315 Cubic Inch Super 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. V-Drives Allowed(Maximum ratio 1.030)
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 may be
OEM or Aftermarket, with OEM or aftermarket rod bolts.
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 be bushed.
Connecting Rods Must be Steel.
No Titanium Rods.
No Aluminum Rods.
Pistons
Pistons must be Cast or Forged, minimum Weight 475 grams
(without pins).
Pistons Must be Flat Top With Four Valve Reliefs.
305cid Chevy minimum Piston weight 420 grams.
Any Machining to pistons
will Not be Allowed Except for Balancing.
Fly Cutting Valve Reliefs Only is Allowable
Pin weight minimum 100 grams.
Pin Height Must Remain OEM.
Floating Pin is 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 be within 7% of OEM C.C.
No Bowtie, SVO, Direct connection, Vortec, or any 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 maximum).
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.
Dual Coil valve springs
are 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
Any Holly or AFB Type UP TO 750 CFM Carburetor may be used
with any Intake Manifold. NO Milling of Intake Manifold.
No H.P. Series Carburetors
No Tunnel Rams.
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.
Carburetors Must Have the Stock, Unaltered Air
Horn.
No Porting or Match
Porting Allowed.
No Acid Porting or Spray
Welding Allowed.
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 Allowed.
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