BluePrint Engines BLS4273K4L7 LS 427 with 4L65/70E, EFI, Nat.

#227BLS4273K4L7

BluePrint Engines BLS4273K4L7 LS 427 with 4L65/70E, EFI, Nat.

BluePrint LS 427 delivers 605 horsepower and 565 ft.-lbs. of torque
Natural front accessory drive
Holley Terminator X Max EFI

Accessory Drive Finish:

Natural

Transmission Type:

4L65/70E

$27,099.00

/each

Factory Shipped

Quantity

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Product Summary

Connect and Cruise Crate Engine Type, Oil Pan Included

BluePrint LS 427 delivers 605 horsepower and 565 ft.-lbs. of torque
Natural front accessory drive
Holley Terminator X Max EFI
Forged crankshaft, forged pistons, aluminum heads, and hydraulic roller cam

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Key Specs

Crate Engine Type	Connect and Cruise
Compression Ratio	11.0:1
Engine Displacement	427 cu. in.
Camshaft Type	Hydraulic Roller Tappet
Cylinder Head Material	Aluminum

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BluePrint Engines BLS4273K4L7 Details

This BluePrint Builder Series LS 427 c.i. engine and 4L65/70E automatic transmission package is a high-output modern small block setup built for serious street performance with advanced EFI control and complete swap-ready convenience. Delivering 605 horsepower and 565 ft.-lbs. of torque, it combines forged internals, BluePrint aluminum heads, a hydraulic roller cam, and the Holley Terminator X Max EFI system with a natural front accessory drive and a complete 4L65/70E transmission package for a powerful, responsive combination designed for hard acceleration and overdrive cruising.

BluePrint LS 427 delivers 605 horsepower and 565 ft.-lbs. of torque
Natural front accessory drive
Holley Terminator X Max EFI
Forged crankshaft, forged pistons, aluminum heads, and hydraulic roller cam
Complete 4L65/70E automatic transmission package includes electronic controller, torque converter, flexplate, and starter for strong performance with overdrive cruising

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
4.0665" Bore
6-Bolt Main

Rotating Assembly:

Forged Crankshaft
4.125" stroke
Forged 6.125" Connecting Rods w/ 150,000 PSI Bolts
Forged Pistons
Internally Balanced Front and Rear

Cylinder Heads:

BluePrint Aluminum Cylinder Heads - PS8015
70cc Chamber
2.165" Intake - 1.600" Exhaust Valves
259cc Intake - 102cc Exhaust Runners

Cam Specs:

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

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:

LS Swap Oil Pan - Windage Tray - Pick Up Screen
BluePrint Engines Fuel Injectors and Rail
DBW Throttle Body - BPP12191019
Throttle Pedal, and Sensors
GM Plastic Intake Manifold
Spark Plugs & Wires
Harmonic Balancer
Coil Packs
Natural Front Accessory Drive:
LT1 Style 150-amp Alternator
LT1 Style Water Pump
Type II Power Steering Pump
Compact Style Air Conditioner Compressor

Assembled with Complete Performance Built 4l65/70e Four Speed Automatic Transmission Package:

4L65/70E Complete Package
(1996-2008 13-Pin Harness)
Electronic Transmission Controller Included
2200-2400 Stall Torque Converter
Flex Plate
Starter

First Gear Ratio: 3.059:1

Second Gear Ratio: 1.625:1

Third Gear Ratio: 1.000:1

Fourth Gear Ratio: 0.696:1

CARB Warning

Follow EPA, CARB, and state regulations for engine changes

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

BluePrint Engines BLS4273K4L7 Specifications

KEY SPECS
MFG. Part #	BLS4273K4L7
Brand	BluePrint Engines
Crate Engine Type	Connect and Cruise
Compression Ratio	11.0:1
Engine Displacement	427 cu. in.
Camshaft Type	Hydraulic Roller Tappet
Cylinder Head Material	Aluminum
Piston Material	Forged Aluminum
Crankshaft Material	Forged Steel
Carburetor Included	No
Intake Manifold Included	Yes
Distributor Included	No
Connecting Rod Material	Forged Steel
Valve Covers Included	Yes
Cylinder Heads Included	Yes
Throttle Body Included	Yes
Timing Cover Included	Yes
Oil Pan Included	Yes
Water Pump Included	Yes
Harmonic Balancer Included	Yes
Flexplate Included	No
Flywheel Included	Yes
Air Cleaner Included	No
Spark Plugs Included	Yes
Spark Plug Wires Included	Yes
Computer Included	Yes
Wiring Harness Included	Yes

GENERAL
Torque	565 ft./lbs.
Horsepower	605 horsepower
Combustion Chamber Volume	70cc
Camshaft Duration (.050 in)	239° intake / 255° exhaust
Camshaft Lift (in)	.624 intake / .624 exhaust
Sold in Quantity	Kit

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