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ATK Engines HP57

ATK Engines High Performance Crate Engine 1987-1991 Corvette 350ci / 289HP / 370TQ

059-HP57

made in usa
Free Shipping Ships directly from the manufacturer on 11/29/19
Save $10 off $199, $45 off $499, $100 off $999. Promo Code: FALLFUN exclusions apply

$3,890.99
ATK Engines High Performance Crate Engine 1987-1991 Corvette 350ci / 289HP / 370TQ $3,890.99
Out of stock
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High Performance Crate Engine
  • 1987-1991 Corvette C4
  • Small Block Chevy 350ci
  • 289HP / 370TQ
  • Base Engine
  • ATK Engines HP57 Details

    Engine Info

    • Exhaust: 1-5/8" Headers
    • Firing Order: 18436572
    • Octane: 91+
    • Oil: 10W30 (Conventional / Non Synthetic) with zinc additive for first 3000 miles
    • Oil Filter: Wix or K&N
    • Spark Plug Gap: .035"
    • Stall Converter: Stock
    • Timing: 34-36 Degrees 

    Recommended Components

    • 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 the power figures listed. Power figures can vary based on parts used by the end user. Some modifications to the vehicle may be required using these and or other aftermarket parts.

    Engine Break-In Procedure

    Use or break-in oil or conventional (non-synthetic) 10w30 oil with zinc additive for the first 500 miles of operation.  Do not drive for long periods at any single speed, always vary your speed. Do not tow a trailer or put other heavy loads on the vehicle. It is best to avoid long periods of idling during this period. Check the engine oil and coolant levels daily. 

    Engines with flat tappet hydraulic cams only - Run the engine between 2,000 and 2,500 RPM's, with no-load on the engine for the first 30 minutes. Let the engine cool down completely and repeat process 2-3 more times. Do not idle the engine for any extended period at this time, this is critical to break in the camshaft.

    At 500 Miles change the engine oil and filter using conventional (non-synthetic) oil with a zinc additive. Check fuel and ignition settings, adjust valves (where applicable).  Drive the next 500 miles normally, without high RPM's (below 5000 RPM), hard use, or extended periods of high loading or long periods of idling.

    Change the oil and oil filter again at 1,000 miles. Continue using conventional (non-synthetic) oils and zinc additive, until about 4,000 miles. At that point, you may run a quality 10w30 synthetic oil if you choose. Use of oil with zinc or a zinc additive for the life of your engine is recommended. 

     

    Specifications:

    Quantity
    Sold individually
    Manufacturer's Part Number:
    HP57
    Shipping Weight:
    386
    Package Height:
    36
    Package Depth:
    36
    Package Width:
    36

    In 2007, ATK launched a High Performance Division with one of the finest engine shops in the country. By reverse engineering all of their engines, they are able to eliminate any OEM deficiencies. This makes an ATK built crate engine have a superior design over the original engine by incorporating better components when needed. These quality built engines are offered in three different stages for ease of finishing an engine swap. ATK HP engines feature a 24 month/unlimited mile warranty.


    Engine Specifications

    This engine is a performance replacement for 1987-1991 Corvettes, with a smooth idle it makes for a great daily driver.

    • Horsepower: 289 hp
    • Torque: 370 lb/ft

    Block Information:

    • Seasoned OE 4 bolt main 1pc seal 1996-2000 
    • Bore/Stroke: 4.040" x 3.480"
    • Displacement: 350ci

    Rotating Assembly:

    • Crankshaft: OE Reground 1 piece seal crank
    • Balance: External rear, internal front
    • Rods: OE powder metal 5.7"
    • Compression Ratio: 10.0:1
    • Pistons: Hypereutectic
    • Rings: Moly

    Camshaft Specs:

    • Camshaft: Hydraulic flat tappet
    • Cam Duration @ .050": Intake 207 / Exhaust 214
    • Cam Lift: Intake .411" / Exhaust .428"
    • Lobe Separation Angle: 112lsa
    • Timing Chain: Double roller

    Cylinder Head Information:

    • Cylinder Heads: Edelbrock Performer aluminum
    • Combustion Chamber: 60cc
    • Intake Runner: 165cc 
    • Valve Size: 2.02" Intake / 1.60" Exhaust
    • Rocker Arms: Stamped steel 1.6 ratio

    Oil Pan Information:

    • 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 standard volume

     Base Engines

    • Short Block
    • Camshaft
    • Timing Set
    • Cylinder Heads
    • Valve Covers
    • Timing Cover
    • Oil Pan
    • Oil Pump & Pickup Tube

    Does ATK Engines HP57 fit your vehicle?

    Narrow Results

    1987-1991  CHEVROLET CORVETTE

    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: ALL
    • Engine Vin: 8
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1990-1991  CHEVROLET CORVETTE

    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: ALL
    • Engine Vin: J
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1991  CHEVROLET CORVETTE

    • Liter: 5.7
    • Aspiration: NATURALLY ASPIRATED
    • SubModel: ALL
    • Engine Vin: -
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    is the engine designed to be a direct drop in fit for the 87' vette year? and is it completely assembled ?

    Asked by: Terry98
    This engine is a performance replacement for 87-91 Corvettes, smooth idle great daily driver. Your engine may not necessarily come with all components listed, but they are listed as our recommendations of parts to run for optimal performance.
    Answered by: ATK HP Engines
    Date published: 2019-03-02
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    • loc_en_US, sid_10001_10001_5158185, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs
    Some parts are not legal for use in California or other states with similar laws / regulations

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