MOSPORT SPEEDWAY SPORTSMAN 2009
Note to Larry: No .060 overbore allowed, sorry bud- Body style – Any North American built fiberglass, aluminum or steel car.
- Body appearance – must be stock appearing. No carbon fiber body parts
permitted. No wedge style, slab side or high performance bodies or DIRT
noses allowed.
- Wheels must not extend outside body or scrub rails.
- Frame height minimum 5” excluding the front cross member but
including ballast weight (without driver).
- Body height will be a minimum of 46 inches, measured 10" behind the
top of windshield on the roof centerline (without driver).
- Crush panels, minimum 0.040” aluminum, can be used to separate the
body panels and the windshield from the interior.
- The trunk deck lid must be hinged or easily removable for easy access in
case of fire.
- Battery - One 12 volt battery only and it must be anchored securely and
separated from the driver’s compartment by a firewall.
- Brakes - Four wheel hydraulic brakes in good working condition are
compulsory.
- Four-wheel disc brakes are allowed.
- A dual master cylinder with a balance bar is allowed.
- No aluminum calipers. Steel single piston calipers must be used. Rotors
must be a minimum ¾” thick. Caliper mounts must be constructed of
Steel only.
- Bumpers must be stock appearing and must be mounted in stock
position with no sharp edges exposed. After market nose and tail cones
are allowed. A fabricated bumper reinforcement may be used but
a stock bumper or cover must be installed over the top.
- Body, engine and chassis are interchangeable.
- The wheelbase will be a minimum of 105" on a full frame chassis and the
frame rails can be altered to meet this measurement. Wheelbase
must be within 1 inch from one side to the other side. (I.E. 105"
minimum, 106" maximum) of the car at all times. A maximum of 64"
of track width is allowed.
-2-
- Fabricated rear clips are allowed. No underslung cars.
- A factory production stock front clip may be used from the firewall
forward. Factory front clips must extend from in front of the
steering box rearward to the main rail. Frame may be built out of 2" x
3" or 2" x 4" tubing, minimum .095" wall thickness.
- Where the main frame rail ends, forward may be built out of smaller
material if desired to accommodate mounting of the front bumper.
This will be referred to as the bumper crush tube.
- A stock steering box is mandatory and aftermarket center link,
aluminum tie rod sleeves, and Heim joint tie rod ends may be used.
- Main frame rails must be no less than 24" outside of rail to center line of
chassis.
- Chassis from front firewall rearward may be fabricated from no less than
10" circumference by .095" box tubing.
- Front coil springs, strut rods, and sway bars may be interchanged,
provided they fit original mounting and are not altered from stock
appearance and position. Sway bar must be mounted to lower
control arm and may be adjustable. Front sway bar must be
no larger than 1 1/4” outside diameter.
- A maximum of 4 load bolts may be used.
- Hubs may be drilled for larger wheel studs with minimum 5/8" wheel
studs being mandatory.
- No coil over suspensions or coil over eliminators allowed. A Minimum 4"
O.D. coil spring is allowed and spring rubbers may be used.
- Spindles must be stock passenger car and of one piece construction. No
cutting or welding of spindles. Reaming of spindle holes will be allowed to
accept bigger ball joints and tie rod ends. Howe spindles and parts are
not allowed. Rotors and hubs must be one piece. E.g. (Stock GM
hub and rotor.)
- Steering arms may be altered to fit steering linkage.
- Any steel front upper control arm may be used. Sliders allowed.
- Stock O.E.M. lower control arms must remain in stock mounting location.
Left lower control arm can be altered in length to assure positive
camber. Measurement from grease nipple to mounting hole
in frame must be within l inch of factory specifications at all times.
Ball joint can be realigned to eliminate binds.
-3-
- One shock per wheel. Must be PRO WB only. No split valve shocks
- DRIVE LINE: STEEL DRIVE SHAFTS ONLY - Must have steel 360 degree
retaining loops ¼” by 2" positioned at the front and rear of the drive shaft
within 6" of each u-joint. Drive shaft must be painted white or
fluorescent.
- V8 engines only or sealed crate engine part #88958602 permitted.
- Make of engines are GM, Chrysler, and Ford.
- Chrysler and Ford engines will be dealt with on a one to one bases.
- Engine - Block Assembly – Only engines that were factory available for
the make, model and year being run are permitted. No
modifications to engine block, cylinder head, crankshaft, and
camshaft or connecting rods unless specified.
- Maximum c.i. GM – 350 plus .040 for clean-up
Ford – 351 c.i. plus .040 for clean-up
Dodge – 360 c.i. plus .040 for clean-up
- Block may be zero decked. No part of the piston can protrude above
back deck.
- Pistons – OEM cast or forged pistons allowed No high performance
pistons.
- Camshaft – OEM style Hydraulic cams and valve lifters only. Double
roller timing chains are allowed.
- Maximum Valve Lift: GM 410
44Ford 8
Dodge 412
- Intake – stock or 2101 Edelbrock. (New style only and unpainted)
- Carburetion – 1 stock quadrajet or one r4412 – 500 C.F.M. Holley factory
stock produced two-barrel carburetor only. The only changes allowed
are jets, power valve and removal of choke parts. Two throttle return
springs and stop are mandatory. Carburetor hats are allowed and
air cleaners are mandatory. An accelerator toe bar is mandatory.
Air filters boxes are permitted. No boost venture below the
throttle plate. No ram air systems. A quick change jet kit (part
#3425 float bowl) may be used. No Keith Dorton performance carburetors.
Where metering block is attached to main body, a small amount of
resurfacing is allowed. Choke accessories may be removed. Adaptor
plates are allowed for 4412 carb only. Maximum spacer thickness is 1
¼” including gaskets.
- Holley factory stock measurements are as follows:
* Metering block must have the following ID# stamped on it. Factory
stock #5924 or #5925. The #10570 will appear on replacement or
service metering blocks.
-4-
* Metering block power valve channel restriction ports (2 holes behind
the power valve) maximum .0635".
* Metering block idle feed restriction ports (2 holes) maximum: .035".
* Metering block main passage to discharge nozzle (2 holes) maximum:
.141".
* Main body high speed air bleeds (2 holes) maximum: .028".
* Main body idle speed air bleeds (2 holes) maximum: .074".
* Butterfly (throttle plate) thickness: .0398" - .0438".
* Hole in butterfly: .090" - .096".
* Butterfly must have stamped on it ID #215.
* Throttle shaft diameter .368" - .369".
* Throttle shaft thickness at flat of shaft: .152".
* Venturi bore diameter: 1.373" - 1.377".
* Boost venturi inner bore diameter .377" - .383".
* Boost venturi outer diameter .610" - .630".
* Throttle bore diameter 1.6855" - 1.6865".
* All air entering the engine for combustion purposes must enter
through the air horn of the carb.
- Compression rule – Maximum compression ratio of 9:1 and must not
whistle
above 9.4:1 if checked hot.
- Cylinder heads – must be stock for engine being used with no
modifications.
NO DOUBLE BUMP TYPE HEADS. No 2.02 or vortec V8 heads are
permitted.
- Valves – Cylinder heads may be changed from year to year provided
they are
not high performance. Stock ratio rocker arms only. Screw in studs
and guide plates are allowed.
- Valve size: GM Max. 1.94 intake and 1.60 exhaust
Cleveland Max. 2.04 intake and 1.65 exhaust
Windsor Max. 1.84 intake and 1.64 exhaust
Chrysler Max. .188 intake and 1.60 exhaust
- Valves – Valve stem diameter must be stock. Stainless steel or stock
type valves are allowed. No turning of valve stems permitted.
Undercut and light weight valves are not permitted. Dodge may use
adjustable rockers.
- Engine location – must be located so as the front most spark plug is no
further back than the center of the upper ball joint with zero tolerance.
- Minimum engine height of 12” from center of crankshaft to ground level.
- Exhaust manifolds – log type or small ram horn with maximum 2-1/4”
outlet.
- No polishing or matching of ports, manifolds must bolt to head without
spacers.
-5-
- Exhaust system - The maximum O.D. of the exhaust tubing is 3”.
- Pipes must be firmly mounted and exit ahead of the rear tire. Pipes are
to be cut flush to the body and above the frame rail or turned down
at the exhaust end and exit under the car. Any muffler may be used
but is mandatory at Mosport.
- Cross over is allowed in the exhaust system.
- Fuel pump - Mechanical pump only.
- Fuel – Maximum 103 octane.
- Distributor and ignition - Battery operated 12 volt ignitions only.
- Car must be self-starting and have an ignition kill switch within reach
of the driver on the left hand side of the car.
- OEM electronic ignition may be used and require stock type coil and
stock type ignition modules. No MSD type boxes allowed.
- No traction control devices are allowed.
- Starter must be in stock position and functional.
- Fire walls - Interior: all flammable materials must be removed.
- Front firewall does not have to be original, but must use a minimum 22
gauge steel. Passenger side of firewall may be moved as far back as
the front of the roll cage, to allow for easy access to the drive line,
and may be .040" aluminum.
- All sheet metal work must be neat and properly fitted. All holes are to
be covered with sheet metal either welded or riveted.
- Floor must be complete and have all holes covered with sheet metal.
- Fire control - Cars must have a 2 ½ lbs minimum fire extinguisher with
a steel or aluminum head mounted in a steel mounting bracket and
must be bolted down and within driver’s reach with seat belts
fastened. Fire extinguisher must be serviced and inspected each
year and dated no earlier than January 1st of the current year.
- Driver’s fire suit is mandatory. No coveralls. Driver and suit must
maintain a clean looking appearance. Fireproof gloves, contoured
neck collar, balaclava, underwear, socks, shoes and Hans or Hutchins
type devices are highly recommended. No nylon shoes
allowed.
- Fuel cell - A fuel cell is mandatory.
-6-
- The fuel cell must be mounted between the frame rails (no notching of
the rails allowed) and the bottom must be mounted with no less than
9" ground clearance. Fuel cell must be secured with steel
1" 1/8" straps made of x or equivalent, not less than two
lengthwise and two crosswise, full 360 degrees.
- Fuel cell must have left side, right side and rear hoop protection bars,
minimum 1 3/4 x .095" tubing.
- Fuel cell must have a one way check valve in the vent line and have a
shut-off valve installed in the fuel line which is accessible to the
driver and the safety crew and it must be clearly marked OFF and
ON.
- The gas cap must have an appropriate attaching line to prevent its loss.
A ground strap from the tank to the chassis is mandatory.
- Steel fuel lines must be used and neoprene can be used for connection
purposes only. Fuel lines must be securely fastened under the floor. No
copper lines are allowed. Metal fuel filters only.
- Oil line to oil pressure gauge must be braided, copper or steel line.
No plastic lines.
- Instruments - Oil pressure and heat gauges mandatory.
- Paint and lettering - All cars must be neatly painted. Numbers
assigned by the track must be painted on both sides of the car
and roof, with a minimum 20" high by 3" wide letters (roof numbers
read from right side) of a color offering a distinct contrast to
the color of the car. No trick numbers. 4" numbers on both
headlight and tail light caps are required. Block type
numbers 6" high, white in color, must be displayed on the upper right hand
side of the windshield.
- Radiators - Must be in stock location and include an overflow can
securely mounted ahead of engine firewall and under the hood.
No antifreeze. No remote rads.
- Rear end and suspension - Any three or four point hook up may be
used. Lower arms must not exceed 30" from mounting holes on
rear end of mounting holes of frame. Upper arms must not exceed 30".
Rubber biscuits allowed at one end of trailing arms. Panhard bar
must be a one-piece solid type. Heim joints are allowed.
- Rear ends to be welded, mini spool or full spool only. No aluminum or
titanium parts excluding the spool and the differential housing (3rd
member).
- Rear ends are interchangeable. (i.e.: Ford to Chev.)
-7-
- Floaters with steel or aluminum hubs recommended.
- Rear ends must remain in stock position.
- No ratchet rear ends. No traction assist or control devices allowed.
- No cambered rear ends allowed.
- Final gear ratio cannot be greater than 5:1.
- Roll bars - Cage must be constructed of 1 ¾ inch round steel tubing
by .095” wall thickness.
- Four point cage compulsory.
- Base of uprights must be electric or mig welded to the frame of the car.
- The roll cage must be braced to the rear frame kick-ups and diagonally
between the rear uprights.
- A transfer bar between the rear diagonal and the front frame optional.
- A minimum of four horizontal bars must be inside the left side door and
three bars inside the right door and a minimum of two vertical bars
between each horizontal bar. Minimum 40” length by 14" high, 16
gauge metal between door bars and body skin on driver’s side is
recommended on all cars.
- A center overhead bar running fore and aft between transverse
members is recommended.
- No pipe fittings allowed.
- All roll bars in the driver’s area must be properly padded and taped
with foam rubber.
- Left leg protection bar must be installed between roll cage and left
front frame rail. All welds will be subject to the approval of the tech
inspectors.
- Safety belts and harness - A quick release lap belt of no less than 3-
inch width and 3-inch shoulder harness is mandatory. Belts must be
securely fastened to frame and/or roll cage with minimum ½ inch
grade 5 bolts or equivalent. A crotch belt is mandatory and seat
belts must be dated within the last 3 years or be in excellent
condition. Padded steering wheel hubs are mandatory and no one
piece steering columns will be allowed.
- Safety helmet -A Snell 2000 SA or newer approved racing safety helmet
is mandatory and complete driver’s fire suit must be worn in all
practice and race events. Goggles and a full face helmet are highly
recommended.
-8-
- Seat - An aluminum racing seat must be securely bolted to the roll
cage and not bolted to the floor. When mounting the seat, use
minimum 3/8" bolts with large flat washers to hold the racing seat to
seat framework. A minimum of two bolts on the seat back and two
bolts on the seat bottom are required. The seat must be positioned
completely to the left of the centerline of the car. An approved
head restraint must be made of an energy absorbing material and
headrest side plates are recommended.
- TIRES - All entries are required to use a brand of tire that is approved
by the track management.
- Automatic transmissions must be used and remain stock as produced
and a transmission cooler is highly recommended. The torque
converter must be a minimum diameter of 11".
- Racing rims only - Maximum wheel width allowed is 8 inches with a
minimum weight of 17 lbs. No aluminum, magnesium, wide 5 bolt
pattern wheels. Wheel spacers are allowed.
- Windshields must be safety glass with 4 safety clips or lexan. No
plexiglass allowed.
- Window net is mandatory with minimum 3/8 inch rod and it must have
a quick release latch.
- Window pillars must be approximately stock width and in stock
location.
- Front windshield center bracing mandatory. A minimum of two secure
braces must be on the inside of the car. No exterior bracing, front or
back.
- No added film spray tinting permitted. Minimum side window openings
22" length x 14 ½” high.
- No obstruction of driver’s view, in or out of race car, with the exception
of the top 4" of the front windshield for sponsor decal. No letters or
numbers on rear window.
- MIRRORS - One rear view permitted.
- Radios - No radios unless track authorized one-way.
- All new Mosport crate motors must be sealed by Mosport Tech before
delivery to the driver or owner.
- Crate motors - not sealed by Mosport Officials are subject to further
inspection by Tech. Any motor found to be questionable will be dyno’d
and evaluated for its legality.
-9-
Percentages – with driver in car - 53% left side weight
- 45% rear weight
Classification - First Generation – Thunder Cards
- Second Generation – Camero Clip or Cars using a car clip only
Weights - 1st Generation – Built Motor – 3100 lbs.
- Crate Motor – 3150 lbs.
- 2nd Generation – Crate or built motor – 3200 lbs.
Thanks and we hope
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