RIVERSIDE STOCK RULES
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MUFFLERS ARE MANDATORY 

RIVERSIDE STOCK 2010 RULES

Updated 12/2/2009

Section 1: General

1.1 This is an entry economy class to enable racers to get started in V-8, full bodied car racing. Any American made sedan or coupe is eligible. No station wagons, 4 wheel drives, or Jeep type vehicles. No two door sports type cars.

1.2 Minimum stock wheel base allowed 101”.

1.3 Car must have a towing hook in the front and rear of car or chains bolted to frame. Must be easily accessible to the tow truck operator.

1.4 Body & engine must be same manufacturer. GM to GM, Ford to Ford, Chrysler to Chrysler.

Section 2: Safety

2.1 All safety items are subject to Technical Inspectors approval.

Section 3: Body

 3.1 All doors must be welded or bolted shut.

3.2 All glass must be removed.

3.3 All molding, lights and light lenses must be removed.

3.4 Rear seat cushions must be removed and any resulting holes must be covered with .22 gauge sheet metal.

3.5 Complete bumper to bumper steel body must be retained.

3.6 May tie front and rear unibody rails together.

3.7 Stock steel unaltered floor pans and firewalls must be retained.

3.8 Wheel openings may be cut and rolled-in for tire clearance.

3.9 Front inner wheel wells may be removed.

3.10 Bodies must remain original factory stock appearing. No chopping, channeling, shortening or cutting allowed.  Aftermarket steel body panels are allowed for repair of race damage, but no homemade sheet metal bodies allowed. No aluminum sheet metal may be used for any part of body.

3.11 Hood and deck lid bracing may be removed. Fiberglass hoods allowed, but must remain stock appearing.

3.12 Hood and trunk must be secured with positive type fasteners. No hinges.

3.13 No Mirrors.

3.14 Rub rails are permitted between front and rear fender wells and must not protrude from body more than 1 nch and not wider than 2 inches. Must be securely fastened, minimum of 3/8" bolts.

3.15 After-market racing nose pieces will be permitted.

3.16 Body subject to Tech Inspector’s approval.

3.17 New bodies may be used on old chassis (for example, 1982 or later Camaro body on 1981 or earlier frame) as long as length and width are accommodating. Must be tech approved.

3.18 Must have stock bumper or tech approved reinforcement. No sharp edges. No heavy gauge bumpers allowed.

3.19 All sheet metal must be in good condition and appearance.

3.20 Numbers must be at least 18” high on both doors and on the roof, and in contrasting colors to the body color.

Roof number must be placed so that it is read by viewing the car from the passenger side, and easily visible to the scoring tower. No holographic numbers.

3.21 Eight Inch Metal Spoiler allowed 

Section 4: Frame 

4.1 Completely stock and unaltered.

4.2 May tie sub frames together.

4.3 Track width maximum of 82" measured outside to outside of tires. Offset frames not allowed.

Section 5: Roll Cage

5.1 Full 8 point roll cage required, with a minimum of three (3) door bars on driver side and two door bars on passenger side is mandatory.

5.2 May not reinforce the body or alter the geometry of the car.

5.3 Side bars on driver’s side may extend into the door opening.

5.4 Bars must be welded and gusseted.

5.5 Minimum of two bars must extend back through rear firewall, and connect to rear frame. Rear loop allowed.

5.6. Front loop around radiator allowed, but not wider than roll cage.

Section 6: Firewalls

6.1 Front and rear must be stock with all holes patched with sheet metal to seal the driver’s compartment.

Section 7: Wheels/Tires

7.1 Asphalt racing tires allowed, minimum durometer reading of 45. Must hoop 15".

7.2 Maximum wheel width – 10”, steel wheels only.  All offsets must allow front and rear to track the same. Offset subject to tech inspection and approval.

7.3 Mag wheels are not allowed.

7.4 Must use 5 oversized lug nuts per wheel.

7.5 Larger wheel studs required on all four wheels.

7.6 Plating a stock wheel is legal, steel wagon wheel or steel slot wheel is considered a reinforced wheel without any modifications and is legal.

7.7 Bead locks allowed.

Section 8: Brakes

8.1 Brakes must be in working order at all times, and each wheel must lock up on inspection. Right front brake optional.

8.2 Cut-off valves or adjustable proportioning valves are allowed, but not within reach of the driver while strapped in the driver’s seat.

Section 9: Suspension 

9.1 Front and rear springs may be aftermarket parts. Rear sliders allowed.

9.2 Minimal modifications allowed to install springs, such as cutting of spring bucket area.

9.3 Spacers maybe used, but only for frame-to-body clearance.

9.4 Front shocks must be mounted in stock location. If using a Ford 9" on a GM frame, either axle shock mount or body shock mount must be in stock location. Rear shocks must be replacement type for stock parts. No universal fit parts.

9.5 No coil overs or air shocks. HEIM end shock mounts may be used if situation in 9.4, above regarding Ford 9" rear axle in a GM frame is applicable. Non-Adjustable racing shocks allowed - one per wheel.

9.6 Modifications are not allowed to stock upper or lower control arms.

9.7 No steel control arm bushing allowed. May use urethane replacement bushings.

9.8 All steering arms and parts must be factory or suitable replacement. (TRW, Moog, Dana, McQuay Norris.) No racing adjustable parts allowed. Steering quickener allowed.

9.9 No modifications to lower rear factory trailing arms. Must be stock, equal length bars.

9.10 Factory 4 link must use all trailing arms and bushings must be in good repair.

9.11 No aftermarket panhard bar.

9.12 No jacking bolts, or other similar types of suspension adjustment allowed.

Section 10: Clutch / Transmission

10.1 Stock transmission and single disc stock type clutch only.

10.2 Automatic transmission must have stock torque converter (no Lock Up converter). Ten inch converter permitted.

10.3 Safety strap of 360 degrees under front half of drive shaft required.

10.4 Stock steel fly wheel only. Corvette and SVO fly wheels not permitted.

10.5 Any stock 3 or 4 speed transmission with reverse, and all working gears.

10.6 Automatic transmission cooler is permitted. Must not be in driver's compartment.

10.7 Stock steel drive shafts only.

10.8 Driveshaft must be painted white.

10.9 May use hydraulic throw-out-bearing and master cylinder.

10.10 A 360 degree blow proof bell housing is mandatory. Must have 3 inch inspection hole in bottom to inspect clutch.  Auto transmission must have SFI approved shield or blanket.

Section 11: Rear-end

11.1 Must be stock factory parts. May use Ford 9". Rear axle must be located in the stock position. (See 9.4, above regarding mounting of shocks.)

11.2 Locked rears are mandatory. Spool or welded spider gears allowed.

11.3 Floating rear ends allowed, but no 3/4 ton truck rears.

Section 12: Battery

12.1 Batteries may be moved to the inside of the car but must be securely fastened inside a box.

12.2 Batteries permitted in trunk.

12.3 All batteries must be enclosed in safety box. Subject to tech approval.

12.4 Gel batteries recommended.

Section 13: Cooling Systems

13.1 One stock type aluminum or racing radiator only under hood in front of engine in stock location.

13.2 No anti freeze allowed. 

Section 14: Fuel System

14.1 Pump commercial gasoline or racing fuel only. No alcohol.

14.2 Fuel cells must be used, and will be checked for condition and date of manufacture.

14.3 Fuel cells must be vented to the outside of the car.

14.4 Fuel cells may be mounted 3 inches lower than bottom of rear frame rails.

14.5 Fuel caps must be secured to fuel cell, or safety wired.

14.6 Fuel line may not exit bottom of fuel cell.

Section 15: Engine

15.1 All casting numbers must be unaltered.

15.2 Must be in stock location. Driver's side front plug must be in line with grease fitting on left front upper ball joint. No set-back allowed. Minimum height of center of crankshaft from the ground is 10 inches.

15.3 Blocks:

15.3.1 Production OEM only. (No bowtie, SVO, etc.).

15.3.2 Cast iron only. No aluminum.

15.3.3 A maximum overbore allowed .060

15.3.4 Maximum Cubic Inch Displacement: GM - 362 cu. in., Ford - 362 cu. in. and Chrysler - 370 cu. in.

15.3.5 Must pass pump check.

15.4 Cylinder heads: No aftermarket heads allowed.

15.4.1 Cast iron only.

15.4.2 No GM small block angle plug heads. VORTEC heads permitted.

15.4.3 No porting or polishing.

15.4.4 GM - 55 cc min., Ford - 55 cc min.

15.4.5 Valve spring diameter limited to original production diameter for head used.

15.4.6 Three angle valve job maximum.

15.4.7 No titanium valves or exotic metals. Steel or Stainless valves only.

15.4.8 Stock valve stem diameter and length. Valve sizes limited to OEM production diameter for head used.  Aftermarket retainers and keepers allowed, but in stock OEM configuration.

15.4.9 No under-cut valve stems.

15.4.10 Stock-type rocker arms. Stock ratio for make: GM - 1.5:1, Ford - 1.6:1

15.4.11 Polylocks are permitted.

15.4.12 Stock diameter push rods.

15.4.13 No bowl work allowed under valve seat.

15.4.14 No porting or machining for gasket matching allowed. Minimum clean up permitted. Subject to CC inspection.

15.4.15 Stock type valve spring configuration only.

15.4.16 Screw-in-studs & guide plates allowed. NO stud griddles.

15.5 Pistons:

15.5.1 Any flat top piston allowed with 2 or 4 valve reliefs.

15.5.2 No domed pistons.

15.5.3 Stock wrist pin diameter.

15.5.4 Zero deck height.

15.6 Crankshaft:

15.6.1 Stock production only or eagle cast crank – part #103503480 GM.

15.6.2 Stock stroke only.

15.6.3 Any means of lightening other than balancing is illegal.

15.6.4 No knife edging.

15.6.5 Solid steel aftermarket dampener allowed. No Fluid dampeners.

15.7 Connecting rods:

15.7.1 Must be OEM I-Beam rod. Press pins standard diameter through bolt rod. Floating pins allowed or eagle “SIR” rods.  Part #SIR5700BPLW or SIR5700BBLW for Chevy’s; part #SIR5956FP or SIR5956FB for Fords.

15.7.2 Stock length only.

15.7.3 No polishing.

15.7.4 Any means of lightening other than balancing is illegal.

15.7.5 After market rod bolts permitted.

15.8 Camshaft / Lifters:

15.8.1 Hydraulic or solid flat tappet allowed. No mushroom lifters.

15.8.2 No roller, roller lifters, or roller rockers.

15.8.3 No gear drives.

15.8.4 Stock lifter diameter only.

15.8.5 No variable duration / bleed-down type lifters.

15.8.6 Firing order on engine must remain original.

15.8.6 Stock rockers only.

15.8.7 Engine must show 15" vacuum at 1000 rpm. No vacuum pumps.

15.9 Intake Manifold / Carburetor:

15.9.1 Intake manifold may be case iron two (2) or four (4) barrel OEM, or aftermarket aluminum. No tunnel rams.

15.9.2 No TBI manifolds.

15.9.3 One Holley model 4412, 500 CFM two (2) barrel or Rochester two (2) barrel only. No marine carburetors.” One Carburetor.

15.9.4 No polishing, grinding, porting or cutting allowed with the exception of choke butterfly plate and choke tower removal.  Must pass inspection using "Go, No-Go” gauge.

15.9.5 May use two gaskets, maximum thickness 0.08 inch each.

15.9.6 A two-inch spacer or adapter maximum.

15.9.7 Stock OEM STYLE mechanical fuel pumps only, in stock location. No electric fuel pumps.

15.10 Ignition:

15.10.1 Any stock OEM distributor allowed.

15.10.2 Single points.

15.10.3 Any stock style OEM coil allowed. Must fit in stock cap if HEI.

15.10.4 Stock style HEI systems permitted. No MSD modules.

15.11 Exhaust:

15.11.1 Economy headers OK. No 180 degree headers.

15.11.2 No modifications allowed.

15.11.3 No Corvette manifolds.

15.11.4 H-pipes & 2 into 1 systems allowed.

15.11.5 Exhaust pipe diameter 3" maximum I.D., must be parallel to track.

15.11.6 Exhaust must be securely bolted. No band clamps permitted.

15.12 Engine Location / Oil Pans:

15.12.1 Stock location only. See #1 plug rule, above.

15.12.2 After-market oil pans allowed.

15.12.3 Engines may be bolted direct to the frame, or chains over engine mounts are permitted.

Section 16: Weight

16.1 Car will be weighed in post-race condition.

16.2 Car must weigh 3000 lbs with driver and no added fuel.

16.3 The track scales are official.

16.4 Failure to meet weight will result in disqualification.

16.5 All lead must be properly secured and painted white. (Subject to tech inspection.)

16.6 All lead must have car number painted on it. (Subject to tech inspection.)

Section 17: Protest/Post-Race Inspection

17.1 $300 for the top half of engine. $500 for complete engine. $250 for removal of bell housing to inspect fly wheel/torque converter.

17.2 Track does NOT pay for labor or materials associated with teardown for inspections.

17.3 Protest must be submitted within 10 minutes of feature completion (drop of checkered flag) for that class. Car protested has right to counter protest. Only top 5 can and on the lead lap may protest.

17.4 Can OR Can’t rule: Do not try to read between the lines in the rule book. Just because the book doesn’t say you can’t, don’t assume you can. Any modifications not specifically outlined here are at the Tech Departments discretion. All final decisions will be made by the tech Officials. Ask first before you assume something is legal.  Penalty will be loss of points and winnings for the night and suspension for two race cards for this class.

Section 18: P&G/Teardown

18.1 All participants are subject to a P&G test at anytime.  If a car wins 3 races during the season they will be subject to a P&G test and/or engine teardown.  Failure to comply with this rule will result in automatic disqualification, loss of money and points for that night.  If a driver/owner refuses to the inspection before the car is allowed to compete again the car/engine will be inspected (inspection may include a engine teardown).