This ATK HP57 Chevy 350CI 87-91 Corvette Engine Base is an upgrade to your old ride. Designed as a replacement for 87-91 Corvettes, it delivers 370 ft.lb torque for improved driving experience. Its smooth idle and consistency is perfect for everyday drivers.
- Horsepower: 289
- Torque: 370 lbs./ft.
- Block: Seasoned OE 4 Bolt Main 1pc Seal Roller Block P/S Dipstick
- Bore/Stroke: 4.040 x 3.480
- Year Range: 1987-1991
- Displacement: 350 C.I.D.
- Crankshaft: OE Cast Crank 3.480" Stroke Externally Balanced Rear/Internal Front 1pc.
- Connecting Rods: OE Powder Metal 5.700" Stock Bolts
- Pistons: Hypereutectic Dished
- Piston Rings: Moly Rings
- Compression Ratio: 10.0:1 Compression
- Camshaft: Hydraulic Roller
- Camshaft Specifications: 207/214 @050 .411in/.428ex 117LSA
- Camshaft Bearings: Installed & Clocked to OEM Position
- Cylinder Heads: Edelbrock Performer Aluminum 60cc/165cc 2.02/1.60
- Freeze Plugs: Brass Installed & Sealed
- Rocker Arms: Stamped Steel 1.6 Ratio
- Oil Galley Plugs: Installed & Sealed
- Oil Pan: OE 5qt.
- Weight: 350
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 350 289 HP Corvette Long Block Crate Engines
• Oil: 10W30
• Oil Filter: Wix or K&N Recommended Per Your Application
• Fuel Delivery: OE EFI System
• Intake Manifold: Edelbrock High-Flo TPI
• Fuel Injectors: Stock Injectors
• Spark Plugs: Autolite #3926
• Spark Plug Gap: .035"
• Harmonic Balancer/Damper: POWERBOND Internally Balanced 8" #PB1046-N
• Flex Plate / Flywheel: Externally Balanced 168 Tooth
• Timing: 34-36 Degrees Total
• Water Pump: Per Application
• Firing Order: 1 8 4 3 6 5 7 2
• Exhuast: 1 5/8 Headers
• Fuel Pump: Stock
• Fuel: 91+ Octane
• Ignition: Stock
• Automatic Transmission Stall Converter: Stock
• Balancer: 6.75" internal balance
• Distributor: Stock (iron gear)
• Flexplate/Flywheel: External balance 168 tooth
• Intake Manifold: Stock TPI intake
• Fuel Pump: Stock
• Spark Plugs: Autolite #417-3926
• Spark Plug Wires: Stock
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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