GM LS Compatible 427 c.i. ProSeries Engine - 800 HP - Base Dressed - Supercharged
GM LS Compatible 427 c.i. ProSeries Engine - 800 HP - Base Dressed - Supercharged
GM LS Compatible 427 c.i. ProSeries Engine - 800 HP - Base Dressed - Supercharged
GM LS Compatible 427 c.i. ProSeries Engine - 800 HP - Base Dressed - Supercharged

GM LS Compatible 427 c.i. ProSeries Engine - 800 HP - Base Dressed - Supercharged


GM LS Compatible 427 c.i. ProSeries Engine - 800 HP - Base Dressed - Supercharged


HP & Torque: 800 HP / 780 FT. LBS

Cylinder Heads: BluePrint Engines LS3 Aluminum Cylinder Heads

Compression Ratio: 11:1

Camshaft: Hydraulic Roller Cam - .624 Intake / .624 Exhaust Lift and 239 Intake / 255 Exhaust Duration @ .050 - 114° LSA - Three Bolt Cam

Pistons: Forged

Crankshaft: Steel Crank - 4.125" Stroke and 6.125" Rods

Regular price $22,949.00
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  • Financing available at checkout with Affirm


  • HP & Torque: 800 HP / 780 FT LBS
  • Compression Ratio: 11:1
  • Aluminum Heads
  • Hydraulic Roller Cam
  • Forged Crank
  • Forged Pistons


  • OEM Block Machined in the USA!
  • 6-Bolt Main
  • 4.060" Bored to 4.069
  • 1-Piece Rear Main Seal

Rotating Assembly:

  • New Forged Crankshaft
  • 4.125" stroke
  • Forged 6.125" connecting Rods
  • Forged Pistons
  • Internal Balance

Cylinder Heads:

  • BluePrint Aluminum Cylinder Heads -PS8015
  • 72cc chamber
  • 2.165" intake/1.600" exhaust valves
  • 259cc intake/102cc exhaust runners

Cam Specs:

  • Roller
  • .624 intake .624 exhaust lift
  • 239 Intake / 255 Exhaust duration
  • @ .050, 114-degree lobe sep.

Ignition Timing:

  • ECM supplied with calibration
  • Not capable of transmission control
  • Transmission controller required

Also Includes:

  • 2.3L Magnuson TVS Super Charger
  • Upgraded Mototron S107 Injectors
  • Electronic Fuel Injection
  • Coil Packs
  • Valve covers
  • Oil pan
  • Water Pump
  • Belt tensioner
  • arm
  • All sensors required for engine to run
  • Wiring harness
  • Gas pedal
  • Drive by wire throttle body
  • Timing cover
  • Spark plugs
  • Spark plug wires
  • Harmonic balancer


  • Not for use in pollution-controlled vehicles.
  • The Included LS controller package is for engine control only. Does not contain any transmission or body control. The ECU comes with calibration that is optimal for our engine, however, please note that vehicle parameters such as gearing, tire size, vehicle weight, air intake, headers, etc. may necessitate additional tuning once installed into your specific vehicle. The included ECU is unlocked for further refinement at your local dyno shop if required.
  • BluePrint Engines Recommends Air Intake Kit BPPLS01013 to ensure correct MAF calculations and Dyno calibration are maintained with the provided ECU / tuning.

Your BluePrint engine was dyno tested with the parts and specifications listed below.  If you prefer to install a different part, your engine may not produce the horsepower recorded on your dyno sheet.

Part Number: PSLS4272SCT

Fuel Delivery Type: Electronic Fuel Injected

Spark Plug: NGK 3689 (TR6IX) 

Spark Plug Gap: .030"

Harmonic Balancer: Non-Weighted

Flexplate/Flywheel: Non-Weighted

Stall Converter: 3200+

Intake Manifold: LS3

Fuel Recommendation: 91-93 Octane

Timing (Initial/Total Advance): Ignition timing and spark advance are controlled by Powertrain Control Module

Firing Order: 1,8,7,2,6,5,4,3

Notes: Recommended break in oil for your BluePrint Crate Engine: BPP710, Not for EGR. 10-11 psi of boost

Header Partners: 
Click here for our Header Partners and recommendations.

Click here to download a copy of the Installation Guide that came with your BluePrint engine.


The satisfaction of our customers is our highest priority at BluePrint Engines. We use quality components to balance your engine's rotating assembly within two grams of spec. We dyno test your crate engine and certify that it's ready to deliver horsepower and torque.

We give your BluePrint engine the industry's best-in-class warranty for 30-months / 50,000 miles — with the extra confidence only BluePrint can provide. Our warranty applies to individual or professional installations and is fully transferable.

For a detailed overview of our warranty, click here.


We make sure we hit our target horsepower and proper torque with every crate engine. We use an advanced computerized balancer to get our rotating assemblies within two grams, ensuring silky smooth power over the entire RPM range. That's precisely why our engines sound and run better than our competitors.


A comprehensive, dyno-generated printout showing these critical specs will accompany your delivered engine. No more guessing or wondering what your installed engine's real-world peak horsepower and torque ratings actually are. Any doubters in the crowd? Simply flash 'em your dyno results!

This engine will be dyno tested before it ships to you at no additional charge (others charge $500)!

BluePrint Engines Crate Engine Break-In Oil — 1 Quart
BluePrint Engines 10w30 Engine Oil - 1 Quart
TrueBlue Performance Octane Boost
BluePrint Engines TrueBlue Performance Octane Booster
GM Gen IV LS Compatible Oil Filter
Holley EFI In-Tank Retrofit Fuel Pump - 450 LPH - Return Style
EFI Billet Aluminum Fuel Pressure Bypass Regulator - 40-75 PSI and -10AN ORB - Black
Liquid Filled Fuel Pressure Gauge - 0-100 PSI
LS Air Intake Kit
GM LSX Compatible Starter – Delco Style - OEM Finish
168-Tooth Steel Flex Plate - 1-Piece Rear Main Seal - OEM LS 1-Piece Balance - 4L60E/4L70E - GM LS Compatible
168-Tooth Nodular Iron Flywheel - 6-Bolt Crank - 11" or 12" Clutch - GM LS Compatible
BluePrint Parts – GM LS Compatible Water Neck – 45°
BluePrint Parts – GM LS Compatible Water Neck – Straight