2020 Thunder Stock Rules
2020 CAN-AM SPEEDWAY THUNDER STOCK RULES
The Thunder Stock class at Can-Am is designed to be an entry level division. OEM/STOCK as possible. The
rules are structured to be as safe and as close to OEM. Any and all rules may be changed or adjusted at
any time to keep the class SAFE and COMPETITIVE. Track officials reserve the right to enforce a
competitive weight adjustment based off and competitors performance. If it not covered in the
following rules it does not make something legal, we are not operating in grey areas. Please contact
officials and ask if you have something in question.
CAR ELIGIBILITY: Any foreign or domestic naturally aspirated 4 cylinder engine type car allowed. No
trucks or convertibles. Front or rear wheel drive allowed, no 4 wheel drive vehicles allowed. No turbo
charged, supercharged or rotary powered cars allowed. All drivers are REQUIRED to carry a Chilton Auto
Repair Manual with them at all times for the year and make car being used.
BODY: Body must remain OEM stock for year model being used. No fiberglass roofs or spoilers allowed.
All glass and plastic must be completely removed. All airbags must be removed. No sunroofs allowed,
opening must be covered with a minimum of 20 gauge sheet metal, securely fastened to the roof. No
enclosing of drivers compartment. All VIN #'s must remain in stock location and be easily readable. All
hoods required to have a minimum of (4) hood pins to safely secure the hood in place and allow for easy
INTERIOR: Floor pans must remain stock front to back and side to side. All holes must be completely
sealed. Rear firewall must completely seal off the drivers compartment from the fuel cell/tank and
WINDSHIELD AND REAR WINDOW AREAS: Windshield area must be completely covered with heavy
gauge mesh screen and must supported by a minimum of (2) 1"x1/8" pieces of steel located behind the
mesh and welded from the roof to the dash, evenly spaced. No mirrors of any kind allowed.
BUMPERS AND RUB RAILS: All cars must have stock front and rear bumpers in place when the nights
racing begins and remain in place unless damaged by an accident. A single rub rail will be allowed on
each side, between the wheel wells only, maximum 1" in size with no sharp edges. Cannot stick out
further than 2â€? from body. Safety chains must be installed in the front and rear of the car for towing
purposes. When OEM replacement bumpers arenâ€™t available, fabricated bumpers are ok at the tracks
discretion. The goal is to mimic what once was. This doesnâ€™t open the door for aftermarket performance
enhancing noses. If you have a question regarding your cars bumpers being legal please contact the
ROLL CAGE & CHASSIS: Roll cage mandatory and must be of 6-point design, made of 1.5"x.095"
thickness minimum. Drivers head must not protrude above the top of the roll cage with helmet on and
belted in the seat. Must have a minimum of (3) horizontal bars welded in the drivers side door area
from the front hoop to back hoop, minimum 1.5"x.095" thickness. Horizontal bars must be connected
with a minimum of (4) rows of vertical bars evenly spaced of the same size. Passenger side door area
must have a minimum of (2) horizontal bars between the front and rear hoops. The top bar must be in
line with the bottom edge of the door window. No kinked or heat bent pipes allowed. All main
connections must have suitable gussets in place. A steel plate, 1/8" thick must be welded to the drivers
side door bars. All roll cages must have 1/4"x5" square plates under the (4) corners of the main cage.
Plates must be securely welded and bolted to the floor. Front and rear hoops must be welded to the
plates. Stock frames only, must be straight and free of rust. No welding, cutting, chopping or lowering
of frames allowed. Frames may be reinforced for safety purposes only.
ENGINE: All engines must remain stock and stock appearing as manufactured. All replacement parts
must be original or OEM replacement. All parts must match the block being used, all numbers must
remain on the block for verification. All sensors must remain in OEM location and be in operating
condition at all times. Wiring harness must remain stock, repairs will be allowed as long as original
design is maintained. Exhaust must exit behind the driver, mufflers mandatory 2.5" maximum diameter
in and out. No performance mufflers allowed. Basic low cost header will be allowed as determined by
officials. CAM must retain OEM numbers and markings. If ground off or not legible will result in full
disqualification of points/monies and 2 weeks suspension.
COMPUTER: All computers must be original OEM for the year, make and model car being used.
Computer must be fully operational at all times. Computers are allowed to be reflashed. CARBURETOR:
Stock OEM fuel and components only, must be for the size engine being used.
COOLING SYSTEM: Radiator must remain stock and in stock location.
BATTERY: 1(one)Battery must be mounted in the trunk area or under the hood and be mounted in a
marine type box with cover, securely mounted to the chassis. A master switch is mandatory and must
be clearly labeled ON/OFF. Master switch must be mounted within the driver's reach and must be wired
to kill all power when turned off, including electric fuel pump.
POWER TRAIN: Stock OEM transmissions only. Transmission swaps are allowed as long as it is a direct
bolt-in replacement for year and model being used. No fabricating of mounts allowed. Driveshafts and
C.V. joints must be painted white. Rear wheel drive cars must have a minimum of (2) safety loops
around driveshaft. No Lightening of OEM stock flywheels allowed. Must be OEM weight as per Chilton
manual. No Alum or after market racing flywheels.
SUSPENSION: No spring modifications allowed, no cutting, welding or heating of springs allowed. No
progressive rate springs allowed. Maximum 5 degrees of camber, Suspension and components must
remain stock or OEM replacement. All suspension pivot points must remain in stock location and stock
track width. All shocks must be OEM for year, make and model being used, no performance struts
allowed, no coil-overs allowed
BRAKES: All four brakes must work at all times, no brake shut-offs, no brake bias adjusters allowed.
STEERING: Steering must be stock OEM and remain in stock location for make and model car being used.
Quick release steering wheel recommended. Steering wheel and wheel center must be padded.
SEAT: Aluminum high back racing seats are mandatory with a right side padded head support. Seat
must be securely fastened with a minimum of (4) 3/8" bolts in the bottom of the seat and a minimum of
(2) 3/8"" bolts in the seat back. All bolts must be grade 8 minimum and have fender washers on all
bolts. No fiberglass seats. SEAT BELTS AND PADDING: A minimum 5-point, 3" harness is mandatory,
must be free from cuts, tears, frays or holes. Belts must be (5) years old or newer and be SFI approved.
All roll cage bars within reach of the driver while buckled in the seat must be padded.
WEIGHT: Minimum weight is one pound per c.c., 4 Cylinders Honda V-tech (2450 lbs with driver).
Competitive Weight adjustment: track officials reserve the right to institute a competitive weight
penalty, with weight added to a location to be determined by track officials. All cars must have a
minimum weight and cubic centimeters lettered on the hood. Ballast weights must be lead or steel
plated mounted to the frame by weight ballast clamp. NO welding weight to frame allowed. NO
dumbbells may be used. All ballast weight must be painted white and have car number on it. All bolt on
weight must be securely fastened to the chassis and must remain inside the body of the car. Maximum
weight per piece is 25#. All weight must be painted white and have the cars number printed on it.
FUEL SYSTEM: 8 gal. fuel cell maximum and must be securely fastened inside the trunk area. Fuel cells
must be enclosed in 20 gauge steel or .060 aluminum container with a minimum of (2) 1"x1/8" steel
straps mounting it to the chassis. All fuel cells must a check valve or flap. Stock tanks for the car being
used will be allowed, tank must remain in the stock location under the car, extra straps are highly
recommended. All fuel lines running through the car must run through steel piping from firewall to
firewall and be completely sealed off from the trunk and engine compartments. Fuel lines not running
through the car must be steel braided or heavy duty fuel line securely fastened. 87-93 octane Pump gas
only, no race gas, no aviation fuel or additives allowed.
TIRES & Wheels: DOT tires only. The only tires sizes allowed are 165 to 235, 50/55/60/70 or 75 series.
Minimum tread wear rating is 260 or higher and must be visible. NO snow tires, no racing tires, no
grooving, no cutting or siping of tires. Grinding is allowed. WHEELS: OEM steel wheels only, maximum
width 8" with minimum 3" offset. No aluminum wheels allowed. Standard weight racing wheels will be
permitted and are highly recommended. No spacers of any kind. Same size wheels must be used on
each individual side. All lug nuts must be 1", 13"/14" or 15" wheels only.
DRIVER SAFETY: SFI-approved neck collar and full firesuit mandatory and must be in good condition,
free of holes, tears and excessive oil/grease. SFI approved racing shoes and gloves mandatory. Full face
Snell approved helmets only. Snell SA 2010 or newer helmets only. Sharp and/or protruding edges in
and around the cockpit will not be permitted. WINDOW NET: An SFI-approved window net is mandatory
and must be securely fastened in the drivers window. All nets must have a quick release latch accessible
from both the inside and outside of the car
SCORING TRANSPONDERS & RADIOS: Scoring transponders are mandatory, AMBx2 or AMB TranX260
transponders only. Transponder mounting location in rear of car between fuel cell and axle. They are
Mandatory. Transponder rentals are available. Raceceiver one way radios are mandatory, frequency is
454.000. No other radios or communication permitted.
PENALTIES, FINE, CLAIMERS & PROTEST: It is expected our racers will conduct themselves in a
professional manner at all times during any event and/or when representing the Can Am Speedway.
All fines may be collected from prize money on the day of the infraction. If the competitor has
not won appropriate money, the fine must be paid in full before the car and/or driver participates in
another event. Any participant that attempts to and/or does physically abuse any event official or
competitor, including pushing, punching, etc., will be subject penalty and/or disqualification and/or fine
and/or suspension and/or legal action and/or any other action deemed appropriate Can Am Speedway
Officials. Any participant who fails to stop for and/or allow post-race inspection will be subject to
penalty and/or disqualification deemed appropriate by Can Am Speedway Officials. Any participant that
attempts to drive roughly and/or hits another competitor unnecessarily will be subject to penalty and/or
disqualification and/or fine and/or suspension and/or legal action and/or any other action deemed
appropriate by Can Am Speedway Officials. Any participant that goes into another competitorâ€™s pit area
and/or to another competitorâ€™s car and becomes involved in any type of altercation will be subject to
penalty and/or disqualification and/or fine and/or suspension and/or legal action and/or any other
action deemed appropriate Can Am Speedway Officials. Any driver that exits the race vehicle on the race
surface without permission under a controlled period will be subject to penalty and/or disqualification
and/or fine and/or suspension and/or legal action and/or any other action deemed appropriate by Can
Am Speedway Officials. Any participant who ignores a flag or official signal will be subject to penalty
and/or disqualification and/or fine and/or suspension and/or legal action and/or any other action
deemed appropriate by Can Am Speedway Officials. Any participant that violates any technical rule as
presented within the rulebook and/or issued in a written bulletin will be subject to penalty and/or
disqualification and/or fine and/or suspension and/or legal action and/or any other action deemed
appropriate by Can Am Speedway Officials.
Failure to comply with the rulebook and or tech will result in the loss of partial or all earnings
based for the race night, and including but not limited to race night points, point fund awards and/or
race winnings. The penalty including fine and suspension may include the driver, crew chief, the car and
car owner as stated in the penalty notice.
Protests: All protests must be turned into Can-Am Speedway Tech Official within ten (10) minutes of the
checkered flag and/or conclusion of the race. Eligibility of protest; top 10 finish or finishing on the lead
lap. The protest fee cash must be paid at the time of the protest.
Only the car owner or the driver of the car may submit an official protest.
Any refusal of inspection and/or non-compliance during an official protest will be subject to
penalty and/or disqualification and/or fine and/or suspension and/or any other action deemed
appropriate by Can Am Speedway Officials.
If the car protested is found legal, the protesting fees will be released to the protested team less
the protest filing fee. Lab and machine shop fees incurred shall be paid by the person filing the protest.
If the car protested is found to be illegal, the protesting fees will be returned to the team filing
the protest less the filing fee. Lab and machine shop fees incurred will be paid as part of the penalty.
Any altercation relating to an incident with Officials and/or any other racing participants
regarding the protest by the team filing the protest will nullify the objection.
PROTESTING FEES: (Figures in parentheses are administrative filing fees): If not listed, just ask.
Motor Tear Down of any kind: cylinder head removal, balance shaft inspection etc. $250($50)
Inspection of Intake, Cams, computer and ignition systems etc $150 ($50)
Fuel test including chemical analysis $300 ($50)
All other technical protests: suspension, driveline, wheels, tires, weights etc $100 ($50)
Grudge protests and/or any protest that are not in the spirit of good standing will be denied.