Name: GM LS Compatible 427 c.i. Pro Series Engine - 605 Horsepower - Long Block - No ECU / Harness
Brand: BluePrint Engines
SKU: PSLS42730CT
Price: 10299.0 USD
Availability: InStock

GM LS Compatible 427 c.i. Pro Series Engine - 605 Horsepower - Long Block - No ECU / Harness

Horsepower & Torque: 605 Horsepower / 565 FT. LBS. Torque

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

This engine Does NOT come with a Fuel Injection ECU and Wiring Harness.

Fuel Recommendation: 91+ Octane

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Overview:

The LS-compatible platform is the king of street machines—and this BluePrint Engines 427 C.I. Pro Series monster proves why. Unleash raw, LS-powered fury with a street-scorching 605 horsepower and 565 ft-lbs of torque. This beast has BluePrint aluminum heads, a hydraulic roller cam, and hypereutectic pistons, and modular iron crankshaft, all locked into a high-strength LSX-style cast iron block.

Description:

Horsepower & Torque: 605 Horsepower / 565 FT LBS
Compression Ratio: 11:1
BluePrint Engines LS3 Aluminum Heads
BluePrint Engines Hydraulic Roller Cam
BluePrint Engines Forged Pistons
BluePrint Engines Forged Crankshaft

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
4.0685" Bore
6-bolt Main

Rotating Assembly:

Forged Crankshaft
4.125" Stroke
Forged 6.125" Connecting Rods
Forged Pistons
Internally Balanced Front and Rear

Cylinder Heads:

BluePrint Aluminum Cylinder Heads -PS8015
69cc Chamber
2.165" Intake / 1.590" Exhaust Valves
259cc Intake / 102cc Exhaust Runners

Cam Specs:

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

Also Includes:

This engine does NOT come with a Fuel Injection ECU and Wiring Harness
Harmonic Balancer
Valve Covers
LS Swap Oil Pan
Timing Cover

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
Not for use in pollution-controlled vehicles or in dry sump applications.

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: PSLS42730CT

Fuel Delivery Type: Electronic Fuel Injected

Spark Plug: AC Delco 41-985

Spark Plug Gap: .040"

Harmonic Balancer: Non-Weighted

Flexplate/Flywheel: Non-Weighted

Stall Converter: 2200+

Intake Manifold: N/A

Fuel Recommendation: 91+ Octane Approved

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

Recommended Break In Oil: BPP710

Recommended Filter: BPPB160

Recommended Oil: BPP10W30

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.

At BluePrint Engines, customer satisfaction is our highest priority. Every engine is built using high-quality components, with each rotating assembly balanced to within two grams of specification. Before shipment, every crate engine is dyno tested and certified to ensure it is ready to deliver the horsepower and torque you expect.

To stand behind that level of quality, BluePrint Engines offers industry-leading warranty coverage, providing confidence and peace of mind whether the engine is installed by an individual or a professional installer. Our standard warranty is fully transferable, adding long-term value and reassurance for our customers.

Warranty Coverage Details:

BluePrint Engines (including Builder Series)- Standard Warranty 30 months or 50,000 miles (parts and labor)*
BluePrint Engines Extended Warranty- 48 months or unlimited miles (parts and labor)*
Race / Motorsports Engines -No warranty
Marine Engines- 12 months (parts and labor)
Short Blocks-12 months (parts only)
Bare Blocks- 6-Month Unaltered
International Sales- Warranty coverage is handled by the in-country distributor

*Applies to eligible engine part numbers beginning with “B” or “P.” Warranty coverage is subject to terms and conditions. Proper installation and maintenance are required.

Please refer to full warranty documentation for complete details 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 10w30 Engine Oil - 1 Quart