The ATK HP94 Chevy 383 stroker base engine is a strong street-performance small block built to deliver 415 horsepower and 460 ft.-lbs. of torque with a proven combination of aftermarket internals and aluminum heads. Featuring a 4-bolt OE roller block, Scat crank and rods, hypereutectic pistons, a hydraulic roller cam, and ATK high-performance aluminum heads, this 383 is designed for reliable power, crisp throttle response, and solid street manners with the flexibility to complete the build with your preferred induction and accessories. Engine Specifications:• HP: 415• TQ: 460• Block: OE roller block 4 bolt main 1pc seal 1996-2000• Bore/Stroke: 4.040” x 3.750”• Displacement: 383CI• Crankshaft: Scat Nodular Iron external balance rear of crank/internal balance front of the crank• Rods: Scat I Beam 5.7” Rods with ARP 8740 Bolts• Pistons: Hypereutectic 9.7:1 Compression• Rings: Moly• Camshaft: Hyd. Roller• Cam Specs: 220/224 @50 .528in/.536ex 110LSA• Timing Chain: Double Roller• Cylinder Heads: ATK High Performance aluminum with 2.020 in. /1.600 ex. valves• Rocker Arms: Billet aluminum roller rockers 1.6 ratio• Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s)• Oil Pump: Melling STD Volume• Flexplate/Flywheel: Externally Balanced – Pioneer #FRA-159 (with Scat kit) Recommended Components:• Balancer: Internally Balanced – PowerBond #PB1046-N• Intake Manifold: ATK dual plane intake• Carburetor: Quick Fuel 680CFM Vacuum secondary’s electric choke #HR-680• Fuel Pump: Holley mechanical 110GPH #12-327-11• Distributor: HEI (Iron Gear)• Spark Plugs: Autolite #3923• Spark Plug Wires: 8mm• Water Pump: OE long pump Engine Info:• Oil: Conventional / Non Synthetic 10W30• Oil Filter: Wix or K&N• Timing: 34-36 Degrees• Spark Plug Gap: .035”• Firing Order: 18436572• Octane: 91+• Stall Converter: 2200-2800• Exhaust: 1 5/8+ Headers Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary. These engines are year and model specific. All cores must be returned to ATK as they will provide the bill of lading and schedule the pickup once contacted. Do NOT return cores to Speedway Motors. Please refer to the link under the Installation Details or click here for more information.
Highlights
- HP: 415
- TQ: 460
- Block: OE roller block 4 bolt main 1pc seal 1996-2000
- Bore/Stroke: 4.040” x 3.750”
- Displacement: 383CI
Specifications
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Crate Engine Type: Long Block
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Engine Displacement: 383 cu. in.
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Horsepower: 415 horsepower
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Compression Ratio: 9.7:1
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Torque: 460 ft./lbs.
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Camshaft Type: Hydraulic Roller
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Cylinder Head Material: Aluminum
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Piston Material: Hypereutectic Aluminum
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Camshaft Duration (.050 in): 220° intake / 224 ° exhaust
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Camshaft Lift (in): .528 intake / .536 exhaust
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Bore x Stroke (in): 4.040" x 3.750"
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Carburetor Included: No
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Intake Manifold Included: No
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Distributor Included: No
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Valve Covers Included: Yes
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Engine Balance: External
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Cylinder Heads Included: Yes
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Rear Main Seal Style: 1-piece
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Throttle Body Included: No
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Oil Pan Included: Yes
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Timing Cover Included: Yes
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Water Pump Included: No
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Harmonic Balancer Included: No
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Flexplate Included: No
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Flywheel Included: No
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Air Cleaner Included: No
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Spark Plugs Included: No
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Spark Plug Wires Included: No
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Computer Included: No
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Wiring Harness Included: No
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MFG. Part #: HP94
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Sold in Quantity: Each
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Accessory Bolt Holes Drilled: No
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Recommended Fuel: 91 Octane
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Spark Plug Style: Stock
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Brand: ATK Engines
