ATK HP97 Chevy LM7 5.3L 99-07 Truck Base Engine 385HP
ATK HP97 Chevy LM7 5.3L 99-07 Truck Base Engine 385HP
• HP: 385
• TQ: 390
• Block: Seasoned OE LM7/5.3L iron
• TQ: 390
• Block: Seasoned OE LM7/5.3L iron
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Quick Overview:
Notes: 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 (required) and upgraded injectors. Cam Specs will come with the engine.
Details
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.
Specs
Part Number
HP97
Block
• Block: Seasoned OE LM7/5.3L iron
• Bore/Stroke: Up to 3.809 x 3.622
• Displacement (cu.in): 323
• Bore/Stroke: Up to 3.809 x 3.622
• Displacement (cu.in): 323
Short Block Features
• 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
• Rods: Stock GM
• Pistons: Hypereutectic 9.5:1 compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: Custom performance grind
Camshaft Advertised Duration
Custom
Camshaft Duration @ .050"
Custom
Camshaft Lift
Custom
Heads
• Cylinder Heads: OE aluminum 61.15cc 1.89”/1.55” valves
• Rocker Arms: OE powdered metal 1.7 ratio
• Rocker Arms: OE powdered metal 1.7 ratio
Additional Parts Included
Recommended Components:NOT INCLUDED
• Oil- 5W30
• Fuel System – OE EFI System
• Intake – Stock Fuel Injected
• Balancer- Stock Internally Balanced
• Flex plate/Flywheel- Stock Internally Balanced
• Spark Plug- Stock
• Spark Plug Gap- .035”
• Timing- Set To Factory Specifications Via PCM Module (Tune Required)
• Firing Order- Stock
• Fuel – 91 Octane
• Recommended Stall Converter- stock or 1800
• Exhaust- 1 5/8 or 1 3/4 Headers
• Oil- 5W30
• Fuel System – OE EFI System
• Intake – Stock Fuel Injected
• Balancer- Stock Internally Balanced
• Flex plate/Flywheel- Stock Internally Balanced
• Spark Plug- Stock
• Spark Plug Gap- .035”
• Timing- Set To Factory Specifications Via PCM Module (Tune Required)
• Firing Order- Stock
• Fuel – 91 Octane
• Recommended Stall Converter- stock or 1800
• Exhaust- 1 5/8 or 1 3/4 Headers
Horsepower
385
Torque
390
Warranty
Notes: 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 (required) and upgraded injectors. Cam Specs will come with the engine.
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.
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.
PROPOSITION 65 WARNING:
Crude oil, gasoline, diesel fuel and other petroleum products can expose you to chemicals including toluene and benzene, which are known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to www.p65warnings.ca.gov.
For more information go to www.p65warnings.ca.gov.
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