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Blueprint Engines PSLS4271CT

LS 427ci Base Upgrade FI Engine Upgrade for 1998-2010 Gen 3/Gen 4 Engines

Blueprint Engines PSLS4271CT

Part Number: 138-PSLS4271CT

LS 427ci Base Upgrade FI Engine
  • Upgrade for 1998-2010 Gen 3/Gen 4 Engines
  • 625 HP, 565 TQ
  • $8,999.00
    Ships 12/06/16
    if Ordered Today
    FREE Shipping
    Blueprint Engines PSLS4271CT LS 427ci Base Upgrade FI Engine Upgrade for 1998-2010 Gen 3/Gen 4 Engines $8,999.00

    Blueprint Engines PSLS4271CT Details

    Upgrade Engine

    Upgrade your 1998 through 2010 Gen 3 or 4 engine with this new 625 HP 427 cubic inch powerhouse specifically designed to replace an existing LS engine. Assembled with new GM block and heads, forged crank, rods, and pistons. The engine includes a performance hydraulic roller cam and lifters and upgraded roller rockers. Built with a Gen 4 style 58x reluctor and sensors, this engine is a drop in for Gen 4 applications, and by using Blueprint's conversion kit (sold separately), you can also install into earlier Gen 3 applications. Free "retune" of your ECM included (requires sending ECM to Blueprint). 91 octane or better recommended. Engine includes intake manifold, timing cover, valley cover, and rear cover. Injectors, rails, throttle body, coil packs, valve covers, water pump, and oil pan NOT included. In many cases, original parts can be used.

    Recommended Stall Converter: 2200+ RPM
    Recommended Fuel: 91 Octane

  • New GM block with 1-piece rear main seal
  • New GM LS3 Cylinder Heads with roller rocker arms
  • Recommended Spark Plugs: ACDelco 41-985
  • GM L92 Intake

    Rotating Assembly
  • Forged Crankshaft: 4.125" Stroke
  • Forged Connecting Rods: 6.125"
  • Mahle Forged Pistons
  • 11:1 Compression
  • Internally Balanced

    Camshaft Specs
  • Hydraulic Roller
  • Duration at .050'' Lift: 239 Intake, 255 Exhaust
  • Lift: .624'' Intake, .624'' Exhaust
  • Lobe Separation: 114°

  • Specifications:

    Flywheel Included
    Engine Balance
    Wiring Harness Included
    Air Cleaner Included
    Carburetor Included
    Computer Included
    Crate Engine Cylinder Head Material
    Cylinder Heads Included
    Distributor Included
    Engine Assembly Style
    Long block
    Flexplate Included
    Harmonic Balancer Included
    Intake Manifold Included
    Oil Pan Included
    Sold individually
    Spark Plug Wires Included
    Spark Plugs Included
    Throttle Body Included
    Timing Cover Included
    Valve Covers Included
    Water Pump Included
    Rear Main Seal Style
    Manufacturer's Part Number:

    Retrofit Engines
    Here's all you need to install a 427 cubic inch beast into your ride: new GM block; new GM LS3 cylinder heads; forged crank, pistons, and rods; performance hydraulic roller camshaft, lifters, and roller rockers; oil pan.

    Upgrade Engine
    Swap your 1998-2010 Gen 3 or 4 engine for a 625HP 427 cubic inch powerhouse! This engine is specifically designed to replace existing LS engines. Assembled with new GM block and new GM LS3 cylinder heads, plus forged crank, pistons, and rods. The engine also includes a performance hydraulic roller camshaft & lifters with upgraded roller rockers.

    Blueprint Pro Series Engines are dyno tested (dyno sheet included) and have a 30-Month/50,000-Mile Warranty. Your Blueprint Engine was tested with the components and specifications listed below. If you prefer to install different part(s), your engine may not produce the horsepower recorded on your dyno sheet.

  • Engine Part Number: PSLS4270CTC
  • Fuel Delivery: Carbureted, 850 cfm
  • Spark Plug: ACDelco 41-110
  • Spark Plug Gap: .040"
  • Harmonic Balancer: Non-Weighted
  • Flexplate/Flywheel: Non-Weighted
  • Stall Converter: 2200+
  • Intake Manifold: Single Plane, Satin Aluminum
  • Fuel Recommendation: 91-93 Octane
  • MSD 6012 Ignition System
  • Timing (Initial/Total Advance): Ignition Box Required
  • Firing Order: 1-8-7-2-6-5-4-3

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