Sunset
Speedway 2008 Late Model Rules
In co-operation with
Kawartha, Mosport,
Peterborough and Varney
Speedways
1) Body Style
A) Any north American built
car: fiberglass, aluminum or steel
B) No jeeps, station wagons
or convertibles. Pickups allowed on a car chassis at
Mosport.
2) Body Appearance
A) Body must be stock
appearing and in stock position on the frame. Bodies are
to be template style; 5
Star, ARP etc.. Body must be aftermarket and made of
steel, aluminum or
fiberglass. Rubber front and rear bumper covers are
recommended. No wedge
style, slab side or high performance bodies or DIRT
noses allowed.
B) When using a fiberglass
roof, min. 20 gauge sheet metal below the roof in
driver compartment area
recommended. No carbon fiber body parts permitted.
C) Wheel opening flares
cannot extend past scrub rails.Wheels or tires must not
extend outside body or
scrub rails.
D) Absolutely no bars shall
extend outside of body panels including the grille
and bumper with the
exception of side scrub rails. Side bars must extend no
further forward than the
rear of front wheel opening, and no further rearward
than front of the rear
wheel opening, maximum 1"x2" welded or bolted to roll
cage. No sharp edges. When
bolting on scrub rails, you must use carriage bolts
(or round-headed bolts), if
hex head bolts are used, they must be counter sunk.
E) Grille and headlights
must retain original appearance.
F) Minimum ground clearance
is 4"(four) inches at the lowest point of body or
skirt and 5"(five) at
the frame to the ground, excluding front cross member but
including ballast weight
(without driver).
G) Body height will be a
minimum of 46 inches, measured 10" behind top of
windshield on roof
centerline (without driver).
H) Crush panels, minimum of
40 thou. aluminum can be used to separate the
body panels and windshields
from the interior.
I) Rear spoiler 5"
maximum height, and maximum width of 62". Any lip on top
edge of spoiler is included
in the 5" maximum height. No bracing or side pods.
At the point in which the
spoiler bends and goes vertical, it cannot exceed
beyond the edge of the rear
deck and must follow the contour of the rear deck
lid. Maximum spoiler height
is 39" as measured from the ground to the top of
the
spoiler with a 46” roof height and 40” with a 47” minimum roof height.
J) Cars must be equipped
with a cable or chain, front and rear to pick the car up.
K) Doors must conform to
original shape and be securely mounted using bolts,
rivets, and or welding. No
sheet metal screws.
L) Hood must resemble stock
hood in appearance. Original manufactured hood
scoops only allowed.
Exterior hood hinges allowed and must have 3 front hood
pins. If hood is removable,
it must have 2 front with center hold down or have 3
front and 2 rear hood pins
.(No carbon fiber hoods or bodies panels allowed).
M) Trunk deck lid must be
hinged or easily removable to have easy access in
case of fire.
3. Battery:
Must
be anchored securely and separated from driver’s compartment by firewall.
One 12- volt battery only.
4. Bell Housing Clutch
and Flywheel:
Stock type steel single
disc clutch and flywheel units must not be drilled or
machined.
Stock type clutch and pressure plate, minimum 10“ diameter. Disc
may be puck type, no
aluminum. Nodular flywheels are allowed. Must have an
NHRA steel bell housing,
Sema 6.1 flywheel shield or scatter shield of 1/4"
steel. Must be mounted over
the clutch and flywheel 360o between
the bell
housing and the floor. No
scatter shield inside the car permitted. At your own
option, bell housing should
have an inspection plate for easy inspection of
clutch. If there is no
inspection plate on the bell housing, you may be required to
remove the transmission for
clutch inspection. Minimum flywheel weight of
14lbs. Mandatory ˝"
hole in bell housing for turning flywheel when whistling
your engine.
5. Brakes:
A) Four wheel hydraulic
brakes in good working condition are compulsory.
B) Four-wheel discs
allowed.
C) Dual master cylinder
with balance bar allowed.
D) No aluminum calipers or
alterations of calipers and rotors. Steel single
piston
calipers and minimum 3/4” rotors only. Steel caliper mounts only.
E) No brake fluid cooling
devices containing a pump.
6. Bumpers:
Must be original type,
securely fastened with all metal bracing and /or
reinforcing concealed
behind bumpers. Must not be wider than width of body.
Must be minimum of 15"
and maximum of 18"from ground measured from the
center of the bumper. No
cut-off ends.
7. Chassis and
Suspension:
A) Unless otherwise
specified all suspension parts are to be stock with no
modifying.
B) Body, engine and chassis
are interchangeable.
C) Absolutely no offset
chassis allowed. Perimeter chassis only.
D) Wheelbase will be a
minimum of 104" on full frame chassis. The frame rails
can be shortened to meet
this measurement. Wheelbase must be within 1 inch
from one side to the other
side (I.E. 104" minimum, 105"maximum) of the car at
all times. This is
tolerance for alignment
purposes only. Max. 66” track.
E) Fabricated rear clips
are allowed.
F) A factory production
stock front clip may be used from the firewall forward.
Fabricated front clips are
allowed but must meet the following specifications:
tubular front clip rule
2"x3" or 2"x4". Factory front clips must extend from in
front of the steering box
rear ward to the main rail. Frame may be built out of
2"x3" or
2"x4", minimum .095" wall thickness. Underslung rear section
must
run 25lbs of penalty weight
or 50lbs of ballast
mounted 8” over top of the rear
end center housing (50 lbs
from total weight and not 50lbs of penalty) On front
2”
x 3” clips you must run 40 pounds of ballast in front of the cross member.
On
2”
x 4” clips you must run 25 pounds of ballast in frontof
the cross member. On
both styles of clips the
weight must be split equally and mounted to each frame
rail. All ballast weight
must be painted white and marked with car # and must
use self-locking nuts or
drilled and wired on mounting bolts. The ballast must
also be easily removed for
weighing purposes.
Where the main frame rail
ends, forward may be built out of smaller material if
desired to accommodate
mounting of the front bumper. This will be referred to
as the bumper crush tube.
Lower control arms must
remain in stock position and will be checked on a
regular basis with a
portable measuring devise.
Stock steering box is
mandatory; no rack and pinion.
After market center link
may be used.
Aluminum tie rod sleeves
may be used.
Hiem joint tie rod ends may
be used.
Cross member vertical side
members must be a minimum size of 2"x3"
rectangular tubing and a
wall thickness of no less than .095".
Cross member bottom
horizontal piece must be minimum size no smaller than
1.5"x 3"
x.095" wall thickness.
G) Chassis rails must be of
equal distance from the centerline of car. Main frame
rails
must be no less than 24” outside of rail to center line of chassis.
H) Chassis from firewall
rearward may be fabricated from no less than 10"
circumference by .095"
box tubing. No holes drilled for lightening purposes.
I) Front coils, strut rods
and sway bars may be interchanged, provided they fit
original mounting and are
not altered from stock appearance and position. Sway
bar must be mounted to
lower control arm and may be adjustable. Struts may use
heim ends but must have the
strut to frame link mount to the rear (Ford).
J) Maximum 4 load bolts may
be used.
K) Hubs may be drilled for
larger wheel studs. Minimum of 5/8" wheel studs
mandatory.
L) No coil over suspensions
allowed. No coil over eliminators.
Minimum 4" O.D. coil
springs allowed. Spring rubbers may be used.
M) Cars must use stock type
cast, forged, or fabricated solid pin spindles. Steel
hubs only, no aluminum
hubs.
N) Steering arms may be
altered to fit steering linkage.
O) Any steel front upper
control arms may by used. Upper control arm shaft
must be stock type steel or
aluminum. Sliders are allowed. No heim ends.
P) Stock O.E.M. lower
control arms must remain in stock mounting position.
Left lower control arm can
be altered in length to assure positive camber.
Measurement from grease
nipple to mounting hole in frame must be within 1
inch of factory
specifications at all times. Lower control arms cannot be reversed
from side to side. Ball
joint can be realigned to eliminate binds.
Q) One shock per wheel.
Spec shock is Koni with part number:
307325, 307436, 309325 or
309436
*** Note: During the
transition period to this spec shock, Sunset will
temporarily
allow any of your last year’s shocks if Bayside Auto retails that
shock for $175 or less.
Sunset has the right to replace any shock on any car with
a new shock that has the
same part number as the shock they are replacing and
this will be done between
the second set of heats and the feature.
8. Drive Line: Steel
Drive Shafts Only
Must have steel 360-degree
retaining loops 1/4 by 2" positioned at the front and
rear of the drive shaft
within 6"of each u-joint. No chains. Drive shaft must be
painted white or
fluorescent. No accessories may be driven off or attached to
drive line.
9. Engine
A) V8 engines only. Sealed
crate part #88958602 permitted.
B) Maximum size is Chrysler
andAMC 360, Ford 351 and Chev. 350 cubic
inches. Maximum overbore of
.060".
C) Engine Location:
For a 104" to
107" wheelbase car engine must be located where the front most
spark plug must be centered
or ahead of the upper ball joint line with 0
tolerance. Wheelbase over
107" have 1" of tolerance.
D) Minimum engine height of
11" from center of crankshaft to ground level.
E) Camshaft- Hydraulic flat
tappet cam only allowed. Offset camshaft key
allowed. Must run stock
size lifter bore for engine being run, no sleeving.
Chryslers exempt. No belt-
drive systems permitted. No multiple gear drive
systems permitted.
F) Cylinder Heads:
1) Stock O.E.M. or World
Products cast iron straight plug only. No other
aftermarket cylinder heads
allowed.
2)World Products cylinder
head part #43600-1, #43610-1, casting# I-052 is
allowed for GM.
3) No porting, polishing or
port matching of cylinder head, intake or exhaust
manifolds; and no porting,
polishing or relieving under the valves. Stock Only.
4) No special lightened
valves. No titanium valves. No turning of valve stems. A
undercut valve may be used.
Ball method used to test valve stem to seat
clearance. Ball size is
.787 for intake and .531 for exhaust.
5) No GM angle plug heads.
6) No GM head with cast
number 292.
7) No Chevy bow tie heads.
GM Vortec heads only on sealed crate engines.
8) The maximum valve sizes
as measured across the valve are as follows:
General Motors : Intake - 1.94”
Exhaust - 1.60”
Ford Cleveland : Intake - 2.04”Exhaust
- 1.65”
FordWindsor : Intake - 1.94”
Exhaust - 1.64”
Chrysler Corp. : Intake - 1.88”
Exhaust -1.60”
9) Stock only diameter
valve springs.
10) Rockers must be stock
for engines. 1.5 to 1 ratio on GM engines.
11) Screw in stud and guide
plates allowed. No stud girdles or rev kits.
G) No dry sumps.
H) No aluminum blocks.
I) Engine must use factory
specs for bore and stroke. 6" rods allowed, no
aluminum or fluid dampers,
OEM steel elastomer - type balancers only.
Aluminum pulleys allowed.
Mosport and Peterborough are 5.7” rod and 48
pound minimum crank weight
on GM with no knife edging or bull nosing.
Minimum
damper size on a crate engine is 6 3/4”.
J) Pistons - Any flat top.
K) Intake Manifold - These
manifolds must remain as manufactured. No port
matching
or flow work permitted. Manifolds must not be painted. All part #’s are
current design Edelbrock
Performer series intake manifolds. 1st design
manifolds with the same
part # are not permitted. Approved: Chevy #2101,
Chrysler #2176, Ford
Cleveland #2750, FordWindsor #2181
Adaptor to be one pc. solid
with no modifications and with gasket not to exceed
a thickness of 1.25".
L) Exhaust:
1)
Use stock cast iron 2 ˝”maximum
outlet manifolds, Schoenfeld #135, 135H
or 145 headers or ALLSTAR
ALL34200 aftermarket cast iron manifolds. Built
engines must add 50 lbs
penalty weight if using headers.
2) Notching of cross member
allowed to accommodate exhaust manifold. Crossmember
must be properly plated so
it is not weakened.
3) No polishing or matching
of ports, must bolt to head without spacers and
remain in stock position.
No inverting of manifolds.
M) Exhaust:
1)
The maximum O.D. of the exhaust tubing is 2 1/2" up to muffler and 3”
after
muffler
with manifolds or 3” all the way for headers.
2) Pipes must be firmly
mounted and exit behind the driver. Pipes to be cut flush
to the body and above the
frame rail or turned down at the exhaust end and exit
under
car. If using mufflers with a 3” enter and exit a step up tube may be used
for
a max. of 6”. Magnaflow #11219 (3” inlet, outlet)
or Magnaflow #11216
(2.5”
inlet, outlet) recommended, mandatory at Mosport.
3) No collector pipes, 2
into 1 or collector boxes allowed. Cross over is allowed.
N) Fuel Pump: Mechanical
pump only.
O) Fuel: The gasoline shall
not be blended with alcohols, ethers, or other
oxygenates and it shall not
be blended with aniline or its derivatives, nitro
compounds or other nitrogen
containing compounds. No NOS system.
P. Carburetion: One
R4412-500 C.F.M. Holley factory stock produced twobarrel
carb. only. The only
changes allowed are jets; power valve and removal of
choke parts. Two throttle
return springs and stop are mandatory. Carb. hats
allowed. Air cleaners are
mandatory. An accelerator toe bar mandatory. Air
filters boxes are
permitted. No boost venturi below the throttle plate. No ram air
systems. A quick-change jet
kit (part #3425 float bowl) may be used. No Keith
Dorton performance
carburetors.
Holley factory stock
measurements are as follows:
Metering block must have the following
ID# stamped on it. Factory stock
#5924 or#5925. The #10570
will appear on replacement or service metering
blocks.
Metering block power valve channel
restriction ports (2 holes behind the
power valve) maxi.
.0635"
Metering block idle feed restriction
ports (2 holes) maximum: .035"
Metering block main passage to
discharge nozzle (2 holes) maximum: .141"
Main body high speed air bleeds (2
holes) maximum: .028"
Main body idle speed air bleeds (2
holes) maximum .074"
Butterfly (throttle plate) thickness:
.0398" - .0438"
Hole in butterfly:
.090"-.096"
Butterfly must have stamped on it
ID#215
Throttle shaft diameter
.368"-.369"
Throttle shaft thickness at flat of
shaft: .152"
Venturi bore diameter:
1.373"-1.377"
Boost venturi inner bore diameter
.377"-.383"
Boost venturi outer diameter
.610"-.630"
Throttle bore diameter
1.6855"-1.6865"
all air entering the engine for
combustion purposes must enter through the
air horn of the carb
Q) Distributor and
Ignition:
1) Battery operated
ignitions only.
2) Car must be
self-starting and have an ignition kill switch on left and right side
of dash. Kill switch must
be painted red within reach of driver on left hand side
of car.
3) Stock single-point
distributor and stock type coil allowed. No dual points.
4) OEM electronic ignition
may be used and require stock type coil and stock
type ignition modules. (No
Mallory or MSD type systems allowed.)
5) No traction control
devices allowed.
10. Starter:
Race cars must be self-
starting. NO push starting. Starter must be in stock
position and functional.
11. FireWalls:
A) Interior: all flammable
materials must be removed.
B) Front firewall does not
have to be original, but must be min. 22-gauge steel.
Passenger side of fire wall
may be moved as far back as the front of the roll
cage, to allow for easy
access to drive line, and may be .045" aluminum.
C) A metal firewall of
22-gauge steel must be securely fitted over the rear seat
back brace. The top shelf
behind the driver’s
seat to completely close off the
trunk compartment and may
be constructed of .045" aluminum.
D) All sheet metal work
must be neat and properly fitted. All holes are to be
covered with sheet metal
either welded or riveted.
E) Floor must be complete
and have all holes covered with sheet metal. Step up
over transmission /
driveshaft tunnel to the right roll cage uprights can be
maximum
height 10" from driver’s floor and of minimum 22-gauge
steel.
F) The rear deck panel,
dash, and above the drivers shoulders may be .045 thou
aluminum.
12. Fire Control:
A) Cars must have a 2 1/2
lbs minimum fire extinguisher with a steel or
aluminum head mounted in a
steel mounting bracket and be bolted down, and
within
driver’s reach with seatbelts
fastened. Fire extinguisher must be serviced
and inspected each year and
dated no later than January 1st of the current year.
B)
Driver’s fire suit is mandatory. No coveralls. Driver and suit must maintain
clean looking appearance.
Racing gloves, contoured neck collar, balaclava,
underwear, socks, shoes and
Hans or Hutchins type devices are highly
recommended. No nylon shoes
allowed.
13. Fuel Cell:
A) Fuel Cell Mandatory.
B) Fuel cell must be
mounted between the frame rails (no notching of the rails
allowed)
and the bottom must be mounted with no less than 9“ ground clearance.
Fuel cell must be secured
with steel straps made of 1" x 1/8" or equivalent, not
less than two lengthwise
and two crosswise, full 360 degrees.
C) Fuel cell must have left
side, right side and rear hoop protection bars,
minimum 1 3/4" x
.095" tubing.
D) Fuel cell must have a
one way check valve in the vent line and have a shutoff
valve installed which is
accessible to driver and safety crew. Must be clearly
marked OFF, ON.
E) Gas cap must have an
appropriate attaching line to prevent its loss. Ground
strap from tank to chassis
is mandatory.
F) Steel fuel lines must be
used and neoprene can be used for connection
purposes only. Must be
securely fastened under floor. No copper lines. Metal
fuel filters only. Oil line
to gauge must be braided, copper or steel line.
14. No plastic lines.
15. Instruments:
Oil pressure and heat
gauges mandatory.
16. Paint and Lettering:
All cars must be neatly
painted. Numbers assigned by the track must be painted
on both sides of the car
and roof, in minimum 24" high by 3" wide letters (roof
numbers read from right
side) of a color offering a distinct contrast to the color
of the car. No trick
numbers. 4" numbers on both headlight and tail light caps
required. Block type
numbers 6" high, white in color, must be displayed on the
upper right hand side of
the windshield.
17. Radiators:
Must be in stock location
and include a 1-gallon metal overflow can securely
mounted ahead of engine
firewall, and under hood. No antifreeze. No remote
rads.
18. Rear End and
Suspension:
Any three or four point
hook up may be used. Lower arms must not exceed 30"
from mounting holes on rear
end to mounting holes on frame. Upper arms must
not exceed 30". Rubber
biscuits allowed at one end of trailing arms. Panhard bar
must be a one-piece solid.
Heim joints allowed.
A) Rear ends to be welded,
mini spool or full spool only. No aluminum or
titanium parts excluding
the spool.
B) Rear ends are
interchangeable (ie: Ford to Chev)
C) Floaters with steel or
aluminum hubs recommended.
D) Rear ends must remain in
stock position and centered.
E) No ratchet rear ends. No
traction assist or control devices allowed.
F) No cambered rear ends
allowed.
G) Final gear ratio cannot
be greater than 5:50 to 1:00 at Mosport or Kawartha.
19. Roll Bars:
A) Cage must be constructed
of 1 3/4 inch round steel minimum out side
diameter by .095" wall
thickness.
B) Four point cage
compulsory.
C) Base of uprights must be
electric or mig welded to frame of car.
D) Cage must be braced to
the rear frame kick-ups and diagonally between the
rear uprights.
E) A transfer bar between
the rear diagonal and the front frame optional.
F) A minimum of four
horizontal bars must be inside the left side door and three
bars inside the right door
and a minimum of two vertical bars between each
horizontal bar. Minimum 40”
length by 14" high, 16 gauge metal between door
bars
and body skin on driver’s side is mandatory on all cars.
G) A center overhead bar
running fore and aft between transverse members is
compulsory.
H) No pipe fittings
allowed.
I) All roll bars
in the driver’s area must be properly padded and taped with foam
rubber.
J) Left leg protection bar
must be installed between roll cage and left front rail.
All welds will be subject
to the approval of the tech inspectors.
20. Safety Belts and
Harness:
A quick release lap belt of
no less than 3-inch width and 3-inch shoulder harness
is mandatory. Belts must be
securely fastened to frame and/or roll cage with
minimum 1/2" inch
grade 5 bolts. Crotch belt mandatory. Seat belts must be
dated within the last 3
years or be in excellent condition. No one piece steering
columns. 2 U-joint minimum.
Padded steering wheel hubs mandatory.
21. Safety Helmet:
A Snell 2000 SA or newer approved
racing safety helmet and complete driver’s
fire suit must be worn in
all practice and race events. Goggles and full face
helmet highly recommended.
22. Seat:
An aluminum racing seat
must be used, bolted to roll cage, not bolted to the
floor. When mounting seat
use minimum 3/8" bolts with large washers to hold
racing seat, to seat
framework. Minimum of two bolts on the seat back and two
bolts on the seat bottom.
Seat must be positioned completely to the left of the
centerline of the car. An
approved head restraint must be made of some energy
adsorbing material.
Headrest side plates recommended.
23. Tires:
All entries are required to
use a brand of tire as approved by track management.
24. Transmissions:
A) Any manual stock OEM
transmission that bolts up to stock engine without
alteration. No special
engine transmission adapter plates permitted. All gears
must be operational.
B) Automatic transmissions,
must remain stock as produced, cooler is highly
recommended. Torque
converter must be stock and be a minimum of 10"
diameter.
25.Weight:
Car weights are 55% maximum
left side and 50% maximum rear. All ballast
weight must be mounted
safely and securely, no lower than 5" ground clearance.
All weight must be labelled
with car number and painted white. Added weight
must be in block form in no
less than five-pound blocks. Cars will be weighed
and teched after racing as
they come off the racetrack with driver in car and
without topping up fuel.
Minimum weight at Mosport, Peterborough and
Kawartha is 3,000 lbs. for
a sealed crate engine, 3050 lbs with a maximum
compression ratio of 9.5 to
1, 3100 lbs with a compression ratio of 9.6 to 1 to
10.0 to 1 and 3150 lbs for
a Ford with headers. Minimum weight at Sunset is
3,000 lbs. for a sealed
crate or an engine with a maximum compression ratio of
9.5 to 1, 3050 lbs with a
compression ratio of 9.6 to 1 to 10.0 to 1 and 3150 lbs
for a Ford with headers.
26. Racing rim only:
Maximum width 8 inches. No
aluminum, magnesium or wide 5 bolt pattern
wheels. No wheel spacers
allowed. Minimum weight 17lbs.
27.Windshield ,Window
Net:
A)Windshields must be
safety glass with 4 safety clips or lexan. No plexiglass
allowed
B)Window net mandatory with
minimum 3/8 inch rod. Must have quick release
latch.
C)Window pillars must be
approx. stock width and location.
D) Front windshield center
bracing mandatory. No exterior bracing, front or
back. Minimum two, and must
be on the inside of the car.
E) No added film spray
tinting permitted. Minimum side window openings 22"
length
x 14 ˝” height.
F)
No obstruction of driver’s view, in or out of race car, with the exception
of the
top 4"of the front
windshield for track sponsor decal. No letters or numbers
on the rear window.
28. Mirrors: One
rear view permitted.
29. Radios: Only
one way track broadcasted radios allowed.
Wes Good
(Track 705-436-2445)