ATK HP116C-EFI Chevy LM7 5.3L 500HP with FITECH EFI

Description

Engine Specifications:
• HP: 500
• TQ: 440
• Block: OE LM7/5.3L Iron
• Bore/Stroke: up to 3.903” x 3.622
• Displacement (cu.in): 347ci
• Crankshaft: OE GM 24 tooth reluctor wheel
• Rods: OE powder metal
• Pistons: Hypereutectic 10:1 compression
• Rings: Moly
• Camshaft: Hyd. Roller
• Cam Specs: Custom performance grind
• Timing Chain: OE single roller
• Cylinder Heads: AFR CNC ported aluminum 59cc/200cc 2.000”in/1.570”ex
• Rocker Arms: OE 1.7 ratio
• Oil Pump: Melling M295
• EFI System: FITECH Ultra port injection LS1 750HP with transmission control (wiring harness & ECM/TCM included)
• Fuel Injectors: FITECH 55lb
• Spark Plugs: Autolite #104
• Spark Plug Wires: 8mm
• Balancer: Stock internally balanced

Recommended Components:
• Flexplate/Flywheel: Stock internally balanced
• Water Pump: Per application
• Fuel Pump: Not Provided – must run electric pump

Engine Info:
• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N
• Timing: Set to factory specifications via PCM module
• Spark Plug Gap: .040”
• Firing Order: 18726543
• Octane: 91+
• Stall Converter: 2200+
• Exhaust: 1 5/8+ 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.