ATK Engines High Performance Crate Engine Small Block Chevy 350ci / 330HP / 380TQ
059-HP291PM
Mid Dress Engine
ATK Core Return Process
JEGS and ATK appreciate your business and want to ensure that your core return is as smooth as possible.
Please CLICK HERE for ATK Core Return Process
NOTE:
- Core return can be any Small Block Chevy 350ci engine, except 1992-1997 LT1 style engines
Engine Specifications:
- Horsepower: 330
- Torque: 380
- Block: 1987-2000 OE block 4-bolt main 1-piece seal
- Bore/Stroke: 4.040 x 3.480
- Displacement: 350
- Crankshaft: OE Reground external balance rear of crank/internal balance front of the crank
- Rods: OE powder metal 5.700 in.
- Pistons: Hypereutectic 9.1:1 compression
- Rings: Moly
- Camshaft: Hyd. flat tappet
- Cam Specs: 224/234 @ 50 .465 in/.488 ex 112 LSA
- Timing Chain: Double roller
- Cylinder Heads: Dart cast iron 76cc/165cc 1.94/1.50
- Rocker Arms: Stamped steel 1.5 ratio
- Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some Corvettes and 1962-1967 Chevy II’s)
- Oil Pump: Melling high volume
- Balancer: PowerBond internal balance 8 in. #PB1046-N
- Flexplate/Flywheel: Pioneer #FRA-159 external balance 168 tooth
- Intake Manifold: ATK dual plane intake
- Distributor: HEI (Iron gear)
- Water Pump: OE long pump
Recommended Components:
- Carburetor: Quick Fuel 680 CFM vacuum secondary’s with electric choke #HR-680
- Fuel Pump: Holley mechanical 110 GPH #12-327-11
- Spark Plugs: Champion #RV12C
- Spark Plug Wires: 8 mm
Engine Info:
- Oil: Conventional / Non-Synthetic 10W30 with Comp Cam zinc additive #159 for first 3000 miles
- Oil Filter: Wix or K&N per application
- Timing: 34-36 Degrees
- Spark Plug Gap: .035 in.
- Firing Order: 18436572
- Octane: 91+
- Stall Converter: 2200-2500
- Exhaust: 1 5/8 in. Headers
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 in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.
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:
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
Classic 350 engine with great street manners, and vacuum for all your power accessories.
- Horsepower: 330 hp
- Torque: 380 lb/ft
Block Information:
- Seasoned OE 4 bolt main 1pc seal 1987-2000
- 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: 9.1:1
- Pistons: Hypereutectic
- Rings: Moly
Camshaft Specs:
- Camshaft: Hydraulic flat tappet
- Cam Duration @ .050": Intake 224 / Exhaust 234
- Cam Lift: Intake .465" / Exhaust .488"
- Lobe Separation Angle: 112lsa
- Timing Chain: Double roller
Cylinder Head Information:
- Cylinder Heads: Dart cast iron
- Combustion Chamber: 76cc
- Intake Runner: 165cc
- Valve Size: 1.94" Intake / 1.50" Exhaust
- Rocker Arms: Stamped steel 1.5
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 high volume
Base Engines
- Short Block
- Camshaft
- Timing Set
- Cylinder Heads
- Valve Covers
- Timing Cover
- Oil Pan
- Oil Pump & Pickup Tube
Mid Dress Engines
- Consists of Base Engine Build
- Intake Manifold
- Distributor
- Water Pump
- Harmonic Balancer
- Flex Plate
Complete Engines
- Consists of Mid Dress Engine Build
- Fuel Pump
- Carburetor or EFI
- Spark Plug Wires
- Spark Plugs
Given I am looking to have a carbureted motor in my 95 S-10 opting out of the computer injector system currently have a V-6 vortec engine, will this motor marry up transmission wise with this V-8? the current tranny already has shift kits and overdrive
does this fit a 1977 corvette
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
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Electrical Cords
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