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Stock Car Racing 

Mod Rules




Saskatchewan Racing League Inc.

Modified Tour

2009 Rules Revised Sept. 30, 2008

The Saskatchewan Racing League Inc. shall hereafter be referred to as the SRL throughout the rules descriptions.

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. No expressed or implied warranty of safety shall result from publications of or compliance with these rules and/or regulations. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official. The race director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. No expressed or implied warranty of safety shall result from such alteration of specifications. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.

All cars that pass a safety inspection will be allowed to participate. Tour cars expecting to compete in the entire tour and will be fully eligible for championship points and money must be fully compliant with the rules of the tour. Casual cars may be entered for competition, usually at their home track, and are not likely to be eligible for post-season awards. These cars may not fully comply with the tour rules but must be in compliance with the rules of their home track.


 Licensing Fees/Requirements

Licenses and numbers will be approved by the SRL. Drivers with limited, or no experience will be required to begin all events at the rear of the starting field, for at least one full season. All Drivers must have an SRL Mod Tour license, and all cars must be registered, before participating in any event.

Licensing fees will be used to pay SRL officials. Fees include one full season.

Driver license                              $20.00

Transferable crew membership             $20.00 (maximum of 5 memberships per car)

Car registration                           $100.00 (payable $20.00 per event)

Raceiver rental                            $20.00 per event (plus a $50 refundable deposit)

All drivers/crewmembers must present a SRL Mod Tour license or membership when registering for an event. All registered SRL mod Tour drivers and crewmembers showing a valid license/membership, will be exempt from any other entry fees at any SRL Mod Tour events. If a current license/membership is not available when registering, the driver and/or crewmember(s) will have to pay an entry fee. A replacement license may be purchased for a fee of $10.


1.SAFETY EQUIPMENT: Driver Safety is of utmost importance to this series and we recommend that you purchase the best quality safety equipment that you can afford. SAFETY RULES MAY BE AMMENDED BY THE SRL ONGOING, AS NEEDED. Rules apply at all times car is on track. Snell-rated SA2000 or SA2005 helmet required. Roll bar padding required in driver compartment (Fire retardant recommended). SFI-approved full fire suit required. Fire retardant gloves and shoes required. A fire retardant neck brace must be worn if a head and neck restraint is not. Driver-side window net required, minimum 16"x20" ribbon or mesh style, and must be mounted so latch is at top front of window. Minimum SFI 16.1 rated three-inch wide five point safety belt assembly required (Y-type shoulder harness not allowed), sub belt may be 2”, must be mounted securely to roll cage, recommended to be no more than three years old. The SRL may ask that safety belts be replaced after a major accident.  Kill switch required within easy reach of driver, near center of the car so it is accessible from either side of Car by Safety Crew, and must be clearly marked ‘OFF’ and ‘ON’. A minimum five pound fire extinguisher must be in every teams pit area. Recommended: Fire retardant head sock and underwear, collapsible steering shaft, head and neck restraints. SFI 38.1 Head & Neck Restraint is highly recommended & may be mandated by the SRL.
2. FRAME: All teams must use the same chassis at both dirt and paved track events. The only allowable reason for a team to use more than one chassis in a season is unrepairable damage. OEM complete, 1964 or newer, perimeter American rear-wheel drive passenger car frame only. No sports car frames. Frame must be full and complete, cannot be widened or narrowed, and must be able to support roll cage on both sides, exceptions are: weight jack in original center line of spring tower allowed; frame may be shortened or cut a maximum 36 inches forward from center of rear end housing; horns may be removed in front of steering box; front crossmember may be notched and boxed for radiator and/or steering clearance; maximum seven inch wide opening in side of spring tower for spring removal. Maximum two inch wide by four inch tall frame stiffener may be welded directly to outside of left side frame rail. Minimum wheelbase 108 inches, maximum 112 inches, both sides. Maximum overall width (front or rear) shall not exceed 78 inches from outside of tire to outside of tire. For cars using OEM rear suspension design, rear of frame, from a point no further forward than differential tube centerline, may be replaced with minimum two inch by two inch steel tubing with .095 inch wall thickness. No part of frame can be lower than five inches from ground except front crossmember.
3. ROLL CAGE: Must consist of continuous hoops, minimum 1.66 inch O.D. tubing, with a minimum wall thickness of.095 inch for main cage, frame-mounted in at least six places, low carbon or mild steel recommended. Must consist of a configuration of front, rear and top hoops connected by tubing on 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 one cross bar in top halo. Foot protection bar required. Main cage no further forward than rear of engine. All bars forward of cage must be lower than hood.
4. DOOR BARS: All driver side door bars and uprights must be minimum 1.5 inch O.D. and .083 inch wall thickness. Minimum three driver side door bars, parallel to ground and perpendicular to driver, and welded to front and rear of roll cage. Door bars must have 2 rows of vertical uprights welded between them, continuing down to the frame. Passenger side must have at least one cross door bar, horizontal or angled, minimum 1.25 inch O.D. and .083 inch wall thickness, and one top door bar, minimum 1.5 inch O.D. and .083 inch wall thickness. Steel door plate, 18 gauge or .049 inch minimum thickness, must be securely welded to outside of driver side door bars and cover area from top door bar to bottom door bar and from rear hoop down-post to five inches in front of seat. Must be visible for inspection.
5. BODY: Must be same width, front to rear, and parallel to OEM frame. Engine compartment must remain open (no side panels). Hood must be enclosed at rear. No panel in front of right door to engine compartment. No inner panels. No car covers. Must have front windshield 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 highest point at bottom of window, whether interior or body. May use Lexan in opera windows. May use full windshield. No wings or spoilers. No reflective doors or quarter panels. We ask that every car owner present the best appearing car possible.
6. DRIVER COMPARTMENT: Must have minimum three windshield bars in front of driver. Lexan or aluminum cowl panel in front of driver can be no wider than cockpit and no farther back than steering wheel. Minimum .125 inch aluminum, or .060 inch steel, complete floor pan required. Aluminum racing type, high-back seat only and must be bolted in, using minimum three, 0.375-inch bolts, next to left side frame rail and ahead of rear tires.
Head & Shoulder Supports Highly recommended. Bottom of seat can be no lower than bottom of frame rail. Driver must be sealed off from track, driveline, engine, fuel cell, cannisters and pumps. Oil coolers must not protrude above interior. Accumulators cannot be mounted between driver and left-side door bars. No driver-adjustable devices allowed while car is in competition except brake adjuster. Mirrors are mandatory, and must give the driver a clear view out the rear of the car. A left side rear view mirror, mounted on the pillar bar, is recommended. All drivers must have and are responsible for having an operational raceiver, tuned to the SRL frequency, any time they are on track during an event. Teams may purchase their own, or rent the raceiver from the SRL.
7. FRONT SUSPENSION: All components must be steel, unaltered OEM, in OEM location, and replaceable by OEM parts, exceptions are: tube-type upper A-frames with or without aluminum or steel cross shaft, and mounts can be moved; OEM replacement stamped steel lower A-frames; rubber, nylon or steel lower A-frame bushings, no offset or bearing type; welded or bolted shock mount on lower A-frame. Lower A-frame mounts and bolt holes on frame must be in OEM location. OEM ball joints only, control arm may be altered for larger ball joint. Sway bar must be unaltered OEM.
8. STEERING: No rack and pinion. All components must be steel, unaltered OEM, in OEM location, exceptions are: outer tie rod end and adjustment sleeve may be replaced by a minimum .625 inch steel rod end and steel tube; steering arm on spindle may be modified; spindles can be ground for brake caliper clearance only; unaltered, OEM replacement Pinto spindles may be used; bolt on spindle savers allowed; steel steering shafts and knuckles only; steering quickener, steering wheel and quick release may be aluminum; cockpit steering may be modified, must be kept on left side. Spindles must be right and left, and of same design. Idler arm, pitman arm, and center link must match frame.
9. SHOCKS: One steel, nonadjustable, unaltered shock per wheel only. No air, or remote reservoir shocks. No Schrader valves or gas refill ports. Front half of any shock may be shielded.
10. SPRINGS: One steel coil or multi-leaf (rear) spring per wheel only. Minimum 4.5 inches O.D., non-progressive coils only. No torsion bars or air bags.
11. REAR SUSPENSION: Three options: Aftermarket three link design, multi-leaf spring design or OEM design. All components must be steel. All mounts and brackets must be welded or bolted solid. 1.) Aftermarket three link design requirements: Must use minimum 16 inch long, measured center to center of mounting bolts, solid tube lower trailing arms, mounted with no more than 10 degrees angle from level. Must use one upper trailing arm, solid tube only, located at top center of rear end housing. Must use minimum 19 inch panhard bar, measured center to center of mounting bolts. NO spring or rubber loaded links are allowed, steel or rubber bushing rod ends may be used, OEM links may be used in a three link configuration. Springs may be mounted on shocks. Any car using an aftermarket three link design must have an additional 100 pounds added to chassis minimum weight. 2.) Multi-leaf spring design requirements: Must use steel multi-leaf springs with no additional suspension components besides one shock per wheel. Leaf spring and shock mounts must be welded, or bolted solid to the axle tube. Shackles may be adjustable, leaf spring sliders may be used. Adjustable aluminum lowering blocks allowed. 3.) OEM stock design requirements: Rear crossmember, control arm mounts and bolt holes on frame must be in stock location. All components must be unaltered, approved OEM, and match frame. Differential mounts may be fabricated or altered. Control arms cannot be altered in any way, except upper(s) may be redrilled for pinion angle. Steel, rubber or nylon control arm bushings only. Springs must remain in stock location. Lower spring perch must be welded to rear-end housing. Must use steel upper weight jack.
12. REAR END: Any steel approved OEM passenger car or truck non-cambered rear end (housing and carrier) allowed. Aftermarket steel spools are allowed. All components must be steel, except lowering blocks, axle cap, and drive flange. Safety hubs (floater) allowed. No quick change devices. Solid steel axles and one piece drive flanges only.
13. BUMPERS: Steel bumpers must be on front and rear at all times and welded, or mounted with minimum .375 inch bolts. Must be minimum 1.25 inch O.D. tubing, .065 wall thickness on front - .095 wall thickness on rear. Two-bar front bumper must be mounted frame-end to frame-end, no wider than width of material outside frame horns and with bottom loop parallel to ground. Top bar must be directly above bottom bar, minimum 6.5 inches apart, measured center to center.
14. TIRES/WHEELS: A DOT approved and legal all season radial tire must be used. Maximum tread width will be 275, with 60, 65, and 70 series profiles allowed. Minimum tread wear of any tire is 400. No softening or altering of tires in any way. Maximum 8-inch wide steel wheels allowed. Must use minimum one-inch O.D. lug nuts.

15. BRAKES: Must be steel approved OEM, operative four wheel, drum or disc. Must maintain minimum OEM dimensions for hubs/rotors and calipers, cannot be lightened. Bolt pattern may be changed. Larger studs recomended. Rear rotors may be aftermarket, minimum .810 inch thickness. Vented rotors only, no scalloped rotors. One proportioning device allowed for adjusting

front to rear only. Brake lines must be visible and must connect directly from master cylinder to calipers with no devices in between, unless an inline proportioning valve is used in the rear line. Rear caliper brackets must be welded or bolted solid to rear-end axle tube, NO floating caliper brackets.
16. EXHAUST: Round tube headers only. All primary header tubes must enter directly into one collector, at same point, at end of header. Non-stepped, painted headers only. No heat wrap on headers. Schoenfeld mufflers stamped IMCA 609, or IMCA twister mufflers, must be used. All exhaust must go through mufflers, two per car, one per header. No exhaust sensors, cross-overs or balance tubes.
17. FUEL SYSTEM: Racing fuel cell required, maximum 32 gallon capacity (15 gallon recommended), must be in minimum 20 gauge steel container. Cell must be securely mounted behind rear axle, between rear tires, minimum four inches ahead of bumper, minimum ten inches above ground. Must mount with minimum two solid steel straps around entire cell, two inches wide and .125 inch thick. All cell mounts must be steel, securely welded to frame/cage. Protective tubing must cover rear and extend past both sides of cell. No part of cell shall be lower than protective tubing. Fuel cell vents, including cap vent, must have check valves. Pick-up must be on top or right side of cell. Limit of one fuel filter. No cool cans. Mechanical OEM type push rod fuel pumps only. Must use an unaltered Holley 4412, 500cfm Carburetor, or an OEM 2 barrel carburetor, with a maximum venturi size of 1 3/8”. Adapter thickness must be maximum 1.25” including gaskets. No top flow air cleaner housings. Maximum air cleaner element size will be 14” x 4”.
18. FUEL: Gasoline only.
19. WEIGHT: Minimum weight limit of 2,500 pounds, no tolerance, after race with driver in car. Weights must not be used in driver compartment or outside body. All weights must be securely mounted with at least 2 .5-inch bolts, painted white with car number on it. Penalty for weight infractions will be a loss of 1 point for every 10 pounds below minimum. No titanium, magnesium, stainless steel or carbon fiber components. Solid steel fasteners only.
20. BATTERY/STARTER: One 12 volt battery only, must be securely mounted between frame rails, and positive terminal must be covered. Starter must bolt on block in OEM location and directly engage flexplate/flywheel. Car must have capability of starting without being pushed or pulled. Car must leave initial staging area on demand, unaided, or go to rear of that race.
21. GAUGES/ELECTRONICS: 12 volt ignition system only. All wiring must be visible for inspection. Only gauges allowed are analog oil pressure, fuel pressure, brake bias, water temperature and analog tachometer (memory recall allowed). No electronic traction control devices.
Distributor must be OEM type. Must use OEM or aftermarket direct replacement parts. HEI distributors are allowed on Ford and Dodge engines. An OEM firing order must be maintained.
22. TRANSMISSION/DRIVE SHAFT: All forward and reverse gears must be operational, plus a neutral position. With engine running and car in still position, driver must be able to engage car in gear and move forward, then backward. Only OEM production transmissions, with oem gear ratio’s allowed. No extensively modified transmissions, ‘in and out’ boxes, or quick change devices allowed. Functioning shift levers must be in OEM location. One steel OEM type flywheel or steel OEM type flexplate allowed, must be bolted directly to end of crankshaft.

Automatic: Must be unaltered, two or three speed, OEM production case with a functioning OEM appearing pump. Aluminum OEM bellhousing may be replaced with aftermarket explosion-proof aluminum bellhousing. Original OEM bellhousing must have approved scattershield constructed of minimum .125 inch by three-inch steel, 270 degrees around flexplate. Only external lines allowed are for transmission cooler. Ten inch minimum, operational, torque converter only.
Manual: Must be unaltered, three or four speed, OEM production case and have a working OEM style flywheel, with a minimum 10 inch disc, and OEM appearing pressure plate. The flywheel and clutch assembly must maintain a minimum weight of 35#. These components must rotate, consistent with engine rpm, while car is in any gear. Must use minimum 270 degree explosion-proof steel bellhousing, or a 270 degree ” x 4” scatter shield with an OEM bellhousing, around top of clutch and flywheel area. Hydraulic clutch pedal allowed with manual transmission only.
Drive Shaft: Minimum two-inch diameter, white, steel drive shaft. Steel slip-yokes only. 360-degree drive shaft loop required and must be constructed of minimum .25 inch by two inch steel, or one inch tubing, mounted six inches back from front U-joint.

23. ENGINE COMPARTMENT: Rear of engine (bellhousing flange) must be mounted at least 72 inches forward from centerline of rear axle. Engine offset must be kept within two inches of centerline of front crossmember. Minimum 12-inch engine height from ground to center of crankshaft with engine level. OEM type cast iron water pumps only with V-belt aluminum or steel pulleys only. Fan must drive off the front of the water pump. Copper/brass or aluminum radiator only and must be mounted in front of engine.
Open Engine

a) OEM, readily available, unaltered parts only. Marine parts not permitted. Maximum 372 cubic inch displacement, including overbore.

b) Cylinder block must be unaltered OEM production v-8. The only allowable alterations are, alterations to aid oil drainback to pan, boring/honing cylinders, boring/honing main journals, and milling deck surface for flatness.

c) OEM or aftermarket crankshafts are allowed. Crankshaft must be OEM dimensions for the block being used and weigh within 3% of the OEM crankshaft. (examples of OEM weights GM 350 – 51lbs, Dodge 360 – 56lbs, Ford 351w – 53lbs). Harmonic balancer MUST be OEM style.

d) OEM or aftermarket connecting rods are allowed. Connecting rods must be OEM size and weigh within 5% of the OEM connecting rod for the cylinder block being used. Rods may be deburred/polished.

e) Pistons must be dished or flattop maximum, weighing a minimum of 490 grams each less the wristpin. All pistons MUST have two compression rings and an oil ring.

f) Oiling system must be OEM type. A high volume pump, and any wet sump steel oil pan is allowed. Windage tray may be used. Oil filter MUST mount directly to block in stock location.

g) Camshaft: OEM cam configuration must be maintained. Flat tappet cam and lifters only. No roller lifters allowed. Lifter valley tray is allowed. Aftermarket push rods and rocker arms allowed but must be OEM style. Rocker arms must be OEM ratio for block being used. No roller rockers or roller tip rockers. NO gear or belt cam drive systems allowed. Only OEM style timing chains and covers allowed.

h) Cylinder Heads: Only stock cast iron OEM castings permitted. Absolutely no deburring, grinding or polishing of intake or exhaust ports permitted. OEM type steel valves and retainers must be used. Maximum valve spring diameter for GM is 1.27”. Maximum 3/8” diameter Screw in studs and guide plates are permitted. No stud girdles are allowed. Composition gaskets of no less than .039” compressed thickness MUST be used on all cylinder heads. Chevrolet Vortec, and Dodge Magnum heads are not allowed. Valve covers may be aftermarket.

i) Any readily available, unaltered, production cast-iron Intake manifold will be allowed. Factory performance intakes such as the Z-28 hi-rise, Bowtie, or marine intake will not be allowed. No aluminium intake manifolds.


Allowable exceptions and penalties

a. Chevrolet Vortec and Dodge Magnum heads may be used with an additional 100 pounds added to the chassis. They must retain an OEM valve size, chamber size, and cannot be altered in any other way than listed in section 24. h), above.

b. An aftermarket, stock replacement cast iron head, may be used with an additional 100 pounds added to the chassis. The heads must maintain an OEM chamber size for the engine being used, and use an OEM valve size.

c. Any cast iron performance or aluminium intake may be used with an additional 50 pounds added to the chassis.

Crate engine

GM crate engine part # 88958602 GMR 350/350 is allowed with no penalty.

GM crate engine part # 88958604 is allowed with a 150# penalty

Ford crate engine part # M-6007-D347SR is allowed with a 150# penalty

Dodge crate engine part # P5007958 is allowed with a 150# penalty

Stanton Dodge crate engine part # ASALMS 75360 is allowed with a 150# penalty

The crate engine cannot be altered in any way, and may be tore down to verify legality in any manner the open engine is.


25. Every effort will be made by the SRL to develop & maintain a safe, affordable Modified Racing Series with the focus on creating an equal playing field, therefore emphasizing driver skill  & car set up.


SRL mod tour race procedures


All cars entering an event will receive five points for each heat entered. Points will be awarded based on feature race finish, starting at one-hundred points for first place, counting down by two points for each position. All cars will be awarded points for their finishing position in the feature race, even if all scheduled laps are not completed. If the feature has to be stopped at any point, and cannot be restarted, it will be considered the official finish of the feature race, and will be scored as such.

All heat races will be 10 laps. The cars will be divided into two heats when 10 or more cars are entered. Heat one staging will be done by a pre race random draw, done 1 hour prior to the scheduled race time, at the SRL mod tour drivers meeting. Any drivers not present at this time will align at the rear of heat one. Heat two staging will be staged from the results of heat one, with the winner in the pole position. The feature race will be a minimum of 20 laps if less than 10 cars are entered, up to 50 laps if more than 10 cars are entered. The feature race will be staged from the results of heat two, with the winner in the pole position. If the cars have been divided into two heats, heat A will be the inside row, and heat B will be the outside row.

After 5 events the points will be awarded based on position. Entering the two day championship event points will be awarded as follows, first place will be awarded five-hundred points, second place will be four-hundred ninety five points, third will be four-hundred ninety, fourth four hundred eighty five, and fifth back will all receive four-hundred eighty points. During the event the race procedure and points will be awarded as previously outlined, with the exception that the first heat will be aligned by earned season points, with the high point cars furthest forward.


If you have any questions about the interpretation of these rules please contact:

SRL Director of Race Operations:             Devon Brown                    phone                 306-377-4810 or 306-831-8074

                                                                        Box 1851                           

                                                                        Rosetown, SK             SOL2VO