NORTHERN NEVADA
RAT MODIFIEDS (RAT MODS)
CLASS DESCRIPTION:
This is a low cost open wheel
class that uses readily available production components in construction. This
class is designed to be a crowd pleaser and provide the drivers with competitive door to door racing.
Engine & Drive Train
1)
Engine maximum displacement is 323 cubic inches.
2)
Flat top pistons only.
3)
Single flat tappet cam only. No roller drive train.
4)
Must be naturally aspirated. One (1) two barrel carburetor.
4412/500 cfm, one (1) spacer/adapter of one (1) inch maximum is allowed.
5)
Single/dual plane manifolds OK.
6)
No purpose built race engines.
7)
No mid/rear engine vehicles.
8)
No front/all wheel drives vehicles.
9)
No electronic traction control devices allowed.
10)
Engine heads and block shall be cast iron with OEM casting numbers.
V-6 motors can run aluminum OEM heads. V-6 blocks must be cast iron or World Product head.
11)
Heads will be as delivered from factory with no modifications.
No porting, profiling or polishing.
12)
Number one (1) spark plug shall be no more that sixteen (16) inched behind spindle centerline. (V-8 and inline 6 engines) V-6 engines will be measured from the rear of block to
spindle centerline a total of 34 inches.
13)
Engine offset must be kept within two (2) inches of original frame’s center.
14)
Cooling system may be modified. Any overflow tubes
must be directed to the ground, between frame rails. Radiators will be mounted
in front of engine.
15)
Transmission must have one forward gear, a reverse gear, and a neutral position. Only OEM production transmissions will be allowed. Manual
transmissions must have a working single disc-type clutch with an all steel flywheel.
Automatic transmissions must remain in OEM stock automatic case with a functional torque converter. Original bell housing must remain.
16)
No “in and out” boxes or quick change devices allowed.
17)
Must have an approved scatter shield or blanket. Scatter
shield shall be constructed of not less than ¼ inch by three (3) inch steel, 270 degrees around flex plate/flywheel. Steel bell housing is allowed.
18)
No purpose built racing rear axle allowed. Must be
semi-floating. Lockers are allowed.
19)
Drive shaft must be solid, one piece, and painted white.
A 360 degree drive shaft hoop required. If sitting over drive shaft there
must be a complete hoop.
Body,
Frame & Bumpers
1)
Vehicle must be identifiable by tech. All vehicles
must have a body be start of 2009 race season. No grandfathering.
2)
Body must retain from body donor, the base of windshield pillar to window post and entire rear
quarter panel with roof. Doors can be made is sheet metal. Doors must conform to rear quarter panel.
3)
Any full frame vehicle can be used.
4)
Entire body must be inside of all four wheels.
5)
Body shall be enclosed at the rear and resemble production vehicle.
Plastic tail light lens and trim are allowed. Plastic vehicle names or
manufactures are allowed on rear only.
6)
Center or left hand drive allowed. Driver must sit
in front of u-joint and must have a protective plate around u-joint.
7)
Engine hood cover required. Engine compartment will
remain open, no side panels. Hood sides may have a maximum of two (2) inch drop
and hood shall not extend above mounting point. Hood must extend minimum two
(2) inches past radiator. Front grill or nose piece is optional.
8)
Maximum hood scoop height is six (6) inches.
9)
Minimum 18 gauge steel firewall and steel floor. One
eighth (1/8) steel cover, to include sides, over driveline, on center drive cars.
10)
The body may be channeled over the frame.
11)
Minimum of ninety-six (96) inch wheel base right and left side wheel base shall be within one (1)
inch of each other.
12)
Removal of frame behind rear most suspension mounted is allowed.
13)
NO part of racecar can be lower that four (4) inches measured from the ground up.
14)
Banana wing is optional. Wing will be four (4) feet
by four (4) feet with no side boards over one (1) inch extending top or bottom. No
wikerbills. No adjustments from the cockpit of the car allowed.
15)
Maximum spoiler height is six (6) inches measured from deck up.
16)
Center of bumper, front and rear, must be 18 inches, plus or minus two (2) inches, from the ground
up.
17)
Steel bumper must be used both front and rear and securely mounted with minimum 3/8 inch bolts
or welded to the frame.
18)
Bumpers must be made of minimum 1.25 inch OD tubing, .065 wall on front and .095 wall on rear and
able to support car when lifted by wrecker.
19)
Two bar from bumpers must be mounted to the frame end-to-frame end, no wider that the width of
the frame horns, with the bottom loop parallel to the ground and no more than eight (8) inches or less than six (6) inches
center to center from top loop.
20)
Top loop must be directly above bottom loop.
21)
Two-bar rear bumper shall be no wider than the outside of the rear tires and no narrower than the
inside of the rear tires with the bottom loop parallel to the ground and no more than eight (8) inches or less than six (6)
inches center to center from top loop. Bumper must extend out from frame a minimum
of ten (10) inches.
22)
Steel nerf bars are required and must not extend beyond the width of rear tires.
23)
IMCA chassis are allowed, but must correspond with suspension, steering and brake sections of these
rules. Engine rule also.
Suspension,
Steering & Brakes
1)
Front suspension type must be OEM as delivered with frame and must replace with stock parts. Non-adjustable tubular upper control is OK.
Lower control arms must be OEM. Top mounting points may be removed.
2)
Shock mounts location is open.
3)
No fabricated spindles.
4)
Spindles can be ground for brake caliper clearance only.
5)
If used, front sway bar must on OEM approved.
6)
Suspension, steering and rear end parts must be steel.
7)
Any make production rack and pinion allowed.
8)
Steel steering shafts and knuckles only.
9)
Steering may be modified to suit driver’s taste. Must
be kept between frame rails.
10)
Steering quickeners are allowed.
11)
No device allowed that would enable driver adjustment to alter wheelbase or for weight jacking
while car is in competition.
12)
OEM auto or truck leaf springs must be used in rear suspension as intended by frame manufacture. Mounting points may be changed. Single
or multi leafs OK. Leaf springs must support race car. Spring sliders OK.
13)
One shock per wheel only. No remote adjustable shocks. No
are shocks/bags allowed.
14)
Four (4) coil over per car, one (1) per wheel allowed. Coil
over eliminators are allowed. Maximum of five (5) shocks.
15)
Brakes are open as long as spindles are OEM. Brakes
are required on at least three (3) wheels and may be converted to disc. Driver
brake bias control is allowed.
16)
Heim joints allowed only is steering shaft supports and shocks, torque arm, and pan hard bar.
17)
Weight jacks OK.
Tires
& Wheels
1)
Wheels must be steel and no more that ten (10) inches wide.
Right rear wheel only, is allowed a bead lock. Wheel spacers shall not exceed one (1) inch thick.
2)
DOT tires, track tires, Eagles or Hoosiers allowed. No Dirt Bosses allowed.
3)
Mandatory one (1) inch lug nuts.
Roll
Cages & Safety
1)
Roll cage shall be constructed using 1.5 inch OD steel tubing or greater with a minimum wall thickness
of .095 inches. No tubing on the car can be any greater that two (2) inches in
diameter. Six (6) point cage consisting of a four-point center section, and “kicker
bars”. Center section of cage must consist of main hoop with “X”
bracing and halo that clears the drivers head when strapped in with helmet on. The four points of the cage center section
must be securely welded to the car’s frame rails.
2)
Rear kicker’s bars are required to have cross bracing or any type of reinforcement.
3)
Front cage hoop permitted.
4)
Bar across back of engine is required.
5)
No brace bars forward of cage may be higher that hood height.
6)
A minimum of three (3) sides door bars, at least 1.5 inch OD is required on each side of car if
center drive. Left side drive requires at least two (2) vertical bars on right
side. They must be as parallel with the frame as possible and located perpendicular
to the driver so as to provide maximum protection for the driver. Bars should
not cause difficulty in getting into or out of vehicle.
7)
Sidebars must be welded to the front and rear of the roll cage members.
8)
Full size window nets are required on driver’s side or both sides if driver sits in center.
9)
Window nets to be mounted so latch is at top front or window.
10)
Roll cage padding will be mounted to all areas of roll cage when the drivers’ body may come
in contact with the cage or any other part of the interior.
11) Each race team must have a fire extinguisher in or on the trailer
or rear of the tow vehicle. Must have car # painted on it and accompany driver to pre tech.
Fuel
and Fuel Cell
1)
Pump gas or race fuel allowed.
2)
No alcohol or nitrous oxide allowed.
3)
Electric fuel pumps allowed with functional inertia switch in drivers reach.
4)
Car must weigh 2000 lbs wet with driver at the end of the race.
5)
Loose object and/or weights no to be used outside of the body or hood area.
6)
Ballast must be secured by two half-inch bolts or equivalent structural engineering. Ballast must be painted white and have the car number on it.
