2013 Modified Rules
Rules are subject to change. Any part found illegal will be
confiscated by track officials and remain track property.
If found illegal, driver will receive last place points and money.
ATTENTION MOD DRIVERS - If needed 6" body rake will be measured at a
4" ride height.
11" motor height will be measured at a 4" ride height.
Minimum Oil Pan depth 6 1/2"
1. SAFETY EQUIPMENT:Snell-rated SA2000, SA2005, SA2010 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
extinguisher required. 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. No sports car frames. No strut front suspension of any kind
allowed. Tube front clips will be allowed but must be Roger Winget chassis
built before 12/12.
Frame cannot be widened or narrowed. 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 cross member 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. . 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 cross member, in race
trim.
Left side frame rail must run to interior footbox.
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. Driver's 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,
weather roof or roll cage, and the highest point at bottom of window, weather
interior or body. May use Lexan in sail panels. No full windshields. Roofs must
be fiberglass or plastic (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 is allowed, with all
braces to the rear of the spoiler.
* Body rake and motor height will be checked at 4" ride height. (revised 01/12)
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.
6A. MIRRORS/RADIOS: No mirrors and/or two way radios are not permitted in the
car or in the driver's equipment. All divisions must have a RACEceiver radio
system.
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.
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. After
market center links could be phased out in the future.
9. SHOCKS:Front shocks must be steel body, twin tube, with a racer cost of
$125 or less. No gas pressure shocks will be permitted.
Rear shocks must be steel, Non-adjustable, with No external canisters, and have
a racer price of less than $250.00 new per shock. One (1) shock per wheel, with
one (1) additional shock allowed in the lift / pull bar area. No air shocks. No
shock covers.
No bump stops or chassis limiting devices.
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. Maximum swaybar diameter 1 1/8.
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 panhard bar adjuster allowed. No bird cage
type suspensions.
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.
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.
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, no alcohol allowed.
20. WEIGHT: Minimum weight limit of 2,400 pounds, 58% left side weight (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 cross member, 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
scatter shield.
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 cross member 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. Minimum 6 1/2" Oil
Pan. One (1) naturally aspirated two or four barrel carburetor only. (No fuel
injection) No magnetos. No external oil pumps. Intake must be steel or aluminum.
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.
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)52" Max. – 42"Min.
(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 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.
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