BluePrint BLS4279SCTKBT56 LS 427 Engine w/ T56 830HP

BluePrint Engines delivers a hard-hitting LS powerhouse with this 830-horsepower 427 Builder Series package, paired perfectly with the proven T56 manual for a turnkey, street-and-strip-ready drivetrain. Holley’s Terminator X EFI system keeps the power crisp and responsive, offering clean starts, smooth tuning, and rock-solid control at any rpm. Built with premium components, tight machining tolerances, and pro-series durability, this LS427 is engineered to take the abuse while delivering relentless modern muscle. The Black Pulley Kit adds a stealthy, performance-driven finish, making this 427/T56 combo as sharp under the hood as it is on the pavement.

Description:  

• Horsepower & Torque: 830 Horsepower / 800 ft. lbs. Torque
• Compression Ratio: 9.5:1
• BluePrint Engines Aluminum Heads
• BluePrint Engines Hydraulic Roller Cam
• BluePrint Engines Forged Crank
• BluePrint Engines Forged Pistons

Block:

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

Rotating Assembly:

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

Cylinder Heads:

• BluePrint Aluminum Cylinder Heads - PS8015
• 70cc 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
• Holley Terminator X Max Specific Features and Benefits:
• Real Time Fuel Map Learning Simplifies Tuning by Dynamically Adjusting the Base Fuel Rate
• On Board Bosch LSU 4.9 Wideband Control, Enabling Accurate AFR Readings and Closed Loop Tuning
• Eight High Impedance Injector Drivers, Ideal for Stock LS Injectors and Holley EFI Injectors
• Integrated 1-Bar MAP Sensor for Naturally Aspirated or Nitrous Setups, with Harness Support for External Higher Bar Sensors if needed
• 4 Configurable Inputs (12V, Ground, 5V, Frequency) and 2 Outputs (Ground, PWM) - Ideal for Electric Fans, Boost Control Solenoids, Nitrous Control and more
• Free PC Tuning Software via USB/CAN Interface for Full Laptop Control and Advance Setup
• Integrated 3.5" Touchscreen Handheld with Setup Wizard, Internal Data Logging, and Real Time Gauge Displays
• Terminator X Max ECU will Include a Base Timing Map Pre-Configured for this engine.

Also Includes:

• 2.65 Liter Magnuson TVS 2650 Supercharger
• Upgraded Motor tron S107 Injectors
• Electronic Fuel Injection
• Coil Packs
• Valve Covers
• Oil Pan
• Drive by Wire Throttle Body
• Timing Cover
• Spark Plugs and Wires
• Harmonic Balancer
• Black Front Accessory Drive
• LT1 Style 150-amp Alternator
• LT1 Style Water Pump
• Type II Power Steering Pump
• Compact Style A/C Compressor

Assembled with Complete T56 Six Speed Transmission Package:

      Includes the following: 

• McLeod Super Steel Pro Dual Disk Clutch
• Steel Bell Housing
• Billet Flywheel
• Engine Guard
• Starter

First Gear Ration: 2.66:1

Second Gear Ratio: 1.78:1

Third Gear Ration: 1.30:1

Fourth Gear Ration: 1.00:1

Fifth Gear Ration: 0.80:1

Sixth Gear Ration: 0.63:1

Notes:

• This Holley EFI Equipped engine has a fully calibrated ECU by BluePrint Engines. Please DO NOT follow the Holley EFI manual for the calibration of the ECU.
• 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 front accessory drive on this engine fits many vehicles, however it is the customer responsibility to accurately measure and confirm fitment.  Note this is a low-profile design, but things such as power steering hoses, alternator wiring, and additional fittings/fabrication may be required on some vehicles.
• BluePrint Engines Recommends Air Intake Kit BPPLS01013 to ensure correct MAF calculations and Dyno calibration are maintained with the provided ECU / tuning.
• Engine/Trans Package Ships assembled