ATK Engines High Performance Crate Engine GM LS 383ci 515HP / 505TQ
059-LM7-LB-3
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Engine Info
- Exhaust: 1-5/8"+ Headers
- Firing Order: 18726543
- Octane: 91+
- Oil: 10W30
- Oil Filter: Wix or K&N
- Spark Plug Gap: .040"
- Stall Converter: 2500+
- Timing: Set to factory specifications via PCM module (Tune Required)
Recommended Components
- Balancer: Stock internal balance/per application
- Intake Manifold: Stock EFI, aftermarket EFI, or carbureted intake
- Flexplate/Flywheel: Stock internal balance
- Fuel Pump: Electric per application
- Fuel Injectors: 36lb injectors
- Spark Plugs: NGK #739-TR5GP
- Spark Plug Wires: Factory
- Water Pump: Per application
Notes: This engine can replace the 1999-2007 Chevy 5.3L LM7 engine with supporting modifications or any other factory LS equipped vehicle. It can also be retrofitted for an aftermarket EFI/Carb setup. ECM must be tuned, not doing so can damage the engine.
Disclaimer: 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 conventional or break-in oil (non-synthetic) for the first 600 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. Check the engine oil and coolant levels daily.
At 600 Miles change the engine oil and filter using conventional (non-synthetic) oil. Check fuel and ignition settings; adjust valves (where applicable).
After the first 5,000 of service synthetic engine oil may be used. Follow your vehicle owner’s manual for service intervals.
Specifications:
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:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.