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Williams Grove Speedway 2012
410 Sprint Car
Rules & Regulations
***Please note changes for the 2012 season will be in
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2012 410 SPRINT CAR SPEC
A sprint car is defined as a racing vehicle of single seat
design, built up on a racing chassis and mounted on four (4) racing wheels. No
rear engine cars or aluminum frames allowed. No boxed tubing frame rails.
Driver’s compartment shall be separated from the engine by a firewall of
suitable material. All cars must weigh a minimum of
1,400 pounds with
driver following the completion of any event. Bolt on weight
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. Weight cannot be added, moved or replaced during yellow
or red flag conditions. If a car fails to go directly to the
scales when required to do so, that car will be disqualified.
Bodies —
The body should give the appearance of completely covering
the car’s frame and should be fully painted.
All cars must run a full sprint appearing hood. Hood must
extend to the front torsion tubes or a similar location on coil-over cars. The
maximum outside hood width will be 30 inches. The hood may be a multiple piece
design, but visually, it must appear to be one continuous piece in
side-to-side and front-to-back manner. The maximum depth
of the arc (belly at the front of the nose-piece when measured from
a perpendicular point across the flat plane on the top of the nose
piece will be 5.50" - inches. Hoods are mandatory during racing.
One-piece tail and fuel tanks are allowed, but must be
streamlined. No side foils, rudders or panels are to extend beyond rear cage on
any side, no body pieces to extend beyond or underneath front torsion tube
except hood. No Wedges or foils underneath racecar. Side body panel designs or
concave surfaces that, in the sole discretion of the Williams Grove Speedway
Officials, are intended to trap, alter or direct air flow for the purpose of
gaining an aerodynamic performance advantage will not be permitted.
Safety bar(s) and/or arm
guard paneling that protrude outward from the frame
rails for the purpose of creating room for the driver
will be permitted. The guard(s) and/or paneling will be
permitted to extend a maximum of 7"-inches as measured
from the outside edge of the middle frame rails and must
remain above the middle frame rail. The sole purpose of
this area is creating elbow room for the driver. The
elbow room must remain above the upper "middle" frame
rail and may not extend rearward of the leading edge of
the rear axle."
Any new body
designs including, but not limited to side body panels, hood design, nose pieces
and/or any other part of the exterior body must be approved by the Williams
Grove Speedway Officials prior to being introduced to competition. No gurney
lips or turnouts are allowed on any body panels.
Radius rod
protectors will be permitted. The maximum protector vertical
opening will be 10 inches in height and 24 inches long and it must
not extend more than 3 1/2 inches from the outside edge of the
bottom frame rails.
A maximum 1 1/2 inch wide by 20 inch
long exhaust fume deflector, located on the bottom side-body panel
at the rear edge will be permitted. The turnout angle must not
exceed 90 degrees. A 1" x 4" turnout on forward cockpit L side
panel for fume deflector.
Bumpers, Nerf Bars & Front Axles —
No TITANIUM, only nerf bars and bumpers made of steel at
least one-inch in diameter will be allowed. Nerf bars, which offer adequate
protection in the event contact with another car, are mandatory. Nerf bars must
be bolted or roll pinned to the vehicle.
No pop rivets may be used to fasten nerf bars, bumpers or
wings. Nerf bars may not extend past outside of tires. Maximum 8" front bumper
or 23½ inches from the center of the front axle to front of bumper.
Rear bumper minimum thickness of .065".
Only steel front axles are allowed. Minimum sizes: 2" x .156,
2¼ x .120 or 2 3/8" x .095.
No front anti-roll bars are allowed.
Chassis —
Roll cage to be constructed to provide maximum protection.
Gussets should be used in the driver’s compartment. The roll cage must be
constructed high enough to cover the driver’s helmeted head. No elliptical
tubing used on or as part of the main frame structure.
The driver’s right side opening must be a minimum of 10
vertical inches and 21 horizontal inches at all point.
Maximum wheel base of 90 inches, minimum wheel base of 83
inches.
Floor pans must be either aluminum or steel.
All cars must utilize either a drive line strap or a
driveline hoop restraint constructed of .065 steel either welded or bolted to
the chassis. Metal hoop restraints must react positively to magnet testing. The
rear cross member used for mounting the steel driveline hoop must be constructed
of .083 steel.
Drag links must utilize 4130 steel of at least 1" in diameter
and a minimum wall thickness of .058. Tie rods and heim ends must be made of
steel only. A magnet must stick at all times. No swedging of the tubing will be
allowed.
Drag link must be tethered to the frame.
NO Cockpit adjustables (Wing sliders exempt).
The top of the roll cage shall have a maximum outside width
of 29 ½ inches.
The cockpit horizontal middle frame bar will have a maximum
outside width of 27 inches.
The bottom frame rail will have a maximum outside width of 26
½ inches.
Any frame manufactured with safety bars or arm guards that
protrude outward from the frame rails for the purpose of creating room for the
driver will be permitted. The guards and/or panels must not extend more than 7
inches from the outside edge of the middle frame rails and must remain above the
middle frame rail.
Radius rod protectors will be permitted. The maximum
protector vertical opening will be 10 inches in height by 24 inches long and it
must not extend more than 3 ½ inches from the outside edge of the bottom frame
rails.
A maximum of 1 ½ inch wide by 20 inch long exhaust fume
deflector, located on the bottom side-body panel at the rear edge will be
permitted. The turnout angle must not exceed 90 degrees.
All other side paneling must be fabricated flat and must not
extend past the outside edge of the frame rails more than the thickness of the
paneling material.
All seat belt mounting
brackets must be fabricated from magnetic steel.
Aluminum and/or any other materials will not be
permitted.
Engines and Driveline ––
Maximum engine size is 410 cubic inches and all engine
cylinders must be machined from steel alloy only. Only (2) valves and (1) spark
plug allowed per cylinder. Double overhead cam engines are not permitted. No
turbine driven engines, turbos or superchargers and no offset engines are
allowed. No direct drives, no big blocks and no computer operated or controlled
parts such as fuel injections and fuel systems.
No titanium rods, rod caps, crankshafts or headers allowed.
Connecting rods must be 100% steel. There must be an inspection plug in the oil
pan using either a #12AN fitting or a one inch pipe plug. If car is to be
inspected and there is no inspection plug, oil pan will be removed for
inspection.
The Brodix BD 2000 head and front mad drive block are
illegal.
Only 16 fuel nozzles, utilizing two (2) per cylinder will be
permitted. One (1) nozzle must be placed in the cylinder head and one (1) nozzle
must be place in the injector.
Fuel and Cells ––
Approved fuel bladders are required and there must be a solid
cover over the bladder. Fuel tanks cannot be altered or modified and must be
one-piece construction of cross-link polyethylene plastic.
No carbon fiber fuel tanks.
No fuel additives – including but not limited to nitro, nitro
methane, or nitrous oxide injection – are allowed. Only pure methanol or other
approved fuels may be used.
Miscellaneous ––
No two-way radios or other means of electronic
communications.
No mirrors of any kind may be used.
Drilling of any bolts, fasteners or heim ends is prohibited.
No hollow fasteners allowed.
The use of electronic logic processors (this includes
traction control devices) to control any function of the race car, and/or any
system for continuous gathering of data from any function of the race car for
which intended use is computer downloading, is strictly prohibited. (Penalty:
Loss of Driver/Owner points for the year and loss of earning for the event
infraction was detected).
One way radios are mandatory at all times when you are on the
track. Failure to comply will result in a penalty of two (2) weeks to the rear
of the next two heat races.
Tires and Wheels ––
The same right rear tire must be used for the entire racing
program including heat and feature events. Cars qualifying through the
Consolation or B-Main may use a different tire for that event but must use their
heat tire for the feature.
- Tire Change between events
Car to be placed at the rear of the starting line-up for the
next race. Tire compound MAY BE CHANGED.
- All time trial programs will require teams to use the same
tire for all
qualifying events, but a new tire may be used for the
feature. Tire compound MAY BE CHANGED for feature.
- One-time exemption
Each team will receive one exemption (WG sanctioned races)
for a tire change occurring after a qualifying event. When taking this
exemption, (a WG official must be notified prior to tire change). The same
manufacturer and compound MUST BE USED.
- One tire per show rule is not in effect for day shows.
- Any brand tires allowed for
front.
- Goodyear tires are mandatory for left & right rear
Size Soft To Harder
FRONTS 100 200 400
Front 84.0/8.0 – 15 D2591 D2592 D2594
Matl. No. 206540 206551
REARS G100 G200 G300 G400
LR 91.0/15-15
LR 93.0/15.0 – 15 D3031 D3032 D3033
Matl. No. 216164 216165 216248
LR 95.0/15.0 – 15 D3041 D3042 D3043
Matl. No. 216166 216167 216322
LR 97.0/15.0 – 15 D3051 D3052 D3053
Matl. No. 216251 216252 216267
RR 105.0/17.0 – 15 D3101 D3102 D3103 D3104
Matl. No. 216253 216254 216255 216273
Maximum wheel diameter is 15 inches. Right rear wheel max.
width is 18 inches and left rear max. is 15 inches. No plastic wheels. Wheel
covers must be fastened securely.
The altering of any tire compound, by any means will not be
permitted.
Chemical alteration of the tread carcass and/or tread compound, such
as tire ‘soaking’ and or the introduction of tread ‘softener’ and/or
the physical
defacement (removal, altering and/or covering) of tire sidewall
markings in any
manner will not be permitted, unless approved by a Williams Grove
Official.
TOP WING
a) Center Foil maximum size of 25 square feet
with a maximum width of 60 inches. Center Foil must be square or
rectangular in shape with all 4 corners set at 90 degree angles with
no variance allowed. Center foil top is to be flat from front to
back and side to side.
b) Center Foil shall be fully sheathed in
aluminum. Vent holes, dimples, ridges, etc. are strictly prohibited
anywhere on the wing.
c) Maximum 1" removable wicker bill may be
mounted on the rear edge of the center foil. Wicker bill must be 90
degrees to the top of the center foil. No built-in wicker bills or
gurney lips allowed. Maximum dimension of wicker bill may change
periodically.
d) The top wing can be cockpit/driver adjustable.
Other than the slider mechanism, no moving parts permitted on or in
foil structure. Only one slider mechanism allowed on top wing,
allowing adjustment forward and backwards only.
e) Center foil thickness cannot exceed 9 inches.
Underneath side of center foil must appear to be a continuous smooth
arc with no recesses, concaves, or protrusions. Center Foil must be
one-piece construction. No split or bi-wings will be permitted.
Wings must be fabricated of metal alloys only. No fiberglass, carbon
fiber or other similar material may be used in the basic framework
of the wings. Top wing must not extend beyond outside of rear tires.
f) No foils or rudders will be permitted anywhere
on the top wing.
FRONT WING
a) Center Foil maximum size of 6 square feet with
a maximum width of 36 inches. Center Foil must be square or
rectangular in shape with all four corners set at 90° angles.
b) Center Foil shall be fully sheathed in
aluminum. Vent holes, dimples, ridges, etc. are strictly prohibited
anywhere on the wing.
c) A maximum 1" removable wicker bill may be
mounted on the rear edge of the center foil. Wicker bill must be 90
degrees to the top of the center foil. No built-in wicker bills or
gurney lips allowed. Maximum dimension of wicker bill may change
periodically.
d) Maximum distance from the Center Foil front
edge to the front edge of the front axle may not exceed 20 inches.
e) The Center Foil front edge must remain at
least 1 inch behind the front edge of the front bumper. Center Foil
top surface from side to side must remain flat.
f) Center Foil must be one piece. No split or
bi-wings will be permitted.
g) Wings must be fabricated of metal alloys only.
No fiberglass, carbon fiber or other similar material may be used in
the basic framework of the wings.
h) The Front Wing must not extend beyond outside
of front tires. The Front Wing may not be cockpit or driver
adjustable while the car is stationary or in motion.
i) No moving parts permitted on or in foil
structure. No rudders or fins allowed.
j) The 5" section located at the rear of the
front foil must not have a belly/curl arc that is out of proportion
with the rest of the front foil. As measured on a 5-inch straight
edge, the belly at 2 ½ inches from the rear of the foil may not be
deeper than 3/8 inch. There is zero tolerance on this 3/8 inch
depth. It is suggested that the wing blue print specify 11/32 inch
depth, so that if any deflection or movement of the wing occurs, the
depth will not exceed the 3/8 inch specification (This 3/8 inch
measurement ensures that the belly/curl arc is gradual).
k) The belly/curl arc must span the entire length
of the front foil and appear to be a gradual arc with the deepest
point, no further back than 12 inches from the leading edge. The
belly/curl arc must start at the front foil’s leading edge and shall
not exceed a depth of 2 inches. Front foil thickness cannot exceed
3.6 inches.
SIDE BOARD PANELS
a) All braces or supports shall be oriented thin
edge to face the air stream. Only rectangular, round or oval metal
braces not exceeding 1 inch in width may be used. No adjustable
bracing allowed.
b) No aero elliptical brace material permitted.
c) No brace or support shall resemble a wicker
bill or a split wing.
d) Side boards must be mounted square to the
center foil and parallel to each other. No kick-out allowed.
FRONT
e) Front side boards maximum 12 inches tall and
26 inches long with no more than one inch overhang from the center
foil front edge to the side board front edge.
f) Side boards may have front, back, top and
bottom turnouts of no more than ½ inch.
TOP
g) Top wing side boards maximum size, 72 inches
long and 30 inches tall. The top 2/3’s of each top wing side panel
shall consist of only 2 corners. Each corner shall be set at a 90
degree angle with no variance. This portion of the side panel’s
leading edge cannot be behind the center foils leading edge.
h) Panels must be of one-piece construction.
i) Panels must be fabricated flat. Turnouts on
all edges of the wing must not exceed 1 1/4" x 1 1/4" and must be
orientated at a 90 degree angle to the flat portion of the side
panel.
Suggested Safety Equipment ––
A. Arm restraints
B. Driving uniforms, flame retardant with a
minimum of two layers. Underwear, head sock, gloves, foot socks and
shoes should all be flame retardant.
C. Driver’s seat fume deflector/heat shield.
D. Fuel Shut-off Valve.
E. Full face Snell approved helmet – no more than
2 years old.
F. Head Rest Padding
G. High-back (stock car style) seats.
H. Kill switch in reach or drive.
I. Knee pads or padded steering.
J. Minimum 3 inch wide seat belts, no more than 2
years old, mounted to frame with bolts or looped over frame tubes,
belts traveling through bottom of seat. Minimum 3 inch wide shoulder
harness, double over the shoulder, military shoulder straps with
anti-sub crotch belts. Harness to go over horizontal tube located
less than three inches below the top of driver’s shoulders.
K. Neck collars.
L. Right head net or support. Head net equipped
with a quick release capability.
M. Seat mounted to the frame with a minimum of
three bolts.
N. Windshield screens are highly suggested with a
minimum of .090 screens.
ANY CAR, TEAM OR DRIVER NOT MEETING WILLIAMS GROVE SPEEDWAY
SPECIFICATIONS, OR STANDARD RACING SAFETY PROCEDURES AND EQUIPMENT, IS SUBJECT
TO AUTOMATIC DISQUALIFICATION AND/OR PENALTIES.
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