Complete IMCA Old Timers
2012 Rules
Dirt and Asphalt
edited 11-26-2011
I.M.C.A. OLD TIMER
GENERAL RULES FOR EXHIBITION RACING
( ALL CLASSES)
I.M.C.A. Old timers Safety Rules are designed to keep our events as safe as possible and fun for every one. Your full cooperation is expected in meeting these regulations and during tech inspections. It is ultimately your responsibility to insure that your vehicle can be operated in a safe manner at I.M.C.A. Old Timers exhibition events. All Cars will be inspected and must conform to the following regulations.
All vehicles will be inspected by an IMCA Old Timers Inspector prior to participation, failure to have Vehicle inspected before the event will disqualify Vehicle from participation until it has been inspected.
Approved of a Vehicle by the I.M.C.A. Old Timers Inspector shall mean only that the Vehicle is approved for participation in an event and shall not be construed in any way to mean that the inspected Vehicle is guaranteed mechanically sound. Be it further declared that the I.M.C.A. Old Timers shall not be liable, nor the Inspector, for any mechanical failure, nor for any losses or injuries resulting from same.
All Drivers, Owners and Pit crew must sign a Waiver and purchase a Pit Pass before entering the Pit Area. The Drivers and Pit Crew share responsibility in assisting the I.M.C.A. Old Timers in keeping unauthorized Persons from Pit and Track Areas.
Any unsportsmanlike conduct by Drivers, Owners and or Pit Crew shall be grounds for disqualification by the I.M.C.A. Old Timers and will be enforced. Drivers are responsible for the conduct and actions of their Crew Members.
ABSOLUTLEY NO ALCOHOLIC BEVERAGES will be consumed by Drivers or their Pit Crews prior, or during an event.
These Events are to be an EXHIBITION by nature. However motor sports in any form can be dangerous, so the best piece of safety equipment available is a THINKING DRIVER AND CREW.
FLAG RULES
GREEN FLAG - Start, Track is clear.
YELLOW FLAG - Caution, hold position, get car under control, no passing.
RED FLAG- Stop immediately, the race is halted; unsafe conditions exist on the Track.
BLACK FLAG- Stop next Lap, to Driver designated.
WHITE FLAG- You are entering your last Lap.
CHECKERED FLAG- You have completed your last Lap. Race is over.
It is the responsibility of each Driver to know and understand the Track and Flag Rules. No allowance will be made for ignorance of the Rules or inability to see the Flag.
The Starter has complete authorization on the use of these Flag rules.
As the IMCA Old Timers grows and expands, every effort is being made to revise the rules to stabilize car owner cost and ensure that everyone is competitive. The rules are designed to protect owners from getting too eager to out spend their competitors, and maintain overall competition. The quality and professionalism of all of our Club Cars is an absolute must. The Club needs to maintain rigid and tough standards so that the IMCA Old Timers can attract additional Club members who have been driven out of Vintage Racing because of the high cost of Tires, exotic chassis and expensive engines.
If our Club strives to keep all Cars on a level playing field, participants will have a great time and generate memories to share with fellow Club members, Fans and Family. These rules provide Owners who want to purchase Vintage Cars or who already have a Vintage Car an equal chance to win a race and continue to be competitive.
All Cars must be retired from active competition for at least three ( 3)
Years.
We would like all Cars to have a “History”, or be a copy of a real Car.
All Drivers and or Owners must sign an affidavit stating that the Car is not/will not be run at a weekly shows during the IMCA Old Timers Schedule. If caught they will not be able to run with the IMCA Old Timers Schedule for the rest of the Year.
CAR SAFETY RULES ( ALL CLASSES )
1. Helmets must be inspected at the beginning of each year. If Helmets are not cracked and the lining inside is still in tacked and the Inspector OK’s it, the Helmets can be used. BUT, the Helmets must be re-inspected after each accident.
2. NO MOTORCYCLE Helmets are allowed.
3. Fire suits are Mandatory in all Classes of Cars. Racing Shoes, and Gloves are recommended.
4. Arm restraints are required in open wheeled Cars. Stock Cars, Modifies must have a Window Net.
5. Seat Belts must be inspected at the beginning of the Year. The Belt can be used if they are not rooted or frayed, must be re-inspected after each accident.
6. NO SEAT BELTS OR SHOULDER HARNESS MAY BE OLDER THAN 5 YEARS.
7. Each Car should have a Fire Extinguisher in the Pits.
8. A Master Electrical Switch shall be in the Car, located in such a manner that it is accessible from the outside of the Car, near an outside Window opening.
9. The Fuel Cell shall have a ROLL OVER VALVE. This is Mandatory.
10. Seat Belts must be bolted securely to the Floor, BUT it is recommended that they be bolted to the Cage.
11. All Cars MUST have 2 return Springs on Throttle.
12. Kill switch required within reach of Driver, this Switch must be
Clearly marked “ OFF” and “ ON”.
13. Seat must be bolted to Floor or Cage securely.
IMCA OLD TIMERS RULES FOR T.Q.
Weight and dimensions:
Car must weigh a minimum of 450 #
No wider than 55”, measured above the Bulge on the left rear
to right rear Tire.
Construction: ( for that era with Cage)
Roll Cage must be 3” above Drivers Head with Helmet
sitting in Car. Tubing must be min. of 1’ OD. .095
Cage must have Gussets in Corners.
All Cars must have Tails that extend beyond rear Tires.
All Cars must have Fire Wall between engine and Drivers
area, sealed as best as possible.
Car should have a belly pan that covers Engine area back
to just in front of Rear end. No 4 wheel Cars allowed.
Body must be centered on the Chassis.
Battery:
All Battery’s must be securely mounted and covered.
Ignition:
Must have Ignition Shut Off in reach of the driver, clearly
marked ON - OFF
Brakes:
Suggested 4 Wheel Brakes (single Disc Brake is acceptable
On the rear)
Fuel:
Gasoline only, No Additives. Needs to have Fuel Shut Off in
reach of Driver or Crew.
Motors:
Engine size, 45 cubic inch, 4 cylinder.
Gear Ratio:
Any Combination
Exhaust System:
Must be directed away from the Car and off the Track
Throttle:
2 Return Springs on Carburetor Lever
Seat:
Must be bolted or welded to the Frame
Seat Belts:
Must be in Good Condition, mounted securely
(recommended No more than 5 Years old)
Arm Restraints and Neck Braces are mandatory
Helmets, Fire Suits, Shoes are mandatory
Wheels and Tires:
Must be in Good Condition
Drive Shaft Hoops recommended
IMCA OLD TIMERS RULES FOR MIDGETS
Construction and Weight:
A Wheelbase must be 60” or more
B Overall width is 65” (maybe narrower for older Car)
C Car must way 1050 # with all Fluids and driver (may be
Lighter for older Cars)
D Engine can be 4 Cyl. , 6 Cyl. Or V-8
(small cubic inch displacement; 215 cubic inch)
E Car construction
Down Tube Cars ok.
Tube front Axle-or I Beam, rear Drive, Engine off set is 1”
From centerline on Chassis. Torque Tube Drive line.
Driver is seated behind the Engine, centerline of chassis.
Cockpit opening must be a min. of 500 square inches.
All Body panels may be removable, Body must be build on
Center line. Engine must be covert. Belly pans must be
Secured to the Frame, Belly pans may extend from front of
Motor to 2” in front of rear Axle.
Must have Fire wall between Engine and Driver, sealed as
Best as possible.
Fuel System:
A Fuel tank must be mounted on center line of chassis.
B Fuel lines should be high performance Hose and Fittings.
(IE Braided and Stainless AN Lines is recommended)
C Must have a Roll Over Valve
D Must have Fuel shut off device within reach of Driver
Brake System:
A Cars must have a min. of rear Brakes
(four wheel recommended) Steel Brake lines only and
Braided Flex Lines.
Engine Size:
A Push Rod Type is 174
B 4 Cyl. Block or Head is 166
C V 8 is 215 (added weight)
Throttle:
Needs 2 Springs on Throttle Linkage
Fuel:
Gasoline or Methanol (No Additives)
Ignition system:
Must have Ignition shut Off within reach of Driver
Exhaust System:
Must direct Exhaust away from Car and off the Track
Seat Belts:
A Mandatory. Must be in Good Condition (recommended not
Older than 5 Years.
B Arm Restraints Mandatory in all Open Wheel Cars
Seat Cushion or Seat Pad must be anchored to the Car.
Tire and Nerf Bars:
A Tires Must be in Good Shape
B Nerf Bars cannot extend outside of Tire
IMCA OLD TIMERS RULES FOR SPRINT CARS
Dimensions and Weight:
A Wheelbase must be at least 84” long
B Min. weight 1100 #
C Ballast, any Ballast must be bolted securely to the Frame
Construction:
Down Tubes ok. Caged and uncaged Sprints; 1½” OD Wall
Thickness, min 0.950
A Torque Tube Drive lines
B Driver Seat directly behind the Engine on Center line
Cock Pit opening 500 square inches
C Body Panels may be removable, Body’s must be in Center
Line of Chassis, Must have a Hood, Must have a Fire wall
Between Engine and Driver. Sealed as Best as possible.
D Wings are permitted that where in that Era of the Car.
Engine Size:
Any Engine, Air cooled or Water cooled. Carb or Injected
Ok.
Fuel:
Gasoline or Methanol
Must have Fuel Shut Off in reach of Driver
Ignition System:
Must have Ignition Shut off in reach of the Driver
Exhaust:
Must be directed away from Car and off the Track
Seat:
Must be an approved Seat or Cushion and bolted to Frame
Seat Belts:
Must be in Good Shape (recommended not older than 5
Years old)
Throttle:
Must have 2 Springs attached to the Throttle Lever
Brakes:
Must have rear Brakes (recommended 4 wheel)
Steel Brake Lines, and braided front Caliper Lines.
DOT Rubber Lines ok.
Front Axels:
Tube Type or I Beam construction
Tire and Wheels:
Tires have to be in Good Shape, No bent Wheels or Cracks
Nerf Bars cannot be wider than outside of Rear Tires.
IMCA OLD TIMERS RULES FOR COUPES AND SEDANS
1951 and older Coupes and Sedans
Bodies:
Must be Stock appearing and all Steel
Front and Rear Fenders may be removed, Hoods optional
Doors must be welded, chained or securely mounted.
Frame:
Must be OEM style Frame
Drive Shaft Hoop suggested to be , ¼” thick, 2” wide. 6” back from the front U-Joint on open Drive shaft Cars.
Front suspension:
If independent front Suspension is used, Stock lower Control
Arms must be used (min. 5” Coil front Springs)
(ie. Camaro, Nova) I beam front Axle ok.
Rear Suspension:
Rear Leaf or 3 Link ok.; Stock GM Style; 4 Link ok.
Lower Arms must be flat to the World and no more than 2”
Length difference side to side (No Rear Steer)
(Coil over and torsion Bars per Era.
Roll Cage:
Roll cage must be 6 Point, 1.66” min!. Diameter Tubing, .095
Wall thickness. As many Door Bars as possible in both Sides.
Cage must be braced and Gussets welded in. Needs to done in good work man ship.
3 Bars in front of Windshield Screen, from Dash Bar to Roof
Hoop, 5/16” in Size. (this is suggested)
Fire Walls front and rear;
Must seal the Driver from Engine and Fuel tank in Driver area
Battery:
Must be securely mounted and sealed if in Driver area.
This is suggested to have a Master Shut Off Switch, reachable from the Outside by the Crew or Driver.
Ignition:
Must have Ignition Shut Off in reach of the Driver and
clearly marked ON – OFF
Brakes:
Must have 4 Wheel Brakes (Disc Brakes optional)
Brake Lines must be Steel Main Lines, Braided to Calipers
(Rubber Stock OEM Style ok.)
After Market Brake Assemblies ok.
Fuel System:
Fuel Tank must be mounted securely and have Roll Over Valve
a Fuel Shut Off in reach of Pit Crew or Safety Personal (suggested)
One 4 Barrel Carburetor on V-8 Cars.
Mechanical fuel Pump recommended (ie. Electric can be used,
but must have an automatic Oil Pressure Shut Off)
Must have 2 Throttle Springs hooked on Carb. Lever
Engine:
V-8; straight 8; inline 6
Seat:
Welded or Bolted securely to Cage or Frame,
Seat Belts:
Must be in Good Condition (recommended no older than 5
Years)
Window Net is suggested; Arm Restraints mandatory with
Open Top.
Tires and Wheels:
Must be in Good shape, No Cracks.
Maximum Tire width 12”
IMCA OLD TIMERS RULES FOR MODIFIED CARS
AND SUPER MOD’S
Definition:
Modified’s are Cars with any or all of the following
Modifications , fabricated or Tube type Frame, altered
Wheelbase, Engine set back, Body chopped, Body sectioned
or narrowed, Body channeled over Frame.
Car Bodies 1948 and older for Mod. Chevelle Frame or
Monti Carlo (Old Style) 4 Link Frame may be used (Pinto,
Vega Compact Style Body’s) or original Frame.
1948 and older for Super Mods
Front Axle Tube Type or I Beam, Front Suspension open
Steel, Fiberglass Bodies ok.
Construction:
Roll cage 6 Point, 1.66 min!. Tubing thickness and .095, as
Many Door Bars as possible, Leg protector Bar
Recommended, Seat must be bolted or welded to the Frame.
Fire wall between Engine and Driver Compartment.
Fire wall between Fuel Cell and Driver, and Floor Boards.
Sealed as Best as possible.
Three (3) 5/16” diameter Bars suggested in front of Driver
area, in between Dash bar and Roof Hoop of Cage for
Driver protection if a screen is used instead of a Wind-
Shield.
Battery:
Battery must be securely mounted and sealed with a
Cover if it is in Drivers Compartment.
A master switch can be used and it could be reached from
the outside.
Brakes:
A Three Wheel Brakes mandatory (4 Wheel Disc recommended)
B Dual Master Cylinder Mandatory, stock Type or 2
Independent (after Market ok. ie. Tilton,Wilwood…)
C On Board Brake Bias adjusters are legal
D Brake lines must be protected from Header Heat and open
Exposure front and rear Tire.
E Steel brake lines only for Main Lines,(braided Lines from
Calipers to Main Lines ok.)
Front Suspension:
Tube Type, I Beam, or OEM Coil front Clips with Stock
Lower a-Arms (ie. Nova, Camaro clip)must use 5” Springs
min. Coil over accepted if they where build in that era only.
Min. 90 inch Center of Rear Axle to Center of Front Axle.
Rear Suspension:
Leaf Springs, stock GM Style 4 Link is legal.
3 Link Suspension with or without Torque Dampener.
Lower Control Arms must be flat to the world and parallel
With each other, at rest.(NO REAR STEER EFFECT)
Front and rear Torsion Bars, and coil over Springs as per
Era only.
Fuel System:
The fuel tank must be mounted between the Frame rails
Securely. With at least two 2” wide, by 1/8” thick Steel hold
Down Straps on Tank Frame. Roll over Valve a Must.
Flex Lines can be used, regular Fuel line or braided Line
Ok.Fuel lines must be routed away from Header heat and
must Be protected from chafing on any other Objects. Must
be securely anchored.
Fuel Pumps: Mechanical Engine Pump recommended
( Electric Pump can be used, if equipped with automatic
Oil pressure Shut Off Switch)
Drive Shaft Hoop:
Is suggested to be ¼” thick by 2” wide Steel, 6” from front U
Joint.
Ignition Switch:
In reach of the Driver and must be marked ON – OFF.
Wheels and Tire:
Rear wheels No wider than 14”, Tires must be in Good Shape
Seat and Belts:
Seat must be bolted to the cage or frame
Seat Belts must be in Good Condition, highly recommended
No older than 5 Years.
Throttle Linkage:
2 Springs attached to the Throttle Lever
Carburetor:
One 4 Barrel, or one 2 Barrel on V-8
Engine size:
Any 4 Cylinder, 6 Cylinder, or V-8
Exhaust System:
Must be directed away from the Car and the Track
STOCK CARS
IMCA OLD TIMERS RULES FOR STOCK CARS
A. Year 1984 and older Stock Production Frame or Chassis
Is eligible. (Convertibles are allowed) All Windshield
Frames must be in Stock Position.
B. Sheet Metal must be Stock appearing. No flat Sides, No flat
Roof’s, No Wings. Doors must be bolted or welded shut.
C. Steel Roll Cage required, diameter of Tubing min!. 1.660”
Wall thickness .095”. Required Frame mounted at least in 6
Places. (Body mounted Roll Cages NOT acceptable)
Cage must consist of front and rear Hoops, connected by
Tubing on both Sides. Must be securely supported and
Braced. Drivers Head must not protrude above Cage with
Helmet on and strapped in Seat. Min. three Door Bars on
Drivers Side and X Bracing on Pass. Side. (highly
Recommended Drivers left Leg protection Bar left Side; left
Front Cage to Frame Rail)
D. Rear Fascia of the Body between Tail Light area must be
closed in.
E. Rear Suspension: Leaf Spring is legal; Stock GM Style;
4 Link is legal. 3 Link Suspension with or without Torque
Dampener. No Bird Cages (unless welded or bolted to the
Housing, so they can not move)
Lower Control Arms must be flat to the World and parallel
With each other, at rest. (No Rear Steer Effect) No more
2” difference in length.
F. 4” Engine set back maximum allowed. Measured from the
Centerline of the left Side Lower Ball Joint to the first
Spark Plug on Left Cylinder Head. If more than 6” Set
Back, 50 Pounds added Weight in front of Cross Member.
Any more Set Back (12” or more) 100 Pounds added.
G. New Construction Frames must be build with straight up
Perimeter Frame Rails. No Left Side Bias on New Cars.
H. Uni-Body Cars Front Stub and Rear Body Frame Rails
Must be welded together.
I. Three (3) 5/16” diameter Bars required in front of Driver
Area, in between Dash Bar and Roof Hoop of Cage for
Driver protection if a Screen is used instead of a
Windshield. (This is suggested).
J. Frame eligibility subject to Inspection by Club Tec Official
is Mandatory.
K. Full Fire Walls required both front and rear of Driver area
(must be sealed as best as possible)
L. 4 Wheel brakes Mandatory (4 Wheel Disc recommended)
M. Dual Master Cylinder Mandatory, Stock Type or 2
Independent (after Market ok. ie. Tilton, Wilwood or…)
N. On Board Brake Bias Adjusters legal.
O. Brake Lines must be protected from Header Heat and
open exposure to front and rear Tires.
P. Steel Brake Lines only for Main Lines, (Braided Lines
From Calipers to Main Lines ok. Rubber Line ok. If
OEM Style.
Battery;
A. Battery must be securely mounted in a rigid Battery Box
or Tray outside of Drivers area.
B. Plastic Marine Boxes , No matter how they are mounted
to Car are NOT allowed.
Engines:
A. No Aluminum Block Motors .
B. One 4 Barrel Carburetor only, (or One 2 Barrel ok. Also)
Factory Fuel Injection only
C. Two Throttle return Springs Mandatory, hooked to Carb.
Lever. (Spring equipped Throttle Cable is considered
A Return Spring).
D. Gasoline is the only Fuel allowed. (No Additives)
Fuel Delivery:
A. Fuel Cell Mandatory. It must be securely mounted between
Rear Frame Rails. With at least two 2” wide, 1/8” thick
Steel hold down straps on Tank Frame.
Rear protection Bars or Hoops at least as low as the bottom
of the Tank if possible.
B. Flex Lines can be used, Regular Fuel Line or Braided Line
Ok.
C. Fuel Lines must be routed away from Header Heat and
Must be protected from chafing on any other Objects.
Must be anchored securely.
D. Fuel Pumps: Mechanical Engine Pump recommended
(Electric Pump can be used, if equipped with automatic
Oil Pressure Shut Off Switch)
Tires and Rims:
A. Any Racing Tire, this will keep the cost down. Tires either
New or used, But in Good Shape.
B. No Rims wider than 12”
C. Should be the same size Tire used in that Era.
Drive Shaft Loop:
Drive Shaft Loop is recommended approximately 6” back
from the front of Drive Shaft. ¼’ Steel by 2” wide.
Car weight, Stock Stub Chassis: V8 Car – 2850
6 Cyl. Car – 2000 ?
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