STREET STOCK RULES

2018-2020 STREET STOCK RULES

Refer to the Safety Rules for the basic building rules (Roll Cage, Bumpers, Fuel Cell, and Approved Clothing etc.)

No radios allowed in any classes.

All Cars must be stock in every aspect with the following exceptions.
When the word "stock" is used it means as it came from the factory for the particular year and model in question. This also includes replacement parts by part number. Any questions on parts need to be directed to the board of directors.

Chassis

  1. Any North American built, stock production passenger car, or pick-up truck. No station wagons, convertibles, or Corvettes. 1982 and newer Camaros or Firebirds not permitted.

  2. 70-81 Camaro and Firebird allowed with stock front clip, unibody and rear suspension and body complete only.

  3. No four wheel drive cars permitted.

  4. No four wheel independent suspensions permitted.

  5. No excessive rear movement of the stock body permitted. Only a max. of 1" from the stock body mounts tolerated.

  6. Any steel body may be run over any chassis of same make. No distortion of the body is permitted to fit the chassis. Only the movement of the wheel openings may be moved to fit the wheel base of the chassis being used.

  7. Any stock appearing nose and tail pieces allowed.

  8. Bodies must be complete and remain stock appearing. Any damaged panels must be replaced before the next race day. 22ga. sheet metal may be used for repairs, no aluminum.

  9. After market steel body panels allowed.

  10. Hood must have a min. of two but four hood pins recommended in the front to hold it down.

  11. Holes around hood pins must not exceed 5/8". Straps connecting pins to the hood or body recommended. Hoods can not be bolted shut.

  12. All cars must have front and rear bumpers. Bumpers must be strapped to fenders on all four corners to prevent hooking.

  13. Minimum 3" x 36" yellow strip on back of trunk lid or on rear bumper for all rookie drivers.

  14. Wheel wells may be radiused for tire clearance. Fender well edges must be rolled under, not out. No sharp edges.

  15. All doors must be welded or bolted shut.

  16. Rear spoilers allowed. Spoiler can not be more than 6" high. Must be bolted to the trunk lid and can not extend beyond the width of the fender. No sides, no Gurney lips. No roof wings.

  17. The interior of the car must be stripped of all flammable material. All sharp objects must be removed or folded over.

  18. Rear view mirror and a left side mirror that doesn't exceed body line allowed.

  19. Gas pedal may be modified or aftermarket. Pedals must remain in stock location. Toe hook or solid linkage recommened.

  20. Driver's compartment must be sealed off with minimum 22 ga. sheet metal, no aluminum.

  21. Stock front firewall and floor must be retained to behind driver. Passenger side of transmission hump may be removed and retinned with a min 22 gauge sheet metal. Behind driver may be removed and tinned over with a min. 22 ga. sheet metal. No Aluminum. Any discrepancies see tech man.

  22. All glass must be removed, except the following: A full windshield with two straps or tubes inside. The Earnhardt bar or strap on the outside acceptable. Outside, four stong tabs if using a glass windshield. Or if using a Lexan front windshield, Mount with 3/16 rivots spaced maximum of 6 inche spacing between rivots.

  23. Pick-up trucks must have lexan rear window or tin cover over truck box.

Wheel Base

  1. Cars must be a min. of 108" wheel base. Frames over 108" wheel base may only be shortened in the straight, middle section to achieve 108" wheel base.

  2. Reinforcing the frame, such as boxing or adding an "X" brace is recommended.

  3. Fords may run a min. 104" wheel base on the 1984 to 1988 T-Birds and Cougars only. Must retain the original suspension that came with that car. No newer Mustangs permitted.

  4. All unibody cars must have sub frames tied together. Minimum of 2” x 3” 0.120” steel tubing recommended.

  5. Wheel base must be within 1 inch variation right to left side (strictly enforced).

  6. A chain or eye front and back of car for lift and towing recommended.

Engines

  1. The engine must be the same manufacturer as the frame and body (GM frame, GM body, GM engine, etc.).

  2. The engine must be in the stock forward location and in the centerline of the car without altering the frame. May use aftermarket or modified/fabricated mounts.

  3. NO ALTERATIONS TO THE FRAME IS PERMITTED FOR FUEL PUMP OR EXHAUST MANIFOLD CLEARENCE.

  4. Small block engines only maximum engine size GM- 350, Ford 351, Chrysler 360 plus max. .060" overbore permitted. Must use stock block “Stock replacement” aftermarket crank and rods will be allowed. Part numbers to follow. Contact tech man for details.

  5. All crate engines must comply with all of the engine rules!

  6. Stock distributor and stock design ignition parts only.

  7. A Rochester 2 barrel carburetor for all manufacturers on a stock cast iron 2 barrel intake manifold. Removal of the choke assembly is allowed. The choke horn stays. Holley jets permitted.

  8. Stock style mechanical water pumps only. No electric water pumps permitted.

  9. NO antifreeze allowed in coolant.

  10. No porting or polishing of heads or intake.

  11. Max. 1" spacer between carb and intake manifold. Maximum of two (2) ¼" gaskets. Total allowed height ½". Spacer and gasket combined height not to exceed 1½” .

  12. Two throttle return springs mandatory. Fuel filters must be steel, no plastic or glass allowed.

  13. Air cleaner mandatory. Any size filter. Open topped air box exiting to cowl permitted. Ram tubes or ducting allowed.

  14. Rear opening hood scoops allowed.

  15. GM engines - Max. 1.94" intake valve and 1.50" exhaust valve. No angle plug, Bow-tie, Vortec.

  16. Ford engines- Stock Cast iron heads only. No 4bbl. Cleveland or GT-40 heads.

  17. Chrysler engines- Stock cast iron heads, No W-2 heads.

  18. All heads must use stock diameter valve springs with no alterations to the spring pocket.

  19. Absolutely no modifications to cylinder heads, such as porting, polishing, port matching; roller rockers or angle milling.

  20. Must be maximum 1.5 rocker ratio.

  21. G.M. double Bump heads allowed.

  22. Screw in studs and guide plates are allowed.

  23. Stock style steel rockers only.

  24. No roller rockers or roller tipped rockers permitted.

  25. No roller lifters allowed.

  26. No stud girdles allowed.

  27. Any flat tappet, hydraulic or solid camshaft allowed as long as the 1.5 rocker ratio remains. No mushroom or roller cams.

  28. Two (2) or four (4) valve relief flat topped pistons only. Must be stock appearing. Cast, Hypereutectic, or forged pistons allowed. No light weight, thin walled wrist pins. Pistons must run one piece 5/64 inch thick top ring and second ring. Rule does not apply to standard bore dished piston short blocks. Part numbers to follow. Contact tech man for details.

  29. Piston clearance to be minimum .000 below deck.

  30. Any wet sump oil pan allowed that does not sit lower than the cross member. No crank scrapers.

  31. After market vibration damper and pulleys allowed.

  32. Stock production cast iron exhaust manifolds only allowed. No Corvette 2.5" center dump manifolds permitted.

  33.  

  34. Spec headers allowed: 

    • SCH-185 72-87 Malibu/Monte/GP/Cutlass/Regal.

    • SCh-185M 70-81 Camaro same as 185, but fits stock manual clutch linkage. “One tube on right side may be altered to clear upper A-arm”

    • SCH-115 67-69 Camaro/68-74 Chevy 2-Nova.

    • SCH-165 70-81 Camaro/75-79 Nova/64-77 Chevelle/72-77 Monte.

    Other headers allowed as long as it matches or is less than the above header specifications.

  35. All cars must have mufflers. H-pipes allowed, No X-pipes.

  36. The pipes may pass through the drivers’ compartment as long as they are shielded from the driver with 22ga sheet metal. The firewall and passenger floorboards may be altered only enough for the mufflers/piping to fit.

  37. All cars must have working starters, no push starting.

  38. Radiator must mount in front of the engine. Aluminum radiators allowed.

  39. Radiator must have a minimum 2 litre overflow catch can.

  40. Electric fans permitted. Fan must have an ON/OFF switch and be fused.

  41. No electric fuel pumps

Suspension

  1. Front and rear suspension must mount in the stock locations with no alterations. No Camaro/Firebird front clips allowed on any other car except total stock unibody, rear suspension and body Camaro or Firebird.

  2. No aluminum suspension or steering components permitted.

  3. The upper control arm shaft called "The Problem Solver" is allowed.

  4. Also, upper control arms may be of the tubular design, but must remain in stock location, and have the part numbers listed below, or equivalent;
    Metric cars:

    • Keyser/Port City 100-06-0800 RHS-1 8” Right, non slotted shaft

    • Keyser/Port City 100-06-0820 LHS-1 8.5” Left, non slotted shaft

    • Or

    •  

    • ALL57830 Right hand with steel cross shaft

    • ALL57831 Left hand with steel cross shaft

    • ALL57832 Right hand with aluminum cross shaft

    • ALL57833 Left hand with aluminum cross shaft

    Camaro & Nova

    • Lefthander 001-687 8¾” right – non slotted

    • Lefthander 001-695 9½” left – non slotted

    Or equivalent, subject to tech approval. All part numbers must remain intact, alterations or removal of part number, makes the part illegal.

  5. Upper control arm mounts can not be moved to gain camber.

  6. Rear trailing arms may be boxed, mounts may not be altered on frame or trailing arms.

  7. No Panhard bars.

  8. All cars must have a skid plate under the right front control arm. This plate must be lower than the brake rotor.

  9. Steel control arm and trailing arm bushings permitted. Trailing arms may have bottoms boxed for reinforcement.

  10. One shock per wheel. Heim-end shocks allowed. Front shocks may be relocated outside A-arm. Rear shocks to be mounted in stock location. Racing shocks permitted. No aluminum, adjustable or rebuildable shocks permitted.

  11. Racing springs may be used.

  12. Spring spacers allowed but no metal wedges in springs. Rear weight jacks allowed.

  13. Lowering blocks allowed on leaf springs. Rear leaf spring sliders permitted. Rear mounted only. Leaf springs must mount the original way they came from the factory.

  14. Minimum 6” ground clearance to the bottom of the frame rails. Uni-bodies measured at the door sill, with a secondary reference point of 4” at the bottom of the sub-frame where it mounts to the floor. Measurements taken with the driver in the car.

  15. Stock front steering components (idler arms, steering box, tie rods, drag link, etc.) Aftermarket centerlink for metric cars allowed.

    • AFCO #30271 improved geometry centerlink (only one allowed). Part number must 
      remain intact.

  16. A bigger or heavy duty type steering box may be used if it bolts to the stock location.

  17. After market fabricated steering column recommended.

  18. Bigger front spindles allowed but MUST BE OEM. No aftermarket spindles allowed. No OEM drop spindles permitted.

  19. Steel or heavy duty rotor required on the right front. P/N AFCO 9850-6501.

  20. Sway bars must be OEM and must mount in the stock location. Front sway bar can only be adjustable at the control arm mounting point.

  21. Car must weigh NO LESS THAN 3200 LBS. at any time, with driver.

  22. Lead ballast must be bolted to the frame or cage with two ½" bolts and lock nuts (Double nuts is acceptable alternative). All ballast must be painted white with your number clearly visible. All ballast must be visible to tech. inspector.

  23. Weight allowance 55% Left side max., 47% Rear max., with driver all day.

Tires/Wheels

  1. Must use a heavy duty racing type wheel. No stock rims permitted.

  2. Wheels can not exceed 8" in width.

  3. No aluminum rims.

  4. Aftermarket wheel studs and nuts recommended.

  5. The tire and rim shall not extend more than 4" outside the body.

  6. Max. 2" wheel offset.

  7. AR P265 or Hoosier 970. No tire softeners.

  8. Four (4) new tires allowed for first race day. Must be stamped by tech man. One (1) new tire allowed on each subsequent race day.

  9. No wheel spacers allowed.

Drive Line

  1. Must have driveshaft hoop.

  2. Drive shaft must be painted white with car number clearly visible on it.

  3. No aluminum drive shafts permitted.

Roll Cage

  1. All cages will be teched. Cages must be securely welded to the frame and/or floor of the car. Minimum roll bar thickness is 1.5" diameter, 1.25" wall thickness or 1.75" diameter, .095" wall thickness.

  2. There must be four door bars on the driver's side and three on the passenger side. Driver's door bars must be tinned to protect the driver, minimum of 20 gauge.

  3. The roof bar can not be more than 6" from the out side of the roof on the passenger side.

  4. Rear upright must be cross braced.

  5. Front window bars can not be more than 6" back from the roof post.( "A" pillars).

  6. Front uprights must be connected by a dashboard bar.

  7. All cars are recommended to have an "Earnhardt Bar" in the center of the windshield area of the front roll cage. Must be made of either one ½" tube or two 1" bars 6"-12" apart.

  8. Must have minimum two (2) windshield bars, minimum 0.5" O.D.

  9. All cages will have an ankle bar on the left side.

  10. All roll cage bars within reach of the driver must be padded.

  11. All cars will have a safety approved aluminum racing seat mounted securely to the roll cage. Must be bolted down with a min. of 4 x 5/16 bolts on bottom, and 2 x 5/16 bolts across the top below the shoulder belt opening. All seats will have headrests. No fiberglass or plastic seats permitted.

  12. Rub rails allowed, must be within one inch of the body panel, ends cut capped, 1" x 2", 3/16" wall, bumper height.

Fuel Cell

  1. The use of a commercially manufactured fuel cell is mandatory. Must be contained in a container of not less than 22 ga. steel.

  2. Racing fuel allowed. No Alcohol racing fuels . No electric fuel pumps.

  3. Overflow check valve is required.

  4. No material other than the standard foam supplied by a fuel cell manufacturer is permitted.

  5. Fuel cell must be mounted between the frame rails and as far forward as practical. Must be securely mounted with a min. of two 1½" wide straps bolting it down. Any fuel cell over eight gallons must mount inside a cage constructed of min. 1" square tube (NASCAR type). Must have a min. of two 1½" wide straps bolting it in.

  6. Fuel cell must have a min. 8" ground clearance.

  7. All cars must have a nerf bar welded to the rear frame behind the fuel cell. The nerf bar must be at least the width of the fuel cell and extend up to the frame or a cross member on the sides. The nerf bar must hang at least two inches below the level of the bottom of the fuel cell. This bar must be constructed of a min. of 1¼" round or square tubing.

Transmission

  1. Any OEM manual or automatic transmission.

  2. Must have working reverse gear.

  3. Automatic transmission must have a steel, working torque converter weighing 39 lbs. In standard transmission applications, stock OEM type, single disc clutch and pressure plates with a min. 10" diameter clutch. Must weigh minimum of 39 lbs.

  4. Torque converter must mount to an OEM, steel flex plate with no alterations.

  5. All transmission coolers must be mounted either ahead of the front firewall in the engine compartment or behind the rear firewall. No coolers permitted inside the driver's compartment.

  6. All transmission lines must have either screw on fittings or double clamped over flared ends. Any transmission cooler lines running through interior of car must be metel or steel braided hydraulic hose.

  7. All cars with manual trans. must have a ¼" steel scatter shield top 180 degrees, or thick belting.

  8. All bell housings must have an inspection hole, a minimum of 1¾" in size on the lower passenger side of the bell housing, or be open at the bottom for clutch and flywheel inspection.

  9. No aluminum flywheels permitted. Stock OEM, steel flywheels only.

  10. No aftermarket flywheels permitted.

Rearends

  1. Stock working rear differentials only, welded rear ends and mini spools allowed.

  2. Rear differentials must be centered in the stock frame.

  3. Locked rear ends permitted.

  4. No Detroit Lockers permitted.

  5. No traction control devices of any kind permitted.

  6. Ford 9” rear differential conversions are allowed, but the differential must be centered in the stock frame. Shock angles to remain stock for the chassis, control arm angles must be stock. Altering of the mounting bracket length and location not allowed on installed differential. All mounting is subject to Technical approval.

  7. Stock replacement aftermarket axle shafts allowed.

Brakes

  1. All cars must have stock OEM brakes in good working condition on all four wheels.

  2. Lightening of backing plates, brake drums, discs, shoes or calipers by cutting, trimming or grinding metal is not permitted.

  3. No rear disc brakes permitted.

  4. Must use stock OEM type brake components only. Steel braided lines ok.

  5. Hi-performance, racing stock type brake pads permitted.

  6. You may use stock type OEM bigger spindles with bigger brakes. On metric cars, P/N AFCO 9850-6501 rotor required on right front, unless you have upgraded.

  7. No aftermarket spindles permitted. No drop spindles permitted.

  8. Ducting to the front brakes is ok.

  9. Brake bias valves allowed but must not be mounted within reach of the driver at all times. No bleeders.

  10. Stock OEM type master cylinders and brake pedals only. In stock location. No aftermarket brake pedal assemblies permitted.

Appearance

  1. Cars must be neatly painted with all exterior body panels. A damaged car, if it is safe to continue, will only be allowed to finish that race date. The car must be repaired before coming back to the track another race date.

Safety

  1. Refer to Safety rules for clothing, helmets, and other equipment.

  2. Batteries must be securely mounted to the frame or cage, not the floor. It must be sealed inside a battery box.

  3. All cars must run a quick disconnect switch within reach of the driver and/or within reach of safety workers. Switch must be clearly marked ON/OFF.

  4. Holes in the floor or firewall must be sealed with minimum 22 gauge steel.

    Rules are frozen for 3 more years, until end of 2020 season

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