2013 SK LIGHT MODIFIED RULES
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ALL
RULE REVISIONS FOR 2013 CHECK YOUR CORRESPONDING RULE BOOK FOR COMPLETE
EXPLANATION.
SK
LIGHT MODIFIED RULE CHANGES
REV. 10/18/12 20E-5-A
GENERAL SPEC ENGINE REQUIREMENTS
REV. 10/18/12 OP 20E-5-B
DETAILED OPTIONAL SMS 602 SPEC/CRATE ENGINE REQUIREMENTS
REV. 10/18/12 20E-10-8 TIRES
REV. 1/9/13 PROPOSED CHANGES FOR 2014 SEASON PER NASCAR WHELEN MODIFIED TOUR RULEBOOK
PREFACE
The rules herein shall refer
to Stafford Motor Speedway as “SMS”. These rules are intended to create
affordable and fair competition. While they offer a good outline, every item
cannot be covered by a written rule. If you have questions regarding something
not detailed in these rules, please consult an SMS Official for clarification
before proceeding. These rules are for SMS only with no expressed or implied
agreement with any other speedway or series as to their interpretation,
implementation and method of inspection by their technical inspectors and
officials. No car, component or equipment will be considered as having been
approved by reason of having previously passed through inspection unobserved.
No car, component or equipment will be considered as having passed inspection
for the event until the finish is made official. All engine models,
equipment changes, or modifications not specifically addressed in the rule book
by SMS must be submitted in writing for consideration of approval on or prior
to September 2, 2013 unless otherwise authorized by SMS to be considered for
competition for the 2014 season. All equipment is subject to the approval of
SMS Officials. You may be assessed penalties including but not limited to:
added weight, fines, loss of points, loss of handicapping, and suspension, car
parts, components, and/or equipment deemed as not in compliance with these
rules. Any car part, component, and/or equipment which does not conform to
specifications or tolerances contained in the 2013 rule book or is not
otherwise approved by SMS may not be used in competition in 2013.
By engaging in competition at SMS, you hereby agree to have read the SMS 2013 General Rulebook and the 2013 SK Light Modified Rulebook.
SK Light Modified Mission
Statement:
An open-wheeled Modified based upon the SK Modified®
format integrating rigid cost controls. This division will provide a budgeted
open-wheel racing opportunity for participants seeking to pursue an
open-wheeled racing career.
All 2013 NASCAR rules for the
Whelen Modified Tour will be enforced for the SK Light Modifieds with the
following changes and/or additions:
SMS approved service centers
for the GM Performance Factory Sealed Circle Track Crate Engines are:
R.A.D.
Auto Machine
Ludlow, MA
1-413-583-4414
T/A
Engines
Plainville,
CT 1-860-747-6713
DRIVER
ELIGIBILITY -
All drivers must have a NASCAR CHD
(Charger Division Driver) or higher license. Drivers competing in the SK Light
Modified division at SMS will not be permitted in the D.A.R.E. Stock, Limited
Late Model, Late Model, or SK Modified® divisions on the same event date.
Drivers must be minimum 15 years of age.
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 Light Modified division providing
they are the same in body configuration and meet the spirit and intent of
competitive racing in the SK Light Modified division.
20E-
2.2 OVERALL CAR WEIGHT
All specified weight
requirements will be with the driver. The minimum total weight at all times for
cars with standard bore engines will be 2,600 pounds. The minimum total weight for cars with any other engine will be
2,650 pounds. Car weight must be posted
on the hood. Maximum left side weight of all cars is 56% of total weight. Cars
found under the minimum total weight rule after qualifying will be placed to
last in that event. Cars found under the minimum total weight rule after the
feature event will be penalized one (1) position per pound under.
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 7/16” dia. (minimum) grade 8 bolts and locking nuts.
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
A commercially manufactured,
SFI rated nylon window net must be installed in the drivers side door window
opening. It must be positioned to cover the entire window opening. Window nets
may not be used beyond three (3) years
from the date of manufacture. The window net 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 net size must be must be 22 inches wide by 16 inches high. All window
net 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 net must fit tight and be secured with a lever-type quick release latch.
The lever must be secured by a detent ball in the lever and may be supplemented
by Velcro® fastener only – pins or clips are not permitted. The latch must
mount at the top in the front to roof bar (#3) and release from the inside.
20E-
3.2.5 REAR VIEW MIRROR
One (1) single image 8” x 2”
rear view mirror mounted in the center of the upper windshield is permitted. If
you use a head and neck restraint system, you may run a 14 "x 2
"mirror. Side view or spot mirrors are permitted. Oversized mirrors maybe
blacked out by the use of paint only, to obtain the correct size allowed.
20E-
3.5 DOORS
All door panels must be made
of magnetic sheet steel and or Aluminum. For additional specifications see the
NASCAR rulebook.
20E-
3.6 QUARTER PANELS
All quarter panels must be
made of magnetic sheet steel and or Aluminum. For additional specifications see
the NASCAR rule book.
20E- 3.8 HOODS / ROOF
C. All roof panels must be made of magnetic sheet steel.
For additional specifications
on letters A. B. D. E. and F. see the NASCAR rule book.
20E-
3.11 IDENTIFICATION
All car number
configuration and design is subject to approval by SMS Officials. Only single
or double-digit numbers will be permitted. The size, color, and style of
numbers must be adequate to permit prompt identification by SMS Officials at
all times. Numbers must be solid color, at least 18 inches high, measured
vertically, excluding borders and silhouettes, must be neatly attached to or
painted on both sides of the car on the center of the door. Door numbers must
be a minimum of four (4) inches in width, and slant no more than 30 degrees
from vertical. The tops and bottoms of all numbers must be even (not
staggered). Two (2) digit numbers must not overlap and must have a minimum of ¾
inch separation. A solid number 18 inches high, excluding borders and
silhouettes, must be neatly attached to or painted on the roof, reading from
the passenger side. A solid number a minimum of 12 inches high, excluding
borders and silhouettes reading from the passenger side neatly attached to or
painted at a 45 degree angle on the right front corner of the roof is also
acceptable. Solid numbers, as large as possible, must be attached to or painted
on the right outer nose and taillight covers. The use of number decals is acceptable
if SMS Officials determine that the number is legible. Mirror foil numbers and
decals will not be permitted. Paint schemes using a mirrored or holographic
appearance will not be permitted.
20E-
5 GENERAL ENGINE REQUIREMENTS
A 602 spec motor based on the GM Performance Factory Sealed Circle
Track Crate Engine is the only engine permitted. The engine that must be used
is the GM Part Number 88958602 GMR 350/350 Circle Track Engine with specific
modifications that can be done only through an SMS approved service center. The
engines will be inspected and resealed upon completion by SMS Officials. All
engine seals must remain intact and un-tampered with. Any service work
requiring the removal of any seal bolts must also be scheduled with, and
approved by SMS Officials before the seal bolts are tampered with. Tampering
with seals will result in penalties and loss of eligibility of the engine to
compete in the SK Light division. NOTE: All engines must be sealed and
documented to compete at SMS. All of the parts specified and/or that come stock
OEM on these engines must remain as delivered, with no modifications or
alterations of any kind. Engines may not be disassembled without being in need
of repair
The
maximum static compression permitted is 9.3 to 1. Any engine measured over 9.3
to 1 is illegal and will not be allowed to compete until serviced by an SMS
authorized service center.
SMS
approved service centers for the GM Performance Factory Sealed Circle Track
Spec Engines are:
R.A.D. Auto Machine Ludlow
MA 1-413-583-4414
T/A Engines Plainville,
CT 1-860-747-6713
Please
call our authorized SMS service centers or email the SMS technical staff at j3ams@comcast.net with any questions on
these rules.
SS
20E- 5-A GENERAL SPEC ENGINE REQUIREMENTS
The detailed parts and labor list are furnished to our
two SMS approved service centers.
OP
20E- 5-B - DETAILED OPTIONAL SMS 602 SPEC/Crate ENGINE REQUIREMENTS
The limited detailed parts and labor list are furnished to our two SMS approved service centers. This Engine is allowed no internal changes. When this Engine is spec serviced it will be converted to the A type Engine (EIRI), and will need to carry the extra 50 pounds.
20E-
5.10-A CARBURETOR – The only approved carburetor
shall be the Holley two-barrel model #4412. All parts must be a Holley
manufactured part for the 4412 model. Only Holley replacement or service parts
can be used in any carburetor rework. Carburetors and/or carburetor components
machined from billet materials will not be permitted. No polishing,
grinding or reshaping of any part is permitted.
(1) Body of Carburetor: No
polishing, grinding or reshaping of any part. Drilling of additional holes or
plugging holes is not permitted.
The diameter of every hole in
carburetor must pass the standard NASCAR /SMS pin and tooling gauges as part of
our routine tech process.
(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: The stock Holley 4412 or Stainless Steel
Holly part #346 butterflies must be used. They may not be thinned or tapered.
The Butterflies must remain as manufactured, and must maintain the Holley
production tolerance thickness of .0438” to .0398”. 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- 5.10.4 CARBURETOR ADAPTER
The Canton Racing Products
aluminum adapter plate part number 85065A must be used. Alterations of any kind
to the adapter plate are not permitted.
20E-
5.12.1 CARBURETOR AIR FILTER / AIR FILTER HOUSING
A. Only a round dry type paper air filters elements
maintaining a minimum 12 inches and maximum 14 inches diameter is permitted. The
air filter element must be a minimum of 1-1/2
inches, maximum five (5) inches in height. All air must be filtered
through the element.
B. Only a round, magnetic steel or aluminum filter
housing is 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 top and bottom must be the same diameter. The air filter
housing must be centered and sit 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 is permitted.
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 SMS Officials.
F. Adjustable timing controls are not permitted.
G. Retard or ignition delay devices are not be
permitted.
H. An MSD # 8728
External RPM limiter with a 6000-RPM chip is mandatory. The violet wire
of the MSD # 8728 must be cut back flush to the units housing. The green and
the white wires of the MSD # 8728 must run directly to the coil negative. The
MSD # 8728 must be mounted on the engine side of the firewall in plane view. SMS
Officials may require the replacement of the 6000-RPM chip with an SMS supplied chip at any time during an
event. RPM limiters must be fully functional and operational at all times.
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.
20E
- 6.3 ALTERNATOR
A functioning 12-volt single alternator system with an internal
voltage regulator and one (1) output wire must be used. External voltage
regulators are not permitted. The alternator must be mounted on the front of
the engine. Only standard production V-type or flat type V-ribbed alternator
drive belts will be permitted.
20E-
6.5 BATTERY
Only a single 12-volt OEM
automotive type or an automotive type gel-battery is 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 SMS Officials.
20E-
6.7.1 RADIOS
Monitoring of SMS Race
Control is mandatory. Two-way radios or scanners are not permitted in the car
or on the driver at any time. Only SMS approved receivers, set to receive SMS
Race Control transmissions on frequency 461.1375 are permitted. The only SMS
approved devices are RELIANT R416 receivers, Raceceiver Microscanner, or
Victory GT-18, and must be mounted in plain view for inspection on the back of
the drivers seat. Racing Electronics is the only authorized distributor /
programmer of the RELIANT R416 receivers and Victory GT-18.
NOTE: The RELIANT R416 model is no
longer available brand new from Racing Electronics, the Victory GT-18 model has
replaced the RELIANT R416. The RELIANT R416 model is still an approved receiver
for use at Stafford Motor Speedway.
Track
Frequency Channel SK Light - 461.13750
Racing
Electronics www.racingelectronics.com
800-272-7111
20E-
6.7.3 TRANSPONDERS
Transponders are required on
the cars at all times. See SMS Track Rules section for locating transponders
properly. Any car not registering a transponder signal during practice will be
black-flagged to be made aware of their scoring transponder’s failure and is
required to remedy it before proceeding further in the event.
MYLAPS
AMERICA
32
Highlands Parkway, Suite 104
Smyrna,
GA 30082
Tel
678-816-4000 Fax 678-816-4001
20E-
7 ENGINE COOLING SYSTEM
Only water or SMS approved
coolants or additives may be used in the cooling systems.
20E-
7.1 WATER PUMP
Steel or aluminum OEM type
mechanical pump must be used. Combination water pump/alternator units are not
permitted. Any serpentine, cog or V-belt pulley system is permitted.
20E-
8 ENGINE OIL SPECIFICATIONS
The use of combustion
enhancing oils or additives is not permitted.
20E-
9 ENGINE EXHAUST SYSTEM
A. The following part numbers are the only headers
permitted. All headers must remain un-altered and exactly match the SMS factory
sample headers.
Troyer Chassis - Kooks # SMS1033 or Flowrite #SMS 25
Raceworks Chassis - Kooks # SMS1033 or Flowrite #SMS 45
Chassis Dynamics Chassis -
Kooks # SMS1435 or Flowrite #SM S35
SPAFCO Chassis - Flowrite #SMS 55
B. The exhaust header flange must mount directly to the
cylinder head with no spacers between the flange and the cylinder head. A
maximum header flange thickness of ½ inch is permitted.
C. Inserts are not permitted in any part of the header or
collector. Merge, crossover and pyramid collectors are not permitted.
D. Exhaust pipes must come out of engine at cowl and must
extend a minimum of six (6) inches past the cowl. Right exhaust pipe may run
beneath the car, but must turn down and out toward the bottom of the right side
frame rail.
E. LOBAK # RCM 30-12-30, LOBAK #35-12-35, Kooks
#R300-10, or Flowrite P/N FR300
mufflers are required at all times. Modifications or repairs of any type are
not permitted on the muffler. Both muffler flanges must be intact. Mufflers
must be removable for inspection.
NOTE: The life expectancy for all Lobak mufflers is
two years. All owners are responsible to make sure their mufflers are in proper
working order. If found not to be, the muffler will be deemed illegal (i.e.
missing one or more of the internal baffles.
F. Thermal wrap is not permitted anywhere on exhaust
system.
G. Only one muffler and
exhaust pipe allowed per side.
H. Exhaust system subject to approval by SMS Officials.
I. Interior coatings are not
permitted.
J. Exterior coatings other than paint are not permitted.
All other coatings including powder coatings are not permitted.
20E-
10 ENGINE DRIVE TRAIN - FLYWHEEL AND CLUTCH
Stock OEM dimension steel
flywheel for engine type. OEM type steel pressure plate and steel disc only.
Solid type disc only, no paddle or button type discs. Minimum 10" clutch
and pressure plate. Drilling or lightening of any part is not permitted. Steel
bolts only. Flat surface machining allowed only on the face of the flywheel,
any cutting on the backside of the flywheel will deem the part illegal.
The following weights are the
minimum allowed for each part:
Flywheel
only (no bolts) 14.5 LBS.
Pressure
plate, Cover, & Solid Disc 16 LBS.
The
steel solid disc (no bolts) must maintain a minimum weight of 2.5 pounds and a
maximum weight of 3.8 pounds after the combined weight has been determined.
20E-
10.3 BELL HOUSING
Only a special production all
magnetic steel bell housing can be used. The bell housing must enclose the
flywheel 360 degrees with minimum ¼ inch magnetic steel. Any changes to the
bell housing must be made with ¼ inch magnetic steel and welded in place. All
welds must be done inside and outside of the bell housing. No bolt on pieces.
An opening no larger than 3 ½ x 4 inches may be used for throw out bearing
access. This hole may be covered with sheet metal.
20E-
10.4 TRANSMISSION
A. Only OEM production stock 3 & 4 speed
transmissions will be permitted. Top loader transmissions are not permitted.
Gear ratio must be of stock OEM production.
B. Only stock O.E.M. factory housings will be permitted.
C. Only OEM type, steel, angle cut forward gears are
permitted. Square cut forward gears are not permitted.
D. Removal of first gear or replacement of first gear
with a metal spacer, in 4-speed transmissions is permitted. All other forward
and reverse gears must be in working order, and they must be operational from
inside the driver’s compartment. All transmissions must have a constant
engagement of the input shaft with gear and countershaft with cluster gears.
E. Five-speed transmissions, with gears removed are not
permitted.
F. Quick change transmissions are not permitted.
G. Automatic or semi-automatic transmissions are not
permitted.
H. Machining or lightening of any internal rotating or
non-rotating parts including gears, shafts and case is not permitted. Gun
drilled transmission shafts are not be permitted. Welding on any internal part
is not permitted.
I. Additional or different from OEM bearings other than
the tail-shaft, which may have roller bearings, is not permitted.
J. Auxiliary, over or under drive transmissions are not
permitted. High gear must have a ratio of 1 to 1 and no other gear may have a
ratio higher than 1.20 to 1.
20E-
10.6 REAR AXLE
A. A standard weight/manufactured quick-change or
straight rear end may be used. Ultra-light or lightweight rear ends or
components are not permitted.
E. Only magnetic steel axles, bearings, and axle
housings are allowed.
E-1. All axles must be a minimum of 7.00 pounds.
L. Standard ten (10) inch ring gear rear end must be
used.
M. Thermal dispersant coatings are not permitted.
N. Lightened, ultra-light, EDM, scalloped, back-cut,
ring gears are not permitted.
GEAR RULE - 4:12 MAXIMUM FOR STRAIGHT
REARS, 4:26 MAXIMUM FOR QUICK CHANGE REARS.
Rear ends and components will
be weighed as part of post race tech.
20E-
10.8 TIRES -
HOOSIER Tire East of Manchester,
Connecticut will be the sole supplier of tires for the SK Light Modified
Division. The size and compound numbers are 26.0/13.0-15 M45 on the left side and 27.0/13-15 M46 on the right side.
Initial purchases of Tires prior to the first scheduled race of the season may
be made at Hoosier Tire East. After that all tires used at SMS must be
purchased at the track on race day. Each tire will carry a special bar coded
serial number. The legibility of the bar code is the sole responsibility of
the team. This number will be
scanned and entered into a database designating it as a tire for use at SMS.
Each scanned serial number will be placed on a Tire Inventory Card that will be
assigned to the driver that the tires have been purchased for. In the event a
driver changes cars for practice, heat, consi, or feature racing, his/her tire
inventory must accompany him/her to the new car. Each driver must update and
return a Tire Inventory Card to the Tire Delegate for each race they attend.
For the first race of the season, SK Light Modified drivers will be allowed a
maximum of eight (8) tires in their inventory. For each completed event
attended an SK Light Modified driver will be issued one (1) tire credit for use
at any future event. The amount of extra tires allowed for longer distance
events (100/150 Laps), will be determined by SMS Officials and announced in a
timely manner. After a designated number of weeks into the season and at the
discretion of the SMS Officials, any new driver will only be allowed to start
their season off with four (4) new tires in the SK Light Division. Drivers can
then purchase one (1) tire per event for the SK Light Modifieds. SMS Officials,
at their discretion, may change or amend this rule at any time. If for any
reason the SMS Officials cannot identify a tire, the tire will be deemed an
illegal part and the driver may become subject to a penalty (EIRI).
The JTR Eagle PPM Tester will
be set at a fixed level and will be strictly enforced throughout the 2013
season.
20E-
10.8.1 PHYSICAL REQUIREMENTS
E. Minimum circumference of the right rear tire @ 20 psi. is 84".
F. Minimum tire pressures for all inspection purposes
are ten (10) psi for both left side
tires and fifteen (15) psi for both right side tires. Air may be added
to the tires to achieve only the minimum tire pressures during inspections, per
an SMS provided tire pressure gauge.
NOTICE: A participant competing in any race at SMS
specifically agrees that he/she acknowledges it is illegal to soak or treat
racing tires and that said soaking or treatment of racing tires is against EPA
regulations and further contains carcinogens and hazardous material which are unfit
for his/her health and the health of all competitors and spectators. Any
participant found violating the rule is subject to suspension.
20E-
12.3 COIL OVER SHOCKS
A. The SK Light Modified division must utilize the track
specified shocks only. Shocks are subject to dyno verification and must be
within the manufacture’s tolerance limits for each part number. Shocks must
remain as manufactured with no alterations of any kind.
B. The SK Light Modified track approved shocks are:
Pro
Shocks # TA55½B Front
Pro
Shocks # TA74½B Rear
20E-
12.5 SPINDLES, WHEEL BEARINGS and HUBS
Front spindles must be linked
to frame per NASCAR rule book.
E. Oil filling of any spindles, wheel bearings or hubs
is not permitted.
F. Low drag spindle or hub kits (oil filled hubs, oiled bearings, low friction bearings, non steel bearings, coated or polished spindles, bearings or races) will not be permitted.
20E-
12.8.2 GROUND CLEARANCE REQUIREMENTS
The frame rail and sheet
metal ground clearance is a minimum of two
(2) inches. All ground clearance requirements are measured with the
driver in the car. Frame heights will no longer be checked at the conclusion of
feature events. The frame heights will
be checked prior to the start of heat races and prior to the start of the
feature.
20E-
14.1 BRAKE COMPONENTS
A. Four wheel disk brakes mandatory. Only magnetic cast
iron or cast steel round circular rotors permitted. Only metal brake calipers
will be permitted. Drilled, slotted, or grooved rotors are not permitted. Only
factory dust cleanouts are permitted. Dust cleanouts may not exceed .038 in
depth. If the dust cleanout exceeds .038 in depth, the rotor is illegal. The
brake rotors must be bolted to the hubs. Floating brake rotors are not
permitted
J. Brake calipers with a maximum of four (4) pistons
are permitted. Each brake caliper’s pistons must all be of equal size.
K. All rotors and brake components subject to SMS
Officials approval.
No AP racing or any other
caliper that exceeds a racer net of
$265.00 will be allowed.
20E-
14.2 - BRAKE COOLING
Electric blowers are not
permitted for cooling purposes in brake duct systems. Additionally electric
blowers are not permitted anywhere on the car for cooling (i.e. brakes, rear
end, etc.).
20E-
15 FUEL SPECIFICATIONS
Brand Name Grade of Fuel
Sunoco Race Fuel 260 GTX*
*Sunoco Race Fuel is available at SMS.
SMS Officials will take fuel samples as part of the normal technical inspection process.
B. Icing or cooling of the fuel system is not permitted on SMS property.
C. SMS Officials will take fuel samples as part of the normal technical inspection process.
D. Nothing may be placed in the fuel line other than a standard fuel filter. The use of any type of fuel catalyst or other fuel-altering devices is prohibited.
20E-
16 FUEL SYSTEM
See NASCAR Rule Book
20E- 16.1 FUEL CELL
Must meet NASCAR
specifications with a fuel cell bladder made of a material that returns to its
original size and shape after deformation. Rotational molded bladders are not
permitted. It is highly recommended
that the fuel cell bladder be no more than six (6) years old. Competitor
must provide bladder model, serial number and date(s) to SMS Officials before
competing. If a gas cap is used it must be painted white with the car number on
it for identification. For additional specifications see the NASCAR Rulebook.
The minimum requirement for approved fuel cells at SMS are as follows: ATL Super Cell "100" FB1 - Series
Bladders. (Note: the complete cell will be the SU1- Series), and the Fuel Safe
Sportsman Cell (SM Series). Any cell that is rated above these cells (ATL 200
& 500 series), and the Fuel Safe Pro Cell (PC Series), will also be
approved for competition at SMS.
20E-
16.2 FUEL CELL CONTAINER INSTALLATION
See
NASCAR rule book
20E- 16.4 FUEL
FILLER / VENT REQUIREMENTS
See
NASCAR rule book
20E-
16.20E- 16.3 FUEL CELL / FUEL CELL CONTAINER INSTALLATION
5.3
FUEL SHUT-OFF
A 1/4-turn fuel shut-off
valve of minimum 3/8-inch NPT with minimum 4-inch handle is required in the
fuel line. The fuel shut-off valve must be located 8-inches inboard of the
passenger side frame rail’s outside edge and 24-inches forward of the main roll
bar (#1 bar). The fuel shut-off valve must be mounted securely to the under
side of the driver’s compartment sheet metal. The fuel shut-off valve shank
must protrude through a maximum 1-inch
diameter hole in the sheet metal to the interior of the driver’s compartment.
The fuel shut-off valve handle must be parallel with the sheet metal that the
valve is mounted to. The fuel shut-off valve handle must be a minimum of
4-inches in length, red in color with a minimum of 1-inch clearance from the
sheet metal throughout its full travel. A minimum 6-inch by 6-inch square area must be painted white with
the fuel shut-off valve’s ON and OFF positions clearly labeled with 1/2-inch
tall, black in color lettering. The shut-off valve must rotate clockwise from a
ON position with the handle parallel with the frame rail, pointing towards the
rear of the car, to the OFF position with the handle perpendicular to the frame
rail pointing toward the driver.
NOTICE – Competitors are solely and directly responsible for
the safely of their race cars and racing equipment and are obligated to perform
their duties (whether as a car owner driver or crew members) in a manner
designed to minimize to the degree possible the risk of injury to themselves
and others.
20E - 18 ROLL BAR RULE
(8) (A) The door bars (#9 A & B), on both the
left and right sides, must have a minimum of four (4) bars equally spaced from
top to bottom that must be welded horizontally between the vertical uprights of
the main roll bar (#1) and the front roll bar legs (#2 A & B). The top door
bar on each side must maintain a minimum vertical height of 15-1/2 inches from
the top of the main frame rails to its centerline and match up with the
intersection of the dash panel bar (#8) at the roll bar legs (#2A & #2B) at
the front and the intersection of the horizontal shoulder bar (#7) at the main
roll bar (#1) at the rear. All door bars must be convex in shape. The door bars
(#9 A & B) must have a minimum of six (6) vertical supports per side with
two (2) equally spaced between each door bar. These supports must be made from
a minimum of 1-3/4 inches by 0.090 inch wall thickness magnetic steel seamless
round tubing (not numbered but shown in the left side view of diagram #3).
Right side door bars must cover a minimum of 25 inches of door length and may
be either four (4) horizontal bars with six (6) vertical studs or two (2)
horizontal bars and two (2) bars configured in an X design. If the X design is
used, a vertical bar must connect through the center of the X from the top
horizontal bar to the frame.
(B) A 13 gage
(0.0897 inch thick) magnetic steel anti-intrusion plate(s) must be
securely welded to the outside of the left side door bars. The anti-intrusion
plate(s) must fill the area between the horizontal centerlines of the top and
bottom door bars, and vertical centerlines of main roll bar (#1), and the left
front roll bar leg (#2A). The plate(s) must be formed to match the curvature of
the door bars. Plate(s) welded between the vertical upright bars should be as
large as possible. All plate(s) must have the corners welded with one (1) inch of weld followed by a
maximum of three (3) inches of
surface not welded and followed again by a minimum one (1) inch weld. To facilitate emergency removal of the left
side door bars (#9A), the anti-intrusion plate must have six (6), 2-1/8 inch diameter holes cut in the anti-intrusion
plate, with three (3) holes
forward of the front vertical supports and three (3) holes rearward of the rear vertical supports in the
following locations: The upper two (2)
holes must be centered vertically between the left side door bars
(#9A-1&2), at an on-center distance of
three (3) inches from the center of the front vertical support and the
rear vertical support. The middle two
(2) holes must be centered vertically between the left side door bars
(#9A-2&3), at an on-center distance of three (3) inches from the center of the front vertical support and
the rear vertical support. The lower two
(2) holes must be centered vertically between the left side door bars
(#9A-3&4), at an on-center distance of three (3) inches from the center of the front vertical support and
the rear vertical support (see Diagram #9A BELOW).
(9) All cars must have a foot protection bar acceptable to
SMS Officials installed on the left side of the roll cage. The foot protection
bar must be located at or in front of the pedal assembly, when viewed from the
side and above. The foot protection bar must be completely welded to the left
front roll bar leg (#2A) and extend forward and be completely welded to the
main frame rail or front sub-frame.
CONTINGENCIES
Contingency
Sponsors are a valuable part of the SMS program. Contingency stickers must be
displayed for either product or monetary consideration. Each division will be
notified as to what stickers are required to be eligible for contingency
rewards. In particular, the decals must be mounted on the driver’s side of the
car in such a manner that they are clearly visible in a photograph.
The following changes are proposed for the SK Modified® division at Stafford Motor
Speedway in
2014 per the NASCAR Whelen Modified Tour Rulebook.
- *Body Offset: 11-1/2 inch maximum from
outer frame rail to RR quarter panel assembly is permitted. The quarter
panel assembly cannot extend beyond the RR inside tire contact patch.
- *Flat Windshields: ¼ inch flat
polycarbonate must be used, and it must extend from the left A-pillar to
the #4A center windshield bar and from the roof to the cowl. A minimum of
three non winged type Dzus fasteners must be used on each side (front,
left, right and bottom).
- *Shock Covers or Shrouds: No covers or
aerodynamic type shrouds will be allowed over the front shock towers.
- *Inner "Rocker" Panel: An
inner panel (.040 aluminum or magnetic sheet steel) must be installed on
the left side and run from left main frame rail to the door and extend
from the front fire wall to the rearward to the rear firewall (behind the
driver's seat)
- *Aluminum crush panels: Must be
installed at the front and rear firewalls and extend outward to the left
side door panel and extend upward from the inner panel to the top of the
left side door panel.
- *Batteries: Gel or glass mat type only
with a minimum weight of 17 lbs.
- *Rear Center Panel (panel over the fuel
cell): Must be magnetic sheet steel, 22 gauge, .031 thick, with a minimum
width of 28 inches, and must extend from the rear vertical panel forward
to the #7 bar.
- *Rear spoiler must attach where the rear
vertical panel meets the rear center panel.
- *Shift lever and shift rods must be made
of aluminum or steel.
- *Only single stage master cylinders are
permitted.