GM LS Compatible 427 c.i. ProSeries Engine - 625 Horsepower - Base Dressed - Carbureted
GM LS Compatible 427 c.i. ProSeries Engine - 625 Horsepower - Base Dressed - Carbureted

GM LS Compatible 427 c.i. ProSeries Engine - 625 Horsepower - Base Dressed - Carbureted

SKU: PSLS4270CTC

GM LS Compatible 427 c.i. ProSeries Engine - 625 Horsepower - Base Dressed - Carbureted

SKU: PSLS4270CTC

HP & Torque: 625 HP / 575 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 $13,049.00
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Description:

  • HP & Torque: 625 HP / 550 FT LBS
  • Compression Ratio: 11:1
  • Aluminum Heads
  • Hydraulic Roller Cam
  • Forged Crank
  • Forged Pistons

Block:

  • 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

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
  • 247 intake 263 exhaust duration
  • @ .050, 114-degree lobe sep.

Ignition Timing:

  • Ignition box required

Also Includes:

  • Carburetor - 850cfm with mechanical secondaries, dual accelerator pumps and mechanical choke
  • Single plane aluminum intake
  • Harmonic balancer
  • Valve covers, retro fit oil pan and timing cover
  • Coil Packs and coil pack harness
  • Crank, cam and MAP sensors
  • Spark plug wires & wiring harness

Notes:

  • This engine requires a non-weighted flex plate/flywheel.
  • Recommended Fuel: 91 Octane
  • BluePrint Engines recommends a 2200+ RPM stall converter.
  • Retro fit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars
  • Does NOT include ignition box.  BluePrint Engines recommends MSD 6014 Ignition system on LS1HO setting

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: PSLS4270CTC

Fuel Delivery Type: Carbureted, 850cfm

Spark Plug: AC Delco 41-985

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

Timing (Initial/Total Advance): Ignition box required - BluePrint Engines recommends MSD 6014 Ignition system on LS1HO setting

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

Notes: Recommended break in oil for your BluePrint Crate Engine: BPP710, Not for EGR Also includes sensors and coil packs. If requested, BluePrint Engines can provide a base map and timing curve.

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.

BETTER THAN THE REST.

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.

IT ALL COMES DOWN TO RESULTS.

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.

BRAGGING RIGHTS INCLUDED!

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)!

RECOMMENDED PRODUCTS:
BluePrint Engines Crate Engine Break-In Oil — 1 Quart
$9.95
BluePrint Engines 10w30 Engine Oil - 1 Quart
$9.95
TrueBlue Performance Octane Boost
BluePrint Engines TrueBlue Performance Octane Booster
$29.95
BluePrint Engines TrueBlue UltraCool Antifreeze Coolant CONCENTRATE
$19.95
BluePrint Engines TrueBlue Power Steering Fluid
$8.95
BluePrint Engines TrueBlue Transmission Fluid UNIVERSAL ATF/MTF
$9.95
Gen IV LS and 2009+ Gen III Hemi Compatible Oil Filter
$12.95
Aluminum Water Pump – GM LS Corvette Spacing Compatible – Counter Clockwise - Natural
$149.95
GM LSX Compatible Starter – Delco Style - OEM Finish
$155.95
168-Tooth Steel Flex Plate - 1-Piece Rear Main Seal - OEM LS 1-Piece Balance - 4L60E/4L70E - GM LS Compatible
$159.95
168-Tooth Nodular Iron Flywheel - 6-Bolt Crank - 11" or 12" Clutch - GM LS Compatible
$299.95
BluePrint Parts – GM LS Compatible Water Neck – 45°
$34.95
BluePrint Parts – GM LS Compatible Water Neck – Straight
$34.95
GM LS Compatible Front Accessory Drive - Full Serpentine with Alternator | AC | Power Steering | Water Pump | Brackets and Bolts
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GM LS Compatible Front Accessory Drive - Full Serpentine with Alternator | Power Steering | Water Pump | Brackets and Bolts
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GM LS Compatible Front Accessory Drive - Full Serpentine with Alternator | AC | Water Pump | Brackets and Bolts
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