Back to Results Home Engines & Components Engine Assemblies Engine and Transmission Combos BluePrint Engines BLS427K4L7 BluePrint Builder Series LS427/625HP Standard Edition EFI Crate Engine and 4L65/70E Trans Combos BLS427K4L7

Overview

BluePrint Builder Series LS427/625HP Standard Edition EFI Crate Engine and 4L65/70E Trans Combos

BluePrint Builder Series LS427/625HP Standard Edition EFI crate engine and 4L65/70E transmission combos take the guesswork out of matching up an engine and transmission for your ride. Featuring a fuel injected Chevy LS small block-compatible 427 (c.i.d.) engine that produces 625 horsepower, this standard edition builder series includes a polished pulley kit and 4L65/70E automatic transmission. The aluminum BluePrint Engines cylinder heads help produce a nice 11.0:1 compression ratio, with assistance from the hydraulic roller camshaft, forged pistons, and forged crankshaft. Altogether, this assembly produces 565 lbs.-ft. of torque. When you need or want a new LS powertrain for your ride, go with the authority in crate engines and their BluePrint Builder Series LS427/625HP Standard Edition EFI crate engine and 4L65/70E transmission combos.

Other product features, items, and specifications include:

Block:
* OEM style (4.060 in. bored to 4.069 in.)
* Main caps are 6-bolt
* One-piece rear main seal

Rotating Assembly:
* New forged crankshaft
* Stroke – 4.125 in.
* Forged connecting rods (6.125 in.)
* Forged pistons
* Internally balanced
* Non-weighted harmonic balancer

Cylinder Heads:
* BluePrint PS8015 models
* Chamber – 72cc
* Valves are 2.165 in. intake and 1.600 in. exhaust
* Exhaust runners are 259cc intake and 102cc exhaust

Camshaft:
* Hydraulic roller
* Intake valve lift – 0.624 in.
* Exhaust valve lift – 0.624 in.
* Intake duration at 0.050 in. of lift – 239
* Exhaust duration at 0.050 in. of lift – 255
* Lobe separation angle (LSA) – 114 degrees

Ignition Timing
* ECM supplied with calibration (initial and total timing are controlled by PCM)
* Firing order is 1-8-7-2-6-5-4-3

Assembled 4-speed Transmission Package:
* Complete 4L65/70E package with electronic transmission controller
* Torque converter with 2,200–2,400 rpm stall
* Non-weighted flexplate
* Starter

Other Components:
* All required (to make engine run) sensors and wiring harness (LS controller package only controls engine)
* Unlocked ECU for local Dyno shop tuning refinement
* LT4 87mm DBW (Drive-By-Wire) throttle body
* Valve covers, retro-fit oil pan (fits most 1955-95 GM front engine, RWD, V8 cars), and timing cover
* LS3 car intake manifold
* Fuel injectors (42 lbs.) and return-less fuel rail
* Coil packs
* Spark plug wires
* Gas/throttle pedal
* Complete front accessory drive includes A/C, power steering, alternator, belts, and pulleys
* ACDelco 41-985 spark plugs (0.040 in. gap)

Note: BluePrint highly recommends their BPPLS01013 air intake kit to ensure proper MAF calculations (same used on Dyno). Recommended fuel is 91-93 octane. Recommended oil is BPP710. Not designed for use with dry sump or pollution-controlled vehicles.

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