- Engines & Components
- Engine - Assembled / Ready-to-Run
- ATK HP Crate Engines Small Block Chevy 383ci / 460HP / 490TQ
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.
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This engine was designed to perform on the street or strip without having to worry about reliability. It WILL NOT produce enough vacuum for power brakes.
Engine Specifications
- Horsepower: 460 hp
- Torque: 490 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 Nodular Iron
- Balance: External rear, internal front
- Rods: Scat 4340 forged I beam 5.7" with ARP 8740 bolts
- Compression Ratio: 10:1
- Pistons: Forged
- Rings: Moly
Camshaft Specs:
- Camshaft: Hydraulic roller
- Cam Duration @ .050": Intake 224 / Exhaust 236
- Cam Lift: Intake .591" / Exhaust .591"
- Lobe Separation Angle: 108lsa
- Timing Chain: Double roller
Cylinder Head Information:
- Cylinder Heads: Dart SHP American Made Aluminum
- Combustion Chamber: 72cc
- Intake Runner: 200 cc
- 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 standard volume
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
Notes: This engine will NOT produce enough vacuum for power brakes.
Vacuum:
- 8" @ 800 rpms
- 10" @ 1000 rpms
- 15" @ 1500 rpms
- 17" @ 2500 rpms