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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
.040 Chevy 283
.060 Ford
289
.060 Ford
302
.040 AMC
304
.040 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 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.(i.e.-Speed Pro ZH534CP30) 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. Edelbrock part 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. Carburetor Must Have the stock, unaltered Air
Horn. 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.Space between bottom of Carburetor and top of 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. Tear Down Normal Carburetors ======================================================
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