2015 THUNDER CAR RULES
The rules and/or specifications set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. By making application for a competitor permit, it is deemed that the competitor agrees to become familiar with these regulations and abide by the directions set forth and prescribed by Management. No express or implied warranty of safety shall result from publications of, or compliance with these rules and/or specifications. They are intended as a guide for conduct of the sport and are in no way a guarantee against injury or death to participants, spectators or others.
THE INTERPRETATION OF THESE RULES WILL BE SOLELY THE JUDGMENT OF THE
TRACK OFFICIALS & TECH STAFF IN CHARGE AND THEIR DECISION WILL BE FINAL
The Street Stock division is open to any approved make of North American built chassis having a factory listed wheel base of 108” or more for the make, model and year being raced IE: Metric 108”, Chevelle 112” etc. Longer chassis's may be shortened to 108" wheelbase. No convertibles, four-wheel drive vehicles, trucks or station wagons will be allowed. No modifications to chassis pick up points are allowed, with the exception of replacing rear frame rails from just past the rear end ,rearward.
Any part of the car not specifically mentioned or covered in these rules must remain STOCK. Stock parts are those found in the OEM PARTS BOOK (original equipment manufacturer), not those found in high performance or off-road racing books.
Any cars being teched will be allowed to have only one driver and two mechanics present in the tech area – no one else will be allowed. Any harassment from any driver and/or crew member to the tech staff (or any other track official) may result in an automatic disqualification, thus forfeiting all points earned that night and all money earned at that race meet.
The word stock when used herein, shall mean unaltered, as factory available and produced by the OEM for the make, model and year of the car being raced. That excludes all aftermarket “High Performance” parts, and all decisions and rulings shall be based on data obtained from the Canadian Service Data Book and other OEM Specification Book.
BODY AND APPEARANCE
Body must be stock in appearance to the original vehicle but does not have to match the chassis used.
Fiberglass bodies are allowed as per manufacturers below:
Ultimate Custom Fiberglass, AR Bodies model (#xyg metric), AR Bodies (Next Generation Sportsman), Performance Fiberglass (NCaTS bodies), Five Star (S2 Sportsman).
Note: No mix and match between steel and composite bodies except where specified within these rules.
Regardless of body style MUST have a stock roof skin in keeping with the body material used, and B pillars all the way to quarter panels of the make and model body being declared. The “A” pillars (windshield posts) may be fabricated as long as they have a close resemblance to factory pieces. B pillars may be reshaped to resemble a 2 door car if a 4 door roof is used.
Fenders and doors may be fabricated using a minimum of 22 gauge standard sheet metal (No aluminum or alloys). Must look completely original and must meet approval of tech if fabricated. Body must be complete with all doors, fenders, quarter panels, hood, trunk and roof as well as both bumpers. All chrome moldings, door handles, nameplates and lights must be removed. All doors must be welded or bolted shut to the satisfaction of the tech inspector.
Aftermarket hood steel, aluminum, or fiberglass may be used if available for body used.
Inner splash aprons in the front fenders must be removed. Headlamps and tail lamps must be replaced with sheet metal filler.
Absolutely no bars shall extend outside of body panel including the grille and bumper, with the exception of side scrub rails. Scrub rails cannot extend any further forward than rear of front wheel opening, and no further rearward than front of rear wheel opening. (No sharp edges.) Maximum 1” x2” welded or bolted to the roll cage. Mounts must be within 6” of front and rear of scrub rail . Carriage bolts only on scrub rails. Must be mounted on or above front and rear wheel center line. If bolts are countersunk, maximum hole size is 1”.
Cars must not be excessively rusty and must be presentable in appearance. Body and appearance will be strictly enforced and scrutinized by track officials at all times. The Tech Official will reject cars that are considered unsafe or improperly prepared.
Minimum roof height of 50", measured 6" back from windshield in the center of roof. Skirts and nose must have minimum 4" ground clearance.
Bumpers must match body width. Approved racing plastic bumper covers allowed. No external reinforcing is permitted. Bumpers must be mounted in stock position with no sharp edges exposed. No cut-offs. Bumper shocks may be welded. Chrome steel type bumpers must be welded and chained, to prevent bumpers from falling off onto the race surface and creating a hazardous condition during a race meet.
All upholstery materials, trim and padding must be removed. The front and rear firewalls must have all holes and openings filled with sheet metal. NO SHEET METALS SCREWS TO BE USED. Pop rivets or welding/brazing only.
Full tin kit may be used. All material must be steel and a minimum of 22 gauge.
For transmission and exhaust clearance passenger side floor pan may be raised a maximum of 12” above frame rails. Passenger side of firewall may be moved as far back as front of roll cage. Minimum 22 gauge steel.
Rear firewall – a metal firewall min. 22 gauge steel must be fitted over the rear seat back brace area and the top shelf behind the driver’s seat to completely close off the trunk compartment.
All sheet metal work must be neat and properly fitted. All holes are to be covered with sheet metal, either welded or riveted.
Trunk floor may be removed from rear firewall back. . The trunk lid must have a quick release hold down.
Seat and seat belts must be firmly mounted to the cage or the chassis of the car. Not to the floor boards (See Safety Equipment for installation)
No fuel or brake lines or fuel filters permitted in the driver’s compartment.
All windows and glass except for front windshield must be removed. No screens or half windshields. Windshields may be Lexan or safety glass with a minimum of 4 safety clips. (No Plexiglas allowed.) When using Lexan, two windshield center braces are mandatory. Windows to be clear of tint. Only factory tinted windshield glass permitted. No obstruction of the drivers view on the front or rear windshield area except for the top 4’ of the front windshield for a sponsor decal.
Interior mirrors are permitted.
ROLL CAGE (MANDATORY)
Minimum roll cage requirements.
Cage must be 1 3/4” minimum outside diameter with .095” wall thickness (minimum).
Base of uprights must be electric welded to frame of car.
4 door bars on drivers side and plated with a minimum of .065” plate between all door bars to frame rails.
Unibody cars must have sub frame connectors. Minimum 2”x3”. .095” square tubing for roll cage to be mounted on.
In a Unibody car, the rear upright bars must be connected by a side to side member just above floor pan.
Cage shall be braced to the rear frame kick-ups and diagonally between the rear uprights.
Full roll cage mandatory from firewall back to rear frame rails. Rear and front hoops allowed.
All welds must be properly gusseted with no less than .095” thick. No pipe fittings allowed.
All roll bars in the driver’s area must be properly padded and taped.
Left leg protection MUST be installed between roll cage and left front frame rail. ALL WELDS WILL BE SUBJECT TO THE APPROVAL OF THE TECH INSPECTOR
Only those cars who are entered as registered members of the Barrie Speedway Street Stock Division are permitted to pre-number their car. Numbers of members must be on the roof reading from the passenger side and in the center of each door, in large (minimum 24”) letters in a colour that clearly contrasts the paint job on the car. Sponsor’s names and logos may be placed on any other place on the car. NO FOIL NUMBERS – NO SILVER OR GOLD NUMBERS. Block type numbers 5” high, white in colour, must be displayed on the upper right hand side of the windshield to make it easier for line up purposes. Vulgar words and expressions are not permitted.
Car weights are 55% maximum left side and 50% maximum rear. All ballast weight must be mounted safely and securely, no lower than frame rails. If ballast weight is mounted behind rear end, it cannot be mounted lower than the bottom of, and/or rearward of, the fuel cell. All weight must be labeled with car number and painted white. Added weight must be in block form in no less than five-pound blocks. Cars will be weighed and teched after racing as they come off the racetrack with the driver in car without topping up fuel. No Substitutions.
Minimum weights: 3050 lbs. Rear disc brakes add 25 LBS. Composite (Fiberglass) bodies add 50 lbs.
Minimum weight 3050lbs.
* Automatic transmission 40 lbs. weight break (Grandfathered for existing Barrie Speedway Cars Only)
* Dual Master add 25 lbs.
* Composite Body add 50 lbs.
* NCATS Body add 25 lbs.
* Rear Disc Brakes add 25 lbs.
Min Wts 3050 (with standard transmission)
Dual Master add 25 lbs.
Composite Body add 50 lbs.
Rear Disc Brake add 25 lbs.
= 3150 lbs.
With Automatic Transmission
= 3110 lbs.
Hydraulic flat tappet lifters and cams only. Any lift may be used. Stock diameter lifter only.
There will be no head modification. Camshaft and cylinder heads will be strictly enforced. Chev: minimum 70cc combustion chamber. ENGINE MUST BE STOCK! Maximum overbore of .060” allowed. Any GM model car may run a 350 CID engine (small journal rods are not allowed.), Chrysler a 360 CID engine, and Ford a 351 CID engine maximum. Wet sump oil pans only. (Circle Track type recommended) Must be steel only. Must fit in stock location with no modification of chassis. Inspection plug recommended. Aluminum racing radiators are permitted. Must fit in stock location. Any aftermarket V belt pulley is allowed. Any aftermarket “I” beam connecting rods that weights the same or more than stock, and the same length as stock ( eg. GM must use 5.7 rods) may be used. Aluminum water pumps are allowed for all manufacturers. 1.600" exhaust valves are allowed for Chevrolet's. Balancing of crankshafts is allowed.
Pistons Any flat top, dish, or reverse dome piston may be used with a minimum of 2 eyebrow valve reliefs. No dome pistons. Full floating wrist pins are allowed.
INTAKE MANIFOLDS Aluminum Edelbrock performer series intakes are optional. Chev part #2101 (first design not allowed.) Ford# 2750 or 2181 and Chrysler part #2176,
Stock cast iron 2 barrel intakes with a maximum intake top bore size 1.825”.
Crate engine option
General Motors Part # 88958602 and 19258602 only
1) Engines are available to be purchased through Barrie Speedway with Barrie Speedway seals. All other sources for crate engines are subject to tear down’s like any other engine with or without GM seals.
2) All engine repairs/rebuilds to be performed by company and/or individual specified and approved by Barrie Speedway. Pick up and delivery of engine is the owner's responsibility.
3) Engine must be resealed by a Barrie Speedway Official before it is released from approved and specified supplier or rebuilder - $150 fee.
4) Any repairs completed by other than the approved supplier will be subject to re-inspection by supplier and resealing by BSW officials.
These engines must retain factory sealed bolts and/ or Barrie Speedway sealed bolts. Used engines may be purchased provided they originated from the above sources.
All components provided with the new engine must be used without modification. With the exception of installation of an approved harmonic balancer and timing chain. After market distributor cap, module and rotor allowed.
Balancer may be replaced with a 6 ¾” minimum, stock type elastomer.
As per GM crate engine spec’s maximum compression ratio is 9:1
ENGINE MOUNTS/ LOCATION
O.E.M. or solid steel allowed.
Engines may be lowered from stock and may be moved back to the #1 cylinder and lined up with the upper ball joint. Exhaust manifolds, frame rails, and cross member may NOT be modified from stock when lowering engine. A tie down strap or chain from the left side of the engine to the frame rail is highly recommended. Minimum crank height is 12”. Ford and Chrysler must use stock crank height.
All built engines can have the option of being sealed $150 fee plus travelling expenses.( if outside of Barrie area)
Crate engines can only be inspected and sealed at approved crate engine rebuilder.
One, two-barrel, Holley 500 CFM #4412 carburetor. The only changes allowed are jets, power valve, squirters and removal of choke parts. It is highly suggested that you have your carburetor inspected before use .
Carb Spacers: any aluminum or composite carb spacer may be used, providing the TOTAL thickness does not exceed 1 ¼ inches, including gaskets.
All carbs to be sealed to spacer, spacer to be sealed to intake, idle will be set to 1000 rpm and engine MUST stall when choke horn is covered. Two throttle return springs running into different directions are mandatory. Throttle stops mandatory. Accelerator toe bar recommended.
Cars must have air cleaners to act as a flame arrestor (max. 4” x 15”). Must fit under the hood. A cold air box is permitted. No Ram tubes or ducting allowed that supplies air to carburator. Air boxes are allowed maximum 20” wide
- Stock OEM or World Products cast iron straight plug only. No after-market cylinder heads.
- No porting, polishing and/or relieving under valves.
- No angle milling.
- No special lightened valves. No titanium valves.
- No angle plug heads.
- No head with cast number 292.
- No Chev bow tie heads. No GM Vortex heads.
- The maximum valve sizes as measured across the face of the valves are as follows:
- GM Intake – 1.94 Exhaust – 1.50
- Ford (Cleveland) Intake – 2.04 Exhaust – 1.65
- Ford (Windsor) Intake – 1.84 Exhaust – 1.64
- Chrysler Corp. Intake – 1.88 Exhaust – 1.60
- GM minimum 70cc after surfacing.
- Ford part number M6049L302-GT40 64cc after surfacing
- Chrysler minimum 64cc after surfacing. No W2 cylinder heads.
- Valve springs must fit into stock cylinder head spring seat. (No barrel springs)
- No “Bee hive” springs. Stock diameter valve springs only ex. Chev 1.25” diameter
- Rockers must be stock for engine.
- Screw in stud and guide plates allowed.
-Minimum of piston to cylinder head deck height .038” including gasket. (Chrysler 360 must add an additional .020”)
- World Products cylinder head allowed is part #043600 A or B casting #I-052.
No other aluminum intakes or headers permitted. No aftermarket high performance ignition systems permitted. Aftermarket but stock style such as Accel coil & module allowed. No roller rocker arms are permitted. No special external oil pumps or dry sump systems permitted. No electric fuel pumps.
Electric fans are optional.
Any automatic or manual stock OEM transmission without alteration. All gears must be operational.
Dodge and Ford may use Chevrolet transmissions.
Automatic transmissions: No racing automatics. No special torque converters. Must have stock torque converter for transmission being run. Minimum 12" converter. Two-speed power glides are allowed in any make and model. No aluminum manual transmissions allowed.
CLUTCH, FLYWHEEL AND BELL HOUSING
Stock steel OEM clutch and flywheel units must not be drilled or machined. Must be as factory issued with no modification whatsoever. Only nodular-iron or steel flywheels allowed,
minimum weight 14lbs. Must have an NHRA steel bell housing. Sema 6-1 flywheel shield or
scatter shield of 1/4” steel. Must be mounted over the clutch and flywheel 360 degrees between
the bell housing and the floor. No scatter shield inside the car permitted.
Full diameter solid disk clutch allowed.
At your own option, bell housing should have an inspection plate for easy inspection of clutch. If there is no inspection plate on the bell housing, you may be required to remove the transmission for clutch inspection.
Pressure plate must be a minimum of 11 lbs & 10 1/2” in diameter. Cannot be machined to get to 11Lbs.
Driveshaft must have two 360” steel retaining loops minimum 1/4” x 2” positioned at the front and rear of driveshaft within 8” of the U-joint. No chains. Steel drive shafts only. Drive shaft’s must be painted white or fluorescent. No accessories may be driven off or attached to driveline.
Stock rear end with drum brakes or Ford 9” rear end with drum brakes allowed. Stock style axles only. Must have stock geometry suspension mounting points for chassis being used. Full steel spools allowed. Must be full diameter. Also steel mini spools allowed. Floater rear ends are allowed. Rear disc brakes optional, but must add 25 LBS penalty. Gun drilled axles allowed.
NO posi, lockers of any type or Gold Trac differentials allowed!
- Rear upper and lower control arms may be fabricated from steel. Stock length and mounts allowed.
No adjustable rear arm mounts allowed.
No modification of stock suspension locating points allowed. All Uni-body cars must install sub frame connectors. Frame height must be a minimum of 6” and will be measured without the driver. After-market steel housed racing shocks will be allowed. (Koni, Pro and QA1). No bump stops allowed. Upper rear mounts and upper or lower front mounts may be extended straight up or down to accommodate ride height. Racing type springs allowed on front and rear of car. Must be minimum 5” diameter. Front load bolts permitted. Rear load bolts allowed.
- Front load bolts permitted
- Any stock GM spindle allowed on GM chassis. Must be used in pairs and symmetrical. Maximum rotor thickness 1 ¼”.
- Tubular upper control arms are allowed
- One piece adjustable sway bar allowed
- Top and bottom Dodge screw in ball joints allowed
- Tie rod adjuster sleeves may be after market steel or aluminum with lock nuts. No rod ends in tie rod assembly.
- Centerlink, Pitman and idler arms must be stock OEM parts but do not have to match year, make and model of chassis but must match the make. Eg. GM to GM, Ford to Ford etc.
- One front lower control arm may be modified in length within 1” of stock position. Other control arm must remain stock.
The Street Stock division is open to any approved make of North American built chassis having a factory listed wheel base of 108” or more for the make, model and year being raced.
Full size chassis may be shortened to no less than 108”.
Full “X” may be installed between frame rails.
Rear frame rails may be replaced from rear end back with 2”x3”x.095” square tubing solidly welded. All stock mounts must remain unaltered.
- Single piston stock calipers only
- Brake proportioning value allowed
- Dual master cylinders allowed with balance bar placement location optional. Must be same size front and rear.
- Steel braided brake lines allowed
- Braking system must be operational on all four wheels.
Exhaust pipes must exit to the outside of the car to the rear of the driver and ahead of the rear wheels. Exhaust pipes should be firmly mounted and have no sharp edges or protrude outside of the bodyline. Maximum exhaust not to exceed 3” outside diameter.
Original cast iron exhaust manifolds allowed. No ram horn manifolds allowed. Exhaust manifolds may be inverted. If using stock manifolds, they must remain stock as produced.
Spec headers are allowed as listed below:
Schoenfeld- # 185, #185CM, #165, #165A, #165ACM, 135, 135h or 145. (Dodge #445) (Ford #335)
Dynatech- # 01-21900, # 01-21910, #01-20900, # 01-20910
Add 25lbs when using headers.
No e-vac systems allowed.
No "H", "X" or merge pipes allowed when using headers
FUEL CELL AND FUEL SYSTEM
The fuel cell must be separated from the driver’s compartment by an all metal firewall, and must be 20 gauge. There can be no openings in the firewall and any holes must be filled in with metal. No filler neck or fuel line is permitted inside of the driver’s compartment. Minimum of two steel square tubing or flat bar front to back and side to side. The fuel cell may be lowered in the trunk area. The bottom of the fuel cell may not be lower than center of the rear end tubes. The fuel cell must be centered between the frame rails. Plastic fuel cells must be placed in a metal container, minimum 20-gauge steel. There must be a minimum 1” gap between the fuel cell and steel enclosure to act as a crush area. A fuel cell rear protection hoop must be used. Minimum 1 3/4” x .095” tubing
No external electric fuel pumps. All filler caps must be non-vented. No car will be permitted to run if any sign of fuel leakage is found. Ground strap from filler neck to chassis is mandatory! Fuel cell must be mounted securely. One protection bar must be run horizontally above the fuel filler neck. Minimum 1 3/4” round tubing x .095” or 2” square tubing x .095”.
No reverse or aluminum type rims permitted. STEEL ONLY! Maximum rim width bead to bead – 8”. Heavy duty or racing rims may be run on all four wheels. Heavy duty 5/8” wheel studs and nuts mandatory. Wheels stud threads must protrude through nuts. Racing wheels mandatory Rim weight must be a minimum of 17 lbs. Tires and rims must not extend outside the body.
To be determined by Barrie Speedway.
TRANSPONDERS are mandatory. 163” minimum from the centre of nose. Mounted so LED lights point down towards track surface.
One way radio or scanner is mandatory to take direction from tower. 2 way optional radios are optional. Radios available from Race 2 Way communications.
- Center of steering hub must be heavily padded.
- All roll bars in driver’s area MUST be properly padded and taped.
- Composite bodies must have a window net attached to the roll cage above the driver’s head (with hose clamps not zip ties.)
BELT AND HARNESS
A quick release belt of not less than 3” in width and a 3” shoulder harness is compulsory. Belts must be securely fastened to the frame and/or roll cage ( not to floor), straight in the direction of line of pull, with grade 8 bolts of a Minimum diameter of 3/8”. Crotch V-belt or 5 point belt is mandatory.
Aluminum racing seats only, headrest mandatory. Wrap around headrests on each side is recommended.
• Seats must be bolted to the frame and/or roll cage, NOT the floor.
• Seat must be positioned to the left of the centerline of the car.
• Use minimum 3/8” grade 8 bolts with large washers to hold racing seat to seat framework.
Cars must have a current year approved fire extinguisher mounted in an approved steel mounting bracket bolted down and within driver’s reach with seat belt fastened.
An approved racing type safety helmet must be worn at all times during all races and practices and until car is parked in pit area. Helmets must be Snell 2010 SA or newer. Goggles or full face helmet is highly recommended.
DRIVER’S WINDOW NET
Proper driver’s window net is mandatory with minimum 3/8” rod. Must have top release.
DRIVER’S FIRE SUIT
Driver’s fire suit is mandatory. Driver’s fire suit must be SFI rated. No coveralls allowed. Driver and suit must maintain clean looking appearance with no rips or tears. Fireproof gloves, neck brace, balaclava, underwear, socks and shoes are highly recommended.
Must be securely mounted in a spill proof container with a steel frame behind driver. One 12 volt battery only. MUST HAVE 2 (TWO) IGNITION KILL SWITCHES MOUNTED ON BOTH SIDES OF DASHBOARD. BATTERY DISCONNECT SWITCH IS MANDATORY AND MUST BE ACCESSIBLE TO SAFETY CREW
*All cars are to be inspected prior to their first evening of racing.
All cars running in a feature event are subject to technical inspection by random selection at the end of the race. Any car running illegal non-stock parts will be disqualified. No car will be permitted to compete in an unsafe mechanical condition.
YEAR END DISBURSEMENTS AND AWARDS
End of year payouts and point funds will only be paid to registered drivers that have taken part and competed in a minimum of 51% of the NWAAS season.
All specifications and regulations contained herein are subject to immediate change – without prior notice – as determined by the Director of Operations.