BluePrint Engines 427 c.i. GM LS Style ProSeries Deluxe Dressed Engine with GM Controller Black Pull
Manufacturer Warranty Included
100% Satisfaction Guarantee Since 1978
We stand behind our solutions and customers.
- • 90 Day Returns
- • Lifetime Tech Support

Product Overview:
Description
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
- Horsepower & Torque: 605 Horsepower / 565 FT LBS
- Compression Ratio: 11:1
- Aluminum Heads
- Hydraulic Roller Cam
- Forged Crank
- Forged Pistons
Block:
- BluePrint Engines High Strength Cast Iron 6.2L Block
- Increased Deck Thickness and Strength Webbing
- Extended Cylinder Skirt
- Priority Main Oiling
- 4.0685" Bore
- 6-Bolt Main
- 1-Piece Rear Main Seal
- Improved Water Jacket Design
- Utilizes OEM LS3 Front and Rear Covers.
Rotating Assembly:
- New 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
Ignition Timing:
- ECM Supplied with Calibration
- Not Capable of Transmission Control
- Transmission Controller Required
Also Includes:
- Drive by Wire Throttle Body
- GM Plastic Intake Manifold
- 42# Injectors and Returnless Fuel Rail
- Harmonic Balancer
- Valve Covers
- LS swap Oil Pan
- Timing Cover
- Coil Packs
- Spark Plug and Wires
- Wiring Harness
- GM Controller
- Gas Pedal
- Front Accessory Drive with Water Pump, A/C Compressor, Alternator, and Power Steering Pump
Notes:
- This engine requires a non-weighted flex plate/flywheel.
- Recommended Fuel: 91 Octane
- The front accessory drive on this engine fits many vehicles, however it is the customer responsibility to accurately measure and confirm fitment. Note this is a low-profile design, but things such as power steering hoses, alternator wiring, and additional fittings/fabrication may be required on some vehicles.
- 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.
- 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 In
Specifications
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: PSLS4273CTFKB
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: GM Plastic Intake
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.Universal fit oil pan. Also includes sensors, coil packs and wiring harness, and a new ECM with our custom tune installed, drive by wire throttle body and matching throttle pedal.
In the Box
Guides & Accessories
Instructions
Reviews
Questions & Answers
