NorCal Vintage Hard Tops

  


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Vintage Hard Tops

We're a group dedicated toward the Restoration & Preservation of Vintage Hardtop Race Cars and organized live hardtop racing. Check our Schedule to see History on Wheels!

-Conrad Cavallero & Mike McClure

T-Shirt Information

 

 

NORCAL VINTAGE HARDTOPS RACING RULES          
 Updated 2009 Rules Will Be Posted Soon       

The following rules and specifications are intended as a guideline for the 2008 race season. They will be our foundation for coming years.  We hope to keep them as simple and fair as possible.

 

Body:

  1. 1928-1948 steel American-made passenger car sedan or coupe type only.  NO pick-ups or convertibles.  Bodies must be completely stock.  NO chopping shortening or altering.  All flammable material, glass and hardware must be removed.  All window openings must remain stock except rear window may be enlarged a maximum of 6 inches all around opening.  Rear of body may be shortened or bobbed to the last rear cross member.  Doors must be welded or bolted shut.  Stock cowl must remain on body except for trimming in diagram.  Hood mandatory and must be stock appearing for body being used.  Hood can be aluminum, steel or fiberglass replacement.  Bodies will have a 60” minimum height measured from ground to top of body. NO portion of body may be lower than the bottom of the frame main rails.

Weight:

  1. All 6 cyl. and flathead V-8 car will weigh a minimum of 2100 lbs.  All overhead valve V-8 cars will weigh a minimum of 2200 lbs.

Floorboards:

  1. Car will have complete firewall and floorboard from firewall to behind driver’s seat and from side to side.  May be aluminum or steel.

Fenderwells:

  1. Front fenders and fenderwells may be removed.  Rear fenders may be removed.

Frame:

  1. Stock steel frame only.  Must have a complete X type crossmember (see Diagram).  Frame may be boxed for reinforcement.  Frame may be V’d outside of cage area.  All Crossmembers may be replaced with steel tubing, channel iron, or pipe.
  2.  NO replacement tubing used in main side rails between center of front axle and center of rear axle, except when needed for mounting nerfs, cage, body or springs.

Roll Bars:

  1. 1 ¾ “ o.d. x .095 minimum steel tubing cages mandatory.  Cage must be welded to mainframe in six places.  Minimum 3 sidebars on left and 2 sidebars on right connecting to front and rear cage uprights.  Cage must be cross-braced.

Front Axle:

  1. Must be a straight steel O.E.M. front axle from a passenger car or truck.  NO after market tube axles or twin I-beam axles.  Right front billet or safety hubs recommended.   Stock spindles OK.

Front Suspension and Frame:

  1. Front clip may be changed for safety. i.e. Mustang II, etc.  Must try to maintain vintage look.

Rear End:

  1. Any rear end permitted except the following: NO open live axles or independent rear ends.  Rear end may be locked or unlocked.  Safety hubs recommended.

Suspension:

  1. Adjustable shackles or sliders. Weight jacks OK.  Sway bars allowed but must be O.E.M. type.  NO after-market sway bars, NO torque arms, coil overs, torsion bars, spring rod and biscuit, coil over eliminator, or fifth arm suspension permitted.
  2. Rear Leaf springs only, mounted in stock location.  May use after market springs.

Shocks:

  1. Steel shocks only.  Minimum of 1 shock per wheel mounted in any position.  Racing shock permitted but cannot be adjustable.  NO driver permitted adjustable shocks or weight adjusting devices allowed.

Steering:

  1. Any truck or passenger car steering box permitted.  Power steering boxes and pumps permitted.  Steering may be quickened or a quickener added.
  2. Steering wheel and seat may be moved to center of car.  Racing steering wheels and quick release hubs recommended.

 

Brakes:

  1. All cars must have adequate brakes on a least 3 wheels at all times.  Any type brake system allowed.  Disc brake calipers must be steel.

Transmissions:

  1. Any O.E.M. transmission allowed.  Must have all forward gears and one reverse gear in working order.  Automatic transmissions with any converter allowed.  NO in and out boxes or quick-change boxes.

Clutch:

  1. Single disc only.  10” minimum o.d. of clutch-pressure plate assembly.  NO direct drive, multiple disc, dog or Ram type friction clutch allowed.

Wheels:

  1. Any 8” steel wheel allowed.  Racing wheel recommended.  NO aluminum, magnesium, plastic or carbon fiber wheels allowed. NO bead locks.

Tires:

  1. Any tire.  Any recap tire.  Maximum tread width is 8” except RIGHT REAR, which will have maximum tread width of 10”.  Tires may be grooved.  McCreary, Hoosier, Goodyear, American Racer OK. Tire must fit within tire width gauge.  NO exceptions.

Wheelbase:

  1. Wheelbase must be within 2” of stock wheelbase for year of body used.  NO car will be permitted with less than the minimum of 105” measured on the shortest side at anytime, unless it was caused by an incident on that race date.

Fuel Tank:

  1. Fuel tank must be located in the rear area of the body.  It must be in an area sealed off from the driver.  It must have a vent valve for safety in case of a roll over.  Fuel cells are recommended.

Fuel Lines:

  1. Fuel lines must be run through steel tubing and above the floorboards. 

 Fuel:

  1. Pump gas and racing gas ONLY.  NO alcohol, nitro, or nitrous oxide.

Radiator:

  1. Any radiator may be used; must have overflow tank.  Must be in front of engine.

Drive shaft:

  1. Must be painted white and have safety strap at front of shaft.

Battery:

  1. Must be securely mounted and sealed (covered)

Flywheel:

  1. May be aluminum or lightened but must have a starter ring gear.  All cars must be self-starting with starter in good working order.

Scatter shield:

  1. Shield must be a minimum 3/16 x 4” steel, 180 over bellhousing area, and be mounted the frame. Or use an approved scattershield bellhousing such as C.A.E., Lakewood, etc.  Belting of not less than ¼” thick may be used.

Engines:

Any American or Canadian O.E.M. gas engine permitted, except there will be NO V-6 or overhead camshaft engines allowed.  The following limitation and rules apply:

6 Cylinder & Flathead Engines

A: cylinder overhead valve engines, or flathead V-8 or 6 cyl. engines have NO cubic inch limits or restrictions. (Except B below)

B:NO fuel injection, blowers, or super charges on any engine.

V-8 Engines:

8 cylinder overhead valve engine, 360 cubic inch maximum, stock stroke, stock crankshaft, stock rods, stock bore with a maximum .060 overbore for clean up, steel heads with NO porting or polishing, steel O.E.M. block.

  • Carburetor:  Must be a Holly 2 barrel # 4412.
  • Manifold: Any single 2 or 4 barrel, cast iron or aluminum in take allowed.  NO tunnel ram type manifold permitted
  1. NO internal modifications expect for cam, Oil pump, timing chain, and piston.
  2. Camshaft:  Hydraulic or flat tappet with .560 maximum lift, NO roller cams.
  3. Oil pump: Hi-performance replacement allowed, NO dry sump systems.
  4. Timing Chain: Stock or true roller chain only, NO hear drive or belt systems.
  5. Piston:  Flattop only, cast of forged piston permitted.
  6. Oil pan:  May be baffled or capacity increased.
  7. Ignition:  Stock with internal modifications OK. NO magnetos.
  8. Roller rocker arms allowed
  9. Headers allowed. NO 180 systems allowed.
  10. Fuel pump: Any pump OK, but MUST be mounted in its original location.
  11. NO Vortec cylinder heads or manifolds.

Engine set back:

  1. All engines will be allowed to set back NO further then number one spark plug even with left upper ball joint or kingpin.  Or mounted in its stock position.

Mufflers:

  1. All cars must run mufflers at all times and must be 95 dB. Or less at 100 ft.

Nerf Bars:

  1. Must have side nerfs on all sides of car with NO sharp or jagged edges and securely fastened.  Front nerf should be rounded.  Rear nerf should be wide enough to cover 50% of the tires.

Seat:

  1. Aluminum racing seat only.  NO fiberglass or plastic seats.  Seat mounting must have 4 – 3/8” bolts minimum, 2 bolts on the bottom and 2 bolts on the seat back near the top area with large washers on each.  All seats must have high back or headrest.

Seat Belts:

  1. A quick release seat belt and shoulder harness no less than 3_ wide and submarine (crotch) belt are mandatory.
  2.  All belt ends must be attached to roll bar cage separately from the seat with 5/16_ grade 5 bolts minimum.
  3. A steel plate may be welded to roll bar cage at driver’s right side for belt attachment to prevent driver from sliding side to side under belt.
  4. Belts must come from behind driver.
  5. Worn belts must be replaced

Window Net:

  1. Window nets are mandatory.

Fire Control:

  1. Minimum 2-½ pound A-B-C type (dry powder) fire extinguisher must be mounted within driver’s reach in an approved bracket.
  2. Each pit area must be equipped with a serviceable A-B-C type (dry powder) fire extinguisher, in addition to system in racecar.

Appearance:

  1. Cars must be attractively painted with large numbers in contrasting color.  Number must be at least 24” high on each side and deck lid or roof of car.  NO primer painted cars permitted.

Communication:

  1. NO radio communication with driver is allowed.

Rules are Subject to Change

 

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