Street Stock Rules
2019 Street Stock Rules:
Please read and understand the philosophy of this class we are building for the future. This is a street stock economy style class. It will be heavily teched to keep technology and rules creep from heavily influencing the class now or into the future. We will endeavor to keep this rules set for years to come. In an effort to build this class from the ground up, Corrigan Oil Speedway has closely patterned the street stock rule set to mirror the Michiana set of rules of tracks to the South and West, with the following exceptions:
Corrigan Oil Speedway does allow leaf spring cars that are stock Camaro, Firebirds, Nova, and various other factory full frame or full sheet metal stamping configured cars. If you have a fabricated tubular clip chassis with leafs you are ineligible for this division.
Our cars will be factory frame/crossmember stamping converging 4 link cars, or factory stamped sheet metal leaf spring cars, or factory frame leaf spring chassis. NO FABRICATED TUBE CHASSIS. FABRICATED TUBE CHASSIS CARS ARE SPORTSMAN/LATE MODEL cars, not street stocks. – deviations from this philosophy will still be allowed to race but will be moved up to the late model sportsman division at Corrigan Oil Speedway. Tube sections from rear axle centerline to the rear bumper are permitted as a structural alteration to the fuel cell area. Because we are attempting to blend east and west side cars, we have omitted our ride height rule. East has lower ride rules than west, and some west teams were using taller springs compressing to a higher rate on track to meet pit ride rules. Just ride your car at the proper geometry needed and get it over our scales without dragging. if you can’t get on and off the scales without dragging you will not race. Your fuel cell must be 8″ off the racing surface and protected at all times.
PLEASE NOTE. It is the driver’s responsibility to look over and/or upgrade all personal safety equipment: a full containment seat, a head and neck restraint, a fuel cell with all of the proper check valves in place, a clean untorn fire suit including proper undergarments, gloves, socks and shoes that all meet the highest of safety ratings. It is highly recommended that all safety equipment meets the Snell 2015 rating and be SFI/1 approved.
The General Rules applicable to all classes follow at the end of the class specific rules.
Cars must pass tech inspection BEFORE entering the racing surface for the first time each day. A visible tech inspection sticker will be posted on the left-hand windshield before car is allowed on the racing surface. The transponder must be working, charged and visibly indicating that it is functional, mounted on the right-hand axle tube or within 6 inches rearward of the right-hand tube clearly visible to tech. Qualifying will be eliminated from our nightly routine in 2019 and beyond. Our qualifying will be taken from transponder data from the fastest lap time of the day. Cars not breaking the transponder beam will be black flagged immediately. Strict breakout enforcement will be in place. This will allow hot lapping to occur later up to 6:45. Late round qualifying will no longer happen because if the extended time allowed. If a car shows up late, they will be allowed to tag on the back of the heat and the features after receiving a tech inspection sticker. Mandatory drivers meeting will be at 7pm each Friday night. Sunday drivers meeting will occur 1/2 hour before racing begins. A published itinerary will be posted at the pit booth and the scale house each night.
1. BASE WEIGHT
a. The minimum weight before qualifying or any race is 3100 pounds including the driver.
b. 57% left side weight. A car may be weighed at any time pre-race or post race by tech. It is your responsibility to ensure that your left side weight does not exceed 57% at any time.
a. Hoosier 800 Series.
b. Tire soaking and/or any other types of tire tampering is prohibited.
c. Steel 8″ racing safety wheels with 1″ lug nuts.
d. Tread width will be 77” measured with toe plates.
a. The minimum wheelbase is 108”.
b. Rear wheel drive, stock OEM clip frames only.
c. Frame must utilize stock factory produced front cross members, stock factory produced side rails, stock factory produced rear crossmember. (factory produced means “original equipment manufacturer produced, not aftermarket)
d. Wheelbase may be altered from factory length to no measurement shorter than 108″
e. No tubular fabricated chassis of any kind.
f. Minimum fuel cell height off the ground will be 8” which can be checked before qualifying or any race.
g. Stock OEM style gearbox; no rack and pinion steering components allowed.
e. Factory suspension mounts must be retained other than the upper A-frame mounts on the front clip. Factory mounts are to be within + or – 1″ of the o.e.m configuration.
f. tubular frame structure is allowed from the centerline of axle rearward to reinforce the fuel cell to bumper area. 2″x3”.095 WALL minimum. This is the only tube frame modification allowed.
a. OEM style stock appearing steel body from front to rear. (See rule below on Five Star body parts that do
not have to remain steel).
b. The doors and the rockers can be made from aluminum or sheet metal but will have the stock body line and curve as do the stock panels. All bodies will be stock appearing; no flat sides or stretched out bodies. ABSOLUTELY NO OUTLAW FABRICATED TYPE BODIES. NO EXCEPTIONS.
c. Five Star offers a stock appearing ’88 Monte Carlo steel body at a reasonable price. The entire body is
steel and has a fiberglass stock sized roof with C pillars. Running this Five Star unaltered fiberglass roof
mounted 100% in a stock appearing fashion is allowable. Five Star also makes a stock appearing (not a flat
sheet of fiberglass) replacement fiberglass hood for these cars which is also allowed. Stock
size/height/length A & B pillars, no lowering or moving the full stock sized roof.
d. All cars will have an unaltered Five Star equivalent nose and tail piece. There will be no gaps or
overlapped panels that will let air escape. Mount these panels as they were intended to be mounted. All
nose and tail pieces will be mounted in a stock fashion. The same thing goes for the material joining
fenders to the nose piece. A 1981 aftermarket Camaro nose piece can be run on a full stock bodied
Camaro. No homemade rear tail panels or nose pieces. Cars incorporating a stock type header panel or
look are the exception to this rule. a 59 pontiac can still look like a 59 pontiac. a 67 mustang can
still look like a 67 mustang. a 1969 camaro can look like a 1969 camaro. Vintage steel original bodies are encouraged.
e. All cars with stock appearing bodies will be allowed a 5” x 60” flat clear spoiler centered – no lip.
Innovative bodies with sloped roofs and long windshield angles may not be permitted to run a spoiler.
f. All truck bodies require a back window, a flat tonneau cover up to the top of the bed and have minimal
rake on the bed. No downforce designed truck beds. No spoilers of any kind on a truck body.
g. All Street Stocks will retain windshield posts which will be steel or fiberglass. No wraparound
windshields of any kind. No stretching the pillars out to achieve more roof or windshield angle. Roof and
windshield angles are to remain close to OEM measurements.
h. Install the bodies level and to spec. Weight penalties or the no spoiler policy may be assessed for bodies
built outside of the stock appearing rules, as determined by officials. It is permissible to be semi-creative
with a street stock body; however, the front, the rear, the roof, and the windshield angles must be
relatively close to matching that car body. No mixing and matching of car bodies from front to rear.(no car body noses and truck rears, etc)
i. Rear quarter panels must remain relatively close to that of stock body measurements. No manipulation of the right side quarter panel shelf. right and left quarter panels must be symmetrical at c pillar. If they are not, the car will remove spoiler.
j. No cars or trucks will have any extra rake built into their bodies from front to rear.
k. No body panel or nose piece will be lower than 5” off the ground (measured with driver in the car).
l. Rub rails are allowed with no sharp edges or fasteners.
m. A Lexan windshield is mandatory. No rear window, except as required on truck bodies. Rear opera
windows are permissible. The side window panel may not exceed 12” (measured from the bottom of the
windshield post along the top of the door then 90 degrees back up to the windshield post).
n. Cars with non-steel template or fabricated bodies (aluminum or fiberglass) are not allowed to run a rear spoiler. This is the penalty for shedding the original type body weight. If you have more than aluminum doors on your car – you may not run a rear spoiler.
5. SHOCKS AND SUSPENSION.
a. No bump stops of any kind.
b. Rear trailing arms can be OEM or manufactured. Adjustable heims are permissible; however, the frame
mounts and the rear end mounts will remain stock and in stock location. All trailing arm lengths must be
within 1” of a stock OEM trailing arm for that car.
c. All remaining suspension parts will remain stock, be in the stock location and be mounted in the stock
angle with the exception of the front shocks which can be mounted outboard.
d. Rear springs and shocks must be stock appearing and in stock location.
e. Heims ends are allowed only on shock ends, rear trailing arms and in place of front tie rod ends.
f. Sway bars must remain stock (no splined sway bars) but may be mounted above or below the control arms. Threaded rod adjustments on the A-frame are permissible.
g. Rear and/or front load bolts (screw jacks) are allowable.
e. Aftermarket tubular upper A-Frames are allowed. A-frames will have stock type ball joints (no monoballs). Upper A-Frame mounts may be modified and be within 1” of the stock location.
f. All shocks will be steel and non-adjustable. No canister shocks of any kind. No bump stops of any kind.
No Schrader valves of any kind. All shocks will be a nationally advertised shock and will
not exceed a list price of $145 per shock.
g. No coil binding.
h. No three link rear suspensions. No panhard, jbar, watts linkage, track bar, lift bar/arm or any other suspension allowed other than factory converging 4 link type or leaf spring.
i. No strut arm type front suspensions.
j. Tech may remove a shock at any time to inspect for internal bumpstops or bump springs. –
k. Corrigan Oil Speedway has a shock claim of $165. A shock may be claimed at the end of a feature event by coming to the tech lane scale house and submitting $165 cash per shock within 5 minutes of the end of a feature event. If the car owner or driver refuses the shock claim, All points and monies will be forfeited for the entire race day. Shocks may not be claimed prior to a feature event.
l. Front and rear spring pockets may be modified in the stock frame rails and stock cross member for screw jacks. (jack plates, spring height location. must retain factory rear cross member. height of jack plate may be adjusted.)
6. ENGINES/DRIVE TRAIN.
a. Engines must be stock appearing, all cast iron block and heads and in stock location.
b. Cast iron or aluminum intake.
c. Cast iron exhausts manifolds or headers are allowed with 3” maximum exhaust tubing.
d. The carburetor will be a single 2 or 4 barrel with a maximum 1” store bought adapter or spacer.
e. HEI style ignition only, no MSD style.
f. OEM automatic or standard transmission;
g. racing transmissions are not allowed. no bert, brinn, winters, falcon, jerico etc. no internal clutch manual transmissions
h. Minimum clutch size will be 7¼”. A 2” inspection hole must be cut in all bell housings so the clutch can be easily seen.
i. Stock style OEM rear ends only; four link or leaf suspension only.
j. A steel 9” Ford is permissible with 4 link mount or leaf mount.
k. No quick change rear ends or aluminum rear end components of any kind.
l. No reverse mount starters of any kind.
m. No blocks externally lightened by machining.
n. Engine must have #1spark plug on the same plane as the balljoint centerline*
a. Aftermarket brake pedals and or master cylinders are allowed.
b. Aftermarket brake calipers are allowed.
c. Rear disc brakes are permissible. No in cockpit adjustments of any kind including brake bias adjuster. All pedals will be in a relatively stock location and the driver will be seated relatively in stock location.
a. The full floorboard and front firewall may remain stock or be fabricated.
b. A fabricated foot box must have sides and bottom that are a minimum thickness of 1/8” steel. No thin gauge sheet metal footboxes will be allowed.
c. The passenger side sheet metal/floorboard will remain low next to the driver going
over to the right side frame rail.
d. An aftermarket gas pedal is highly recommended.
e. The main driver’s hoop and door bar construction of the roll cage will be 1 3/4″ tubing .095 wall thickness minimum. It will have drivers side door plate reinforcement on the door bars welded in place.
9. FUEL CELL.
a. Fuel cells are mandatory with an 8” minimum ground clearance.
b. A fuel cell guard behind the cell with two forward braces is required. Any plating of the frame around the fuel cell is permissible.
c. Stock rear frame rails may be replaced from behind the spring pockets rearward to the bumper with 2” x 3” steel tubing.
This is our economy rear wheel drive division. Any deviations that are out of the spirit of the rules of a stock type, economy type street stock style car, will be asked to move up to the late model division. We must work together in long term vision of the sport to police ourselves with cost containment measures.