2017 SUNOCO Modified Rules
COVERED BY THE FOLLOWING RULES MUST BE
CHECKED WITH CHEMUNG SPEEDROME OFFICIALS
BEFORE PROCEEDING. CHEMUNG SPEEDROME
RESERVES THE RIGHT TO ADJUST ANY RULE FOR
BETTER COMPETITION. ALL DECISIONS ARE FINAL
All cars minimum weight 2600 pounds with
driver. Dry sump oil systems are not
permitted. Chemung Speedrome Sunoco Modified
cars with a compression ratio of less then
9.6 to 1 will be given a weight break of
50lbs for a total weight of 2550. Maximum
56% left side weight. Car with driver. NO
allowances for gas, water, oil. NO
deduction for loss in weight due to race
wears. Dislodged weight CAN NOT be
returned to car for weighing after race.
Absolutely NO weight shift devices of
TRACK SCALE: Unless otherwise
authorized by Chemung Speedrome, at all
times during an event, all weights will be
calculated on official Chemung Speedrome
track scales. It is the responsibility of
each race team to see that their car meets
the specified minimum weight requirements
for this division on these scales.
CHEMUNG SPEEDROME SCALES WILL BE FINAL!
BALLAST WEIGHT: Added weight must be
in block form of no less than five (5) pound
blocks. If ballast weight is needed to make
total weight, it must be securely fastened
to the frame rails, be painted white and car
number painted on weight in a dark color.
Material and mounting must be acceptable
Chemung Speedrome. NO steel or lead
pellets. NO weight is to be mounted
in driver's compartment.
All bodies must be reasonably neat and stock
appearing, must be painted and neatly
lettered. Numbers from 00 to 99 two digits
only, no letters. Number must be registered
with Chemung Speedrome. NO decals
allowed on spoiler.
The rear of the roof, at the highest point,
shall be no more than three (3) inches
higher than the actual front measurement. A
maximum height of 35 inches is allowed on
the tail light panel measured from the
ground to the spoiler mounting point.
Minimum body height is 40 inches. Body
height shall be determined by measuring.
NO MIRRORS or reflecting devices are
allowed that would enable the driver to see
the car behind/around them.
3. FRAME / SUSPENSION
All construction must be safe, professional
and acceptable to Chemung Speedrome.
MINIMUM of 2 inch Frame ground clearance
will be measured at frame rail between front
and rear wheels. Checked with driver in car.
4. ROLL CAGE
Must be constructed of seamless round
steel tubing with a minimum of 1 1/2 inch
outside diameter .095” wall thickness. There
are several allowable variations to the
basic roll cage design that are subject to
the discretion of Chemung Speedrome. Chemung
Speedrome decision on roll cage design and
safety is final. The mandatory six point
cage must surround the driver.
5. CHASSIS RULES
Open to steel bodied automobiles provided
they comply with, and adhere to,
specifications as outlined for this
A. COMPETING MODELS
Chemung Speedrome Sunoco Weekly Modified
Series races are open to eligible 1980
through current year models of American made
steel bodied passenger car production
sedans. Unless otherwise authorized by
Chemung Speedrome, all combination Events
shall be governed by the 2010 Chemung
APPROVED COMPETITION MODELS
CHEVROLET Cavalier, Monte Carlo,
Beretta, Corvette, Camaro
CHRYSLER Eagle, Talon
DODGE Avenger, Stealth, Daytona,
FORD Escort, Mustang , Probe
PLYMOUTH Laser, Sundance
PONTIAC Sunbird, J 2000, Grand Prix
OTHER APPROVED MODELS
Other models may be selected when
available providing they are the same in
body configuration and meet the spirit and
intent of competitive racing as currently
evidenced in Chemung Speedrome Sunoco Weekly
GENERAL CAR BODY REQUIREMENTS (CAR
ROC Modified body rules with the following
THE CAR BODY MUST MEET THE FOLLOWING
Cars must be neat appearing. Aluminum may be
used on the body, Steel must be used for the
interior All bodies must be installed on
frame in a manner acceptable to Chemung
Speedrome. Window openings must remain stock
appearing and must maintain the original
manufacturers window opening configuration.
Cars will not be allowed to compete with
altered window openings. Bodies must be no
wider than the standard width from the front
of the door panel to the rear of the quarter
panels when measured beneath the car at the
rocker panels. A minimum distance of 43
inches and a maximum distance of 45 inches
is permitted across the body at the bottom
of the front windshield opening. Bodies must
not extend below the frame at the side
rails. Skirts or additional metal may NOT
extend below the body. The floor area
directly beneath the seat forward to the
front engine firewall must be made using a
minimum 1/8 inch steel. The remainder of the
floor area to the right and rear of the seat
must be made from minimum 22 gauge steel.
All floor area panels must be welded
together. Streaming at the top of the
windshield will NOT be permitted.
Bodies must have standard appearing
windshield opening and the windshield post
must follow standard configuration. Cars
will NOT be permitted to compete with
excessive body damage. (Excessive body
damage to be determined by Chemung
Speedrome) Belly pans will NOT be
permitted. A belly pan will be defined as
any object or material that alters the flow
of air under the car. Determination of
whether any material or object is or is not
a belly pan shall be in the discretion of
Chemung Speedrome. Bottom panel of the front
nose panel may NOT extend rearward
past the edge of the harmonic balancer. The
driver's compartment may be enclosed with
additional sheet metal. All interior sheet
metal must be minimum 22 gauge steel.
Interior sheet metal CANNOT be higher
than or enclose a standard window opening.
Sheet metal in driver's compartment must be
horizontal from the top of the drive shaft
tunnel to the right side door bars or angle
from top of drive shaft tunnel upwards to
top of right side door bars. Angled or
horizontal metal must extend from the rear
firewall or back of seat a minimum of 26
inches forward. The interior sheet metal
behind the rear hoop may be roll formed
upward to the top of the rear hoop cross
bar. The sheet metal must extend rearward
and at the center of the rear axle housing,
the sheet metal may angle upward and seal to
the bottom of the rear window opening.
Interior spoilers, wings, or wind deflectors
will NOT be permitted. Double panels
will NOT be permitted. All interior sheet
metal subject to Chemung Speedrome approval.
DETAILED CAR BODY REQUIREMENTS:
FRONT AIR DAM An approved air dam may be
mounted to the front underside of cars. The
optional metal or vinyl front air dam must
be mounted perpendicular to the ground and
no more than three (3) inches behind the
front edge of the nose panel. Front nose
panel and air dam must not extend past the
rear edge of the front bumper and must
maintain two (2) inches ground clearance.
Nose panel and air dam must not extend past
outside edge of front frame rails. Air dams
must have a minimum ground clearance of two
(2) inches. All support brackets must be
mounted to rear of air dam. Horizontal or
flat air deflectors must not extend past the
outer edges of the front nose panel side
REAR SPOILER All rear spoilers and
spoiler mounting points must be approved by
Chemung Speedrome. A solid rear spoiler of a
minimum 1/4 inch thickness clear
polycarbonate only may be installed at the
rear deck lid and meet the requirements that
follow. An approved spoiler which controls
the flow of air over one surface only. The
maximum spoiler size permitted shall be
eight (8) inches high by 48 inches wide. The
rear spoiler must not be wider than the
standard width of the rear quarter panels,
measured across the top. The rear spoiler
must be installed to the rear of the quarter
panels where the rear panel meets the
interior sheet metal. During race events the
rear spoiler must not extend past the rear
edge of rear bumper. Decals or logos will
NOT be allowed on the rear spoiler.
Maximum of two (2) one (1) inch wide
adjustable supports are permitted on the
front of the spoiler. A maximum of three(3)
supports may be attached to the rear of the
spoiler. The supports, front or rear, may be
attached to the spoiler using a piece of one
(1) by one (1) inch aluminum angle one (1)
inch long. A maximum of 35 inches measured
from the ground to the spoiler mounting
point is permitted.
HOODS / ROOF All cars must be
equipped with a hood manufactured from metal
or fiberglass. The hood must be manufactured
so that it will completely cover the engine
compartment, from the left side to the right
side; turn down a minimum of four (4) inches
on each side, and cover (if used) the engine
side panels. NO part of the hood at
the side panels except for the "A" post,
shock and master cylinder covers may be
higher than the lowest part of the hood.
Only openings for the air cleaner and the
distributor will be permitted. NO
portion of the hood may be higher than the
bottom of the air cleaner. Hoods must be
with positive pin fasteners evenly spaced
across the front. All hoods must be approved
by Chemung Speedrome officials. Roof must be
stock for make and model of body used. Roof
may be steel or approved fiberglass. An approved
manufactured fiberglass roof panel may be
used. All cars utilizing an approved
fiberglass roof must install the (minimum)
1/8” thick aluminum anti-intrusion plate in
the roll cage halo as described in the
For additional specifications on letters A.
B. D. E. and F. see the NWMT rulebook.
No Aluminum roofs.
Roof support posts must
maintain the same angles as a stock
production car. The front post ("A" post)
must be mounted to the top front of the door
panel. The rear post must be anchored to the
rear quarter panels. All roof panels must be
installed in a manner that is acceptable to
Chemung Speedrome. The front of the roof
must be secured in three (3) places: one (1)
in the center and one (1) on each side. The
rear roof quarter window panel including the
door "B" post must be Chemung Speedrome
approved. The front edge of the "B" post
must be located a maximum of 24 inches from
the center of the rear axle housing forward.
Rear deck lid and interior panels
recommended to be of magnetic steel.
BUMPERS / SIDE RAILS The bumpers and
side rails must be rear of the car will be
57 inches and the maximum width permitted
will be 66 inches. Each end of the rear
bumper (from the mounting side) must be cut
on an angle and capped with a minimum of
0.125 inch aluminum. Chemung Speedrome
officials must approve alterations from this
design. All bumper caps must be welded and
sharp edges must be filed. The minimum size
permitted will be 2 3/4 inches by four (4)
inches by 3/16 inch thick. Bumper must be
mounted at axle height. A maximum distance
of 46 inches measured at the center of the
rear edge of the bumper is permitted. Weight
reducing holes will NOT be permitted
in the bumper. Any inappropriate bumper will
be disallowed. Front and rear bumper must be
securely attached in order to COMPETE.
All cars must be equipped with rear comer
rails and side rails. All rails must be
constructed using a minimum 0.083 inch thick
magnetic steel seamless tubing with an
outside diameter of a minimum 1 1/4 inches
and a maximum of 1 3/4 inches. Side rail
bars should be constructed using the
Right side bars shall be constructed by
using two (2) pieces of magnetic steel
seamless tubing. The bottom bar shall attach
to the rear of the frame rail and extend
upward and outward even with the outside of
the tires, or up to a maximum of 1/2 inch
outside of the tires. The bottom side bar
shall extend forward parallel with the frame
rail and angle in to the front sub frame
rail with minimal tire clearance. The bottom
bar shall be mounted centerline with the
rear axle and front spindle. The top side
bar shall be attached centerline with the
rear hoop cross bar extending outward and
forward to the forward most point of the
bottom bar. The top bar shall turn down, be
centered on and attach to the bottom bar.
The top bar shall have an additional support
bar attached to the front roll cage leg bar
centered on the dash cross bar. An
additional support bar must be added in the
The bar must be attached to the frame rail
and side bar. Two (2) additional vertical
support bars should be added, one (1) at the
rear and one (1) in the center of the side
rail bar. The distance measured at the
front, center to center, of the top and
bottom bars at the turn down area shall be a
minimum of six (6) inches. The distance
measured at the rear center to center shall
be a maximum of nine (9) inches and minimum
six (6) inches. Cars will not be permitted
in competition without side rails.
Left side rail bars shall be constructed
using the same guidelines described above
EXCEPT that the rear support bar may be
a radiused bar that attaches to the rear
hoop bar centered on the cross bar and
extending down and attached to the frame
rail. Left side rail bars must be mounted by
centering the two parallel side rail bars
with the center of the rear axle and the
front spindle or left side bars may be
raised a maximum of two (2) inches from
center. Cars will NOT be permitted in
competition without side rails.
Rear corner rails must be constructed using
two (2) pieces of magnetic steel seamless
tubing a minimum of 1 1/4 inches and a
maximum of 1 3/4 inches in diameter. Both
pieces of tubing shall be identically formed
and welded to a steel bumper bracket at the
rear. The tubing shall angle out and upward
even with the outside of the tires, or up to
a maximum of 1/2 inch outside of the tires
and maintain a six (6) inch dimension
measured center to center. The corner
bumpers shall then turn in with a minimal
tire clearance to the rear quarter panels.
Additional support bars must be installed
behind the body panels to the rear frame
rails and/or roll cage. Cars will not be
permitted in competition without rear comer
All frames must meet the requirements
described in the following paragraphs.
Aluminum or light alloy frames will NOT be
A. FRAME REQUIREMENTS
1. All frames are subject to Chemung
Speedrome approval. A minimum ground
clearance of two (2) inches must be
maintained on any part of the frame. All
frame components must be made of steel and
welded. Holes drilled in frames, frame
supports, and cross members with the intent
of making the metal lighter are not
2. Side frame rails and rear kick up
must be constructed with .090” minimum
thickness meeting the ASTMA 500
specifications, and be a minimum of two (2)
inches wide and three (3) inches high
magnetic steel box tubing.
The distance from the centerline of the
driveline to the left side frame rail,
measured anywhere along the frame, must be
within six (6) inches (eight (8) inches on
1989 and newer models with the frame rail
and roll cage extension) of the distance
from the centerline of the centerline of the
drive train to the right frame rail. A
minimum width of 34 inches and a maximum 46
inches, measured from center of left frame
rail to center of right frame rail, must be
maintained in the drivers compartment. A
minimum width of 31 inches and a maximum of
46 inches, measured from center of left
frame rail to center of right frame rail,
must be maintained on the rear kick up, with
exception for suspension and tire clearance.
All rear kick ups must maintain a minimum of
18 degrees from side frame rails to top of
3. The fuel cell reinforcement bar,
using a minimum 1 1/2 inches seamless (3)
vertical supports of 1 3/4 inches by 0.083
inch minimum seamless round magnetic steel
tubing connecting it to the rear frame cross
member. The main roll cage bar and the front
roll bar legs must be connected with four
(4) horizontal door bars on both left and
right sides. The top door bar on each side
must have a vertical vent window bar welded
upward and connecting to the front roll bar
legs. An optional vertical bar may extend
from the roof hoop bar radiused outward and
turn down to the top horizontal door bar on
driver’s side. The minimum 1 1/2 inch steel
seamless tubing should be located in line
with the driver. The door bars must be
convex in shape and spaced from top to
bottom as equal as space permits. The door
bars must be the same length and have an
equal amount of convex in both the right and
left sides. The door must have six (6)
vertical studs per side of 1 3/4 inches by
0.083 minimum seamless round magnetic steel
tubing equally spaced. Two (2) angular studs
must be attached from next to the bottom
door bar to the frame rail. 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. A roof support bar must
also extend from the right front corner of
the roof bar down to the transmission cross
member. All joints where bars meet the main
frame and meet the door bars, the roof bar
and the rear support bars, MUST have gusset
plates for reinforcement. Magnetic steel
tubing, must be installed behind the fuel
cell. This reinforcement bar must be as wide
as the fuel cell and as low to the ground as
the fuel cell with a minimum of two (2)
uprights from the reinforcement bar to the
rear frame cross member, evenly spaced
behind the fuel cell. An X cross member made
of one (1) inch magnetic steel tubing must
be installed beneath the fuel cell from
corner to corner. The X cross member must be
welded or bolted to the rear frame rails in
a secure manner. Two (2) additional support
bars, one (1) at each corner of the
protective bar, must extend forward and be
welded to the rear frame assembly.
4. The front sub frame assembly must
be constructed using a minimum 0.083 inch
thickness meeting the ASTMA 500
specifications, two (2) inches wide and
three (3) inches in height steel tubing. A
minimum of 27 inches, and a maximum of 32
inches, measured from center of left frame
rail to center of right frame rail, must be
maintained from the mounting point of upper
control arms forward. All front sub frame
assemblies must maintain a minimum of 30
degrees angle from side frame rails up to
the top of the sub frame. All sub frame
assembly support bracing shall be a minimum
0.090 inch by 1 3/4 inches round magnetic
steel seamless tubing. Frame support bars,
left and right, must extend from the roll
cage to the sub frame and must have a
downward radius bent into the bars before
they are welded to the sub frame. The left
and right support bars must not have any
additional braces added between the front
leg bars and where they attach to the front
sub frame assembly. A flex support tube may
be added to the front support bar at the
radius and extend forward and be attached to
a cross member. Any frame rejected by
Chemung Speedrome for showing poor
workmanship will not be approved until
necessary corrections have been made.
The minimum wheelbase permitted in the
Chemung Speedrome Sunoco Weekly Modified
class competition is 107 inches. When
measuring the wheelbase, the minimum
allowable tolerance CANNOT exceed one
(1) inch plus or minus on the other side.
7. ROLL BARS
Round magnetic steel tubing 1 3/4 inches by
0.090 inch seamless rollover bars are
compulsory for the basic roll cage and must
be Chemung Speedrome approved. Aluminum
and/or other soft metals are NOT
permitted. Roll bar connections MUST
be welded. MUST be four post minimum
fastened to top of frame. MUST have X
or diagonal brace in case behind driver.
Seat to be fastened to top of cage and
frame. Nerf bars must conform to the same as
asphalt modified. Bumpers and nerf bars must
be built on 14 inch centerlines. Center of
front and rear bumper must be at the center
of tire height 14 inches. Bumper must be
smooth and capped. MUST have drivers
side window net. Fire resistant padding
MANDATORY on all bars located near
driver. May use one piece pad on drivers
door bars. MUST have vertical bar in
middle of front opening of windshield
(minimum 1 inch O.D.)
8. FAN SHROUD AND DUCTS
When ducting air from the nose housing to
the radiator, air directional shields are
permitted within the duct.
Car must have self working starter and must
work at the beginning of the race.
1a. IGNITION SHUT OFF SWITCH: All open
wheel cars must have the (tigor) ignition
cut off switch, it will be checked and it
must be operable.
Tigor switch available through Oval Speed
1b. SEAT AND SHOULDER HARNESS
All seats must be aluminum and have head
rests or high back seat. Seat must be
attached to roll cage and frame. Back of
seat must be mounted to the roll cage. NO
fiberglass or plastic seats. Driver must use
a minimum three inch quick release, 5 point
restraint systems. A two inch wide crotch
strap is mandatory. All safety belts must be
no more than three years old, and have
readable identification tag. Any belts older
then three years will not be allowed. NO
original equipment belts permitted. Shoulder
harness must be connected to the roll cage.
All lap belts must be mounted behind the
seat and attached to the roll cage according
to manufacturer specifications. All roll
bars and driver side bars or other
protrusions that driver may come in contact
with must be properly padded with approved
race car roll bar padding. All cars must
have a working fire extinguisher in easy
reach of the driver. On board central fire
extinguishing systems are highly
recommended. Driver side net with quick
release mechanism is MANDATORY. No
plastic parts permitted. Boldly labeled fuel
and electrical safety switches are to be in
reach of Driver and safety crews.
HANS OR HUTCHINS
HEAD AND NECK RESTRAINTS ARE MANDATORY!!
2. FIRE SUIT/ HELMET
All drivers must wear a clean one piece SFI
3.2 drivers suit quilted and or with Nomex.
Underwear, head socks, gloves, foot socks
and shoes must meet SFI specifications.
3. GLASS WINDSHIELD
A single one (1) piece flat or radiused type
polycarbonate/ lexan windshield may be used
on the drivers side. The windshield must be
mounted flush with the cowl or dash panel
and extend up to the top of the windshield
opening in front of the driver. Regardless
of the type of windshield being used, it
cannot be wider than the center of the
windshield opening. A complete steel
windshield screen (with maximum openings of
one (1) inch by two (2) inches must be
installed in the right side of the
windshield opening. The windshield screen
must cover the right side windshield opening
from the center windshield bar to the right
side roll bar and from the front hoop bar,
at the top, down to the cowl or dash panel.
Decals will NOT be permitted on the
windshield. All windshields, windshield
screens and their installation must be
acceptable to Chemung Speedrome. Driver
window must have window net.
4. FIRE WALL
A front and rear firewall of a not less than
22 gauge magnetic steel must separate driver
from the engine compartment and fuel cell.
The front firewall must be positioned below
the leading edge of the windshield. The fire
walls must be sealed and welded in place.
All suspensions and related parts must be
reinforced and meet the following
Coil over front springs. One spring per
wheel. STEEL ONLY.
1. Coil over must mount to lower
2. Strut bars will NOT be permitted
for mounting of coil over.
3. Coil over springs must steel and
will be constructed with both coil ends
closed and ground.
COIL OVER REAR SPRINGS
Coil over springs must steel and will be
constructed with both coil ends closed and
6. SWAY BARS
Only magnetic steel front sway bars are
permitted. Rear sway bars (anti roll bars)
will NOT be permitted.
7. SHOCK ABSORBERS
The use of shock absorbers must meet the
following requirements: Coil over shock
absorbers may be used. Shock absorbers and
coil over shock and spring, by visual
reference, must remain within the outline of
the body and NO holes can be cut in
the outer body for the mounting of shocks.
SHOCKS Only one (1) shock per wheel.
All shocks subject to Chemung Speedrome
approval. NO shock with a published racers
net price greater than $300.00 U.S. currency
will be permitted. Any shock to be approved
must be available to all competitors.
The only shock absorbers and internal
components permitted will be those shock
absorbers submitted by the manufacturers and
approved by Chemung Speedrome officials. A
maximum of one (1) shock absorber per wheel
is permitted. External shock absorber
reservoirs will NOT be permitted.
8. A FRAMES
The upper A frames and lower control arms
must meet the following requirements: Upper
A frames and lower control arms must be
acceptable to Chemung Speedrome. When
attaching upper control arms to the mounting
plate, only standard type castor/camber
shims or washers will be permitted.
9. SPINDLES, WHEEL BEARINGS AND HUBS
The spindles, wheel bearings and hubs must
be acceptable to Chemung Speedrome and meet
the following requirements: Heavy duty
magnetic steel spindles and wheel bearings
are compulsory. Aluminum or magnetic steel
hubs are permitted. The front spindles must
be attached to the frame using wheel tethers
and be secured in a manner acceptable to
Chemung Speedrome officials. Spindles and
hubs must be approved by Chemung Speedrome.
10. BODY HEIGHT REQUIREMENTS
Body height shall be determined by measuring
(with driver) the overall height of the car
from a distance of six (6) inches behind the
top of the windshield on the roof
centerline. Minimum height will be 40
inches. The rear of the roof at the highest
point shall be NO more than three (3)
inches higher than the actual front
11. GROUND CLEARANCE REQUIREMENTS
Frame rail and sheet metal clearance will be
two (2) inches. All ground clearance
requirements will be measured with the
driver in the car. NO sheet metal
below the frame rails!!
12. WEIGHT SHIFTING DEVICES
Mechanical devices for shifting weight which
can be activated by the driver will NOT
be permitted inside of drivers compartment.
Electrical, pneumatic, hydraulic or remote
control devices which change the handling
characteristics or height of the car are
13. STEERING COMPONENTS
The car steering components must meet the
following requirements: Rack and pinion
steering ALLOWED. All cars will be equipped
with a magnetic steel steering shaft. Tie
rods, drag links and component parts must be
heavy duty. Interchangeable pitman arms may
be used. Pitman arms may NOT be drilled for
weight reduction. Center top of steering
post must be padded with at least two (2)
inches of resilient material. A quick
release magnetic steel or aluminum coupling
on steering wheel is MANDATORY. The
coupler CANNOT be covered with
plastic. The use of universal joints in
steering shaft must be approved by Chemung
Speedrome. Only metal or aluminum steering
wheels are permitted. NO Plastic. The
power steering pump must be mounted and
driven off the front of the engine.
14. BRAKES & BRAKE COMPONENTS
The car brake components must meet the
following requirements: Four (4) wheel disc
brakes MANDATORY. Only magnetic cast iron or
cast steel rotors will be permitted. Brakes
must be operational on all four (4) wheels
at all times. Master cylinders and
reservoirs should be mounted on the engine
side of the front firewall. Inboard brakes
are NOT allowed. Electric wheel speed
sensors or brake actuators will NOT
be permitted. Power assisted braking systems
will NOT be permitted. Only one (1)
brake caliper per wheel using only two (2)
brake pads per caliper will be permitted.
Only a single brake bias system which
connects to the balance bar of the brake
pedal assembly will be permitted. Inline
brake proportioning systems will NOT
The brake cooling system must be acceptable
to Chemung Speedrome and meet the following
requirements: One (1) air duct per wheel may
be used for brake cooling. All scoops must
be acceptable to Chemung Speedrome
officials. Maximum dimension of front brake
air scoops is three (3) inches by eight (8)
inches when mounted to the front sub frame
or front bumper. If the brake scoops are not
operational, they must be blocked off.
Screens and air ducts, from the opening to
the brakes, must be acceptable to Chemung
Speedrome officials. Brake fluid
recirculating devices will NOT be permitted.
Only one 12 volt battery. Battery must
be located between the frame rails. Battery
must be securely anchored and mounted inside
a spill proof container located under hood
or floor of the car. If located under the
floor, the battery must be completely
encased. If located under the hood, the
battery must have suitable cover. NO
battery may be forward of the radiator or
rear of the rear end housing of the car.
Battery location must be acceptable to
Chemung Speedrome officials.
16. ELECTRICAL SWITCH LOCATION
All electrical switches must be located on
the dash panel or within easy reach of the
driver. A labeled on/off master switch to
the battery cable MUST be installed on the
cowl behind the windshield opening on the
right side of the driver. The switch must be
easily accessible and in plain view.
17. ENGINE COOLING SYSTEM
Engine cooling system must be acceptable to
Chemung Speedrome. Icing, Freon type
chemicals or refrigerants may NOT be
used in or near the engine compartment.
Portable cooling machines or devices will
NOT be permitted.
The transmission must meet the following
requirements: Only standard production OEM
type Muncie or T 10 manual three (3) or four
(4) speed transmissions are permitted. May
remove first gear and replace with spacer.
Automatic transmissions allowed. Only
aluminum, or steel transmission housings are
permitted. Only OEM type gears are
permitted. All transmissions must have a
constant engagement of the input shaft with
gear and countershaft with cluster and
reverse gears. Chemung Speedrome reserves
the right to have all cars use a final drive
gear ratio within the limits set by Chemung
Speedrome. Any method or transmission gear
higher than 1.18 to 1 will NOT be
permitted. The only high gear transmission
ratio allowed will be 1 to 1. A forward gear
and reverse gear MUST be in working
order. ONLY manual shift linkage is
permitted on the transmission. ONLY
fire resistant type shifter boots are
permitted. The Jerico transmission will
NOT be permitted. No automatic
The engine cooling radiator must meet the
following requirements: Radiator must remain
in front of the engine. Radiator dust
screens PERMITTED. Radiator MUST
be copper, brass or aluminum. Radiator
installation must be acceptable to Chemung
Speedrome. Radiator overflow pipe MAY
be relocated and a minimum one (1) gallon
overflow can. NO anti freeze.
The clutch and clutch assembly must meet the
following requirements: Must be disc /
pressure plate design clutch assembly. NO
coupler type / Dog clutch or direct
drives. Multiple disc clutches are
permitted. Minimum 7 1/4 inch diameter disc
and using one (1), two (2) or three (3) disc
design. Limited to magnetic steel discs,
Steel or Aluminum pressure plates.
The disc clutch housing assembly or cover
shall be made from aluminum or steel ONLY.
Any single disc OEM production type clutch
assembly, with a minimum 10 1/2 inch
diameter steel hub disc.
Clutch MUST be mounted inside an
approved bell housing.
21. DRIVE SHAFT
The drive shaft must meet the following
requirements: Drive shaft, universal joints
and yokes must be magnetic steel drive shaft
and be similar in design to standard
production type. Only a one (1) piece
magnetic steel drive shaft will be
permitted. It is MANDATORY that two
(2) 360 degree solid magnetic steel
brackets, NO less than two (2) inches
wide and 1/4 inch thick, be placed around
the drive shaft and torque arm and be
fastened to the cross member of the car. All
drive shafts MUST be painted white or
22. REAR AXLE
The rear axle must meet the following
requirements: Aftermarket racing aluminum or
steel spool axle shafts and gears are
permitted. Clip in axles MUST be
welded in place. Aluminum or magnesium quick
change and non quick change center sections
equipped with aluminum or magnesium side
bells are permitted. If quick change rear
ends are used, only those with magnetic
steel spur gears on the back side, jack
shafts and axle tubes will be permitted.
Quick change rear ends must have the gears
in the rear of the quick change. Front
loaders are not permitted. Ring gear in
quick change and non quick change must not
be smaller than 10 inch. No mini quick or
non quick changes. ONLY locked rear
drive axle assemblies are permitted at all
times during an Event. Limited slip
differentials are NOT permitted. For
purposes of checking a pre determined final
drive gear ratio, when jacked up both rear
wheels must rotate in the same direction
with each traveling the same rotational
distance. The distance, measured from the
center of the rear end housing to the rear
hubs, left and right, at the point the
wheels bolt on, must be within three (3)
inches in length. Only magnetic steel axle
housings permitted. The rear end must be
mounted so that the inside edge of the left
rear tire is even with or outside the
outermost edge of the left side frame rail.
Chemung Speedrome reserves the right to have
all cars use a final drive gear ratio within
the limits set by Chemung Speedrome. If axle
housing support bars are used, they must not
have any method of adjustment.
Sunoco fuel will the official fuel for
Chemung Speedrome for the next 5 years
(starting 2010 season). Sunoco purple 110
fuel will be sold at Chemung Speedrome.
There will be no mixing of fuel and no
additives added to the fuel. Fuel will be
tested weekly. Any fuel not meeting track
specs will be deemed illegal and you will be
disqualified. All car owners in the Sunoco
Mod class is required to purchase and run 5
gallons of the Sunoco 110 fuel each week.
You need to make sure a receipt is given to
you for your purchase. You will be asked for
your receipt at some point during the night
so keep it handy. Your receipt will be
numbered and a copy will be kept in your
file. If you are found not to have purchased
5 gallons of fuel at the track each night
you could lose all money and points for that
night, and a fine may incur.
23. FUEL SYSTEM
Chemung Speedrome will reject any fuel
cells, containers or check valves which
appear to be damaged, defective or do not
function properly. Fuel cell vent pipe check
valves are compulsory. Pressure systems will
NOT be permitted. Any concealed pressure
type containers, feed lines or actuating
mechanism will NOT be permitted, even
24. FUEL CELL
The use of a commercially manufactured fuel
cell is MANDATORY. The maximum fuel
cell capacity, including the filler spout
and overflow, shall not exceed 24 gallons.
The nominal fuel cell dimensions are 24 1/4
inches by 16 3/8 inches by 13 1/4 inches.
Materials other than standard foam, as
provided by an approved fuel cell
manufacturer, are NOT permitted. Fuel
cell must be encased in a container of not
less than 22 gauge magnetic steel. Fuel
cells must be fitted within the container so
that the maximum capacity, including filler
spout will not exceed 24 gallons. Fuel cell
container size shall be 25 inches by 16 3/4
inches by 13 5/8 inches (inside dimensions)
Interior magnetic steel sheet metal must
allow access to top of fuel cell for
inspection. Fuel cell and fuel cell
container must be installed as far forward
as possible in trunk compartment behind the
rear axle and maintain a minimum ground
clearance of five (5) inches. Fuel cell
container must be secured by one (1) inch by
one (1) inch by 0.065 inch minimum thick
square steel tubing meeting the ASTMA 500
specifications or one (1) inch by 1/8 inch
thick magnetic steel straps two (2)
lengthwise and two (2) crosswise. The straps
must be located as close to the fuel filler
check valve housing as possible.
25. FUEL FILLER VENT REQUIREMENTS
The maximum filler spout size is four (4)
inches by eight (8) inches by 18 inches.
26. FUEL CELL VENT (vented as
A single, one (1) inch maximum vent to
outside of body at left rear corner. A fuel
vent flap valve must be used. The fuel cell
check valve vent pipe neck inside diameter
shall not exceed one (1) inch maximum. The
fuel cell vent flexible hose shall have a
maximum inside diameter of 1 1/4 inches and
a maximum length of 60 inches when measured
from the outside end of the fuel cell check
vale vent pipe to the top of the fuel cell
fill plate. A screen cap with a maximum
diameter of 1 1/4 inches may be placed over
27. FUEL LINES
Either (or both) right or left side pickup
in fuel cell may be used as approved by
Chemung Speedrome. ONLY one (1) fuel line
permitted from fuel cell to fuel pump. All
fuel lines are subject to Chemung Speedrome
approval. The fuel lines from the fuel cell
to the carburetor may be relocated to
prevent vapor lock, but must remain under
floor of car unless otherwise approved. When
the fuel line runs through the right side of
the driver’s compartment, it must be
enclosed in a one (1) inch outside diameter
magnetic steel tube. Chemung Speedrome
approved check valve mounted at the line
outlet on the fuel cell is recommended.
Additional lines or extra length may not be
used on the fuel system, Extra fuel lines or
fuel cells, concealed or otherwise
prohibited. It is recommended that an on off
switch be mounted within easy reach of
28. FUEL PUMP
Electric fuel pumps are not permitted.
Cooling of the fuel pump is not permitted.
Only mechanical fuel pumps in stock location
permitted. No Piston Pumps.
29. ENGINE LOCATION
The engine location must be approved by
Chemung Speedrome. The engine must be
mounted between the frame rails in front of
the driver. The centerline of the crankshaft
when measured to the center of the lower
ball joint, left and right, must be within
two (2) inches in distance. Engine minimum
crankshaft center to ground clearance is 9
1/2 inches. The engine may NOT be
30. ENGINE GROUND CLEARANCE
Engine ground clearance will be measured
(with driver in car) at the oil pan. A
minimum height of two (2) inches from the
bottom of the oil pan to ground MUST
be maintained at all times.
31. ENGINE MOUNTS
All engine mounts shall conform to the
following requirements: Engine mounts must
be reinforced and must be acceptable to
Chemung Speedrome. All engine mounts MUST
be securely bolted.
32. ENGINE DISPLACEMENT/COMPRESSION LIMIT
Only "small block" V 8 engines with a
minimum of 350 cubic inch displacement will
be allowed. To clarify the identification of
a "small block" engine, listed below are the
basic engines designated and approved as
"small block" engines. Any engine NOT
listed will be designated as a large block
engine and will NOT be permitted,
regardless of the engine size.
Maximum engine displacement as follows:
1. GENERAL MOTORS 350 CU. INCHES
2. FORD 351 CU. INCHES
Engine displacement may be increased by
boring. Formula for determining cubic inch
displacement: Bore x Bore x .7854 x Stroke
equals cubic inch displacement of each
cylinder. The cubic inch displacement of
each cylinder added together will determine
the total cubic inch displacement of the
COMPRESSION LIMIT: The maximum
compression limit allowed shall be 11.0 to 1
on any cylinder. When calculating the
compression ratio, an allowance of one (1)
cubic centimeter will be added to the volume
for the area around the top of the piston
down to the top of the piston ring that will
be sealed with grease. * The procedure for
checking compression is as follows: Bore x
Bore X .7854 x Stroke equals the Cylinder
Volume of each cylinder at Bottom Dead
Center (bdc) in cubic centimeters. The
cylinder head pour volume minus( ) the known
volume of the cylinder head plate plus (+)
head gasket volume plus (+) 1.00 cc for
sealing piston ring plus (+) the cylinder
block volume minus( ) the known volume of
the block plate equals(=) chamber volume.
(Compression ratio = Cylinder Volume plus
(+) Chamber Volume)
Maximum compression ratio 11.0 to 1, 2600
lbs. after race. 9.6 to 1 maximum will be
given a weight break of 50 lbs. for a total
weight of 2550 lbs. after race. Compression
will be checked with a whistler. V 8 engines
only. NO aluminum engine blocks or heads.
Chevrolet 604 crate
motor now allowed.
GM Chevy 350 cu. In standard production
block with stock external and internal
measurements. Bore size of 4.00 to 4.060
only (+.005 tolerance)
Bowtie Block # 124800474 allowed. Dart block
part # 3116111 will be allowed. Block must
be centered between frame rails and not
tilted. Must be securely mounted to frame.
Center of crankshaft must be within 2 inch
center of thread width.
Only stock production type crankshaft can be
used. Standard steel or cast iron.
Aftermarket crankshafts must be identical to
stock OEM in appearance, construction,
weight and journal size. Counterweights must
be the same shape and size of stock OEM
crankshaft. Minimum crankshaft weight 48
lbs. Chevrolet must use LARGE journal
size crankshaft. Stroke 3.480 only (+ or
.005). Counterweights must remain stock. No
undercutting. No knife edging, tapering or
altering in any weigh. Except for normal
balancing, by drilling, turning, or adding
#. Rod journals stock diameter with
tolerance of .020 Light deburring permitted,
however forging or casting flashing must
remain. Harmonic balancer minimum diameter
6.25 inches. Fluid dampener is legal.
Centerline of crankshaft minimum 9 ½ inches
from the ground.
OEM stock rods or aftermarket rods.
Machining for bushing or full floating is
allowed. 5.700 or 6.000 forged or billet
connecting rod permitted, for Chevrolet.
Aftermarket 5.700 forged or billet minimum
weight 575 total grams. Aftermarket 6.000
forged or billet minimum weight 600 total
grams. Maximum Ford rod length 6.000. NO de burring, de
flashing, polishing abrasive cleaning or
lightening. NO titanium, aluminum, max light
aerospace alloy rods allowed.
Flat top or dished aluminum three ring
pistons only. All three rings in place.
Valve relief’s may be machined in pistons.
Any steel pin may be used.
492, 462, 461and 461x type heads will be
Heads must be any 23 degree, unported cast
iron, from listed manufacture.
Chevrolet – World casting #011150 –Angle
plug, #011250 –Straight plug
Proaction #2234 00000A – Angle plug, #2234
00000 – Straight plug
Proaction #12320 Angle Plug, #12319 Straight
Ford #M 6049 N351, N352
GM Cast bowtie heads #’s, 10134392,
Dart Iron Eagle
Platinum Series Heads will be allowed with a
+50lb weight addition. (2017) 2600lbs +
50lbs = 2650lbs.
Weight MUST be put on hood or subject to
These heads are subject to all other head
ONLY Dart Iron Eagle Platinum Series Heads
#10310010P - Straight plug bare
#10311112P - Straight plug assembly
#10320010P - Angled plug bare
#10321112P - Angled plug assembly
Maximum intake runner 200cc
Maximum intake runner volume of 200 cc’s. No
porting to reach maximum runner volume.
NO G.M. VORTEC
CYLINDER HEADS OF ANY TYPE.
Heads must retain stock internal, external
measurements. No port matching, blending,
porting, polishing, removal or addition of
materials to head. No hand grinding or acid
dipping permitted on any part of the head.
No paint, epoxy fillers, welding or spray
welding on heads. External painting to match
engine allowed. Manufacturers spec and
intake runner CC size will apply on all
heads listed. NO TOLERANCE.
a. All valves must identical in
appearance in construction as OEM type
valve. Minimum valve stem diameter 11/32
inch. Valve stem diameter may be undercut to
a minimum diameter of 15/16 inch in the area
of the valve stem from the head of the valve
to the bottom of the guide.
b. Valve must be solid stainless
c. Valve springs and push rods must
be magnetic steel only.
d. Screw in studs allowed.
e. Roller rockers and girdles are
allowed. No shaft rocker arms.
f. Chevrolet intake valve 2.020
exhaust valve 1.600.
g. Ford Windsor intake valve 1.844
exhaust valve 1.546.
h. Ford Cleveland intake valve 2.046
exhaust valve 1.546.
i. Ford #M 6049 N351 intake valve
2.020 exhaust valve 1.600.
j. ½ inch under valve seat to
complete valve job allowed. Machine cut
only. No polishing or blending.
k. Heat risers can be filled.
l. Multiple angle valve job with
valve centerline and guide angle in OEM
stock location in relationship to the head.
m. No combustion chamber
n. No repositioning head on block.
Stock location only.
o. No air directional devices.
SPEC HEAD OPTION
Dart part number 10024266 cylinder head
casting must be used for this option. The
casting part number must be as produced by
Dart, custom ordering of partial
production/finishing is not permitted.
a. The Dart casting is produced with,
and must maintain a minimum 60cc combustion chamber,
a 2.02” intake valve and a 1.60” exhaust
b. Machining the valve guide bosses
for seals and machining the gasket surfaces
c. The addition of screw-in studs,
guide plates, valve spring seats, valve
seals, poly-locks or jam-nuts is permitted.
d. Coolant lines are permitted on the
front/rear ends of the heads. Coolant lines
are not permitted on the side of the head.
e. Max Intake port volume is 177cc.
Max Exhaust port volume is 71cc.
f. Head gasket surface milling
tolerance is 0.00″ to 0.050″ from true 23.00
degrees of stock valve position.
g. The Intake to pin measurement must
be no less than 6.050”. No other machining
or modifications of any kind are permitted.
h. The ports/runners, combustion
chamber, the valve angle and location must
remain as produced by Dart.
i. The EGR port may be blocked off at
the intake gasket area only, by use of a
metal shim on one surface of the gasket.
j. A maximum of 2 intake mounting
holes may have HeliCoils. Intake and exhaust
mounting holes may not be added or
relocated. Holes must take standard
VALVES - The Manley intake valve
#11596 (111 grams), Manley intake valve
#11864 (114 grams), Manley exhaust valve
#11543 (95 grams) or Manley exhaust valve
#11863 (102 grams) must be used. Valve stems
must have a minimum diameter of 11/32 inch.
Valve lifter weight is 85 grams minimum. All
parts must maintain production dimension and
VALVE JOB - 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. Competition style
multi-angle valve job is permitted. The bowl
area must pass the 360 degree “ball” check
(the appropriate sized ball must not fall
into the guide area when rolling around on
the valve stem). Intake is a .787” ball.
Exhaust is a .531” ball. 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
VALVE SPRINGS & RETAINERS - OEM Stock
type magnetic steel retainers that weigh a
minimum of 30 grams (retainer only) must be
used. Valve springs may be single or double
springs, but must be parallel wound. Barrel
wound, conical wound springs, or beehive
type springs are not permitted. Double
springs must have a diameter between 1.450”
and 1.437”. Valve springs must have a height
of 1.700” to 1.800”. Retainer locks must be
magnetic steel, and must be Machine 7
degree, Super 7 degree, or 10-degree types
ONLY LEGAL INTAKE MANIFOLD FOR THE SPEC
HEAD OPTION WILL BE:
2nd Gen Edelbrock #7101 intake manifold.
a. There are no modifications or
alterations permitted to the intake
b. No porting, polishing, acid
dipping, deburring, de-flashing, abrasive
cleaning, internal painting, milling,
cutting, drilling holes, enlarging bolt
holes, matching of ports or welding.
c. All bolt holes must be in
alignment and same size as stock.
d. Coolant lines are only approved
from the water neck to the back side of
e. The maximum thickness allowed for
the Intake gasket is .064”.
f. Officials reserve the right to swap
competitors intake manifolds at any time as
part of their routine post-race tech
ENGINE MUST STILL ADHERE TO RULES 35 and
36 and maintain 11.0:1 compression.
Flat tappet camshaft only. NO roller
camshaft. NO mushroom or roller
lifters. Lifters must be stock diameter. No
roller camshaft bearings.
Any timing chain and gears may be used.
Degree bushing and offset crank gear keys
may be used. Gear drives may be used.
Roller rocker arms permitted. NO
shaft mounted roller rocker systems.
Magnetic steel valve push rods are permitted
34. ENGINE LUBRICATION
A. OILING SYSTEM
Internal oil pumps driven from the
distributor are required.
B. OIL PANS
Magnetic steel oil pans only.
C. OIL PAN INSPECTION PLUG
Is required on the left side of the oil pan.
The inspection hole must be a minimum of 1
1/4 inch I.D. It must be 9 1/2 inches from
the rear block face to the centerline of the
inspection hole or 4 1/2 inches from the
front block face to the centerline of the
inspection hole and 1 1/4 inches from oil
pan rail. There will NOT be any obstruction
of view from the inspection hole to view
crank and rods.
D. VIBRATION DAMPER
Stock type steel or cast iron. NOT to
be machined or altered in any way.
Battery operated ignitions only. Stock type
point distributor or electronic ignition
allowed. NO ignition boxes or multi
spark systems. Aftermarket coils must fit in
stock location. May use aftermarket H.E.I.
stock replacement type distributor. MSD
H.E.I. # 8365 permitted.
F. WATER PUMPS
Only OEM type steel or aluminum mechanical
water pumps in stock location, turning in
the same direction of the crankshaft
rotation, are permitted. Water pump
impellers may be altered but coolant flow
must be in the same direction as the
Unaltered HOLLEY #4412 500CFM only. HP
Must be approved by CHEMUNG SPEEDROME
officials. Choke horn may NOT be
removed. Boosters may NOT be changed Booster
size or shape may NOT be altered.
NO sideways carburetors allowed. Venturi
area must NOT be altered. Casting
ring must NOT be removed. NO grinding
or polishing. NO modifications to the
base plate. Throttle shafts must remain
standard and must NOT be thinned or
cut. Stock butterflies may be drilled for
idle holes but must not be thinned or
tapered. Removal of the choke plate and
choke linkage. Changing of jets accelerator
pump nozzle, pump cam and power valves
permitted. Alterations to allow additional
air to be picked up below the opening of the
venture such as altered gaskets, base plate
or drilling holes into the carburetor will
not be permitted. No epoxy fillers
36. CARBURETOR ADAPTOR PLATE / SPACER
Only one solid spacer made of aluminum or
phenolic plastic of a maximum height of one
(1) inch permitted. Only one .075 maximum
gasket per side. NO wedge shaped
mounting surfaces, both top and bottom
surfaces must be parallel. Spacer must have
2 holes maximum size 1.750 straight bore and
match the base of carburetor. No air flow
37. CARBURETOR THROTTLE
All linkage must be mechanical type. NO
cable type. Two springs MANDATORY.
Toe strap MANDATORY.
38. AIR CLEANERS AND AIR FILTERS
MAXIMUM OF 5 INCHES IN
HEIGHT. All air must be filtered
through the element. Top of the air cleaner
must be solid with NO holes. Top and bottom
of the air cleaner must be of the same
diameter. NO air induction, ducts,
baffles, tubes, funnels, or hats which may
control the air leading to or through air
filter, or inside air filter to redirect air
into carburetor. The filter base must have a
minimum round opening of 5 inches.. It will
be permissible to shield the front area of
the air cleaner up to a maximum of one half
of the air cleaner circumference and no
wider than the height of the element. A one
(1) inch maximum height spacer may be used
between the carburetor and the air cleaner.
K&N Plastic top and Bottom ARE NOT
Allowed. Only paper air filters will be
39. INTAKE MANIFOLD
CHEVROLET EDELBROCK # 2101
FORD # M 9424 C358 EDELBROCK # 2181 EDELBROCK
NO alterations or modifications to manifolds
allowed. NO coatings allowed on or in
manifold with the exception of paint only on
exterior surfaces. Identification in the
form of cast in part numbers must remain
unaltered on the manifold.
40. EXHAUST SYSTEM
Exhaust headers must be a commercially
manufactured header using a steel primary
tube size of 1 5/8 inch minimum and a
maximum of 1 3/4 inch outside diameter. 1
5/8" to 1 3/4" step header permitted. Must
be a conventional four into one collector
with a maximum size of 3 1/2 inch OD.
Maximum header flange will be 3/8 inch. NO
header plates between heads and headers.
NO adjustable headers. NO inserts
allowed in any part of the header or
collectors. NO 180 degree headers. NO
stainless headers. NO merge. NO
pyramid. No Try y or similar style collector
permitted. NO exhaust pipes allowed in
driver's compartment. NO thermal wrap
permitted on headers. NO crossover
pipes permitted. All exhaust pipes must be a
single round steel 3 1/2 inch pipe, with
muffler (officials reserve the right of
reject improper mounted exhaust systems).
41. HEAT SHIELDS
Heat shields to cover exhaust manifold can
be NO more than six (6) inches wide
and NO longer than the valve cover.
No car will be allowed to race without
mufflers. No modifications of any type
allowed on muffler. The
ONLY legal mufflers
will be: Lobak part #’s 30 12 30, 35 12 35
3” or 3 ½” inlet/outlet with 12” body, Kooks
#R300-10 or Kooks Stafford Spec #R35-35-10.
MUST BE REMOVABLE FOR INSPECTION. All
cars must be a maximum of 95 decibel checked
from the center of the track. 95 D.B.A. is
MANDATORY. Muffler falling off car
may result in immediate disqualification.
The wheels must meet the following
requirements: Only 15 inch diameter five (5)
lug reinforced magnetic steel racing wheels
with a maximum width of 13 inches are
permitted. 12 inch maximum is recommended by
most tire manufacturers. Any offset is
permitted. Wide five bolt pattern
OPTIONAL. Bead locks are NOT
permitted. Maximum tread width is 84 inches
measured from outside to outside tire.
44. LUG BOLTS AND NUTS
Solid heavy duty 1/2 to 5/8 inch magnetic
steel lug bolts and standard one (1) inch
hex by 1/2 to 5/8 inch thick magnetic steel
lug nuts. Lug stud threads must go through
the full thickness of the wheel nut on all
four (4) wheels.
must be purchased only from the Chemung
Speedrome or Spencer Speedway and
scanned/logged into a Drivers Common Tire
Inventory at both tracks to be legal. Tire
purchases prior to the first scheduled race
of the season may be made at Chemung
Speedrome or Spencer Speedway. All tires in
inventory, NEW or USED, must have been/be
purchased at Chemung Speedrome or Spencer
Speedway for use at either track.
Each tire will carry a special bar coded
serial number. The legibility of the bar
code is the sole responsibility of the
driver. This number will be scanned/logged
into a drivers common database designating
it as a tire for use at Chemung
Speedrome or Spencer Speedway. Each
scanned/logged serial number will be placed
in that Drivers Common Tire Inventory that
will be assigned to the driver that the
tires have been purchased for.
In the event a driver changes cars for
qualifying or feature racing, the Drivers
Common Tire Inventory must accompany them to
the new car. Each driver must keep their
Common Tire Inventory current with Track
If a tire cannot be identified, it will be
considered illegal. Chemung
Speedrome/Spencer Speedway Officials may
confiscate and/or impound tires at any time
FULL AMERICAN RACER TIRE PROCEDURES
B. Only "track-plated" American Racer
Tires 27.0/10.0-15, 26.5/10.0-15 & 26.0/10.0-15, EC-31
will be used.
C. Durometer of tires will
be checked. The only approved durometer will
be the Chemung Speedrome official
instrument. A tire minimum softness may be
declared at the beginning of a race event.
Durometer readings may be taken after racing
competition or in the line up staging areas,
any tire not meeting the specification will
be determined illegal, disqualified and lose
all points and money for the night. Tires
found illegal will become the property of
Chemung Speedrome. Any competitor found with
illegal tires a second time will be
disqualified and subject to possible
suspension from Chemung Speedrome, fines may
incur. Any competitor purposely avoiding a
Chemung Speedrome official by running
through the dirt, water, taking extra laps
around the track, etc.. will be determined
to have illegal tires. NO use of bleed off
or pop off type valves. Hand grooving,
buffing, grinding and/or cutting on any area
of the racing tire will NOT be
permitted. Tires that have been altered by
unauthorized treatment will NOT be
permitted. All decisions by Chemung
Speedrome officials will be final.
SOAKING, SOFTENING OR TREATMENT OF TIRES
The JTR Eagle PPM Tester will be set at
a fixed level and will be strictly enforced
throughout the 2017 season.
NOTICE: A participant competing in any
race at Chemung Speedrome/Spencer Speedway 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
subject to disqualification from race,
forfeiting of the event points and monies of
that race, forfeiting all previous points
earned that season and subject to
suspension, determined by Chemung Speedrome/Spencer
MUST MAKE THEMSELVES AWARE OF AND FAMILIAR
WITH THE TECHNICAL RULES IN THIS CLASS.
EVERY INDIVIDUAL AGREES TO BE KNOWLEDGEABLE
AND BOUND BY THE CONTENTS OF THE CHEMUNG
SPEEDROME SUNOCO FUEL WEEKLY MODIFIED RULE