BluePrint Engines BLS4279SCT4L8 LS 427/830HP with 4L80E, EFI

BluePrint Engines unleashes serious LS power with this 427 c.i. Builder Series package, delivering a massive 830 horsepower and paired perfectly with a tough, street-proven 4L80E automatic transmission. This combo is built for the enthusiast who wants modern reliability with race-ready punch, all controlled by the Holley Terminator X EFI system for crisp tuning, fast starts, and razor-sharp throttle response. Precision machining, premium internals, and BluePrint’s Pro-series build quality ensure the strength to handle every bit of boost, rpm, and abuse you throw at it. For builders chasing a turnkey LS powerhouse that’s ready to hit the streets, the strip, or anywhere in between, this 427/4L80E package is pure, modern muscle, delivered.

• LS 427 C.I Builder Series
• 4L80E
• Holley Terminator X EFI System
• 830HP
• BluePrint Engines

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:

• Low Profile Rear Sump Oil Pan - BPP81074
• All Sensors Required for Engine to Run
• DBW Throttle Body - BPP12191019
• 2.65 Liter Magnuson TVS 2650 Supercharger
• Spark Plugs & Wires
• Harmonic Balancer
• Timing Cover
• Valve Covers
• Coil Packs

Assembled with Complete HD 4l80e Transmission Package:

• 4L80E Complete Package
• Electronic Transmission Controller Included
• 3200+ Stall Torque Converter
• Flex Plate
• Starter
• 4L80E Gear Ratios:

1: 2.482

2: 1.482

3: 1.00

4: 0.750

R: 2.077