Engine Specifications:
• HP: 380 Prop
• Block: OE roller block 4 bolt main 1pc seal 1996-2000
• Bore/Stroke: 4.040 x 3.750
• Displacement: 383 (Reman Mercruiser 377)
• Crankshaft: Scat 4340 forged external balance rear of crank/internal balance front of the crank
• Rods: Scat 4340 forged I beam with ARP 8740 bolts
• Pistons: Forged 9.1:1` compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: 215/220 @50 .457in/.474ex 112LSA
• Timing Chain: Single Roller
• Cylinder Heads: Dart vortec cast iron 67cc/165cc 2.02/1.60
• Rocker Arms: Stamped steel 1.5 rockers
• Oil Pan: Rear sump 5qt
• Oil Pump: Melling
• Flexplate/Flywheel: Pioneer #FRA-159 external balance 168 tooth (with Scat kit)

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.

The post ATK HP105 Chevy 383 Stroker Marine Base Engine 380HP (Mercruiser MPFI 377CI ) appeared first on ATK High Performance Engine.

Recommended Components:
• Balancer: Internally balanced – PowerBond #PB1046-N
• Intake Manifold: Weiand stealth dual plane #8150
• Carburetor: Marine grade 650-680cfm
• Fuel Pump: Holley mechanical 110GPH #12-327-11
• Distributor: Marine grade with iron gear
• Spark Plugs: Autolite #3923
• Spark Plug Wires: Marine grade 8mm
• Water Pump: Per application

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+

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.

The post ATK HP96 Chevy 383 Stroker Marine Base Engine 380HP appeared first on ATK High Performance Engine.

Recommended Components:
• Balancer: Internally balanced – PowerBond #PB1046-N or per application
• Intake Manifold: Marine grade dual plane
• Distributor: Marine grade pro billet (iron gear)
• Water Pump: Per application
• Carburetor: Marine grade Quick Fuel 650CFM mechanical secondary’s electric choke #M-650
• Fuel Injection: Can be used with MPFI, but custom tuning required to ECM.
• Fuel Pump: Marine grade 110GPH mechanical or an Electric fuel pump
• Spark Plugs: Autolite #605
• Spark Plug Wires: Marine grade 8mm per application

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: Stock
• Exhaust: 1 5/8 Headers or stock manifolds

Notes: This is a MARINE engine. The bearing clearances and camshaft profile are designed for marine use. Not intended for automotive applications.

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.

The post ATK HP90 Chevy 383 Vortec Marine Base Engine 345HP appeared first on ATK High Performance Engine.