117826786_3460449697340164_4604387192113

STREET STOCK RULES

2021 STREET STOCK RULES

 

Body

1.      North American Stock Production cars only. 

2.      Convertibles, & Station Wagons are not allowed.

3.      An aftermarket firewall and cockpit/floor pan may be used. Must be constructed minimum 20-gauge magnetic steel. 

4.      Must retain stock driveshaft tunnel, floor can be raised on right hand side no higher then the top of the driveshaft tunnel to allow clearance for exhaust.

5.      All bodies must utilize factory stock or same as stock replacement: steel roof, quarter panels, front fenders, & hood. Skinning of hood & fenders is allowed. Composite bodies allowed.

6.      Aftermarket doors, trunk lid, nose cone, & tail cones are allowed. 

7.      Cars Should look as Stock to their make and model as possible.

8.      Front & Rear Firewalls, as well as floor boards must be completely sealed for Fire Safety. 

9.      Glass windows must be removed. Minimum 3/16 Lexan must be used, covering full area, with sufficient bracing to prevent deflection.

10.    Quarter Panel windows are allowed

11.    Rear windows are allowed. Must be clear. No tinting. 

12.    Side windows are allowed, but must be a maximum of 12”long, measured from the intersection of the A-post and door. 

13.    1” x 2” Rub Rails are allowed. Each end must be tapered and have a welded cap. 

14.    Rear spoiler is allowed. Max 6 ” tall, 60.5” wide.

15.    See G-Body Dimension Sheet

 

OEM Frame/Chassis

1.      Cars may utilize a North American Stock Production frame/chassis (1965 or newer) 108” Minimum wheelbase. 

2.      Stock unaltered OEM frames with original OEM suspension mounting locations ONLY. Wheelbase must remain Stock unaltered for frame being used. 

3.      Minimum 6” Frame Height for Metric cars, 5” for Camaro. Measured to the bottom of the frame at the body mount holes. Driver out of car.

4.      All cars must use a stock transmission crossmember in stock location. Notching for exhaust pipe clearance is allowed.

5.      Stock C-channel frame extending from front to rear clips on full frame Cars may be boxed or connected from side to side with an “X”.

6.      Uni-body cars may install subframe connectors. Minimum 2” x 3” 0.120 wall tubing

7.      Fabricated rear clips are allowed on coil spring cars, Front and rear spring mounts must remain at stock datum points.

8.      Jacking bolts are permitted.

 

 

Suspension

1.      Steering must use stock-type tie rod, adjustable sleeves are permitted, aftermarket centre link steering arm, pitman arm, and idler arm are allowed. 

2.      All lower control arms must remain stock. (Front & Rear)

3.     Tubular upper control are permitted. 

4.     Replacing upper control mount on chassis is permitted but MUST be in stock location.

5.      Offset (problem solver) Cross shafts are allowed in upper control arms.

6.      Spindles must be stock.

7.      Left and right side spindles must be the same.

8.      No fabricated spindles or modifications allowed 

9.      Same as stock replacement Urethane bushings are allowed. No steel bushings.

10.    Stock dimension replacement ball joints are allowed.

11.    Screw-in ball joints are allowed.

12.    No bump stop devices are allowed.

13.    Springs:

a.      Must remain in stock location.

b.      Steel racing springs are allowed. 

c.      Coil springs must be a minimum of 5” diameter.

d.      Adjustable spring spacers are allowed.

e.      Adjustable leaf spring shackles are allowed.

f.       Lowering blocks are allowed.

Shocks:

  1. Racing shocks are allowed. 

  2. Recognized manufacturers will be AFCO, PRO, & INTEGRA

  3. Maximum allowable valving stiffness is a 7. 

  4. Maximum 1 shock per wheel. 

  5. Steel body only. No remote reservoirs.

  6. Must be a Non-adjustable, Non-rebuildable, sealed shock.

  7. No high pressure gas shocks.

  8. Relocation of shocks is allowed.

  9. Mounting of shocks through the upper control arms is permited.

15.    Sway bars:

a.      Must mount in stock location, One piece bars ONLY.

b.      Adjustable sway bar links are allowed.

 

Brakes

1.      Front Calipers must remain stock for spindle being used. After Market racing single piston Calipers are allowed.

2.      Rotor/Hub must be Stock or same as Stock replacement. ⅝” Wheel studs and 1” lug nuts are mandatory. Thread on Studs must completely pass through Lug nuts.

3.      Rear drum brake shoes and drums must remain stock.

4.     Rear Disk brakes are permitted, MUST be a single piston GM style caliper installed on a floating 9” Ford rear end assembly. A 50 lb weight penalty for running rear disk breaks for 2021 season only.

5.      Master cylinder must be stock. Multiple master cylinders are NOT allowed.

6.      Proportioning valves are allowed.

7.      Steel braided flex brake hoses are allowed.

8.      No aluminum brake parts are allowed.

 

CONSTRUCTED FRAME/CHASSIS

 

  1. Any constructed chassis permitted but must use: 2012-Present Super Stock chassis must use 71-81 Camaro pickup points and measurements on both the front and rear. ➢ All newly constructed vehicles must conform to measurements as listed.

  2. 2012-Present Super Stock Chassis measurements/requirements:

1. Wheel base 108”

2. Maximum track width is 75”

3. Maximum roof height is 48”

4. Rear quarter panel height 35”-37”

5. Stock front clip, attached to centre section at 90 deg, No Chassis offset permitted

6. Lower ball joint to center section 24” 7. Center section frame width 57”- 60” 8. LF Shock to “A” pillar 35”

7. “A” pillar to “B” pillar 45”-48”

8. Minimum top of frame to halo 38”

9. Minimum halo width 46”

10. Minimum door bar height from top of frame 22”

11. Each side will have 4 door bars

12. Minimum side to side door bar width 70”

13. Antiintrusion plates must be securely welded to the outside of the left side door bars. This plate must be formed to    match the curvature of the door bars, and the fill the area between the horizontal centre lines of the top and bottom door bar. This plate will be manufactured of 16 gauge (0.0598 inch thick) and cannot be inset anymore than 1⁄4 inch from the tangent or outside surface of the door bar.

14. Must have center windshield bar

15. Must have center halo bar

16. Rear clip width 36”-38”

17. Transfer bar from rear B pillar cross bar to RF frame mandatory

18. Camaro rear leaf springs only and must be mounted in stock location.

19. Rear clip to be constructed of 2X3X.095 tubing.

20. Both the front and rear bay bars must be in line with the top door bars.

21. Drivers foot box must incorporate intrusion protection bars

22. Front passenger firewall even with front bay bar

23. Dash panel complete from “A” pillar to “A” pillar

24. Dash panel complete from top of cross bar, 90 DEG bend, level with base of cowl

25. Rear firewall to extend up from frame to top bay bar and extend to base of rear window

26. Sheet metal in driver’s area must be welded, passenger side maybe riveted. All interior sheet

      metal must be constructed with magnetic steel

27. Two windshield support bars required on passenger side

28. Hood hinges not required, Minimum of 4 pins across both front and cowl

29. Trunk hinges not required, Minimum 4 pins across cowl and 2 across the rear

30. Minimum 1/8” floor plate on drivers side from firewall to “B” pillar

31. Minimum foot box width 15”

32. Minimum distance between foot box and centre of shock 20”

33. Maximum drive shaft tunnel and passenger floor height 10”

 

Transmissions & Rear ends

General:

a. All Driveline components must be Stock, or approved stock replacement.

Steel driveshafts only. Universals may be changed to work with ford 9” rear end.

Automatic Transmissions:

  1. Must be a stock production transmission with stock gear ratios.

  2. Functionality must remain stock.  

  3. Removal of any gears including reverse is not allowed.

  4. Stock operational torque converters only.

  5. Torque converters must be a minimum of 11” diameter.

  6. Oil coolers are allowed.

 

 

Standard Transmissions:

  1. Must be a stock production transmission with stock gear ratios.

  2. Functionality must remain stock.  

  3. Removal of any gears including reverse is not allowed.

Clutch:

  1. Must be stock style & weight.

  2. Flywheel must be stock, unaltered, & a minimum of 10.5” diameter.

  3. No exotic clutch kits

  4. Hydraulic or mechanical release bearings are allowed.

  5. Bellhousing must be a Steel scattershield.

  6. .A fabricated 3/16” steel 180 degree shield around a cast bellhousing will also be allowed.

Stock Rearends:

  1. Rearend housings must be unaltered stock.

  2. Rearend housing must be stock for frame being used.

  3. Fabricated spring & shock mounts are allowed.

  4. Must use stock style (rubber or urethane) bushings in housing. NO steel.

  5. Rearends must be Open (operational spider gears), or locked. 

  6. Mini Spools are allowed.

  7. “C” clip eliminators are allowed.

Ford 9” Rearends:

  1. Ford 9” Rearends are permitted 

  2. Rearend housing must remain as produced. Alterations are not permitted. 

  3. 3rd Member/Gear set must use a stock steel case & spool. NO LOCKERS

  4. Lightweight axles are not permitted.

  5. Must use stock style (rubber or urethane) bushings in housing. NO steel.

  6. 3 link Rearends are NOT permitted.

 

Weights

  1. 3200lbs. Base weight minimum at all times, including after the race with driver (no refueling after the race)

  2. STOCK Metric Cars with stock everything, we mean STOCK (body, firewall, suspension,

  3. …..) will receive a 150 lbs weight break.

  4. Races longer than 50 laps will have a ½ lbs. per lap over 50 laps allowance.

  5. 55.0% Maximum left side weight at all times.

  6. 48.0% Maximum Rear weight at all times.

 

Electrical

1.      Batteries must be securely mounted in an angle iron or equivalent base utilizing a bolt on clamp style mount to hold battery in. 

2.      Marine style battery boxes are mandatory if the battery is mounted in the driver compartment.

3.      All cars must have a Battery master disconnect On/Off switch mounted to the right OR left rear side of the main cage/main hoop. It must be clearly marked On/Off. The disconnect MUST be used to break power in the positive battery cable, not the negative. 

4.      All cars MUST be wired in a manner that if the Battery disconnect switch is turned off the car will not continue running. 

 

Tire & Wheels

1.      Maximum 8” wide steel racing wheels only. No stock or homemade wheels.

2.      Wheels must have a Minimum 2” backspace.

3.      Bleeder Valves are not allowed.

4.      Maximum of ½” wheel spacer per wheel is allowed.

5.      AR P265 Tire is mandatory. 

6.      Altering of Tires in any manner to obtain a performance advantage is NOT allowed. NO exception

 

Fuel

1.      A commercially manufactured fuel cell is mandatory. Max 22 US gallons

2.      Must be specifically designed and manufactured for racing. 

3.      A minimum 20- gauge steel fuel cell container is mandatory.

4.      Rollover/check valve balls are mandatory on all tank lines.

5.      Cell must be mounted between the rear frame rails of the chassis, no lower than 8” from the ground.

6.      A square tubing cage, or equivalent angle iron & flat bar mounting system is mandatory.

7.      A fuel cell protection bar is mandatory.

8.      Pump or Race fuel only. No alcohol or exotic fuels. 

9.      Any mechanical fuel pump allowed. No electric pumps. 

 

 

Engine Rules

 

Penticton Speedway Highly Recommends running the 602 crate program. In 2022 the 602 crate will no longer use a restrictor plate and in 2023 will have a 100 lb Weight Break. 

 

MSD Rev Limiter:

  1. All engine packages must utilize a MSD part #8278 rev limiter with a RPM chip.

    1. GM Crate Engine - 6000 RPM

    2. Built Engine - 6500 RPM

    3. All wiring for rev limiter must be clearly visible and traceable for tech.

    4. Must function at all times. No exceptions. 

 

Package A - Built Engines. 

  1. General:

    1. Unless specifically identified in these rules all parts must be automotive OEM Stock or OEM replacement for engine being run. 

    2. Marine parts are not acceptable replacements for automotive OEM stock.

    3. GM, FORD, & CHRYSLER performance racing parts are not acceptable replacements for automotive OEM stock.

    4. Two side by side Intake Manifold bolts must have pre-drilled heads for Tech to install a seal. 

                                          5.         Engine must be Corporation to Corporation with chassis being used and MUST be mounted in stock location. 

                                          6.         Any steel wet sump oil pan is allowed.

 7.         Solid Motor Mounts are permitted

Engine Blocks:

  1. Cylinder deck may be machined for cleanup and truing only.

  2. Zero decking is not allowed.

  3. No lightening or altering of engine blocks.

  4. Aftermarket steel Main caps are allowed.

  5. Camshaft tunnel must remain of stock dimensions.

  6. Displacements are as follows: (bore x stroke + overbore = Max Displacement)

    1. Chev 350 c.i.             4.00" x 3.48"             +                .060"         =               360 c.i. MAX

    2. Ford 351 c.i.              4.00" x 3.50"             +                .060"         =               363 c.i. MAX

    3. Chry 340 c.i.              4.04" x 3.313"           +                .060"         =               350 c.i. MAX

    4. Chry 360 c.i.              4.00" x 3.578"           +                .030"         =               364 c.i. MAX

  7. Lifter bores must remain stock size:

    1. Chev 350 = .842"

    2. Ford 351 = .874"

    3. Chry 340 = .904"

    4. Chry 360 = .904"

  8. Steel timing chain and gears only. 

c.      Camshafts & Lifters:

                                           i.         Hydraulic or solid flat tappet Camshafts only.

                                          ii.         Hydraulic or solid flat tappet lifters only.

                                         iii.         Anti pump up lifters are allowed

                                         iv.         Lifter diameters must remain stock for engine block being used.

 

d.      Crankshafts: 

                                           i.         Stock OEM or aftermarket Stock Style replacement crankshaft, minimum weight 48.5 lbs, are allowed. 

                                          ii.         Stock stroke must be maintained.

                                         iii.          No strokers or lightweight cranks allowed. 

                                         iv.         Recognized part #’s are as follows:

1.      Scat 4-350-3480-5700 

2.      Scat  9-10442

3.      Eagle 4305348057sp* 

4.      Eagle 435034805700 

5.      Eagle 103503480(CM) 

                                          v.         If you choose to use a crankshaft other than one of the recognized Part #’s provided, it is your responsibility to present it to Penticton Speedway Management/Tech for approval BEFORE use.

e.      Connecting Rods: 

                                           i.         Stock OEM or aftermarket replacement rods are allowed. 

                                          ii.         Eligible aftermarket Part #’s:

1.      Eagle SIR5700BBLW

2.      Eagle SIR5700BPLW 

3.      SCAT ICR5700P 

4.      SCATICR5700 

                                         iii.         OEM rod length must be maintained at all times. 

                                         iv.         No lightweight aftermarket rods allowed. 

                                          v.         Balancing of rotating assemblies is allowed. No removal of serial numbers or manufactures emblems.

f.       Pistons:

                                           i.         Flat top or Domed pistons are allowed.

                                          ii.         Maximum 0.125 dome allowed.

                                         iii.         Flat top pistons must be used with cylinder heads having a chamber size less than 74cc

                                         iv.         Domed pistons may be used with cylinder heads having a chamber size of 74cc or greater.

                                          v.         Maximum Compression ratio 11:1 

g.      Cylinder Heads: 

                                           i.         Vortec heads are not allowed.

                                          ii.         Unaltered stock cast iron O.E.M. production cylinder heads only. Cylinder heads showing any signs of alteration in anyway other than outlined in the rule book, will be deemed illegal.

                                         iii.         Machining for screw in studs and guide plates is allowed. 

                                         iv.         Opening of push rod slots in cylinder heads is allowed. 

                                          v.         Steam relief holes may be drilled to a larger size. Multi angle valve job permitted. 

                                         vi.         New valve seats are allowed. 

                                        vii.         No grinding or blending of bowl into bottom cut of valve job.

viii. No titanium or hollow stem valves.

ix.  Maximum Valve Sizes are as follows:

G.M. 1.94” intake 1.60” exhaust

Ford 2.04” intake 1.66” exhaust

Chrysler 2.02” intake 1.60” exhaust

x. Stock diameter replacement valve springs and retainers or Comp valve springs part #26981 with retainer part #787 hardened keepers are allowed.

xi. Rocker arms must be unaltered Stock or Stock replacement. No Roller Rockers of any kind.

Water Pump & Pulleys:

  1. Stock standard length water pumps only.

  2. Stock or aftermarket pulleys are allowed with max 30% reduction. 

Intake Manifold:

  1. Stock unaltered Cast iron 2bbl intake manifold only.

  2. Stock high rise/marine manifolds are not allowed.

Distributors:

  1. Stock style & functioning HEI distributors only. 

  2. MSD part # 8362 is the only aftermarket distributor allowed.

  3. Accel Module part # 35361 is allowed.

  4. Vacuum advance may be disabled or removed.

Carburetor:

  1. Stock unaltered 2bbl carburetors only.

  2. 1 11/16 inch max throttle bore size.

  3. Carburetor spacers are not allowed.

  4. Carburetor adapters are not allowed.

  5. An air cleaner is mandatory.

  6. Air cleaner base must be round and may not be any bigger than a 16” diameter.

  7. Ram air induction, fresh air ducting, cowl induction, or modified air cleaner bases are not allowed.

Exhaust:

  1. Stock unaltered cast iron exhaust manifolds or Schoenfeld part# 185 headers only, with 50lbs. penalty. 1 tube on passenger side is allowed to be altered.

  2. Maximum exhaust pipe size for cars using manifolds is 2.5”

  3. Exhaust pipe size for cars using headers can be up to 3”

  4. No crossovers, H-pipes, merge collectors, or merge pipes.

  5. Recommended Mufflers are as follows:

    1. 2.5” Hooker part # 21602

    2. 3” Hooker part # 21605

Alternators & Power Steering Pumps:

  1. Alternators and power steering pumps are not mandatory.

  2. Any alternator is allowed. Must be driven off the front of the engine.

  3. Stock or aftermarket cast steel power steering pumps are allowed. Must be driven off the front of the engine. 

 

GM Circle Track 602 Crate Engine 

General:

  1. The GM 602 part #88958602 or #19258602 are the only crate engines allowed. 

  2. GM part # 14088765 counter balanced flex plate is suggested.

  3. Penticton Speedway reserves the right to take any crate engine at any time and replace it with a new one. 

  4. Crate engines must remain sealed at all times. Rebuilds are not allowed. 

  5. At any time in tech Pentiction Speedway may remove the Gm seals to inspect the engine and replace them with Penticton Speedway seals.

 

  1. Exhaust:

    1. Schoenfeld part# 185 headers only. 1 tube on passenger side is allowed to be altered.

    2. Exhaust pipe size can be up to 3”

    3. Dual exhaust with 2 mufflers is mandatory.

    4. No crossovers, H-pipes, or 2 into 1 systems. 

    5. Recommended Mufflers are as follows:

      1. 3” Hooker part # 21605

  2. Carburetor:

    1. Holley Part # 01-80541-1 & Quick Fuel Part # Q650CT 650 CFM Crate engine Carbs only.

    2. A restrictor plate is mandatory.

      • 1” restrictor plate is Mandatory for 2021 only.

      • Must be purchased from Penticton Speedway or Alien Race Cars (1-250-477-8444)

      • At any time restrictor plates can be swapped among competitors or be replaced with a same size plate.

    3. An air cleaner is mandatory.

    4. Air cleaner base must be round and may not be any bigger than a 16” diameter.

    5. Ram air induction, fresh air ducting, cowl induction, or modified air cleaner bases are not allowed.

  3. Distributors:

    1. Stock style & functioning HEI distributors only. 

    2. MSD part # 8362 is the only aftermarket distributor allowed.

    3. Accel Module part # 35361 is allowed.

    4. Vacuum advance may be disabled or removed.

  4. Valve Springs:

    1. Replacements springs are allowed. Must be one of the following Part #’s:

      1. GM Performance #10212811

      2. Elgin #RV943xs - Inner springs must be removed.

  5. Water Pump & Pulleys:

    1. Stock standard length water pumps only.

    2. Stock or aftermarket pulleys are allowed. 

    3. Aftermarket reduction pulleys are allowed with max 30 % reduction.

  6. Alternators & Power Steering Pumps:

    1. Alternators and power steering pumps are not mandatory.

    2. Any alternator is allowed. Must be driven off the front of the engine.

    3. Stock or aftermarket cast steel power steering pumps are allowed. Must be driven off the front of the engine. 

 

 

Please contact Penticton Speedway Tech through our website if you have any questions.

Racetrack Links
CONTACT US
Our Partners

2070 Carmi Avenue,

Penticton, BC, Canada

We couldn't do what we do without all of our amazing sponsors and partners. Click on the link above to visit our sponsors page and make sure to stop by and pay them a visit!

Copyright ©2018 Penticton Speedway All Rights Reserved.