ATK Engines HP97 High Performance Crate Engine GM LM7 5.3L [385 HP/390 TQ]
059-HP97
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LS 5.3L Crate Engine
ATK HP97 High Performance Crate Engine:
- Horsepower: 385
- Torque: 390
- Block: GM 5.3L iron LM7
- Bore/stroke: 3.809 x 3.622
- Year Range: 1999-2007
- Displacement: 323 c.i.
- Crankshaft: OEM GM 3.622 in. stroke internally balanced 24 tooth reluctor wheel .857 in. flange
- Connecting rods: OE GM forged powder metal 6.093 in. stock bolts
- Pistons: Hypereutectic dish
- Piston rings: Moly
- Compression ratio: 9.5:1
- Camshaft: Hydraulic roller
- Camshaft specifications: Custom grind
- Camshaft bearings: Installed and clocked to OEM position
- Cylinder heads: OE aluminum 61.15cc w/1.89/1.55 in. valves
- Freeze plugs: Brass installed and sealed
- Rocker arms: OE powdered metal 1.7 ratio
- Oil Galley plugs: Installed and sealed
- Weight: 385 lbs.
FAQ
Is it better to buy a crate engine or rebuild?
- It depends on specific needs. Crate engines like the ATK HP97 offer convenience, while rebuilding allows customization.
- Crate engines save time, while rebuilds offer tailored performance.
How much horsepower can you get out of a 5.3 LS?
- With modifications, a built 5.3 LS engine, such as the ATK 5.3, can reach over 400-500 horsepower reliably.
- Performance upgrades enhance the 5.3's power potential.
Which GM LS engine has the most horsepower?
- The L33 crate engine is among the powerful LS engines, delivering impressive horsepower and torque.
- Its stock form offers robust performance for various applications.
Specifications:
does this engine need a tune or can it just be swapped and and everything be fine.
Will this work on Monte Carlo as 5.3ls
Unfortunately I live in a state that hates cars, even though it’s where the car scene started. Is this engine CARB approved?
Will this fit my 2003 Silverado 1500 LT? And will there be any modifications to the harness or any other equipment?
Will this fit a 2004 Chevy silverado 1500 4.8 ?
Would this fit in my 06 Chevy 1500?
It says it requires 91+, but could I run on 89 octane?
Will this be a direct replacement for a 07 flex fuel 5.3 and what are the cam specs for the motor
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