Overview:

The BluePrint every popular GM LS-Compatible 427 c.i. performance crate engine delivers a dyno-tested 585 horsepower and 520 ft. lbs. of torque, right out of the box. This engine comes equipped with BluePrint’s fully calibrated multi-port fuel injection system—engineered for precision and reliability. The included ECU and complete wiring harness make installation straightforward and stress-free and has been rigorously tested over the course of a year in both on-road and off-road environments, under a wide range of temperatures and conditions. The result? A finely tuned, fully optimized calibration that maximizes the power and drivability of this 427 c.i. powerhouse—far surpassing the performance of typical self-learn EFI systems. The BluePrint ECU manages both ignition timing and fuel delivery and supports seamless self-learn functionality as you add bolt-on upgrades like headers, camshafts, or performance exhaust systems. With just three simple connections—Main Battery, switched 12V Ignition, and Fuel Pump—you’ll be up and running in no time.

Description: 

• Horsepower & Torque: 585 Horsepower / 520 ft. lbs. Torque
• Compression Ratio: 11:1
• BluePrint Engines LS3 Aluminum Heads
• BluePrint Engines Hydraulic Roller Cam
  
• BluePrint Engines Forged Crank
• BluePrint Engines Forged Pistons
  

Block:

• BluePrint Engines High Strength Cast Iron (LSX Style) Block
• Increased Deck Thickness and Strength Webbing
• Utilizes OEM LS3 Front and Rear Covers
• Improved Water Jacket Design
• Extended Cylinder Skirt
• 1-Piece Rear Main Seal
• Priority Main Oiling
• 4.0695" Bore
  
• 6-Bolt Main

Rotating Assembly:

• New Forged Crankshaft
• 4.125" Stroke
• Forged 6.125" Connecting Rods
• Forged Pistons
• Internally Balanced Front and Rear
  

Cylinder Heads:

• BluePrint Aluminum Cylinder Heads - PS8015
• 69cc chamber
• 2.165" Intake / 1.590" Exhaust Valves
• 259cc Intake / 102cc Exhaust Runners

Cam Specs:

• Hydraulic Roller
• .624 Intake / .624 Exhaust Lift
• 239 Intake / 255 Exhaust Duration
• @.050-114 Degree Lobe Separation
  

Ignition Timing:

• ECM Supplied with Calibration
• Not Capable of Transmission Control
• Transmission Controller Required
  

Also Includes:

• Drive by Wire Throttle Body - BPP12191019
  
• LS3 Cast Aluminum Intake Manifold
  
• LS Swap Oil Pan - BPP81074
  
• Water Pump - BPPLS126WP
• Engine Harness and ECU Kit
  
• Injectors and Fuel Rail Kit
  
• Spark Plugs & Wiring
  
• Harmonic Balancer 
  
• Timing Cover
• Valve Covers
  
• Coil Packs
• Gas Pedal
  

Notes:

• This engine requires a non-weighted flex plate/flywheel.
• Recommended Fuel: 91 Octane
• BluePrint Engines recommends a 2200+ RPM stall converter.
• Retro fit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars
• Not for use in pollution-controlled vehicles or in dry sump applications.
• The Included LS controller package is for engine control only. Does not contain any transmission or body control. The ECU comes with calibration that is optimal for our engine, however, please note that vehicle parameters such as gearing, tire size, vehicle weight, air intake, headers, etc. may necessitate additional tuning once installed into your specific vehicle. The included ECU is unlocked for further refinement at your local dyno shop if required.
• BluePrint Engines Recommends Air Intake Kit BPPLS01013 to ensure correct MAF calculations and Dyno calibration are maintained with the provided ECU / tuning.