SBC Engines - ATK High Performance Engine https://atkhp.com/product-category/gm-crate/gm-base-engine/gm-base-sbc-engines/ Building Performance Engines Since 1936 Mon, 10 Jun 2024 18:45:56 +0000 en-US hourly 1 https://wordpress.org/?v=6.5.5 https://atkhp.com/wp-content/uploads/2022/12/cropped-ATKHP300x300-32x32.png SBC Engines - ATK High Performance Engine https://atkhp.com/product-category/gm-crate/gm-base-engine/gm-base-sbc-engines/ 32 32 ATK HP101 Chevy 383 Stroker Base Engine 460HP https://atkhp.com/product/atk-hp101-chevy-383-stroker-base-engine-460hp/ https://atkhp.com/product/atk-hp101-chevy-383-stroker-base-engine-460hp/#respond Fri, 21 Jul 2023 19:55:17 +0000 https://atkhp.com/?post_type=product&p=5513 Engine Specifications: • HP: 460 • TQ: 490 • 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: […]

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Engine Specifications:
• HP: 460
• TQ: 490
• 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: Forged 10:1 Compression
• Rings: Moly
• Camshaft: Hyd. Roller
• Cam Specs: 224/236 @50 .591in/.591ex 108LSA
• Timing Chain: Double Roller
• Cylinder Heads: Dart SHP American Made aluminum 72cc/200cc 2.02/1.60
• 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: Weiand stealth dual plane #8150
• Distributor: HEI (Iron Gear)
• Water Pump: OE long pump
• Carburetor: Quick Fuel 680CFM Vacuum secondary’s electric choke #HR-680
• Fuel Pump: Holley mechanical 110GPH #12-327-11
• Spark Plugs: Autolite #3923
• Spark Plug Wires: 8mm

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: 2500+
• Exhaust: 1 ¾ Headers

Notes: This engine WILL NOT produce enough vacuum for power brakes.

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.

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ATK HP107 Chevy 383 Stroker Base Engine 525HP https://atkhp.com/product/atk-hp107-chevy-383-stroker-base-engine-525hp/ https://atkhp.com/product/atk-hp107-chevy-383-stroker-base-engine-525hp/#respond Wed, 17 May 2023 16:21:21 +0000 https://atkhp.com/?post_type=product&p=4548 Engine Specifications: • HP: 525 • TQ: 515 • Block: OE roller block 4 bolt main 1pc seal 1996-2000 • Bore/Stroke: 4.040 x 3.750 • Displacement: 383 • Crankshaft: Scat 4340 forged external balance rear of crank/internal balance front of the crank • Rods: Scat 4340 forged H beam with ARP 8740 bolts • Pistons: […]

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Engine Specifications:
• HP: 525
• TQ: 515
• Block: OE roller block 4 bolt main 1pc seal 1996-2000
• Bore/Stroke: 4.040 x 3.750
• Displacement: 383
• Crankshaft: Scat 4340 forged external balance rear of crank/internal balance front of the crank
• Rods: Scat 4340 forged H beam with ARP 8740 bolts
• Pistons: Forged 10.2:1` compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: 246/250 @50 .603in/.609ex 110LSA
• Timing Chain: Double roller
• Cylinder Heads: Dart aluminum 70cc/200cc 2.02/1.60
• Rocker Arms: Billet aluminum 1.6 roller rockers
• Oil Pan: Moroso 7qt with windage tray #20206
• Oil Pump: Melling
• Flexplate/Flywheel: Pioneer #FRA-159 external balance 168 tooth (with Scat kit)

Recommended Components:
• Balancer: PowerBond SFI internal balance 8” #PB1046-SS
• Intake Manifold: Holley strip dominator single plane #300-25
• Distributor: Pro billet (Iron gear)
• Water Pump: Weiand action + long pump #9240
• Carburetor: Quick Fuel 750CFM mechanical secondary no choke #Q-750
• Fuel Pump: Holley mechanical 110GPH #12-327-11
• Spark Plugs: Autolite #3923
• Spark Plug Wires: 8mm

Engine Info:
• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N per application
• Timing: 34-36 Degrees
• Spark Plug Gap: .035”
• Firing Order: 18436572
• Octane: 91+
• Stall Converter: 3500+
• Exhaust: 1 ¾+ 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.

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ATK HP55 Chevy 383 Stroker Base Engine 500HP https://atkhp.com/product/atk-hp55-chevy-383-stroker-base-engine-500hp/ https://atkhp.com/product/atk-hp55-chevy-383-stroker-base-engine-500hp/#respond Wed, 17 May 2023 16:18:13 +0000 https://atkhp.com/?post_type=product&p=4545 Bullet Proof Street- Strip engine lopey idle, great power and may not work with power brakes or factory AC.  Engine Specifications: • HP: 500 • TQ: 505 • Block: OE roller block 4 bolt main 1pc seal 1996-2000 • Bore/Stroke: 4.040 x 3.750 • Displacement: 383 • Crankshaft: Scat 4340 forged external balance rear of […]

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Bullet Proof Street- Strip engine lopey idle, great power and may not work with power brakes or factory AC. 

Engine Specifications:
• HP: 500
• TQ: 505
• Block: OE roller block 4 bolt main 1pc seal 1996-2000
• Bore/Stroke: 4.040 x 3.750
• Displacement: 383
• Crankshaft: Scat 4340 forged external balance rear of crank/internal balance front of the crank
• Rods: Scat 4340 forged H beam with ARP 8740 bolts
• Pistons: Forged 10.2:1` compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: 237/245 @50 .597in/.597ex 112LSA
• Timing Chain: Double roller
• Cylinder Heads: Dart SHP American Made aluminum 72cc/200cc 2.02/1.60
• Rocker Arms: Billet aluminum 1.6 roller rockers
• Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s)
• Oil Pump: Melling
• Flexplate/Flywheel: Pioneer #FRA-159 external balance 168 tooth (with Scat kit)

Recommended Components:
• Balancer: PowerBond internal balance 8” #PB1046-N
• Intake Manifold: Edelbrock performer RPM air gap #7501
• Distributor: Pro billet (Iron gear)
• Water Pump: Weiand action + long pump #9240
• Carburetor: Quick Fuel 750CFM mechanical secondary no choke #Q-750
• Fuel Pump: Holley mechanical 110GPH #12-327-11
• Spark Plugs: Autolite #3923
• Spark Plug Wires: 8mm

Engine Info:
• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N per application
• Timing: 34-36 Degrees
• Spark Plug Gap: .035”
• Firing Order: 18436572
• Octane: 91+
• Stall Converter: 2800+
• Exhaust: 1 ¾ 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.

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ATK HP36 Chevy 383 Stroker Base Engine 435HP https://atkhp.com/product/atk-hp36-chevy-383-stroker-base-engine-435hp/ https://atkhp.com/product/atk-hp36-chevy-383-stroker-base-engine-435hp/#respond Wed, 17 May 2023 16:06:37 +0000 https://atkhp.com/?post_type=product&p=4531 Engine Specifications: • HP: 435 • TQ: 475 • 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: […]

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Engine Specifications:
• HP: 435
• TQ: 475
• 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: Forged 10:1 compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: 220/224 @50 .528in/.536ex 110LSA
• Timing Chain: Double roller
• Cylinder Heads: Dart SHP aluminum 72cc/180cc 2.02/1.60
• 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: Edelbrock performer RPM dual plane #7101
• Distributor: HEI (Iron Gear)
• Water Pump: OE long pump
• Carburetor: Quick Fuel 680CFM vacuum secondary’s electric choke #HR-680
• Fuel Pump: Holley mechanical 110GPH #12-327-11
• Spark Plugs: Autolite #3923
• Spark Plug Wires: 8mm

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.

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ATK HP57 Chevy 350 Base Engine 1987-1991 Corvette https://atkhp.com/product/atk-hp57-chevy-350-base-engine-1987-1991-corvette/ https://atkhp.com/product/atk-hp57-chevy-350-base-engine-1987-1991-corvette/#respond Wed, 17 May 2023 15:28:25 +0000 https://atkhp.com/?post_type=product&p=4521 This engine is a performance replacement for 87-91 Corvettes, smooth idle great daily driver. Engine Specifications: • HP: 289 • TQ: 370 • Block: OE roller block 4 bolt main 1pc seal 1996-2000 • Bore/Stroke: 4.040” x 3.480” • Displacement: 350CI • Crankshaft: OE Reground external balance rear of the crank/internal balance front of the […]

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This engine is a performance replacement for 87-91 Corvettes, smooth idle great daily driver.

Engine Specifications:
• HP: 289
• TQ: 370
• Block: OE roller block 4 bolt main 1pc seal 1996-2000
• Bore/Stroke: 4.040” x 3.480”
• Displacement: 350CI
• Crankshaft: OE Reground external balance rear of the crank/internal balance front of the crank
• Rods: OE powder metal 5.7”
• Pistons: Hypereutectic 10:1 Compression
• Rings: Moly
• Camshaft: Hyd. Roller
• Cam Specs: 207/214 @50 .411in/.428ex 112LSA
• Timing Chain: Double Roller
• Cylinder Heads: Edelbrock performer aluminum 60cc/165cc 2.02/1.60
• Rocker Arms: Stamped steel rockers 1.6 ratio
• Oil Pan: Rear sump 5qt (Standard SBC oil pan, may not fit some Corvette’s. If not, you must use your original oil pan)
• Oil Pump: Melling STD Volume

Recommended Components:
• Flexplate/Flywheel: Externally Balanced – Pioneer #FRA-159
• Balancer: Internally Balanced – PowerBond 6.75” #PB2221-N
• Intake Manifold: Stock TPI Intake
• Distributor: Stock Distributor (Iron Gear)
• Water Pump: Stock
• Fuel Pump: Stock
• Spark Plugs: Autolite #3926
• Spark Plug Wires: Stock

Engine Info:
• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N
• Timing: 34-36 Degrees (set with ECM)
• Spark Plug Gap: .035”
• Firing Order: 18436572
• Octane: 91+
• Stall Converter: Stock
• 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.

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ATK HP33 Chevy 383 Vortec Stroker Base Engine 390HP https://atkhp.com/product/atk-hp33-chevy-383-stroker-base-engine-380hp/ https://atkhp.com/product/atk-hp33-chevy-383-stroker-base-engine-380hp/#respond Wed, 17 May 2023 15:18:05 +0000 https://atkhp.com/?post_type=product&p=4508 Engine Specifications: • HP: 390 • 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: […]

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Engine Specifications:
• HP: 390
• 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 9.5:1 compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: 220/224 @50 .495in/.502ex 110LSA
• Timing Chain: Double roller
• Cylinder Heads: Dart vortec cast iron 67cc/165cc 2.02/1.60
• Rocker Arms: Stamped steel 1.5 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: Edelbrock performer RPM dual plane #7116
• Distributor: HEI (Iron Gear)
• Water Pump: OE long pump
• Carburetor: Quick Fuel 680CFM Vacuum secondary’s electric choke #HR-680
• Fuel Pump: Holley mechanical 110GPH #12-327-11
• Spark Plugs: Autolite #605
• Spark Plug Wires: 8mm

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

 

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.

 

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ATK HP94 Chevy 383 Stroker Base Engine 415HP https://atkhp.com/product/atk-hp94-chevy-383-stroker-base-engine-415hp/ https://atkhp.com/product/atk-hp94-chevy-383-stroker-base-engine-415hp/#respond Wed, 17 May 2023 15:14:29 +0000 https://atkhp.com/?post_type=product&p=4506 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: […]

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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.

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ATK HP05 Chevy 1987-1995 TBI 383 Stroker Base Engine https://atkhp.com/product/atk-hp05-chevy-1987-1995-tbi-383-stroker-base-engine/ https://atkhp.com/product/atk-hp05-chevy-1987-1995-tbi-383-stroker-base-engine/#respond Wed, 17 May 2023 15:10:59 +0000 https://atkhp.com/?post_type=product&p=4504 This engine was designed to run in a 1987-1995 Chevy Pickup with the TBI 350CI engine. You must have a chip burned and headers to achieve the power ratings. Engine Specifications: • HP: 320 • TQ: 395 • Block: OE roller block 4 bolt main 1pc seal 1996-2000 • Bore/Stroke: 4.040” x 3.750” • Displacement: […]

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This engine was designed to run in a 1987-1995 Chevy Pickup with the TBI 350CI engine. You must have a chip burned and headers to achieve the power ratings.

Engine Specifications:
• HP: 320
• TQ: 395
• 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 9.5:1 Compression
• Rings: Moly
• Camshaft: Hyd. Roller
• Cam Specs: 198/210 @50 .435in/.462ex 116LSA
• Timing Chain: Double Roller
• Cylinder Heads: OE TBI Cast Iron 67cc 1.94/1.50
• Rocker Arms: Stamped Steel 1.5
• 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

Recommended Components:
• Balancer: Internally Balanced – PowerBond #PB1046-N
• Flexplate/Flywheel: Externally Balanced – Pioneer #FRA-159 (with Scat kit)
• Intake Manifold: OE or Edelbrock TBI Intake #3704
• Spark Plugs: Autolite #25
• Spark Plug Wires: Factory Replacements
• Water Pump: OE

Engine Info:
• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N
• Timing: Set To Factory Specifications Via PCM Module – Must have Performance Chip Burned
• Spark Plug Gap: .035”
• Firing Order: 18436572
• Octane: 91+
• Stall Converter: Stock
• Exhaust: 1 5/8 Headers

Notes: Engine is meant for the 1987-1995 Chevy Trucks with a 350 TBI engine. ECM needs a chip burned to run properly.

 

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.

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ATK HP89 Chevy 350 Base Engine 390HP https://atkhp.com/product/atk-hp89-chevy-350-base-engine-390hp/ https://atkhp.com/product/atk-hp89-chevy-350-base-engine-390hp/#respond Wed, 17 May 2023 15:04:41 +0000 https://atkhp.com/?post_type=product&p=4498 Great crate engine with a noticeable idle, very street able with lots of power. Engine Specifications: • HP: 390 • TQ: 420 • Block: OE roller block 4 bolt main 1pc seal 1996-2000 • Bore/Stroke: 4.040” x 3.480” • Displacement: 350CI • Crankshaft: OE Reground external balance rear of the crank/internal balance front of the […]

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Great crate engine with a noticeable idle, very street able with lots of power.

Engine Specifications:
• HP: 390
• TQ: 420
• Block: OE roller block 4 bolt main 1pc seal 1996-2000
• Bore/Stroke: 4.040” x 3.480”
• Displacement: 350CI
• Crankshaft: OE Reground external balance rear of the crank/internal balance front of the crank
• Rods: OE powder metal 5.7”
• Pistons: Hypereutectic 10:1 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

Recommended Components:
• Flexplate/Flywheel: Externally Balanced – Pioneer #FRA-159
• Balancer: Internally Balanced – PowerBond #PB1046-N
• Intake Manifold: ATK dual plane intake
• Distributor: HEI (Iron Gear)
• Water Pump: OE long pump
• Carburetor: Quick Fuel 680CFM Vacuum secondary’s electric choke #HR-680
• Fuel Pump: Holley mechanical 110GPH #12-327-11
• Spark Plugs: Autolite #3923
• Spark Plug Wires: 8mm

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.

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ATK HP98 Chevy 350 Base Engine 345HP https://atkhp.com/product/atk-hp98-chevy-350-base-engine-345hp/ https://atkhp.com/product/atk-hp98-chevy-350-base-engine-345hp/#respond Wed, 17 May 2023 15:02:14 +0000 https://atkhp.com/?post_type=product&p=4495 Engine Specifications: • HP: 345 • TQ: 400 • Block: OE block 4 bolt main 1pc seal 1987-2000 • Bore/Stroke: 4.040 x 3.480 • Displacement: 350 • Crankshaft: OE Reground external balance rear of crank/internal balance front of the crank • Rods: OE powder metal 5.7” • Pistons: Hypereutectic 9.1:1 compression • Rings: Moly • […]

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Engine Specifications:
• HP: 345
• TQ: 400
• Block: OE block 4 bolt main 1pc seal 1987-2000
• Bore/Stroke: 4.040 x 3.480
• Displacement: 350
• Crankshaft: OE Reground external balance rear of crank/internal balance front of the crank
• Rods: OE powder metal 5.7”
• Pistons: Hypereutectic 9.1:1 compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: 220/224 @50 .495in/.502ex 110LSA
• Timing Chain: Double roller
• Cylinder Heads: ATK cast iron 76cc/165cc 1.94/1.50
• Rocker Arms: Stamped steel 1.5 ratio
• Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s)
• Oil Pump: Melling high volume

Recommended Components:
• Balancer: PowerBond internal balance 8” #PB1046-N
• Flexplate/Flywheel: Pioneer #FRA-159 external balance 168 tooth
• Intake Manifold: Weiand stealth dual plane #8150
• Distributor: HEI (Iron gear)
• Water Pump: OE long pump
• Carburetor: Quick Fuel 680CFM vacuum secondary’s with electric choke #HR-680
• Fuel Pump: Holley mechanical 110GPH #12-327-11
• Spark Plugs: Champion #RV12C
• Spark Plug Wires: 8mm

Engine Info:
• Oil: Conventional / Non synthetic 10W30 with Comp Cam zinc additive #159 for first 3000 miles
• Oil Filter: Wix or K&N per application
• Timing: 34-36 Degrees
• Spark Plug Gap: .035”
• Firing Order: 18436572
• Octane: 91+
• Stall Converter: 2200-2500
• 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.

The post ATK HP98 Chevy 350 Base Engine 345HP appeared first on ATK High Performance Engine.

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