CANADIAN VINTAGE MODIFIEDS TECHNICAL RULES 2007 - 2009

1. ELIGIBILITY
Races are open to all models of pre 1948 Canadian and American closed cars. Original metal bodies only. Pickups, Station Wagons, Convertibles and Roadsters are not eligible.

2. BODIES AND FRAMES
(a) FRAME RULES:
1. The only legal frame accepted by the O.A.R.C. will be the O.A.R.C. tube frame. It must exactly follow the specifications outlined in the back of the book.
2. Entire frame must be 2" X 3" X 0.100" minimum wall thickness. Rectangular steel tube up to builders’ choice, including mandatory cross members, but not optional cross members. 2" X 3"
3. Because of manufactures thickness tolerances, there will be a 10% undersize allowance in frame and roll cage thickness specifications.
4. Front and rear builders’ choice must be 2" x 3" rectangular steel tube, including cross members.
5. Cross members must be full width of frame and added to the end of builders’ choice rails.
6. Optional second cross member may be manufactured out of any type steel material.
7. Builders choice may be drilled to provide crush zone but no drilling in cross member.
8. Main frame rails may not be pierced, drilled or otherwise altered for the purpose of reducing weight. The only holes allowed are for component attachment only.
9. Frame rail must be straight between front and rear builders choice areas, as outlined in the back of the book.
10. All new cars and any frame repairs undertaken after February 2007, must have a gusset 1/8" X 2" X 2" added to all vertical welds in the frame. See diagram in back of book.
(b) Minimum ground clearance is 6.5" to bottom of frame rails, including builders choice. Measured with the driver out of car. Car will be checked with a minimum air pressure of 20 PSI on left and 30 PSI on right. Note, the cross member is an integral part of the frame and therefore must abide by the 6.5" frame rule. Air pressure adjustment will be allowed 20 PSI on left and 30 PSI on right maximum. (c) Maximum offset on all cars to be measured from back of vertical rim bead to surface of frame rail. Difference in measurement from side to side may not exceed 3". You must provide access to measure.
(d) Cowl may be cut back to original hood line. Firewall must be within 15" of rear of engine measured straight back from center of block. Firewall may not extend forward past front edge of front cowl, except for foot box. Firewall must be made of sheet metal, (min. 20 gauge) must completely separate driver from engine compartment. Firewall must extend to the body sides and be securely fastened.
(e) Rear firewall must be 20 gauge metal and firewall must completely separate driver from gas tank compartment. Firewall must extend to the body sides and be securely fastened.
(f) Floor must be closed in to the sides of the body from front to rear firewalls. May be done by installing sidewall liners up roll bars and across to window frames. Maximum height of the floor, measured above top of transmission, is 6". (20 gauge metal)
(g) Cars must be properly painted, including frames and roll cages and numbers within two weeks from
original appearance at track (or after sustaining damage) and maintained in proper condition for the remainder of the year. If the car owner does not adhere to this rule in the allotted time, the car in question will not be permitted to run.
(h) All cars will have the club's major sponsors' decals placed on the cowl panel below front window posts in the order prescribed by the club. This space must be kept for club use only.
(i) Numbers must be minimum 18" high by 2" thick and must be on each side and on the roof facing outside of track. Numbers must be a contrasting color to the rest of the car. Subject to club approval. All cars must have a small number (approx. 3" X 3") in top right corner of windshield or body, visible to aid track starters with lineups.
(j) Minimum height from ground to highest point of natural body is 56", measured with the driver out.

(k) BODY RULES
1. Bodies must not be offset, side-to-side. Bodies must be centered on main frame rails. Maximum ± ½” off center.
2. No chopping of tops, no sectioning of body. Body to be considered driver’s compartment and cab. 3. No spoilers
4. No wings
5. No fenders, outside of body
6. No air dams.
7. Grills allowed, no die cast grills.
8. Nothing in front of radiator except grill and air scoop to move air into the radiator. Air scoop must not extend past front of crash guard and be no wider than outside of frame rail where mounted.
9. No side or rear windows to be enclosed with anything, fully or partially.
10. All window openings must appear as per original dimensions.
11. Louvers allowed on hood and side panels only, forward of front firewall.
12. Body sides flat and solidly attached and must extend to bottom of frame rails.
13. Body must be minimum 4" off the ground everywhere including maximum 3" high and 3" wide body extensions. Front scoop metal must be minimum 3" off the ground
14. No air gaps on hood and trunk lid.
15. Body rake measured along body line and or side window opening with frame level. Maximum 6 degrees rake on body.
16. Rear end of body must follow contour of body until it ends. Rear end of body must extend down to meet rear of frame rails. Rear-end of body must be completely closed in with sheet metal. Rear deck filler panel must be 90 degrees to the frame rail and must be completely closed in from body to cross member and from body side panel. (no holes)
17. All body panels, including roof inserts, must be made of sheet metal and must be minimum 20gauge thickness.
18. All cars must be equipped with a metal hood, securely fastened. The hood must extend from outer edges of cowl and radiator and go far enough forward to cover the radiator.
19. Hood scoop must be made of metal; it can be full length of hood. Maximum 18" diameter air cleaner. Scoop cannot be any wider than 2" on either side of air cleaner, and can not be any higher than I" above air cleaner, measured at back. Scoop must be flat on top with no flaring to direct air over roof Hood scoop must not impair driver’s vision. (up to the discretion of tech)
20. A clear Lexan windshield is compulsory from top to bottom of windshield opening and full width of windshield opening in from of driver. Lexan must be at least 1/8" thick. No window tints allowed.
21. No mirrors allowed. Tach must be mounted below line of vision through back window. 22. All cars must have access to the trunk area. Trunk lid must open.
23. Dzus fasteners used on trunk lids and fully enclosed hoods must be “butterfly self-ejecting fasteners”. No screwdriver type fasteners. Rev. March 2007 CVM-TR-07 2

3. WEIGHT RULES
(a) Minimum weight of car and driver after any race shall not be less than 2300 lbs. Left side weight shall not exceed 57.5% of the total weigh with driver in car. No adding fuel before weighing.
(b) Ballast weight must be directly and securely attached to main frame rail or major cross member structure, not sub frame, (entirely above bottom of main frame rails-see diagram in back of book). All ballast must be inside of body panels. No lead shot or liquid type ballast permitted. All ballast weights must be painted white with the car number painted in red or black. Any car losing ballast on the track will be disqualified.

4. ROLL BARS, CRASH GUARDS AND SEAT
(a) Minimum roll cage requirements are as per attached drawings at the back of the technical rules section of this book.
(b) All bars in roll cage must be minimum 1 3/4" O.D. and must be .090"minimum wall thickness roll cage
tubing. Three left side door bars must be as per drawing Three left side horizontal door bars to be bowed outward. Plates in the left side door bars are highly recommended. Right side must have three door bars as per drawing in back of book. Drivers helmet must be below bottom of all roof bars.
(c) Because of manufactures thickness tolerances, there will be a 10% undersize allowance in frame and roll cage thickness specifications.
(d) " X " in between the frame rails must be made of 1.5" minimum (square or round) tubing, .090" wall
thickness. Minimum with tolerance.
(e) All 90-degree joints in main cage must have gussets. Triangular joints may be exempted at tech committee's discretion. Gussets must be minimum 1 1/2" X 0.090" thick.
(f) Electric welding only on frame and roll cage. No angle iron allowed in driver’s compartment.
(g) Crash guards are compulsory front and rear. Front crash guard must be mounted a minimum of 3"
ahead of front cross member to provide a crush zone. Must be constructed of pipe or tubing. No sharp comers or rough edges allowed.
(h) Crash guards must be flat across. No bowed crash guards. Top and bottom bars must extend the same distance from the cross member and must be parallel.
(i) Optional crash guard (NASCAR Modified type) allowed. All dimensions to remain as standard type.
No crash guards or nerf bars to be filled in with any typed of panels.
(j) Crash guards must be a minimum of 11" and a maximum of 14" from top to bottom. Center must be 14” to 16" from ground and must have at least one vertical bar.
(k) Rear crash guards may extend to 1/2 of rear tire width but must be at least width of chassis at rear
cross member. All rookie drivers must have at least one bar on rear crash guard painted bright yellow. No other cars to have yellow crash guards.
(l) Front crash guard to be no wider than chassis at front cross member. Exception on four spring cars,
crash guard may be as wide as outside of spring perch. Maximum distance from center of right kingpin to the front of the front crash guard must not be more than 32". Both front and rear crash guards must be tied in with steel, flat bar or tubing minimum 1" X 1/8", on tin straps or thin rods. Must
be fastened solid at each end.
(m) Nerf bars must not extend past outside edges of tires. Compulsory between front and rear wheels.
Nerf bars not allowed in front of front wheels.
(n) An aluminum racing seat (0.125” thickness) must be securely fastened to the cage or frame at bottom
and backrest. Seat must have a padded headrest. Seat must be mounted above 2" X 3" frame rail. Rev. March 2007 CVM-TR-07 3
(o) All bars in the driver’s area must be covered with fire retardant padding. If running door liner on left side, sheet padding is recommended. Center of steering wheel must be completely padded. Lexan steering wheel cone inserts recommended.

5. STEERING, BRAKES AND STARTER
(a) Any regular type steering box may be used but column must be mounted to the left of dash center.
No center steering boxes. No power steering. Rack and pinion is allowed. All steering parts must have 3" ground clearance. Welds on any steering parts must be properly reinforced.
(b) Dual brake system is required. Four-wheel brakes must be in good working order at all times. Any type brake system allowed. No power brakes.
(c) Cars must be equipped with self-starter in working condition.

6. SUSPENSIONS
(a) Maximum wheelbase is 118"
(b) Any car make can run Ford or Chev. suspension for 1 calendar year.
Ford – two transverse springs only
Chev. - four springs suspension only
(c) No auxiliary suspension of any kind allowed. (1/4 springs, coils etc. )
(d) No independent suspension.
(e) No on-board driver controlled suspension or weight adjustments allowed.
(f) Only one shock per wheel. Only steel welded bodied stocks allowed, and/or a dollar value as confirmed by the manufacturer to be determined by the tech committee.
(g) Load bolts and sway bars may be used.
(h) No slider components allowed.
(i) Adjustable spring shackles allowed. Load adjusting shackle brackets. To be approved by the Tech committee.
(j) All leaf springs will be made of steel. All springs will have standard eyes on both ends. Bolted eyes
acceptable on end of spring. (Quarter elliptic not allowed) Leaf springs must be mounted to O.A.R.C. tube frame cross members or optional cross tube only, not to the sub frames.
(k) Buggy spring style leafs must be mounted to cross member or optional second cross member.
(l) No bird cages of any type on rear axle housing. Solid mounts to leaf spring. (U-bolts or welded brackets).
(m) Front axles may be interchanged but must look like an original axle for the car in question. No twin
I-beams. After market axles allowed. Must be 54" ± ½” maximum kingpin-to-kingpin center with 4" drop. ½” tolerance on drop for adjustment Drop measured from top of kingpin boss to top of 2" O.D. tubing. Tubing for axles must be 2" O.D. with 3/16" or 0.188” wall minimum thickness. Seamless tube recommended. No square tube axles allowed.
(n) Spring pocket under driver’s seat is to be covered by 1/8" plate.
(o) Front springs to be mounted on top or bottom of axle in GM style four spring cars.
Rev. March 2007 CVM-TR-07 4

7. FUEL SYSTEMS AND FUEL
(a) Fuel cell compulsory. All cells must have an approved vent.
(b) Cell must be mounted behind rear firewall and inside perimeter of frame rails.
(c) Cell must be completely enclosed in a metal container and securely fastened. Safely and properly protected.
(d) The lowest part of cell must be above the lowest part of the frame rail where mounted or the lowest
part of the cell must be above the lowest part of the rear cross member when fuel cell is mounted behind rear axle.
(e) Filler spout on fuel cell must be center or left side of car and must have proper cap. Filler spout may
be fastened to body. If filler spout is attached to body it must have two flexible joints to allow for body movement.
(f) All fuel lines must run under the floor pan of car and be properly secured. Neoprene (synthetic rubber) gas lines are recommended. No copper lines.
(g) Only metal fuel filters allowed.
(h) Fuel will be determined as legal when the reading on the digitron meter is plus or minus “x” units of
measurement according to the average reading of all competition fuels tested at any given time to be determined by the tech committee.

8. CARBURATION, INTAKE AND EXHAUST
(a) Any Holley two-barrel carburetor allowed. Except part #0-80600 and part #0-80585 and part #080590.
All carbs. must have two throttle return springs. All cars must be equipped with an intake air filter or flame arrestor. No cutting or welding other than maintenance on intake manifold.
(b) Intakes:
1. Original equipment intakes allowed. No altering corners of intake, no cutting or welding on intakes other than for maintenance. Carb adapter must mount to original mounting surface and use original bolt holes of intake manifold for engine being used.
2. Clifford manifolds allowed. Outside cosmetic altering permitted, original part numbers must remain. Absolutely no welding or cutting permitted. No internal modifications permitted on manifold other than to cleaned up along the line where the two halves are joined ±¼ inch max tolerance. Anything else must be approved by tech before it is modified. The maximum diameter of the carb adapter is not to exceed 1.760 wide, 3.500 long, with a true circle radius at both ends and be at 90 degrees from the upper and lower face. No tapering of opening. Chevrolet # C-4501 Ford # F-4502 AMC 1987-90 # 4510 AMC 1990+ # 4520 Adapter #08-1013 (casting # A-0452)

(c) No supercharging or injecting devices allowed.
(d) No electric fuel pumps. No pumps with glass bowls.
(e) Exhaust System:
1. Left side pipes must extend past driver’s seat.
2. Top of any outlet must not be more than 18" from ground.
3. Mufflers mandatory. May run any muffler system equivalent to the magnaflow that
meets the decibel reading. May use 1 or 2 mufflers.
(f) Header Plate:
Header/intake plate may be used, maximum thickness 1/2"

Rev. March 2007 CVM-TR-07 5

9. IGNITION
(a) Battery must be securely fastened in engine or trunk compartment only. Battery cables must be properly secured.
(b) Any ignition system allowed except Magneto's.
(c) Ignition kill switch must be mounted in the center of dash and must be clearly marked. Off must be in
or down.
(d) No on-board driver adjustable electronic controls.

10. ENGINE
(a) Any type body type may run engine / transmission from Ford, GM or AMC, but must conform to the
rules for that combination. Must run same combination for one season. Ford engine may run transmission from GM or Ford.
(b) Only inline six cylinder overhead valve engines allowed. Cast iron blocks and heads only. Maximum displacement allowed is 256 cubic inches, including clearance and wear. Formula to determine cubic displacements: Bore X Bore X Stroke X 6 X 0.7854.

(c) Engine location: Maximum allowable distance for set back of engine is measure from center line of
king pins measured back to the number one spark plug and is 13". Maximum allowable distance down to the center of crankshaft from a line across the top of the frame at the crankshaft bolt is 5". Engine must mount within 2" of center frame to center of crankshaft nose from side rail to side rail. Engine must mount within 10 degrees of OEM position. Chrysler to be in OEM position.
(d) The only engines allowed are as listed below with their respective crank strokes.
Chev. 230 cu. in. 3.250" stroke Chev. 250 cu. in. 3.531" stroke
Ford 240 cu. in 3.180" stroke Ford 250 cu. in. 3.910" stroke
AMC 232 cu. in. 3.500" stroke AMC 243 cu. in. 3.410" stroke
Chry. 225 cu. in. 4.125" stroke

(e) Only production crankshafts for make and model of engine being used are allowed. No after market crankshafts at all, no custom forged or billot crankshafts. Only original stroke allowed as listed above, no stroke changes at all. All stroke dimensions must be + or - .015" tolerance.
(f) No oversized valves allowed. Stock valve head diameter for engine being used. Maximum sizes for engine allowed are as follows:
Chev. 194, 230 or 250 Intake 1.7187" Exhaust 1.500"
Ford 240 Intake 1.7812" Exhaust 1.565"
Ford 250 Intake 1.750" Exhaust 1.3906"
Chry. 225 Intake 1.625" Exhaust 1.359"
AMC 232 Intake 1.781" Exhaust 1.406"
AMC 243 Intake 1.911” Exhaust 1.500"

(f) An additional allowance of .005" is allowed to provide for manufacturers production tolerance.
(g) Any type pistons allowed.
(h) Any camshaft allowed except roller cam and roller lifters. No overhead cams. Stock diameter lifters
for make and model only. No mushroom lifters.
Lifter Diameters:
Chev. 194, 230 or 250 0.845”
Ford 240, 250, 300 0.875”
Chrysler 225 0.845”
AMC 232, 243 0.845”

(i) No oil coolers. No dry sump systems. No external drive oil pumps allowed. A remote oil filter is allowed. Approved pressurized serge tank is allowed (Moroso style) must be securely mounted. Rev. March 2007 CVM-TR-07 6

11. CLUTCH AND TRANSMISSION
(a) Commercial aftermarket steel blowout proof bell housing compulsory. Must be left as manufactured.
No cutting, except for right hand clutch fork, left side clutch fork hole must be covered also lower lip can be removed. No aluminum alloy bell housings.
(b) Stock flywheels allowed. Aluminum flywheels allowed. Automatic transmission flex plates allowed.
(c) Clutch must work and be foot operated. Multiple disc or aftermarket mini single disc clutch allowed. Minimum 7" disc size. No couplers.
(d) Three speed OEM transmission only. Any make in any car. Reverse must work. No automatic transmissions. No quick change transmissions, or transmissions with internal clutch. No overdrive units. No in and out boxes. No 4 or 5 speed transmissions allowed.

12. REAR END AND DRIVESHAFT
(a) Any make OEM rear end allowed in any car. Rear ends must be locked. No integral style rear ends
with internal axle locks allowed. No quick changes. No aftermarket center sections. No aluminum pots, aluminum center pieces or aluminum tubes. No OEM positraction units. No rear-ends with any type of unlocking or unloading devices. No electronic traction control devices allowed.
(b) All driveshafts must be constructed of steel. No constant velocity joints of any type. All driveshafts must be painted a bright color or white.
(c) All cars must be equipped with a full 360-degree driveshaft loop front and rear. Loops must be made
of 3/16" by 1-1/2" plate or equivalent. The front loop will be 3" to 6" behind front u-joint. The rear loop will be 3" to 8" before the rear u-joint.

13. TIRES AND WHEELS
(a) All cars must use 5 lug wheels only.
(b) All four wheels must be approved commercially manufactured steel wheels. No OEM wheels. No uni-lug wheels.
(c) Minimum offset to wheel center from inner edge of wheel is 2"
(d) Maximum width for all wheels is 8"
(e) Commercially sectioned wheels allowed.
(f) Tires must be used as per tender specifications approved by the membership. Tire softener allowed.
All tires must be within a durometer reading as determined by Tech.

14. COOLING SYSTEM
(a) Any type radiator may be used providing it is not higher than hood or wider than frame. Hood must completely cover top of rad.
(b) Radiator must be fastened at front of car. No auxiliary cooling cores.
(c) No antifreeze in cooling system.
(d) Cars must have a catch or over flow can of not less than 2 liter capacity and this should be drained
prior to each race. Can must be located forward of front firewall and cannot be vented anywhere behind front firewall. It is mandatory that you run a hose to the front windshield from the catch can. Rev. March 2007 CVM-TR-07 7

15. MANDATORY SAFETY EQUIPMENT
(a) Driver must have a helmet that is no less than 2000 Snell Foundation approved. Helmets will be inspected and must have sticker. It is recommended that driver’s record blood type and RH factor plus any major medical allergies to adhesive type label on inside of helmet. It is also recommended that drivers remove dentures while competing.
(b) Three inch wide made-for-racing seat belts with double shoulder harnesses must be used. They must have a quick release and must be fastened to structural members with grade 8 bolts and locknuts. Crotch strap recommended. No belts will be older than 5 years.
-In 2007 all belts will be dated Oct. 2002 or newer
-In 2008 all belts will be dated Oct. 2003 or newer
- In 2009 all belts will be dated Oct. 2004 or newer.
(c) S.F. I. approved (Sema Foundation Inc.) P.B.I. or Nomex designed-for-racing fir suits are mandatory.
No Proband fire suits. Suits must be in good shape and clean. Fireproof underwear, socks, racing boots/shoes are recommended. Racing gloves are mandatory.
(d) Fire extinguishers are mandatory. Minimum 2-1/2 lbs. must be mounted safely. Must have a gauge.
Must be within drivers reach. Halon onboard systems accepted. If extinguisher gauge is empty or reads out of green zone, car will not be permitted to run.
(e) Drivers window nets are recommended. Must hook at top and release at front.
(f) Recommended - Helmet restraint such as Hans Device or Hutchens Device
(g) Some kind of mandatory head support in the car for safety. Must have any one or all of the following: a neck collar, head rest on the seat, or Hutchins type of device.
(h) One-way Radios:
1. One-way radios are mandatory. The model specified for use by the C.V.M. is the “RACEceiver 1600”.
2. One-way radios are considered to be part of safety equipment, cars cannot race without one.
3. Any car/ driver found to with his/her one-way radio on a channel other than the one designated by the CVM will result in a disqualification for the night.
4. Further rules/procedures will be established for use of the one-way radio.
16. Any thing not specifically covered in these rules is not considered legal. Anything that was considered legal in the past is superseded by this book. Any interpretation and intent of these rules will be ruled upon by the Head of Tech., the Race Director and the Technical Committee.

17. TECHNICAL NOTE:
The tech committee does not rule on the safety of the cars, just that they comply with our rule book, as voted on by the members.

Rev. March 2007 CVM-TR-07 8

ENTIRE FRAME MUST BE 2” X 3” X .100” WALL THICKNESS
There will be a 10% undersize allowance for frame and roll cages

FRAME REQUIEMENTS
Rev. March 2007 CVM-TR-07 9

CANADIAN VINTAGE MODIFIEDS
TECHNICAL RULES 2007 - 2009

ROLL CAGE REQUIREMENTS
Rev. March 2007 CVM-TR-07 10

CANADIAN VINTAGE MODIFIEDS

NOTES
Rev. March 2007 CVM-TR-07 11