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USA
MODIFIED RULES
International Championship Auto Racing
2009
UNITED
ASPHALT MODIFIED RULES
Revised 12/02/2008
CLICK
BELOW FOR IMPORTANT INFORMATION
Note: Sanctioning Body and/or Track does
not express or implies any warranty of safety resulting from the
publication of, or compliance with these rules and/or
regulations. These rules are intended as a guide to conduct this
sport and are not in any way a guarantee against injury or death
to any participant, spectator, or official.
1.
SAFETY
EQUIPMENT:
Snell-rated SA95, SA2000, SA2005 helmet required. Roll bar
padding required in drivers compartment (Fire retardant
highly recommended). SFI full fire suit required.
Fire retardant neck brace, gloves and shoes required. (Fire
retardant head sock and underwear; head and neck
restraints; collapsible steering shaft; highly recommended).
Driver side window net required, and must be mounted so that the
latch is at the top front of window. Minimum three inch wide,
five point safety belt assembly required, must be mounted
securely to the role cage. (Highly recommended to be no
more than one year old). Fire Bottle system required. (A
separate, heat activated, Fire Bottle on the fuel cell is highly
recommended) Kill switch required within easy reach of
driver and must be marked OFF and ON.
2.
FRAME:
1964 or newer OEM perimeter American made rear wheel drive
passenger car frame only. (Reproduction 68-72 Chevelle frames
are approved). No sports car frames. No 2002 & up Ford Crown
Vic or similar frames allowed. No strut front suspension of any
kind allowed. No tube clips allowed. Frame must be full and
complete, cannot be widened or narrowed, and must be able to
support roll cage on both sides. Exceptions: Weight
jack in original center line of spring tower; frame may be cut a
maximum 36 inches forward from center of rear housing; horns may
be removed in front of steering box; front crossmember may be
notched and boxed for radiator and/or steering clearance;
maximum 7 inch wide opening in side of spring tower for spring
removal. OEM upper A mounts may be replaced with aftermarket
mounts. Maximum 4 inch wide by 4 inch tall frame stiffener may
be welded directly to outside of left OEM frame rail. Left side
OEM frame rail may be notched for seat and foot clearance.
Minimum wheelbase 108 inches, maximum 112 inches, both sides.
Maximum overall width, front and rear, shall not exceed 78
inches from outside of tire, to outside of tire. No part of
frame or body shall be lower than 4 inches from ground, except
the front crossmember, in race trim.
3.
ROLL CAGE:
Must
consist of continuous hoops, minimum 1.75 inch O.D. tubing, with
a minimum wall thickness of .095 inch for the main cage. Frame
mounted in at least 6 places, low carbon or mild steel
recommended. Must consist of a configuration of front, rear, and
top hoops connected by tubing on the sides or side hoops.
Drivers head must not protrude outside cage with helmet on.
Roll cage must be securely supported and braced with minimum 1
cross bar in top halo. Foot protection bar(s) required. Main
cage no further forward than rear of engine. All bars forward of
the cage must be lower than the hood.
4.
DOOR BARS:
All driver
side door bars and uprights must be a minimum 1.75 inch and .095
inch wall thickness. Minimum 4 driver side door bars, parallel
to the ground and perpendicular to the driver, and welded to the
front and rear roll cage. Passenger side must have at least 1
cross door bar, horizontal or angled, and 1 top door bar,
minimum 1.5 inch O.D. Steel door plate, 16 gauge (.065) minimum
thickness, must be securely welded to outside of the driver side
door bars and cover the area from top door bar to bottom door
bar and from rear hoop down post to front cage down post.
5.
BODY:
(See Diagram) must be same width, front to rear, and
parallel to the OEM frame. Engine compartment must remain open
on both sides. Hood must be enclosed at rear. No panel in front
of right door to engine compartment. No inner panels. Must have
front windshield support and rear window support posts. Driver
and passenger side windows must have at least 12 inch opening (height
and width), measured at center of window, between lowest
point at top of window, whether roof or roll cage, and the
highest point at bottom of window, whether interior or body. May
use Lexan in sail panels. No full windshields. Roofs must be
fiberglass or aluminum (no carbon fiber) full size,
rounded and stock appearing (No flat roofs). Must run
full upper and lower nose. No plastic body parts. Exception:
Howe part #s 622 & 624 are the only approved plastic
body parts. No wings or aero dynamic devices inside or outside
the car. Outside of tires must be the widest part of car.
Quarter panels and B/C pillars must be 2 distinct pieces. Oil
coolers/radiator must not protrude above interior or outside of
body. (Spoiler:) A 4 inch by 66 inch spoiler 45 degrees
to the deck is allowed, with all braces to the rear of
the spoiler. (
Amended 12/ 01/2008 ) Spoiler must be 1 piece **(Amended
6/27/08) Roof
must mount within ½ to the top of the cage and still meet
existing roof rules, and Diagram (M).
6.
DRIVER COMPARTMENT: Must have a
minimum 3 windshield bars in front of the driver. Lexan or
aluminum cowl panel in front of the driver can be no wider than
the cockpit and no farther back than the steering wheel. Minimum
.125 inch aluminum, or 22 (.035 inch) gauge steel, complete
floor pan required. Aluminum high back seat only and must be
bolted in securely, inside the left OEM frame and ahead of the
rear tires. Bottom of seat can be no lower than bottom of frame.
(NASCAR style right and left head, shoulder supports and leg
restraints highly recommended). Driver must be sealed off
from track, driveline, engine, fuel cell, battery and pumps. No
driver adjustable devices allowed in cockpit except brake
adjusters. Mirrors in the center of car and/or Radios allowed.
7.
FRONT SUSPENSION:
All
components must be steel, unaltered OEM, in OEM location, and
replaceable by OEM parts. Exceptions: Tube type upper A
frames with or without aluminum or steel cross shaft, and mounts
can be moved; stamped steel OEM replacement lower a-frames;
rubber, nylon, or steel lower a-frame bushings; no offset
bushings; welded or bolted shock mounts on lower a-frames; (No
fabricated lower a-frames); Lower a-frames must be right and
left, and of the same design. Lower a-frame mounts and bolt
holes on frame must be in OEM location. OEM type ball joints
only. Sway bar must be OEM type, no splined bars.
8.
STEERING:
No rack and
pinion. All components must be steel, unaltered OEM, in OEM
location. Exceptions: tie rod ends and adjuster sleeves
may be replaced by a minimum .625 inch steel rod ends and steel
tubes; OEM spindles can be modified for ball joints and tie rod
ends; passenger car drop spindles allowed; (No made for
racing or fabricated spindles.) Bolt on
spindle savers allowed; spindles must be right and left, and of
the same design; steel steering shafts and knuckles only;
steering quickener, steering wheel and quick release may be
aluminum; driver compartment steering may be modified, but must
be kept on left side. OEM center link or OEM after market type
center links allowed.
9.
SHOCKS:
(Amended
12/10/07) Shocks must be, Non-adjustable, with No external canisters,
and have a racer price of less than $250.00 New per
shock. 1 shock per wheel. 1 additional shock allowed in the lift
/ pull bar area. No air shocks. No covers.
10. SPRINGS:
Steel
coil and leaf springs allowed. Coil springs must be at least
4.5 inches O.D. No torsion bars or air bags. Exception:
Pull bar may utilize smaller O.D. springs.
11. REAR SUSPENSION:
No independent rear
suspension. All components must be steel.
No covers allowed. All trailing arms/link bars must be made of
steel tubing. Rear of frame may be altered to accept leaf or
coil springs. Steel coil-over eliminators, and steel or aluminum
(5) coil-over kits, allowed on the rear only. Must conform to
shock and spring rules. One (1) mechanical traction bar only. No
rear sway bars. Aluminum panard bar adjuster allowed.
12.
REAR END:
Any steel
approved OEM passenger car or truck rear end allowed. Closed,
steel tube Quick changes allowed. Safety hubs (floater)
mandatory. Steel axles only. No cambered rear ends. One (1)
piece drive flange only. All components must be steel.
Exceptions: lowering blocks, axle caps, rotor plates, and
drive flanges.
13.
BUMPERS:
(See
diagram) Steel bumpers must be on front and rear at all times
and welded or bolted securely to the frame. Must be a minimum
1.25 inch O.D. tubing, .065 wall thickness. Two bar front bumper
must be mounted frame end to frame end, no wider than width of
OEM frame horns. Bottom loop must be parallel to the ground. Top
bar must be directly above bottom bar, minimum 6.5 inches apart,
measured center to center. Aluminum I-beam rear bumper are
allowed. No sharp edges.Rear(
Amended 12/ 01
2008 )
bumper must have nerf bars on each side rounded back to main
frame. Bumper must be same width of quarter panels.( See Z on
body panel rules )
14.
WHEELS:
Eight (8)
inch steel wheel only, measured from inside bead to inside bead.
No bead locks, screws, or rim mounted bleeder valves. Steel and
aluminum wheel spacers are allowed.
15.
TIRES:
No
softening, soaking, conditioning, siping, or grooving of tires.
No re-caps. Soaking of tires is strictly prohibited.
(This rule applies to ALL tires in the pits, on the car, in the
trailer or hauler, ALL tires) Tires may be checked at any
time. (Amended
03/20/08)
USA Tire
Rule: In
an effort to control the escalating costs of racing we have
implemented a two (2) Hoosier 970 Tire Rule. The first two (2)
races of the season a competitor may buy four (4) branded,
Hoosier 970 Tires at each event. After the first two (2) races,
competitors will be limited to two (2) new branded tires
per race, purchased at the race track and two (2)
branded, used tires, from their own inventory. If a competitor
did not race the first two (2) races and wishes to race, he will
be allowed to purchase used, branded tires from another USA
competitor or bring used 970 tires and/or buy two (2) new
branded Hoosier 970 at the track. Non-branded used tires must be
approved by the Tech Officials. (NOTE: Used means USED,
not scuffed!) All decisions by Officials final.
16. BRAKES: Must be
steel OEM type, operative on all 4 wheels, drum or disc. Must
maintain minimum OEM dimensions for hub/rotor and calipers,
cannot be drilled or lightened. Bolt pattern may be changed.
Larger studs allowed. Rear rotors may be aftermarket, minimum
.810 inch thick, vented rotors only. No scalloped or drilled
rotors.
17. EXHAUST: Round tube
headers only. All primary tubes must enter into 1 collector, at
the end of the header. Mufflers required. Right side exhaust
must exit under the car (not out right side door).
18. FUEL SYSTEM: Mechanical or
belt driven pump only and must be mounted on front of motor.
Racing fuel cell required 22 gallon maximum capacity, square or
rectangle in shape (no tear drop, wedge, or exotic F-1 type
fuel cells allowed). Must be in a minimum 22 gauge
steel container. Cell must be securely mounted behind the
rear axles and between the rear tires. Cell must be no lower
than bottom of rear end housing. Cell must be mounted with a
minimum 2 solid steel strap around the entire cell, 2 inches
wide and .125 inches thick or equivalent. All cell mounts must
be steel and securely welded or bolted to the frame. Protective
tubing must cover rear of cell and extend past both ends of the
cell. No part of the cell is to be lower than the protective
tubing. Vents and lids must have check valves. Fuel line pick up
must be on top of cell. No cool cans and (1) fuel filter only.
19.
FUEL:
Racing gasoline or alcohol allowed.
20.
WEIGHT:
Minimum weight limit of 2,400 pounds, 1000lbs. right side
(No Tolerance), after race with driver and helmet in
car setting in normal driving position. Weights must be
securely mounted with at least (2) half inch bolts to frame or
roll cage, and painted white with car number on it. No weight
outside of the body. No titanium, carbon fiber, or exotic
materials used on race car. No gun-drilled, tubular, hollow
bolts or studs. Steel fasteners only.
21.
BATTERY / STARTER: One 12/16
volt battery only, must be securely mounted between frame
rails, behind crossmember, in front of rear end and outside of
driver cockpit, with positive terminal covered. Car must have
the capacity of starting without being pushed or pulled.
Standard or reverse mount starters allowed.
22. GAUGES / ELECTRONICS:
No
electronic monitoring computer devices capable of storing or
transmitting information. Exception: Analog tach. No
adjustable ignition control boxes. One (1) 12/16 volt ignition
box allowed, with rev chip, must be out of reach of driver. No
additional ignition accessories allowed. No magnetos. No
traction control devices.
23.
TRANSMISSION:
Must have
at least two forward gears and one reverse, plus a neutral
position. With engine running and car in still position, must be
able to engage car in gear and move forward, then backward. OEM
production type or approved aftermarket transmissions (Bert,
Brinn, Falcon) allowed. (2-speed, 3-speed, 4-speed and
automatic). No 5-speed or more transmissions, No in and
out boxes allowed. Standard clutch type transmissions must have
a blow proof bell housing (steel or aluminum). Automatic
transmissions must have an approved scattershield.
24.
DRIVE SHAFT:
Minimum 2.5
inch diameter, steel drive shaft, painted white. Steel
slip-yokes only. 360 degree drive shaft loop required and must
be constructed of at least .25 inch by 2 inch steel or
equivalent, mounted 6 inches back from front u-joint.
25. ENGINE COMPARTMENT:
Rear of engine must
be mounted at least 72 inches forward from centerline of rear
axle. Engine offset must be kept within 2 inches of centerline
of front crossmember with engine level. Minimum 11 inches from
centerline of crank shaft to ground. Radiator must be mounted in
front of engine. Cooling system may be modified. No anti-freeze.
26. ENGINE: Any
American make engine allowed. Steel block. No machine work to
the outside of block (lighting). Wet sump oiling system
only. One (1) naturally aspirated two or four barrel carburetor
only. (No fuel injection) No magnetos.
27.
NUMBERS / DECALS: All numbers shall be in contrasting
color from body, affixed to both doors and top, be
at least 4 inches thick and 20 inches tall, and be readable from
the passenger side of car. Competitors are to reserve the front
24 inches of each door and the first 6 inches of the roof for
Sanctioning Body and/or Track Sponsors. (Failure to run
sponsor decals will result in 50% loss of purse.)
28. OVERALL: (A)
Sanctioning Body and/or Track reserves the right to change,
modify, add or delete to these rules as they deem necessary to
ensure fair, competitive, and affordable racing. (B)
Sanctioning Body and/or Track reserves the right to
confiscate any part or parts deemed by their Officials to be
outside the rules. This to include tires, or any other part(s)
of any race car, at any event, at any time. (C) E.I.R.I.
(Except In Rare Instances) All decisions of the Officials
are final and binding without exception.
29. GENERAL COMPETITION:
(A) Drivers shall be responsible for the conduct and
actions of all crewmembers, and any unsportsmanlike conduct
shall be grounds for disqualification or punitive action as
determined by Sanctioning Body and/or Track. Sanctioning Body
and/or Track shall have the authority to disqualify members and
assess fines. (B) All discussions with Officials shall
be conducted in a professional manner and at a proper distance.
(C) Drivers under the age of 18 must produce a signed and
notarized Parental Consent form by Parent or Legal Guardian.
(D) Sanctioning Body and/or Track may require, at its
option, a competitor(s) to under go a physical or drug testing
before said individual(s) are allowed to compete.
The
absence of a particular rule does not necessarily
mean its approval!
ASPHALT BODY DIAGRAM & DIMENSIONS
(A)
20 Max. 16 Min.
(Ground to center of bumper front & rear)
(B)
6.5 Min. (Center to
center)
(C)
46 Max. 42Min.
(Amended 6/28/08)
(D)
6 Max. Hood sides
3 Max. Rake in hood.
(E)
32 Max. (Bumper &
Nose)
(F)
6 Max.
(Scoop/Deflector)
(G)
4 Min. at Nose and
Sides 8 Min. at Quarters
(H)
19 Max. (Same both
sides)
(I)
112 Max. 108
Min.
(J)
29 Max. 22 Min.
(K)
72 Max. Or not past
back of block, right side. Left side may extend forward to cover
foot box if necessary.
(L)
18 Max. 12 Min.
Opening, both sides.
(M)
With 4 level, must
have 2 gradual clearance at rear and no more than 5 at front
(N)
120 Max. 106
Min.
(O)
45 Max. 34 Min.
(P)
3 Max. height at
rear of sail panel, gradual slope from roof to this point. (4 x
66 Max. spoiler 45 degrees to the deck is allowed with supports
to the rear only.)
(Q)
Interior slope is
6 Maximum. Front to rear and flat across. If flat at
front half of interior you have used up 50% of your 6 so from
behind the driver to the rear you only have 3 of slope. Top of
interior must be flush with top of doors and quarter panels.
(R)
38 Max. 28 Min.
(S)
38 Max. 24 Min.
(T)
66 Max. 24 Min.
No narrower than radiator
(U)
52 Max. 44 Min.
(V)
56 Max. 41 Min.
(W)
Tires must be the
widest part of the car. Must be able to see side wall of tire
from front, top, and rear.
(X)
66 Max. 53 Min.
(Y)
8 Panel / 90
degrees to ground. Must be solid, attached to the deck and
extend to the quarter panels, securely fastened.
(Z)
Aluminum I beam or
tubular steel rear bumpers allowed, must have rounded
nerf bars that follow quarter panel and connect back to frame on
both sides.
All Rights Refused: Feel free to copy these rules and use in
any way, shape or form. Lets keep asphalt modified racing
affordable and all on the same rules!
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