ATK HIGH PERFORMANCE HP116C EFI LM7 5.3L 500HP

Base Engine:https://atkhp.com/product/atk-hp116-c...
Complete with FITECH EFI: https://atkhp.com/product/atk-hp116c-...

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 10295
• 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