Hobby Stock Division


Bubba Raceway Park – Florida Hobby Stock Rules

Rule Book Disclaimer:

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. NO EXPRESS OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM THE PUBLICATION OF OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. They are intended entirely as a guide for the conduct of the sport and in no way guarantee against injury or death to any participant, spectator or official.

The Race Director or Heat Tech Inspector shall be empowered to permit reasonable and appropriate deviation from and of the specifications herein or impose any further restrictions that in their opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM THE PUBLICATION OF OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. Any interpretation or deviation of these rules is left to the discretion of the officials and is final and binding.

On occasion when situations arise that are not covered by written rules herein, special rulings may be put into effect by the track officials. Once such rulings are acted upon, they may become an act of policy and will be added to the existing rules of procedures.



  1. If it is not stated in the rules it doesn’t mean it’s approved. Please consult with tech official for approval.
  2. All Tech decisions are final. The track reserves the right to add weight to any driver in the fairness of competition.
  3. You need to understand and comply by all safety rules and requirements.
    1. Track Management as well as the Tech Official reserves the right to disqualify any car and/or driver that does not comply with all safety requirements. Competition will not and cannot come before safety.


  1. Track Officials may inspect any car and equipment at any time for compliance.
  2. No Radios or audible communication devices except raceceiver. Must have protection bars in front of driver.
  3. All cars must have an extensive safety inspection each season before they race. All required safety equipment and apparel must be in use while the car is on the track. Racing helmet with minimum Snell SA2005 rating. Neck brace or Hans device recommended. Please see weight break. (Hans device or equivalent required for minor.)
  4. Fire suit with SFI minimum rating or “1”. No holes or torn fire suits allowed. Fire resistant gloves, shoes and socks must be worn at all times when car is on track.
  5. A minimum four-point roll cage. Must be steel pipe or tubing, a minimum of 1 ½” (1.50”) outside diameter with minimum of 0.095” wall thickness. No square tubing or galvanized pipe allowed. Front and rear down bars allowed. Minimum of 4 bars on driver’s side and 3 on passenger side.
  6. Roll bar padding recommended around driver.
  7. All cars must have a minimum of 2lb. fire extinguisher with a working a visible gauge securely mounted with in drivers reach. (Highly recommended complete fire suppression system.)
  8. Window nets are required on the driver’s side of the car and must be securely mounted. Window net must be operational from both inside and outside of car. Drivers must be able to exit both sides of car.
  9. Aluminum racing seats are mandatory. A single quick release 5-point harness (minimum 3” belts) less than 5 years old is required in all vehicles. All required belts must be in use anytime the car is on the track. Racing harness must be attached to the roll cage.
  10. Drive shaft must be painted white and include car number. Drive shaft loop will be a 5” diameter steel loop. At least 1” wide and ¼” thick. It must be securely mounted to the frame, 12” from front of universal. Must have one on the rear of drive shaft also.
  11. All lead ballast must be painted white with car number on it. Up to 50lbs of lead must be securely mounted with a minimum of one ½” bolt. 50lbs or more must be securely mounted with a minimum of two ½” bolts. It is your responsibility to make sure your ballast stays in your car for everyone’s safety.
    1. Penalty weights must be painted red or orange.
    2. If weight falls off of your car onto the track at any time, you will be immediately disqualified from that event.
  12. All cars must have front and rear hook ups for towing.


  1. Any American made 1970 thru current year production car. No front wheel drive, compacts, foreign cars, trucks or convertibles.
  2. Firewall and floorboards must be steel.
  3. Trunk must be sealed from driver’s compartment.
  4. Must have stock frame to middle of rear end.
  5. Rear spoiler 8” X 60” or 5” X 72” permitted. Spoiler sides must be same height as spoiler. No longer than 18.5” measured at base.
  6. Rear bumper covers are optional.
  7. No radios. No Mirrors. Must have protection bars in front of driver.
  8. Steel or aluminum body.
  9. 72” maximum rear deck width. (Recommended any new builds or bodies make rear deck no wider than 64”) Required for 2018-64” maximum rear deck width.
  10. Aftermarket nose okay. No sloped or late model noses.
  11. Nesmith street stock/AR Bodies approved-Does not have to match Chassis-May run AR style Camaro, Mustang or Challenger body.
  12. 40” rear deck height, measured at base of spoiler on ALL bodies. 1” tolerance after race.
  13. Sail panels/B-Pillar must not protrude above roof, must be the same on both sides and not longer than 34” front to back measured horizontally. If windows are cut out, must be cut out on both sides.


  1. Minimum 101” wheelbase. 1” tolerance, measured centerline of front wheels to centerline of rear wheels.
  2. Wheelbase and frame must be stock to year, make and model chassis being used.


  1. No shortening, chopping or channeling.
  2. Johnson Metric Fabricated frame allowed with OEM rear lower control arm option only. Includes front fabricated Lower control arms. If either or both is used must run an additional 50lb weight penalty in front of flywheel (50lb weight must be split into 25lbs on each side of engine within length of engine.)

Front Suspension:

  1. May relocate top of A-frames. Tubular upper control arms okay. Component or strut type assemblies permitted. Aluminum cross-shafts okay. Stud type aftermarket ball-joints okay-any length.
  2. May run wedge bolts or spring cups in front and rear. One spring per wheel. 5” minimum diameter coil spring. Must mount in original location.
  3. Any steel non-adjustable shock. No Schrader valves. No bulb end/expanded chamber shocks. Concentric body only. Must not be able to adjust pressures at track. One shock per wheel. No Aluminum, No Canister shocks. ($200 claimer per shock, must provide your same located shock for exchange. Cash only)
  4. Lower control arms and mounts must remain stock to frame being used and unaltered. May use steel, rubber or polyurethane bushings. No offset bushings.
  5. Metric cars may use Johnson Chassis tubular lower control arms (JCI-09-02-01RC-L-B and JCI-09-02-01RC-R-B) with an ADDITIONAL 50lb penalty to be mounted ahead of flywheel (50lb weight must be split into 25lbs on each side of engine within length of engine.) Must use “0” slug in lower control arms. No offset bushings or slugs.
  6. Any stock type centerlink-No adjustable. May use steering quickner.
  7. Strut cars may use heims on top of strut.
  8. Cast spindles with steel hubs only-No tubular-No wide 5.
  9. May use hiem ends on inner and outer to replace tierods. Steel swedge tubes, heim ends, bolts and jam nuts only. No aluminum and no titanium. No Carbon Fiber.

Rear Suspension:

  1. Changing of springs allowed. 5” Minimum diameter coil springs. Coil for coil, leaf for leaf. No Chrysler leafs in a Camaro or Nova.
  2. Coil springs must be located over center of axle tube.
  3. Sliders, adjustable shackles, wedge bolts allowed on leaf spring cars. Rear wedge bolts on coil spring cars permitted.
  4. Lowering blocks optional. Adjustable lowering blocks okay.
  5. Leaf spring cars can use aftermarket bracket in rear of leaf spring only.
  6. Upper rear trailing arm may be lengthened or shortened to obtain correct pinion angle-May be adjustable. May use aftermarket upper trailing arms-NO heim ends.
  7. Lower rear trailing arms must remain within ½” of stock length to frame being used. May be aftermarket. No Hiem ends. May be offset or spherical bushings. No more than ½” tolerance from stock.
  8. May not change or alter stock trailing arm or Leaf spring mount location on frame.
  9. Any non-adjustable steel shock in relative stock location on rear. No Schrader valves. No bulb end/expanded gas chamber shocks. Concentric body only. 1 shock per wheel. No aluminum, No canister shocks. No coil overs allowed-any type. No coil over eliminators. Only one spring per wheel. ($200 claimer per shock, must provide your same located shock for exchange. Cash only)
  10. No wide 5 hubs.

Engine Rules:

  1. All Engines must be mounted in center of chassis. #1 spark plug must be in front even with centerline of upper ball joint.
  2. 2.Florida Hobby Engine:
    1. Optional Equipment:
      1. Valve covers, wind-age tray, cam button, air filter, oil pan, four bolt blocks, motor mounts, aluminum pulleys, push rods, timing chain & gears, rod bolts, balancing and blue printing okay. Any steel harmonic balancer approved.
    2. Cylinder Heads:
      1. Double hump/fuelie heads okay. No 461X double hump or angel plug. No porting or polishing.
      2. World heads GM #043610, #043600 1.94 intake, 1.50 exhaust. Ford #053030 1.94 intake, 1.50 exhaust.
      3. RHS heads #12402 or #12400. Engine quest part #EQ-CH350I
      4. Dart heads #10021171, #10024361A, #10024365 & #10024365A
      5. Dart heads #10021070, #10024361 or #10024360 Mopar, #p5007145 or OEM 1.92 intake, 1.625 exhaust.
      6. No GM 202 heads. No Vortex heads.
      7. Milling of heads permitted. No angle cutting.
      8. Screw in studs, guide plates, stud girdles and poly locks permitted.
      9. Valve springs must be stock configuration and specs of engine. 3-angle valve job permitted.
      10. 1.270 o.d. maximum valve spring diameter.
      11. 1.5 ratio roller rockers allowed. Stud girdle allowed. No shaft mounts. No 1.6 ratio.
    3. GM 350, Ford 351, Mopar 360 C.I.D. .060 plus wear. No Clevelands.
    4. Flat tappet camshaft and lifters only. Lifters must be stock diameter.
    5. Exhaust:
      1. Headers permitted. No TRI-Y headers. Mufflers allowed.
    6. Intake Manifold:
      1. Stock OEM, Edelbrock Torker or Performer only (Part #’s 7101, 2701, 2101) No air gap intakes.
      2. No Victor Jr. manifolds, no marine manifolds or any other high performance manifolds allowed.
    7. Pistons & Rods:
      1. Any sportsman Chevy 5.7 rods. Ford 6.0 rods. No H beam rods, floating pin okay.
      2. Any flat top or dish piston. No dome tops. Piston must not protrude above cylinder deck surface.
      3. No aluminum rods.
    1. Crankshaft:
      1. GM 3.480” stroke, Ford 3.50”. No knife edge, may balance. No grinding on any part of crankshaft. Must have a legible part number, if there is no part number it will be deemed illegal.
      2. Cast crank 48lb minimum and steel crank 51lb minimum. NO TOLERANCE

3.Crate Engine:

    1. GM part number 88958602/19258602
    2. These engines are sealed at the intake manifold, cylinder head, front cover, and oil pan with special twist off bolt heads originally from manufacture. Original GM seal bolts.
      2. The sealed engines must remain intact and not be tampered with. Any seals that have been removed or tampered with will make the engine illegal and not eligible for competition. The penalty for anyone tampering with seals, Modifying any internal engine parts, or changing the parts from stock as delivered seals from the factory or approve builder will be subject to driver and owner of car being disqualified from that event and/or expulsion from racing with the track for the remainder of the season and into next season in near end of year.
      3. No changes are allowed to the engine including the intake manifold, heads, valve covers, front cover, oil pan, harmonic balancer or any other part(s) on or in engine.
      4. No vacuum pumps
      5. All crate engines must remain stock as they came sealed from the factory and/or certified/approved engine rebuilder. Crate engines must not be altered, modified or changed from factory specs.
      6. May run any Holley style 4bbl carburetor with no more than 1.250” spacer including gasket.
      7. No belt driven or electric fuel pump.

4. Open Engine Option:

    1. Any small block engine with 2.02 valves, vortech heads and or cubic inch exceeding 362 c.u. must run with a gauge legal 500 cfm 2 bbl Holley 4412 carb. (Spacer not to exceed 1.625 including gasket.)
    2. Steel block and steel heads only-No porting or polishing.
    3. Any intake-No porting or polishing.
    4. Stud mount rockers only.
    5. No stud girdles.
    6. Stock diameter valve springs only-1.250” maximum o.d. (beehive spring allowed 1.310 maximum o.d.) No double valve springs. Any manufacturer (chevy, ford or dodge.)
    7. Any steel, non-ported/polished cylinder head.


  1. Open Engine
    1. Must run Holley 4412 cfm 2 barrel, must pass NO-GO gauges. No grinding or polishing. Must have choke horn. Must remove choke plates. May change jets and power valve. May use billet parts.
    2. Max carburetor adaptor or spacer is 1.625 including gaskets.
  2. Florida Hobby Engine carburetor option:
    1. May run Holley 4412 cfm 2 barrel, must pass NO-GO gauges. No grinding or polishing. Must have choke horn. May remove choke plates. May change jets and power valve. May use billet parts.
    2. May run 1850 Holley cfm, vacuum secondary only. May change jets and power valves. Center hung float bowls, fuel log and quick change secondary spring pod approved. Must pass NO-GO gauges. May run secondary metering block.
    3. Max carburetor adaptor or spacer is 1.625 including gaskets.
  3. Crate Engine:
    1. May run any Holley style carburetor with no more than a 1.250 spacer including gasket.
  4. No electric fuel pumps.
  5. No vacuum pumps.


  1. Aftermarket ignition allowed. May have aftermarket high performance module with printed circuit board on HEI. No traction control. May run soft touch Rev Control. Must not be within reach of driver.
  2. MSD Allowed. No traction control. No magnetos. No crank triggers.


  1. Any steel flywheel (Must weigh no less than 14lbs with bolt) and single disc stock style diaphragm clutch assembly. Min 10 ½”. No Aluminum Parts. Clutch disc must be full circle. May use solid hub clutch disc. No Puck style. Steel Bell housing only.
  2. If using multi disc option must have steel flex plate/flywheel and can run Aluminum Bell housing. Triple disc okay. No reverse mount starter.


  1. Steel GM style calipers only, No aluminum, No dual piston calipers. No scalloped rotors. No drilled rotors. No grooved rotors. No titanium, aluminum, carbon fiber or exotic material rotors. Must be mounted solidly-No brake floaters.
  2. Dual master cylinders allowed. May be adjustable from the driver’s compartment. May have RF brake shutoff within driver’s reach.


  1. Any radiator, must remain in stock location. Water only for coolant.


  1. Must be stock type with forward and reverse operating.
  2. When utilizing Bert/Brinn/Falcon internal tranny clutch option you must use standard style block mount starter. No reverse starter. Aluminum bell housing allowed. No ball spline.


  1. Must be painted white. Must have safety hoop. No ball spline.

Rear End:

  1. Interchanging of rear ends, gear ratios and locking permitted. NO quick change.
  2. Trailing arm brackets may be aftermarket. May have multiple holes. Ford 9-inch floater rear end okay.

Wheels & Tires:

  1. 8” wide steel wheels max. May run 10” wheels, through the 2017 season. 10” wheels will not be allowed after 12/31/2017.
  2. May run bead lock wheels in any position. No wide 5 wheels or adapters allowed.
  3. Tires 8” wide. Must be track approved. Hoosier H500 only.
  4. Minimum ½” lugs and 1” nuts required for safety. 5/8” studs preferred.
  5. Modifications to wheel bearings for safety permitted.
  6. Tires will be Hoosier H500. No grooving of tires. No siping allowed. No chemical treating of tires.

Fuel system:

  1. Fuel cell Mandatory.
  2. Racing gas permitted. No other additives. No oxygenated FUEL EXCEPT FOR E85 allowed.


  1. 1.Florida Hobby Engine Options:
    1. Holley 4412 500 cfm gauge legal 2 barrel or Holley 1850 600 cfm with no more than 1.625” spacer including gaskets, must weigh a minimum weight of 3150lbs with conventional transmission and clutch as outlined.
    2. Holley 4412 500 cfm gauge legal 2 barrel and no more than a 1.625 spacer including gasket with Bert/Brinn/Falcon internal clutch or multi-disc clutch must weigh a minimum weight of 3250lbs.
  2. 2.Crate Motor Options:
    1. 602 crate engine may use any Holley type carb with 1.250 maximum spacer including gasket, at a minimum weight of 3050lbs with conventional transmission and clutch as outlined
    2. 602 crate engine with Bert/Brinn/Falcon internal clutch tranny or multi-disc clutch must weigh a minimum of 3150lbs.
  3. 3.Open Engine Options:
    1. Open engine options must weigh a minimum of 3400lbs with a gauge legal 500 cfm 2 barrel Holley 4412 carb, with no more than 1.625 spacer including gaskets.
  4. 4.Other weight penalties and weight breaks:
    1. If using a Johnson fabricated frame and/or Johnson tubular lower control arms an additional 50lb weight penalty must be added in front of flywheel. (50lb weight must be split into 25lbs on each side of engine within length of engine.
    2. 25lb weight break for Full containment seat and 25lb weight break for Hans/Head restraint system, foam neck brace does not qualify.

Other Information:

  1. $200 claimer per shock, must provide your same located shock for exchange. Cash only.
  2. No grinding or defacing of any casting numbers. Any engine parts with missing or altered casting numbers are illegal regardless of reason.
  3. Tech inspector will weigh and inspect various parts of Top finishing cars every week after heats and features. A competitor may file a protest to further inspect cars and engines. (See general rules for protest fees)
  4. All protests must be submitted in writing and given to the BRP tech official within 10 minutes of completion of event. All counter protest must be submitted in writing and give to the BRP tech official within 10 minutes of original protest.
  5. Track officials and Tech inspector reserve the right to inspect and tear down any car at any time. Management is committed to maintaining a fair and even playing field for all competitors and will consistently be researching and evaluating all facets tech.
  6. The absence of a specific rule does not imply approval. It is your responsibility to ask the tech inspector in advance if something is questionable. All tech decisions are final.
  7. Any driver getting out of his car during an event will be disqualified from that event, unless the vehicle is upside down or showing signs of fire.
  8. The track reserves the right to add weight in the fairness of competition.
  9. No electronic enhancing devices allowed.