Description
ATK Engines HP97 Chevy LM7 5.3L 99-07 Truck Base Engine 385HP
This engine was designed to be a performance upgrade for a 1999-2007 Chevy Truck LM7 or LS swap in a hot rod. Expect big mid to upper end power, will have a noticeable idle. For optimal Performance you will need headers, chassis dyno tune and upgraded injectors. Cam Specs will come with the engine.
Engine Specifications:
- HP: 385
- TQ: 390
- Block: Seasoned OE LM7/5.3L iron
- Bore/Stroke: Up to 3.809 x 3.622
- Displacement (cu.in): 323
- Crankshaft: OEM GM 24 tooth reluctor wheel
- Rods: Stock GM
- Pistons: Hypereutectic 9.5:1 compression
- Rings: Moly
- Camshaft: Hyd. roller
- Cam Specs: Custom performance grind
- Cylinder Heads: OE aluminum 61.15cc 1.89″/1.55″ valves Rocker Arms: OE powdered metal 1.7 ratio
| KEY SPECS | |
|---|---|
| MFG. Part # | HP97 |
| Brand | ATK Engines |
| Crate Engine Type | Long Block |
| Engine Displacement | 5.3 cu. in. |
| Horsepower | 385 horsepower |
| Compression Ratio | 9.5:1 |
| Torque | 390 ft./lbs. |
| Camshaft Type | Hydraulic Roller |
| Cylinder Head Material | Aluminum |
| Piston Material | Hypereutectic Aluminum |
| Carburetor Included | No |
| Intake Manifold Included | No |
| Distributor Included | No |
| Valve Covers Included | No |
| Cylinder Heads Included | Yes |
| Throttle Body Included | No |
| Oil Pan Included | No |
| Timing Cover Included | No |
| Water Pump Included | No |
| Harmonic Balancer Included | No |
| Flexplate Included | No |
| Flywheel Included | No |
| Air Cleaner Included | No |
| Spark Plugs Included | No |
| Spark Plug Wires Included | No |
| Computer Included | No |
| Wiring Harness Included | No |
| Recommended Fuel | Premium |
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