The ATK HP411PM Chevy 489 Stroker Engine is perfect for owners, who do not want to compromise on power. This crate engine features 565 horsepower and 595 lb/ft torque to offer great speed and pulling power, and the included harmonic balancer reduces engine vibration. This long block mid-dressed engine includes cylinder heads, distributor, oil pan, valve covers, timing cover, water pump, harmonic balancer and flexplate.
- Horsepower: 565
- Torque: 595 lb/ft
- Block: Seasoned OE 4 Bolt Main 1pc Seal Gen V 1991-1995
- Bore/Stroke: up to 4.310 x 4.250
- Displacement: 489 C.I.D.
- Crankshaft: Scat Nodular Iron 4.250" Stroke Internally Balanced 1pc.
- Connecting Rods: Scat 4340 Forged I Beam 6.385" ARP 8740 Bolts
- Pistons: Forged Small Dome
- Piston Rings: Moly Rings
- Compression Ratio: 10.1:1 Compression
- Camshaft: Hydraulic Roller
- Camshaft Specifications: 237/245 @050 .635in/.640ex 112LSA
- Camshaft Bearings: Installed & Clocked to OEM Position
- Cylinder Heads: Edelbrock Aluminum E-Street 110cc/290cc 2.19/1.88
- Freeze Plugs: Brass Installed & Sealed
- Rocker Arms: Billet Aluminum 1.7 Full Roller
- Oil Galley Plugs: Installed & Sealed
- Oil Pan: OE 5qt.
ATK specializes in muscle. With the highest quality internal parts and Dyno Proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty.
ATK High Performance GM 489 Stroker 565 HP Stage 2 Long Block Crate Engines
• Oil: 10W30
• Oil Filter: Wix or K&N Recommended Per Your Application
• Fuel Delivery : Quick Fuel Carburetor 780cfm #HR-780-VS
• Intake Manifold: Edelbrock Performer RPM Dual Plane #7161
• Spark Plugs: Autolite #3923
• Spark Plug Gap: .035"
• Harmonic Balancer/Damper: Professional Products Internally Balanced 8" #80004
• Flex Plate / Flywheel: Internally Balanced 168 Tooth
• Timing: 34-36 Degrees Total
• Water Pump: Long Water Pump
• Firing Order: 1 8 4 3 6 5 7 2
• Exhuast: 2 Headers
• Fuel Pump: No Mechanical Fuel Pump Provisions, Must run Electric
• Fuel: 91+ Octane
• Ignition: MSD HEI #8362
• Automatic Transmission Stall Converter: 2500-3200
• Carburetor: Quick Fuel 780cfm vacuum secondary electric choke #793-HR-780-VS
• Fuel Pump: No mechanical fuel pump provision, must run an electric pump
• Spark Plugs: Autotile #417-3923
• Spark Plug Wires: 8mm
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 for their application. Some modifications to the vehicle may be required using these and or other aftermarket parts.
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