
you must decide and indicate which car will be your primary car when you sign
in. Drivers will be handicapped on a 3-week money won system. For handicapping
purposes regular feature event purses will be used. Any driver that misses
an event will be credited with a regular feature win in money plus 1/2 feature
win in money for handicapping purposes. Any driver disqualified from a feature event will be credited with a regular
feature win plus 1/2-feature win in money for handicapping purposes. The top 18 drivers in points will be handicapped ahead of drivers not in the top
18 for the main feature only.
No current
season feature-winning driver may be posted to start higher than fifth
position in a feature event.
Note: For some events the top ten cars in
points may be considered as pre-qualified. The car must still be signed in 45
minutes before racing starts to take advantage of being pre-qualified.
All alternate feature cars will be taken
from the consolation event. If a car is disqualified from a heat additional
cars will not be taken from heats but from the consolation or ‘B’ feature.
If in the
opinion of the Racing
Director a car is not competitive on a given night, he has the authority
to deny that driver a front starting position.
For additional
handicapping information please ask handicapper for clarification.
PAST CHAMPION’S PROVISIONAL POSITION
One additional starting positions
have been established which will be available to the most recent Stafford
Motor Speedway Champion who has not qualified for the starting field.
PROVISIONAL POSITIONS
Two additional starting
positions have been established which will be available to the highest drivers
in the current Stafford Motor Speedway Championship Point Standings who have
not qualified for the starting field.
ROOKIE RULES
A. Rookie Rules apply to SK
Modified®, SK Light Modified, Late Model, and Limited Late Models divisions. To
be considered as a rookie you must not have competed in more than five, (5) feature
events in this or a higher division at Stafford Motor Speedway.
B. All cars driven by rookies
must have a yellow stripe on the rear bumper. Rookies may not have another driver qualify a car for them.
C. The current Rookie of the
Year as determined from the previous season, will be awarded $100 each event
starting with the first event of the current calendar year and continuing each
consecutive event until the total award amount for each division is
distributed. To be eligible for the Rookie of the Year award the driver must
attempt to qualify. If the current Rookie of the Year as determined from the
previous season is not eligible for this award, the award will then be available
to the next highest finishing eligible rookie driver in the previous season
Rookie of the Year points standings.
SECTION 9.6 STARTING LINE-UP & RESTARTS
If a car(s) drops out of the posted starting
line-up, all cars in that row will move straight up to fill the spots in all
events. No crossing over. If a restart occurs with ten, (10) laps or less to the end of the
feature, all lapped cars will be removed from and started behind the lead lap
cars in the restart line up.
SECTION 10.4
YELLOW & RED FLAG/LIGHT RULE
SECTION 10.8 CHECKERED FLAG - RACE END
All FEATURE
races will end with a GREEN, WHITE,
CHECKERED unless in the opinion of the officials the track is no longer
safe for racing.
SECTION 11.1 OFFICIAL SCORING
SK Modifieds®, Late Models, SK Light Modified and
Limited Late Models must have a scoring transponder assigned and
attached to the racecar for practice or racing. (Please see installation
specifications on page 7). All competitors will have 15 minutes after their
feature event is announced and posted to file an inquiry. Once the inquiry is
satisfied the official finish will be posted. No changes will be made once the
finish is official. Transponders are required to be on the car and
working for all race events
including practice sessions.
FOR
SALE SIGNS
For Sale Signs are not permitted on cars in feature events.
BACK-UP CARS – Separate number registration is
required for back-up cars. No cars competing in the same
division will be allowed in the paddock area with the same number.
INFIELD PITTING
1.
Infield pitting will be used for all SK Modified and Late Model
features. All crewmembers that
go to the infield pit area will be required to have a NASCAR license.
During race
conditions, any crewmember who steps into the car servicing area must wear a
helmet All people on the infield must wear long pants with a minimum short
sleeve shirt and closed toe footwear at all times. You must pit in your proper
pit stall.
2.
NASCAR pit rules will apply including the amount of
crewmembers over the wall, etc. A stop & go official will be at the exit of
pit road only. You may not enter pit lane until the pace car picks up the
leaders and the pit road is opened. You may pull up to but not pass the pace
car.
3.
No
crewmember may go into the pit box until the car has come to a complete stop.
4. Pit stalls will correspond to the starting positions of the
feature line up.
5. The speed limit on pit road at all times including
qualifying and practice will be 25 MPH.
Speeding in the pits may result in
disqualification.
6. Absolutely no fueling of cars on the infield. No gasoline containers will be
permitted on the infield.
7. Wreckers and push trucks are not permitted to bring pit
materials to the infield to set up your pit stalls.
8. All
cars out of the event must go behind the wall on the infield.
6- 4 PERSONAL SAFETY EQUIPMENT
See NASCAR WEEKLY SERIES
RULE BOOK
6- 4-1 HELMETS- HEAD AND NECK RESTRAINT DEVICES
See NASCAR WEEKLY SERIES
RULE BOOK
6- 4-2 SEAT BELTS
See NASCAR WEEKLY SERIES
RULE BOOK
6- 4-3 SEATS
See NASCAR WEEKLY SERIES
RULE BOOK
SCORING
TRANSPONDER LOCATION
Transponder mounting brackets will be installed on the inside (or outside) of the right rear frame rail. The round post of the bracket must be on top and the square tab on the bottom flush with the lower edge of the frame rail. The bracket must be mounted with it’s center line exactly 12” to the rear of the rear axle centerline and must be completely vertical to the ground. Keep exhaust directed away from transponder.
Transponders are available from
AMB, US, Inc
32 Highlands Parkway, Suite 104
Smyrna, GA 30082
Tel 678-816-4000 Fax 678-816-4001
AMB, US, Inc
www.amb-it.com
1-678-816-4000
Master Frequency List 1-207-571-9165
Racing Electronics:
www.racingelectronics.com
1-800-272-7111
Hoosier
Tire East
1-860-646-9646
Dave
Lind Racing
1-800-562-9527
Reliable Welding & Speed
www.reliableweldingandspeed.com 1-888-225-7223
New England Racing Fuel
www.newenglandracingfuel.com 1-860-673-9555
----------------------------------------------------------------------------------------------------------------------------------------------------------
Track Frequency Channel #1 SK Modified®, Late Model 464.50000
Track Frequency Channel #15 SK Light, Ltd. L.M., D.A.R.E. Stock 461.13750
SK MODIFIED® DIVISION
ALL 2008 NASCAR RULES FOR THE WHELEN MODIFIED
TOUR ARE
ENFORCED FOR THE SK MODIFIEDS
WITH THE FOLLOWING CHANGES AND ADDITIONS.
DRIVER ELIGIBILITY –All drivers must
have a NASCAR FDD (Feature Division Driver) or higher license. Drivers competing in the SK MODIFIED® division
will not be permitted in the SK LIGHT MODIFIED, LIMITED LATE MODEL, or D.A.R.E.
STOCK division on the same event date.
20E- 1.3 APPROVED COMPETITION MODELS
Approved
model bodies are listed in the NASCAR Rulebook. Other models both Domestic
and foreign steel passenger cars may be approved for the SK Modified® division
providing they are the same in body configuration and meet the spirit and
intent of competitive racing in the SK Modified division.
20E- 2.2 OVERALL CAR WEIGHT - All specified weight requirements will be with the driver. The minimum weight at all times will be 2600 pounds. No car will be allowed to have more than 56% of the total weight as the left side weight. Mopars with engines of over 359 cubic inch displacement must add 6.8 pounds per cubic inch over 359. Proper bore & stroke for engine type must be maintained.
20E- 2.3 ADDED CAR WEIGHT - Added weight
must be in block form magnetic steel or lead only of no less than five (5)
pound blocks (no pellets). Added weight must be securely bolted to the frame
rail and painted white with the car number stenciled in black. No added weight
will be permitted inside the driver’s compartment. Weight must be welded in
a box or attached with two or more “grade 8’ bolts minimum 7/16 dia.
20E- 2.4 CAR WEIGHTS AFTER RACE - Nothing may be added to or taken from the car to make total or left-side weight. Gas, oil or water may not be added. Wheels and tires cannot be changed, but an amount equal to one half of one percent (.5%) of the gross weight will be added for loss in weight due to race wear.
20E- 3.2.3 SIDE
WINDOW GLASS/WINDOW SCREEN – All door window glass must be removed. A nylon window screen must be installed
in the left side door window opening. And be positioned to cover the entire
window opening. The window screen must be rib type, made from minimum ¾ inch,
maximum one (1) inch wide nylon material with a minimum one (1) inch and a
maximum 2-1/4 inches square opening between the ribs. The minimum window screen
size must be must be 22 inches wide by 16 inches high. All window screen mounts
must be a minimum ½ inch diameter solid steel rod on the bottom and a minimum
one (1) inch wide by 3/16 inch thick flat steel or a minimum ½ inch diameter
solid steel rod on the top, with mounts welded to the roll cage. The window
screen, when in the closed position, must fit tight and be secured with a
lever-type quick release latch acceptable to Track Officials. The lever must
be secured by a detent ball in the lever and may be supplemented by Velcro®
fastener only – pins or clips will not be permitted. The latch must mounted
at the top in the front to roof bar (#3) release from the inside.
20F- 3.2.5 REAR VIEW MIRROR - One (1) rear view mirror that must be mounted at the top of the windshield no larger than 8” X 2”. No multi-image or side mirrors. Oversized mirrors maybe blacked out by the use of paint only, to obtain the 8” X 2” maximum reflective area. Any size or type of spot mirror is not permitted in any location.
20F- 3.5 DOORS
– Door panels may be made of magnetic steel or aluminum. For additional
specifications see the NASCAR Rulebook.
20F- 3.6 QUARTER
PANELS – All quarter panels may be made of aluminum or magnetic steel. For
additional specifications see the NASCAR Rulebook.
20F- 3.8 HOODS / ROOF – All
roof panels must be made of magnetic sheet steel. For additional specifications see the NASCAR Rulebook.
20E-
3.11 IDENTIFICATION – See NASCAR Rule
Book. Roof numbers must read from passenger’s side of car. Stafford Motor
Speedway reserves the right to assign number colors.
20E- 5 GENERAL ENGINE REQUIREMENTS - Engine must be OEM cast iron V8 production block, heads and intake. Any static compression ration measuring 11.5 to 1 or less will be considered spec. However any compression ratio between 11.6 to 11.9 to 1 can only be deemed legal if the Chevrolet and Ford heads maintain a minimum 60cc combustion chamber. The MOPAR heads must maintain a 64cc minimum combustion chamber. Anything over the 11.9 to 1 however slight, will be deemed illegal. There will be no consideration given to any SK® engine over the 11.9 to 1 static compression ratio.
The ONLY approved engine for GM is the CHEVROLET 350, FORD is the 351, MOPAR is the 360. No deflashing, grinding, welding or painting of any internal area. Maximum overbore for Chevrolet and Ford is .045". Maximum overbore for MOPAR is .030". No block may have more that two (2) cylinder sleeves installed and they must be made of cast iron material.
20F-
5.5 PISTONS/RODS
A. Any flat top three (3) ring round aluminum piston with three (3)
rings in place are permitted. Valve
reliefs for valve clearance only may be cut into the pistons. All three rings
must be of magnetic steel. No portion of piston may protrude above the top
of the block. Effective for 2008 the minimum ring thickness permitted
is as follows:
Compression rings
.043 inch
Oil ring assembly 3.0 mm
B. Only magnetic steel piston pins maintaining a minimum diameter of 0927 inch
are permitted. Full floating pins are permitted.
C. Piston pin holes must be in a fixed
location in the piston and connecting rods.
D. Only two-piece insert style connecting
rod bearings are permitted.
E. Only solid magnetic steel stock type connecting rods are permitted. Hollow beam connecting rods are not permitted.
All after-market connecting rods must be steel sportsman rods. Only normal
engine balancing and the use of after-market bolts and nuts are permitted.
No deburring, deflashing, polishing, grinding or lightening. Billet connecting
rods are not permitted. All rods must maintain the minimum/maximum rod lengths
listed below:
MANUFACTURER MINIMUM MAXIMUM
Dodge 6.000 6.250
Ford “Cleveland” 5.778
6.250
General Motors 5.700
6.250
All connecting rods of an engine must be the same length.
F. Titanium and stainless
steel connecting rods are not permitted
G. Minimum
weight for piston, pin, ring, bearing and rod assembly is 1075 grams.
20E- 5.5.4 OIL PAN - NO dry sumps, external oil pumps or tanks or accu-sump systems allowed. Windage trays of any type will be allowed. Oil coolers are allowed. Only OEM type in the pan oil pumps. No pumps of any type may be used in the evacuation system.
20E- 5.6 HEADS - OEM CAST IRON. The only CHEVROLET heads allowed will be the “492” castings or the “old style 461 or 462 type heads”. Angle plug, Bow-tie or Vortec heads are not permitted. Effective for 2008 the DART part number 10024266 head is permitted. Intake valve must be a maximum of 2.02". Exhaust valve must be no larger than 1.60". FORD CLEVELAND or WINDSOR must run heads of two barrel design that came on a passenger vehicle, with a maximum intake valve of 2.05 and exhaust valve of 1.66. FORD Motorsports heads are not permitted. The MOPAR permitted head is the passenger car version of casting number 3418915 with a maximum intake valve of 2.02 and exhaust valve of 1.60. W2 or TA heads are not permitted Approved replacement MOPAR Heads are ENGINEQUEST Chrysler P/N 318B. IMPORTANT -All CHEVROLET and FORD heads must have a minimum of 60cc combustion chambers. MOPAR must have a minimum of 64cc combustion chambers. When heads are checked at the track you will be responsible for cleaning and carbon removal to make the respective cc limit. The only modifications ALLOWED will be the installation of valve guide sleeves and milling of the gasket surfaces, however angle milling, changing the angle of the head gasket surface in relationship to the rest of the head, is not permitted. Additionally altering the position or angle of the valve guide is not permitted. The addition of screw-in studs, guide plates, valve spring seats, optional valve seals, Poly-Locks or jam-nut devises are permitted. The only machining of valve guide bosses allowed is for seals only. Coolant return lines are allowed to be placed on the ends of the heads. No lines will be allowed on the sides of the head. Any other head must be approved. All other head modifications ARE NOT ALLOWED including but not limited to: porting, polishing or ANY grinding in ports or combustion chambers, chemical milling, glass beading or removal of any flashing or casting marks. No welding or sectioning. No internal modifications of any kind, including painting or Teflon coating. No more than two intake-mounting holes may have HeliCoils. Intake or exhaust manifold mounting holes may not be added or relocated. Holes must take standard intake manifold bolts.
Head gasket surface
milling tolerance for SK Modified® is 0.00” to 0.050” from true 23.00 degrees
of stock valve position.
VALVES - All valves must be identical in appearance and construction as an OEM type valve. No air directional devices will be permitted on any of the valve surfaces. Valve stems must have a minimum diameter of 11/32 inch. Stainless steel replacement valves are permitted.
VALVE JOB - Three (3) angle valve jobs are permitted. When cutting the valve seat angles, no stone or grinding marks are permitted above the bottom of the valve guide. All cutting in reference to the valve job must be centered off the centerline of the valve guide. Upon completion of the valve job, the bowl area under the valve seat down to the bottom of the valve guide should still be the same configuration as far as shape and finish as it was from the manufacturer. Surfaces and/or edges where the cutter or stone has touched must not be polished. No hand grinding or polishing is permitted on any part of the head. Un-shrouding of valves is not permitted.
VALVE SPRINGS & RETAINERS - Any type steel valve springs allowed. Double springs are permitted. Steel valve spring retainers only.
20E- 5.7 CRANKSHAFT
A. Only stock production OEM crankshafts allowed. The main and
rod journal size must be stock for the block being used. Original bore and
stroke combination must be maintained. The maximum allowable stroke tolerance
for Chevrolet and Ford will be +/- .015". Mopar will have +/- .005. Minimum
main journal size .020 under stock. Minimum rod journal size .030 under stock.
B. After-market crankshafts, knife-edge crankshafts, small journal
crankshafts will NOT be permitted.
C. NO machining or polishing of the crankshaft counterweights
allowed. NORMAL engine balancing will
be the ONLY acceptable modification that can be performed on this component.
No painting or Teflon coating. NO drilling of rod journals.
D. Minimum crankshaft weights are Chevrolet engines 50 lb.,
Ford and Chrysler 54 lb.
E. Fluid harmonic balancers will be permitted.
20E- 5.8.1 CAMSHAFT
A. Only magnetic steel camshafts
will be permitted. The maximum camshaft bearing journal size must not be more
than 1.870 inches (47.5mm).
B. ANY type chain will be
permitted. Belt-drive and gear-drive systems will not be permitted.
C. Only standard production
sleeve type cam bearings will be permitted and must be standard diameter for
the production block being used. Needle roller bearings will not be permitted.
D. Camshafts must be driven
in the same direction of rotation as the approved standard production engine
The camshaft must maintain the same firing order as the NASCAR-approved production
engine
The approved firing orders using approved cylinder identification are as
follows:
Dodge
1-8-4-3-6-5-7-2
Ford
1-3-7-2-6-5-4-8
General Motors 1-8-4-3-6-5-7-2
E. The manufacturer’s cylinder
identification sequence is as follows:
Dodge and General Motors Ford
(Front) (Front)
1 2 5 1
3 4 6 2
5 6 7 3
7 8 8 4
F. The front engine cover material must be acceptable to NASCAR Officials
G. Maximum lift at the valve with zero (0) lash is .550”.
20E- 5.8.2 VALVE LIFTERS - Stock lifter
diameter must be maintained. No roller, mushroom, oversize, convex, concave
or ceramic lifters. Only flat bottom magnetic steel straight barrel lifters
of the same diameter and length as stock.
20E- 5.8.3 ROCKER ARMS - Roller rocker arms permitted. Rockers must be independent and stud type for Chevrolet and Ford. Stud girdles are permitted. Stock type shaft rocker system is allowed on Chrysler only. No aftermarket shaft rocker systems.
20E- 5.9 INTAKE MANIFOLD - Stock cast iron passenger car manifolds of 2 barrel design only! Manifold must be one that was used with an OEM two-barrel carburetor. No throttle body manifolds allowed. Throttle bores can measure no more than 1.730”dia.You are required to have an unaltered stock manifold. No porting, polishing, acid dipping, deburring, de-flashing, abrasive cleaning, internal painting, milling, cutting, drilling holes, enlarging bolt holes, matching of ports or welding. Absolutely no modifications of any kind. A track supplied stock intake manifold must fit your engine complete with stock gaskets. All boltholes must be in alignment and same size as stock. Absolutely no coolant lines in the intake manifold.
20E- 5.10 CARBURETOR – The only approved carburetor shall be the Holley two-barrel model # 4412. All parts must be a Holly part for the 4412.
(1) Body of Carburetor: No polishing, grinding or drilling of holes permitted.
(2) The choke may be removed, but all screw holes must be permanently sealed.
(3) Choke Horn: Choke horn may not be removed.
(4) Boosters: Boosters may not be changed. Size or shape must no be altered. Height must remain standard.
(5) Venturi: Venturi area must not be altered in any manner. Casting ring must not be removed.
(6) Alterations to allow additional air to be picked up below the opening of the venturi such as altered gaskets, base plates and drilling holes into the carburetor will not be permitted.
(7) Base Plate: Base plate must not be altered in shape or size.
(8) Butterflies: Stock butterflies must not be thinned or tapered. Idle holes may be drilled in butterflies. Screw ends may be cut even with shaft but screw heads must remain standard.
(9) Throttle Shaft: Shaft must remain standard and must not be thinned or cut in any manner.
20E- 5.10.2 CARBURETOR SPACER - Only one solid spacer made of aluminum or phenolic plastic of a maximum height of 1” permitted. Only one .075" max. gasket per side. No wedge shaped mounting surfaces, both top and bottom surfaces must be parallel. Spacer can be no larger than base of carburetor. Port holes or hole must be vertical to the surface with no beveling, tapering, or flaring. No additional openings for the induction of air allowed. Track Officials must approve all spacers.
20E- 5.12.1 CARBURETOR AIR FILTER / AIR FILTER
HOUSING
A. Only a round dry type paper air filter element maintaining a minimum 12 inches and maximum 14 inches diameter will be permitted. The air filter element must maintain a minimum of 1½” inches, maximum five (5) inches in height. All air must be filtered through the element.
B. Only a round metal filter housing will be permitted. The top and bottom of the air filter housing must be solid with no holes. A maximum of one (1) inch lip will be permitted from the air filter element to the outer edge of the air filter housing top and bottom. The air filter housing carburetor mounting ring must have only one (1) round hole a minimum of five (5) inches in diameter. It is permissible to attach a shield to the front area of the air filter housing up to a maximum of one half of the air filter circumference. The shield must not be higher than the height of the air filter element. The air filter housing metal top and bottom must be of the same diameter. The air filter housing must be centered side to side and set level on the carburetor. No air induction, ducts, baffles, tubes, funnels or anything else which may control the air entering inside of, or between the air filter and carburetor. No plastic air filter housings or parts.
C. The bottom of the air filter element must measure within one (1) inch of the carburetor’s top flange. A spacer may be used between the carburetor and the air cleaner so long as the one (1) inch specification is not exceeded.
D. No portion of the hood may be higher than the bottom of the air cleaner.
20E- 6.1 IGNITION SYSTEM – NASCAR APPROVED
IGNITION SYSTEMS ONLY
A. Electronic distributors are permitted. All electronic distributors must be in stock type housings, have stock type controls and modules, be equipped with a magnetic pickup, be gear driven, and be mounted in the stock location. Billet distributor housings are permitted
B. Single or dual point camshaft driven distributors are permitted.
C. Only one (1) ignition coil is permitted and must be mounted on engine side of the firewall.
D. Electronic firing module amplifier box is NOT permitted.
E. Computerized, multi-coil, dual electronic firing module box or crank trigger systems are not permitted. Magnetos are not permitted. All ignition systems are subject to approval by Track Officials.
F. Adjustable timing controls are not permitted.
G. Retard or ignition delay devices will not be permitted.
H. Only MSD # 8728 External RPM limiter with the violet wire cut back flush to the unit’s housing, with the green and the white wires run directly to the coil negative, mounted on the engine side of the firewall in plane view, will be permitted (if used.)
I. Accessories to regulate the power supply are not permitted.
J. The tachometer wire must run from the distributor
to the tachometer along the #8 dash bar separate from any other wires and
in unobstructed view for inspection. The tachometer wire must be isolated
from any other wires, connections or devices. The entire length of the tachometer
wire must be visible from distributor to the gauge.
K. The Vacuum advance
unit may be replaced with a manual non-electronic timing adjuster that does
not extend more than two inches beyond the distributor housing.
20F- 6.4 STARTER - Stock type starter only. Must be in stock position and operative at all times.
20E- 6.5 BATTERY - Only a single 12 - 18 volt OEM automotive type or an automotive type gel-battery will be permitted. The battery must be located between the frame rails under the hood or the floor of the car. If located under the floor, the battery must be completely encased, if located under the hood the battery must have a suitable cover. The battery must not be forward of the radiator or rear of the rear end housing of the car. The battery location must be acceptable to NASCAR Officials.
20E- 6.7.1 RADIOS - Are MANDATORY for communication between driver and crew. Stafford Speedway reserves the right to monitor and broadcast radio communications between the drivers and crews as well as the right to revoke any and all communication privileges of the driver and crew if at their sole discretion and judgment that communication is being misused in any way.
NOTE: Frequency listing available from; Master Frequency List.