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ATK Engines HP55C

ATK Engines High Performance Crate Engine Small Block Chevy 383ci / 500HP / 505TQ


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ATK Engines High Performance Crate Engine Small Block Chevy 383ci / 500HP / 505TQ $7,420.00
Out of stock
High Performance Crate Engine
  • Small Block Chevy 383ci
  • 500HP / 505TQ
  • Complete Engine
  • Carburetor
  • ATK Engines HP55C Details

    Complete Engine

    Engine Info

    • Balancer: Internal balance 8"
    • Carburetor: Quick Fuel 750cfm mechanical secondary no choke #793-Q-750
    • Distributor: Pro billet (iron gear)
    • Exhaust: 1-3/4" Headers
    • Firing Order: 18436572
    • Flexplate: External balance 168 tooth
    • Fuel Pump: Holley Mechanical 110gph #510-12-327-11
    • Intake Manifold: Edelbrock Performer RPM Air Gap #350-7501
    • Octane: 91+
    • Oil: 10W30 (Conventional / Non Synthetic) 
    • Oil Filter: Wix or K&N
    • Spark Plug Gap: .035"
    • Spark Plugs: Autotile #417-3923
    • Spark Plug Wires: 8mm
    • Stall Converter: 2800+
    • Timing: 34-36 Degrees 
    • Water Pump: Weiand Action+ long pump #925-9240

     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. 



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    High-Performance 383 Stroker for Street/Strip 

    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 has 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.

    Bulletproof street/strip engine with a lopey idle, may not work with power brakes or a/c.

    Engine Specifications

    • Horsepower: 500 hp
    • Torque: 505 lb/ft

    Block Information:

    • Seasoned OE 4 bolt main 1pc seal 1996-2000 
    • Bore/Stroke: 4.040" x 3.750"
    • Displacement: 383ci

    Rotating Assembly:

    • Crankshaft: Scat 4340 forged
    • Balance: External rear, internal front
    • Rods: Scat 4340 forged H beam 5.7" with ARP 8740 bolts
    • Compression Ratio: 10.2:1
    • Pistons: Forged
    • Rings: Moly

    Camshaft Specs:

    • Camshaft: Hydraulic roller
    • Cam Duration @ .050": Intake 237 / Exhaust 245
    • Cam Lift: Intake .597" / Exhaust .597"
    • Lobe Separation Angle: 112lsa
    • Timing Chain: Double roller

    Cylinder Head Information:

    • Cylinder Heads: Dart SHP American Made Aluminum
    • Combustion Chamber: 72cc
    • Intake Runner: 200cc
    • Valve Size: 2.02" Intake / 1.60" Exhaust
    • Rocker Arms: Biller aluminum roller rockers 1.6 ratio

    Oil Pan Information:

    • Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some Corvettes, and 1962-1967 Chevy II's
    • Oil Pump: Melling 

     Base Engines

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

    Mid Dress Engines

    • Consists of Base Engine Build
    • Intake Manifold
    • Distributor
    • Water Pump 
    • Harmonic Balancer

    Complete Engines

    • Consists of Mid Dress Engine Build
    • Fuel Pump
    • Carburetor or EFI 
    • Spark Plug Wires
    • Spark Plugs

    Does this 383 stroker HP55C come complete?

    Asked by: New York
    Hello, it will come exactly as you see it in the picture. Carburetor to pan, dyno tested and tuned.
    Answered by: ATK HP Engines
    Date published: 2019-03-31
    • y_2019, m_10, d_20, h_7CST
    • bvseo_bulk, prod_bvqa, vn_bulk_2.0.13
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