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2012
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410 SPRINTS
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358 SPRINTS
SUPER SPORTSMAN
LATE MODELS
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Williams Grove Speedway 2012
358
Late Model Rules & Regulations
***Please note changes for the 2012 season
will be in BLUE BOLD
PDF file to print or save >>
click here
Chassis Specifications ––
1.
FRAME - Minimum wheelbase of 103 inches,
tolerance of 1/2 inch. Frame rails must be
either a minimum of 8 inches in circumference
(2x2 box) and have a wall thickness of no less
than .080 or a tube frame design with main rails
of 1-3/4 OD tubing with a minimum wall thickness
of .083. Front and rear sub-frames must be
welded, not bolted to main frame rails. Six inch
engine setback permitted measuring from base of
number one spark plug to center of the upper
ball joint. No torsion bar suspension.
2. ROLL CAGE - Roll bars to
be a boxed frame, well braced of at least 1-1/2
O.D. steel pipe or tubing, with a wall thickness
minimum of .080 DOM steel or .065 Chrome-moly
tubing allowing for manufacturers tolerance.
Driver’s side must have a minimum of four
protective sidebars, three protective bars on
the opposite side of cage. Checking of wall
thickness done by drilling a small check hole in
the pipe or tubing.
3. Good brakes and shocks
required on all four wheels, no plastic brake
lines. Steel braided fuel lines recommended.
Steel or aluminum wheels permitted, 14 inches
maximum width excluding bead lock. Any type of
upper or lower control arm may be used. Ball
joint substitution is permitted.
4. Quick change rears
permitted. Tru-track type rears permitted.
5. Cell must be encased in an
approved material. The cell should be located
far enough front of the rear bumper and support
bars to decrease the possibility of the cell
being punctured in a crash.
6. Minimum weight of car and driver
of 2375 pounds with a 25 pound tolerance after any
event. The weight to be measured by Williams Grove
Speedway scales. Maximum weight is 2900 pounds. Weight
distribution of 60% left side maximum. Any bolt on
weight must be in front of rear bumper. Must use 1/2
inch or larger bolt to fasten weight and weight must be
securely fastened. No weight added above deck. Weight
must be painted white and have the car number on weight.
7.
TIRES: Only an 11-inch Hoosier brand tire (either
Hoosier Economy or Hoosier Spec) is permitted for
competition. The largest tire permitted is the Hoosier
Economy 11 inch tire measuring 16.75 inches from
sidewall to sidewall with a 93 inch circumference. The
tires must be a 1300/D-15 or harder compound.
Body ––
BODY RULES AS PER NATIONALLY ACCEPTED
LATE MODEL RULES
Any mid sized car body with a wheelbase of more than
100 inches originally may be adapted to the 103 inch
frame. No subcompacts. No Pinto, Vega, Chevette type
body. Stock steel body must remain stock appearing.
After market body parts permitted. Limited use of lexan
permitted. Lexan can be used for front roof supports and
side panels of hatchback. Interior of car should allow
for easy access to driver from either side of car and be
clear of material or construction methods that could
cause injury to the driver. No raised edges inside of
car. Car must have a solid fire wall that meets approval
of the technical committee.
Rear spoiler
may have three 18 inch long solid supports no higher
than 8-1/2 inches off the rear deck. Spoiler supports
may not extend back beyond the rear edge of the spoiler.
Roof side panels must be similar, symmetrical and the
same length on both sides of car. Total front surface
area of spoiler not to exceed 8-1/2 inches.
Body style and nose piece to match engine type being
used.
Engines ––
1.
Engines limited to 358 cubic inches.
2. Block must be a standard
production block or approved after market block
that was less than 358 cubic inches originally.
No aluminum blocks. Chevy bow-tie block and Ford
SVO block permitted.
3. Crankshafts must be
factory production or stock dimension after
market cast iron or steel crank Stroke must
remain stock. Crank may be turned a maximum of
.040 under. No swapping of cranks. Ford SVO
crank with part number M6303-H351 permitted.
MOPAR high performance crank with part number
P4120312 permitted. All cranks must be a minimum
of 46 pounds in weight. Penalty for using a
light weight crank to be suspension for season
in addition to penalties outlined in general
rules.
4. RODS - A production rod from a V-8
engine under 358 cubic inches. Modification of rod
length prohibited. Rods, block and crank to be used in
the same combination that factory originally
manufactured. Any stock dimension steel rod (No
titanium) may be substituted. Stock dimension includes
length, wrist pin location and journal size. Approved
after market rod must be in factory condition, no
polishing or reworking. No addition or removal of metal
other than normal balancing. All 350 engines must have a
3/4 inch inspection hole in the left side of the oil pan
opposite the number one rod journal. Any windage tray
which would block the view of the rod must be removed.
Ford permitted to use 6 inch length rod with SVO crank.
5. Flat top pistons only.
Zero deck, piston may not be above the block.
6. Any factory steel head, or DART/
World Products Sportsman II steel head. DART/World
Products head must have casting number of I037. Heads
must have a 60 cc minimum combustion chamber, no
grinding in chamber. No aluminum heads. No relocating
rocker arm studs. No porting or polishing. Matching
ports in the intake port of head only. Depth maximum for
matching ports is 3/4 of an inch. Lifter bore must
remain stock. The valve seat area can be cleaned up
using a maximum 80 degree grinding stone. No additional
hand or machine work permitted. CC measurement of intake
runner of head to remain stock with the exception
of matching port. Vortec
heads permitted with approved casting numbers of: Small
port #25534351 and Large port #25534371. RHS ProAction
cylinder heads permitted for Ford engines with approved
part numbers #35301, #35302, #35303.
7. Production valve or production
replacement, steel or stainless steel only. Any spring,
any retainer permitted. Roller rockers permitted. Stock
valve guide angle. No relocating valve guides.
8. Flat tappet cams only. No mushroom or roller
cams.
9. Block must be cast iron.
All factory identification numbers and/or part
numbers must remain on crank and heads. Main
bearing cap must be iron or steel.
General Engine Specifications
––
1.
Maximum of four barrels of carburetion. Single
carburetor only. No super chargers, fuel
injection or turbo chargers.
2. Any approved intake other
than a smoke ram or tunnel ram. Intake height to
be a maximum of 8 inches measured from the top
of the carburetor bowl using a straight edge
from the bowl to the #3 or #4 runner of the
intake manifold.
3. Balanced assemblies
optional.
4. Must have a working clutch
and starter. Multi-disc clutch permitted. Stock
configuration clutch must have a full scatter
shield of at least 1/4 inch thick steel or an
approved bell housing. Failure to do so will
result in an automatic suspension and loss of
points.
5. Fuel - Racing gas or
Methanol only. No additives of any kind
including top lube. Methanol according to
Federal Standards of Purity, Grade A or AA.
6. No electric fuel pumps or
pressurized fuel systems. No inboard (in
driver’s compartment) fuel pumps.
7. Gear drive units
permitted. No externally adjustable cam timing
device.
8. Any battery ignition. No
magneto.
9. No needle bearing cam,
crank or rod bearings permitted.
10. No titanium rods.
General Specifications ––
1. Exhaust and steering
system must pass safety inspection.
2. Battery to be safely
secured and covered to meet safety requirements.
3. Racing type bumpers
permitted, if bumper extends more than three
inches outside of frame rails, then ends must be
rounded and bumper must meet the approval of
technical committee. Skid rails must be tight to
the body except a kick out of skid rail
permitted 18 inches in front of rear tire but
may not extend past tread of any tire at any
time.
4. Competitors should wear
fire retardant driver’s uniforms and gloves
whenever driver is on the track.
5. Window nets on driver’s
side or arm restraints mandatory.
6. No driver adjustable
weight jacks.
7. The driveshaft is to be
painted white.
8. One way driver radios
mandatory.
THE ABOVE RULES ARE INTENDED
TO BE A GUIDELINE IN CONSTRUCTING A CAR. THE DECISION OF TRACK
OFFICIALS IS FINAL. CALL BEFORE YOU BUY OR BUILD.
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Tues. thru Thurs. 9AM - 4PM
Fri. 11AM to end of race*
Sat. 2PM to end of race*
*
= providing we race
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Williams Grove Speedway
1 Speedway Drive
Mechanicsburg, PA 17055
Phone: 717-697-5000
Fax: 717-795-7216
Email:
williamsgrove@verizon.net
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Located at
the old Williams Grove
Amusement Park
Vendor spaces only $10,
space size is 15' x 25'
For information call 717-766-7215
For vendor space outside,
call Troy at 717-385-9015
Inside vendor space,
call Mim at 717-243-7113
For directions
click here
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Williams Grove Speedway Video
Sold Here
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