2018 Strictly Street Rules

The intent of Strictly Streets is to provide an affordable entry-level division with stock 6/8 cylinder cars and they continue to be an exciting division of Saturday night racing at Wiscasset Speedway!  The following rules are a continued effort by division participants working together for division growth with respect to car variations, affordability, the fairness of competition and consideration of the wide variety of automobiles currently available with their advantages/disadvantages and the advance of technology.  While we understand these rules may not perfect and may not encompass all cars, we request they not be interpreted as opportunities to cheat and/or discover loopholes to gain an advantage.  We shall always welcome and work to accommodate all who respectfully meet the spirit of the rules and desire to join us racing Strictly Streets at Wiscasset Speedway.

3/22/18 Rules Set. NOTE:  Fiberglass Hoods Allowed.


DRIVER SAFETY REQUIREMENTS – drivers must wear the following required items at all times while on the racing surface. 

  1. One or two piece long sleeve SFI approved fire resistant suit in good condition and free of rips, tears or holes.
  2. Fire resistant shoes and gloves.
  3. Helmet must meet or exceed the Snell 2010 standard.
  4. Face shield, glasses or goggles.

Highly Recommended & Encouraged not yet required but you know it’s coming 😊

  1. Head and neck support/restraint safety device.

Recommended not required

  1. Fire resistant underwear, socks, and head stocking.


  1. American made passenger production six (6) or eight (8) cylinder cars. All chassis must maintain stock wheelbase for frame utilized.  No structural modification.
  2. No station wagons, convertibles, 4-wheel drives, all-wheel drive, super charged or turbo charged models.
  3. No Leaf spring models permitted.


  1. Minimum roll cage tubing specification 1¾ inch x .095 inch DOM or seamless tubing. In the interest of safety, water tubing, exhaust tubing, etc. is unacceptable.
  2. Cars are permitted to utilize a full cage structure mounted safely to chassis. Cage structure may extend to directly forward of radiator location. Rear cage structure may extend to the farthest rear point of chassis frame structure. All Tubing is allowed to intersect safely to main four (4) point cage structure. A bar at dash height across the front uprights is required. The rear of the roll cage must be mounted a distance to be measured from the center line of rear end housing to the location point of no less than twenty (20) inches, plus or minus one half (½) inch. Roll cage material is subject to sonic testing or inspection hole testing for compliance with the rules. A tester for analysis of roll cage strength may be used repeatedly.
  3. The cage shall consist of four (4) vertical upright bars connected at the top on all sides. An “X” member must support the rear vertical uprights.  A minimum of four (4) horizontal bars are required on the left side door area and a minimum of three (3) horizontal bars are required on the right side.
  4. Top hoop and uprights must closely conform to the roof line and windshield posts; a maximum of a two (2) inch space between the body and cage components is permitted.
  5. Vehicle must have driver door plate minimum of sixteen (16) gauge, three sixteenths (3/16) inch plate maximum metal between door bars and body on driver side only. Sixteen (16) gauge steel may be welded in between door bars and door bar connectors on driver side only.
  6. No tubing may beaded forward of the radiator support.
  7. Any bar within the drivers reach must be padded with an approved product. Pipe insulation will not be acceptable.
  8. Front and rear firewall must be completely sealed from the driver compartment with sheet steel similar in thickness to existing car structure and securely welded in place.
  9. All welds are to be of high quality and must completely surround the joint. Absolutely no butt welds or sharp edges anywhere.
  10. Stock dash frame must remain in place, but can be covered with sheet metal.
  11. Quick release steering wheel shall be permitted with use of OEM steering column. Steering wheel center must be padded.
  12. All fuel filters must be of metal construction. No plastic, glass or other material will be allowed.
  13. Any line containing a combustible material must be steel and routed outside of the drivers compartment.
  14. Electric fuel pumps must be wired through a low oil pressure cut off switch.
  15. Five point quick release harness system in good condition mounted with three eighths (3/8) inch bolts minimum Grade 8 washers and locking nuts. These must be attached at two (2) separate points on the frame, equal distance from the seat back and not less than twelve (12) inches apart. (See manufacturer instructions for details).  Sternum belts are highly recommended.
  16. Aluminum racing seat with right and left head supports. Seat must be mounted and attached securely to the cage. A support brace must be installed at the rear of the seat.
  17. Racing regulation window net with quick release attachment required to be securely installed on driver side window. Plastic, plastic brackets, tape, wire or any other makeshift window net creation and/or mounting devices will not be acceptable.  Window nets must be securely fastened at all times when car is on racing surface.
  18. Minimum three (3) pound fire extinguisher mounted with quick release metal bracket within reach of driver when belted in. Extinguisher must be operational with full gauge reading.  Plastic brackets, tape, wire or other makeshift mounting devices will not be acceptable.


  1. Cars should be neat appearing. Panels must remain as manufactured and must match stock frame for body used unless otherwise described below. All chassis must maintain stock wheelbase for frame utilized.  No structural modification.  Frame, body and engine to be same manufacturer.
  1. Uni-body cars will not have tubing structure integrated within chassis construction that extends beyond the fore or aft firewalls. This structure may be connected to the chassis at four points intersecting at ninety (90) degree angles only.
  1. Five star Street Stock Monte Carlo Steel aftermarket replacement panels are permitted with use of factory matching roof on all GM full frame cars.
  2. Original dimensions of all bodies must be retained as manufactured. Windshield angles will be degreed. All body panels must be steel.
  3. All cars must have complete bodies prior to the race meet and must be stock to all measurements.
  4. Doors must be welded or riveted shut.
  5. Full windshield must be used. Lexan type replacement may be used. All other glass must be removed. Lexan type rear window may be used. No tinted windows permitted. Quarter panel windows of clear Lexan construction are permitted. No side windows, deflectors, or boxing of door opening area is permitted.
  6. All cars may use either a stock or aftermarket OEM type header for make and model. All aftermarket nose and tail sections must be approved by tech director. Rear tail area of car must be fully enclosed. No modifying of rear cover will be allowed for the purpose to allow air pass thru.
  7. Rear trunk lid spoilers are allowed. Constructed of clear Lexan material with a maximum size of five inches by sixty (5×60) inches, made from two (2) equal length pieces with a one (1) inch space between the two (2) pieces.  Spoiler may not extend beyond the rear quarter panel and be free of any visible obstruction – ie: decals.
  8. Maximum distance from ground surface to top edge of spoiler shall be no more than forty three (43) inches.


  1. Seat: Driver’s seat must be specifically designed for auto racing and be constructed of .125 inch thick aluminum. Must be attached to the roll cage.  Must have right and left headrests.   Fiberglass seats are NOT permitted.  Aircraft quality hardware must be used to install the seat in an approved manner and be in the stock location. Mounting plate may not exceed the dimensions of the seat bottom and must be a maximum three sixteenths (3/16) inches thickness.
  1. Firewalls: Stock forward firewall for make and model must be used and in the original position.  Holes must be covered with steel and sealed. No aluminum patches permitted. Rear firewall must all be twenty two (22) gauge steel and seal off the trunk area from the inside of the car and be in the stock location.
  1. Deck lids: Full steel hood and trunk lids required. Inner reinforcements must be removed. Must use positive pull-pin type fasteners. Hood and rear deck lids must be tethered to roll cage. One hood scoop, of minimal height will be allowed on cars using the 602 crate motor option.  Fiberglass hoods allowed.
  1. Inner panels: Inner panels may be removed on all cars. Wheel openings may be trimmed for tire clearance but edges must be rolled inward to eliminate tire damage to competitors. All combustible material and plastic must be removed.
  2. Rub rails: Rub rails must stay against body and remain between the wheels.
  3. Bumpers: Stock front and rear bumpers may be used. Approved tube type front and rear bumpers may be used and must be covered with an approved bumper cover.
  4. Floor pan: Body (floor pan) must be mounted in stock location. “A” posts must remain complete and be attached to roof in stock location.
  5. Clearance: No part of the body (including side skirts and nose piece) may be closer than six (6) inches to the ground. Air pressure changes after race will not be permitted to gain clearance.


  1. Fuel Pump: Stock fuel pump only. No electric, adjustable or rebuild able fuel pumps permitted.  Exception, Six (6) cylinder cars with fuel injection may run electric fuel pumps but they must be wired through a low oil pressure cut off switch.
  1. Fuel Cell: Approved fuel cell with all components is mandatory. Must be in trunk area and enclosed in a twenty two (22) gauge metal canister. Maximum capacity is sixteen (16) gallons. Fuel cell must be centered to center line of car. A check valve must be installed on the vent line. It is recommended that a fuel line shut of valve be installed in the trunk area. Fuel cell must have two (2) lengthwise and two (2) crosswise straps to hold the cell in position. Fuel cell must be a minimum of fourteen inches (14″) from the ground.
  2. Fuel Filters: All fuel filters must be of metal construction. No plastic, glass or other material will be allowed.
  3. Carburetor: Unaltered, gauge legal, Holley #4412 only. Choke blade and shaft removal allowed along with tuning changes to the power valve, jetting, and accelerator pump.
  4. Carburetor adapter: Carburetor to intake adapter – Mr. Gasket #1929 or 1937 only.


  1. Springs: All springs must be a stock appearing spring. Front springs must be the same height and diameter side to side. Rear coil springs must be the same height and diameter side to side.  Minimum coil spring outside diameter is five (5) inches.  Spring boosters are permitted. Solid spring spacers are permitted.  No springs may go through top of frame. No holes may be cut in frame to gain access. Jacking bolts are permitted in the rear but must be utilized in a manner that the spring remains in stock location.
  2. Sway Bar: Must be stock OEM sway bar for make and model and mounted with all rubbers and washer in stock location on one side only, but may be adjusted on other end.
  3. Shock/Strut: Original equipment gas shocks/struts only. Shocks/struts must be in original position.  No adjustable shock/struts permitted no painting or removing numbers from the shocks/struts.  No racing or performance shocks allowed – ie: Bilstein, PRO, AFCO, etc.  Upper strut mount must be OE type.  No caster/camber plates, not solid bearing mounts.
  4. Front Suspension Components: All front suspension components must be stock for make and model for chassis used.  Left A frames to be used on left side only and right A frames to be used on right side only.  Neoprene control arm bushings that are stock exact replacement fit are permitted.  Ball joints must remain OEM factory replacement only, but are not restricted to year, make and model matching. Ball joints must be in stock location. No low friction or screw in ball joints allowed.
  5. Rear Suspension Components: All rear suspension components must be stock for make and model used if not previously detailed. All rear suspension point locations must be in stock as produced location utilizing stock mounts.  Neoprene trailing arm bushings that are stock exact replacement fit are permitted.  Two (2) jacking bolt assemblies are permitted in rear suspension mounted to stock spring pocket.  No adding to or deleting of components, brackets, or mounts. Locating holes may be moved but original hole must be welded close. Holes must be in same location side to side.
  6. Wheelbase: Wheelbase must remain stock for make and model chassis used. Car minimum wheelbase is one hundred (100) inches. Wheelbase measurements must be within one (1) inch tolerance from left to right side of car.
  7. Tread Width: Maximum tread width is sixty four and one half (64½) inches measured center to center.  No Exceptions.
  8. Ground Clearance: Minimum ground clearance shall be six (6) inches and measured from the lowest part of the frame to the ground. All measurements will be taken with driver in the car and race ready.
  9. Strut Towers: The front third of the strut tower may be removed to gain access to the tie rod ends. The aft two thirds of the tower must remain unaltered. Towers may be reinforced but not moved. The strut mounting plate must not be altered or moved.  The strut tower maybe re-drilled or slotted for caster/camber adjustment.
  10. Third Link: The stock third link on 3rd and 4th Generation Camaro/Firebird must be mounted in a manner that does not allow for adjustment. The play (movement) at the forward end of third link shall not exceed three eighths (3/8) of an inch.
  11. Camber: Two and one half (2½) inches Right Front and three quarter (3/4) inch Left Front.  No tolerance.  Camber measurement will be from the rim.


  1. Eligibility: Only a stock engine that was available as a regular dealer option for year of car used shall be permitted. Like engines of different year may be used if ALL measurements are alike and all bolt-on equipment fits that engine. Fuel injected motors are permitted in six cylinder, front wheel drive models only. All six cylinder applications MUST have prior approval before competing. No roller components allowed in any eight cylinder engine.
  2. Engine Location: Engine must remain in stock location.  Stock motor mount must be used except for Gen4 Camaro/Firebird.  Approved fabricated mounts which incorporate the stock motor mount may be used to gain fuel pump/steering shaft clearance. Mounts must be approved by Tech.
  3. Crankshaft: Crankshaft must be OEM steel or cast. No lightening or knife edging permitted.  No offset grinding.  Stock stroke only. 
  4. Engine Blocks: Engine block must be stock for make. Minimal machine work permitted.  Maximum .060 overbore permitted.
  5. Piston/Rods: Any stock flat top four valve relief piston and stock replacement rods allowed. No aftermarket performance pistons or aftermarket alloy rods permitted. No special performance parts permitted.  No portion of the piston may protrude from the block.
  6. Oil Pan: Stock appearing for engine used. No external oil coolers permitted.
  7. Cylinder Heads: No porting or polishing permitted. Minimal surfacing allowed. All cylinder heads must be cast iron, original equipment manufacturer production or aftermarket stock replacement. All heads must be identifiable thru casting numbers.
    1. General Motors maximum intake diameter 1.94”/maximum exhaust diameter 1.60”.
    2. Ford Windsor motor maximum intake diameter 1.84”/maximum exhaust diameter 1.54”.
    3. All General Motors valve spring maximum diameter is 1.250”.
    4. Any cylinder head not listed must be approved by the management of Wiscasset Speedway prior to use.
    5. Minimum combustions chamber volume to be no less than 58cc’s.  Actual not listed.
    6. Vortec heads are allowed on built motors with restrictions of a) 2116 intake only b) max cam lift (measured at lobe) of .450.
  1. Camshaft: Stock for engine used with maximum gross valve lift of .450. Measurement will be at the cam lobe and multiplied by the nominal rocker ratio of 1.5:1.
  2. Valve Lifters: Stock for engine used. Only hydraulic flat tappet lifters may be used. No roller lifters permitted.
  3. Rocker Arms: Stock ratio only. No roller rockers permitted.
  4. Intake Manifold: Two (2) or four (4) barrel intake manifold for engine used. Stock aluminum or aftermarket 2101/2116 intake manifolds permitted. GM intake manifold #14057059 and #14057060 are not permitted. No Brezinski, marine, or truck/bus intake manifolds permitted. No modifications what so ever.
  5. Engine Displacement: Maximum Engine displacement (C.I.D) by manufacturer before permitted over bore – GM: 350/Ford: 351
  6. Engine Compression: Maximum permitted compression on all engines will be2 – 1 absolute.
  7. GM “602” crate engine option: Use of the GM “602” Crate engine is permitted as produced specifications shipped from manufacturer. No rebuild tolerances are permitted (IE: if it’s worn out….Replace it!) GM suggests when this motor needs to be “freshened” sell it to a hotrod builder and buy a new one. J


  1. Ignition System: Stock ignition system must be used including coil assembly. High voltage and non- exact replacement coils are not permitted.
  2. Starter: Starter must be in proper working order. Starter must be mounted in factory production location for engine used.
  3. Battery: Batteries must be securely mounted in a fully enclosed box, located forward of the rear firewall and remain within the roll cage structure.


  1. Radiator: Any radiator that fits under the stock hood is allowed.  Fabricated brackets may be used.   Water and a cooling additive only.  No antifreeze allowed.  Must have a minimum one (1) quart capacity sealed overflow container.  Car must not have fluid leaks of any kind.
  2. Fans: Mechanical or electric fans may be used.


  1. Exhaust Manifold: Must use stock cast iron exhaust manifolds.  No headers permitted.  No center dump (ram horn) exhaust manifolds allowed.
  2. Exhaust Outlet: Exhaust outlet maximum allowable pipe size is two and one half (2½) inches in diameter. Exhaust pipes must go beyond the driver and dump under car.
  3. Muffler: Functional mufflers are REQUIRED – ie: Glasspacked.


  1. Flywheel: Stock steel flywheel required. No alterations permitted. Minimum weight of sixteen (16) pounds.
  2. Transmission: Transmission must be stock automatic three (3) or four (4) speed transmission or cast iron manual three (3) speed transmission. Note: Short Pre-1970 GM cast iron three (3) speed is NOT permitted.  Cars utilizing manual transmissions are required to use either an OEM factory bell housing or steel scatter shield.  External transmission coolers permitted, but must remain in the engine compartment. All gears must be in proper working order.  All internal parts are to be OEM factory stock components with no modifications.  Stock OEM converter/clutch required. Minimum 10.4 inch OEM clutch assembly only.  After market clutch pedal assembly is permitted.
  3. Drive Shaft: Only steel driveshaft shall be permitted.  Drive shafts must be the stock length for declared application.  Steel driveshaft only and must be painted white.  It is recommended that two (2) 360 degree brackets, no less than two inches (2”) wide by one-eighth inch (1/8”) thick, be placed around the drive shaft and fastened to the floor or cross member to keep the drive shaft from becoming dislodged and dropping out.
  4. Rear End: Only stock rear ends for year and model of car used permitted. Gear ratio shall remain between 3:08 and 3:73. Rear ends may be open, welded or run a spool.  No limited slip or other type carrier permitted.  Racing axles are recommended.


  1. Wheels: Seven (7) inch or eight (8) inch standard aftermarket racing wheels allowed.  Only fifteen (15) inch wheels may be used.  Lug nuts must be one (1) inch and five eighths (5/8) inch wheel studs recommended.  No Light Weight Wheels.  No Air Bleeders.
  2. Brakes: Four wheel brakes in proper working order are mandatory.  Brake rotors must be OEM and same dimension side-to-side.  No drilling or lighting of any brake components. Aftermarket brake components may not be used. No aluminum brake components are allowed.  Single piston brake calipers only. Rear disk brakes are not permitted.  Exception– Original equipment rear disk brakes will be allow on the gen4 Camaro/Firebird but may not be lightened or altered.
  3. Tires: Wiscasset Speedway Official Track Tire = Hoosier 27.0/7.0 – 15 Rib Compound 790 will be the only approved tire.
  4. Wiscasset Speedway shall keep a registered inventory of tires for each Strictly Street team with all tires being registered to the car number. Strictly Street teams shall be responsible for their own tire management.  Wiscasset Speedway will not impound, manage or provide storage for team tires.
  5. From April 7th to May 4th, Strictly Street teams shall have the option to purchase a maximum of six (6) new tires to begin their registered tire inventory for the 2018 racing season. Beginning May 5th, on actual Strictly Street racing events thereafter, teams shall have the option to purchase a maximum of one (1) new tire for their registered tire inventory.  Should the option of one (1) new tire purchase not be exercised, the option is forfeited.  All tires shall be registered to the car number.
  6. Strictly Street teams arriving to race after May 4th shall have the option to purchase a maximum of four (4) new tires to begin their registered tire inventory and on actual Strictly Street racing events thereafter, shall have the option of purchasing a maximum of one (1) new tire for their registered tire inventory. Should the option of one (1) new tire purchase not be exercised, the option shall be forfeited.  All tires shall be registered to the car number.
  7. Should a tire be damaged during the race event, it shall be the responsibility of the race team to present the damaged tire that day and within a timely manner to Tech for inspection. All tire replacements must have a written record with Tech regarding inspection and approval for replacement.  Only tires with 50% or more tread will be eligible for replacement.  Replacement of damaged tires will be limited to three (3) for the season.  No exceptions.
  8. All cars are subject to random testing at the discretion of Tech, durometer testing will be conducted On Track after heats and features of the top five (5) cars. Failure to meet the 2018 division preset number (Right Sides 50 and Left Sides 45 with No Allowances) will be subject to penalty as follows: Heats – illegal tire(s) held at Tech for the remainder of the race event and not allowed again until cleared by Tech; forfeiture of heat points and feature start is rear of the field.  Features – Full DQ with illegal tire(s) not allowed again until cleared by Tech.
  9. While division participants agree use of tire conditioning agents is difficult to police – all agree application of such will not be allowed at the track.
  10. Speedway management reserves the right to modify tire rules in conjunction with division needs & concerns.


  1. Car weights are race ready, full of fuel and with driver in the seat.
  2. Minimum total = 2900 lbs. with 54% left side weight.  No exceptions.
  3. All weight must be lead, painted white, marked with car number and secured with 3/8” diameter bolts.


  1. All car numbers are assigned/registered by Wiscasset Speedway.
  2. When changing divisions, a new number will be assigned.
  3. Car numbers must be a minimum of eighteen inches (18″) high and three inches (3”) wide.
  4. Numbers shall be painted in contrasting colors to the car on both doors and the roof. Reflective chrome, gold or prism numbers will not be acceptable.
  5. Roof numbers should be visible as read from the grandstand side of the car.
  6. The car number must appear in six inch (6″) high numbers in the uppermost corner of the windshield on the passenger side and also on the right rear.


  1. Two way communications are allowed; however, Wiscasset Speedway Management will require frequency registration.
  2. RaceCeivers are mandatory equipment.

 All race car components, including sealed engines, may be subject to teardown/dismantle inspection at any time.   Refer to General Rules – Tech Information Section.

For the purpose of rule interpretation, the definition of OEM is a part specified by the manufacturer as being for a specific make, year, model of automobile or a commonly available replacement parts supplier such as NAPA, Car Quest, O’Reilly, etc.  This does not include GM Bowtie or Ford SVO.

DISCLAIMER:  Motorsports At All Levels Pose A Risk To Your Well Being.  Following The Rules Set Forth By Wiscasset Speedway In No Way Guarantees Or Suggests Your Safety.

Wiscasset Speedway Reserves The Right To Modify This Document At Any Time.  Such Modifications Will Become Effective And Enforced On The Next Race Date.

Last Edit 12/2/17

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