315 Cubic Inch Stock Garvey

            If anyone has a question or needs an explanation about any rule in this class, refer to the engine Committee for verification.  Every engine must have two intake bolts drilled (across from each other) for sealing purposes.  Note: The Engine committee will be the determining party on a protest as to the legal status of any engine.  

                                            Block

Block must be stock OEM cast iron with a bore not to exceed 315 CID. 

OEM Lifter Bores Mandatory.

OEM Cam location Mandatory.

Splayed Main Caps are Not Allowable.

Line Boring is Allowable.

Decking is Allowable, average Deck Height to be Zero or Less.

Block Bore Specs:                         Oversize

            Chevy 305-307                      .030

            Chevy 283                              .060

            Ford 289                                .060

            Ford 302                                .030

            AMC 304                               .030

            Mopar 273                             .060

Crankshaft

Strokes are to be OEM and In-kind to selected block (no stroking or de-stroking).

Aftermarket Crankshafts meeting OEM Specifications Allowed.

Journal Sizes must meet OEM Requirements and can be cut up to 0.040 under OEM Standard.

Drilling for oil will be Allowed.

Balancing will be Allowed.

No Ultra Light, No cut down, No knife-edge, must be stock in appearance.

Crankshaft must be cast iron or steel, No Titanium.

Connecting Rods

Connecting Rods must be OEM or Aftermarket OEM Equivalent.

Aftermarket Rod must be Stock In Appearance.

 Aftermarket rod bolts are  Allowed.

Aftermarket Rod Weight Must Equal or Exceed OEM Weight.

Connecting Rods must be of Stock OEM Length measured center to center and contain an OEM Rod Journal Bore for Block being used.

Connecting Rod may be Side Clearanced.

Connecting Rod pinhole may not be not bushed.

Connecting Rods Must be Steel.

No Titanium Rods.

No Aluminum Rods.

                                                                                       Pistons

Pistons must be Cast or Forged, minimum Weight 500 grams (without pins).

Pistons Must be Flat Top, With Four Valve Reliefs.

305cid Chevy minimum Piston weight 475 grams.

Any Machining to pistons will Not be Allowed Except for Balancing.

Fly Cutting of intake valve pocket only for clearace on 283 with 184 intake valve.

Pin weight minimum 100 grams.

Pin Height Must Remain OEM.

Floating Pin is Not Allowed.

Any Three ring combo Allowed.

No Thermal Coatings.

Reversing of pistons Allowed

                                        Camshaft and Timing Chain

Camshaft shall be any OEM style, Hydraulic Only.

No mushroom or roller style cams allowed.

Hydraulic Lifters Only (lifter must function hydraulically with 0.050 min. piston travel).

Lifter must be OEM stock size

DeGreeing of Cam is Allowed.

No belt or gear drives allowed.

OEM style chain drives only (double roller acceptable).

Oiling System

Any Wet Sump system Allowed .

External oil coolers are Allowed.

Remote oil Filters Allowed.

No Dry Sumps.

Cylinder Heads

Any Cast Iron Non-Vortec OEM  Head Allowed. must meet 7% of OEM  C.C.

No Bowtie, SVO, Direct connection, Vortec, No Aftermarket Heads Allowed.

No Porting Or Port Matching of any kind on either heads or intake manifold.

Heads may be Milled on Deck Surface Only(up to 0.020 max).

No Acid porting or Spray welding may be performed.

Roller Rockers are permitted. Ratios are as follows: Chevy-1.50, Ford-1.60, Chrysler-1.60

Shaft Rockers are Not Allowed.

Any Valve Spring is permitted as long as it fit into the Stock Spring Pocket and has a Single Stock Diameter Spring.

Dual Coil valve springs are Not permitted.

Any Valve Keepers may Be Used, Retainers Must Be Steel.

Screw In Studs and Stud Girdles are Permitted.

Long Slotted Rockers and Grooved Pivot Balls are Allowed.

Valves

            Type                Intake               Exhaust           Rocker Arm Ratio

            Chevy              1.84                   1.50                             1.50

            Ford                 1.84                   1.55                             1.60

            Chrysler           1.88                   1.50                             1.50

AMC                1.88                   1.50                             1.50

Valve Stem must be stock OEM Diameter. + OR - .010

Swirl Finish Allowable

Stainless Steel Valves are Allowed.

No Pro-Flo Valves

No Titanium Valves.

Carburetion

Carburetor Must be a two Barrel (Holley Mod.#2300) and is not Allowed To Exceed 500 CFM.

NO Milling on Intake Manifold allowed.

No Over Sized Throttle bores.

Venturies are to be OEM with no Polishing or Modifying Allowed.

Over sizes Jets and Power Valve Modification will be Allowed.

Removal of  Choke Butterfly and related hardware Allowed.

Removal of Air Horn Not Permitted.

No Porting or Match Porting Allowed.

No Acid Porting or Spray Welding Allowed.

No Tunnel Rams.

No Sheet Metal Intakes Allowed.

Wedge Specifications and Valve Job Sheet Attached.

Ignition

Any OEM or Aftermarket Distributor, Coil, HEI, or MSD type Allowed.

No Magnetos Allowed.

Miscellaneous Specifications

Any Gasoline type Fuel, Example Fuels: VP, CAM 2, Torco, Sunoco.

No Fuel Additives Allowed.

Fuel Injection, NOS, Propane, Oxygen, and Alcohol are Not Permitted.

Any Exhaust is Allowed.

Any Starter Fly Wheel Combo Allowed.

Block Filler In Cooling System is Not Allowed.

Any Mechanical Or Electric Fuel Pump Allowed.

Oil restrictor and screen kits Allowed.

Direct Drive Prop System Only.

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