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BluePrint Engines

BluePrint Engines Pro Series Crate Engine GM LS 427 C.I. 610HP Power Adder Long Block BPMS4271LS

Part Number:
BPMS4271LS
MPN:
BPMS4271LS
Availability:
Ships from Manufacturer
Shipping:
Free over $98 in U.S. 48
Type:
Crate Engines
Block:
High Strength Cast Iron (LSX Style) Block
Cylinder Heads:
Aluminum
Crankshaft:
Forged Steel Crankshaft
Crankshaft Reluctor:
58x
Crankshaft Stroke (in.):
4.125
Rod Length (in.):
6.125
Piston Bore (in.):
4.0695
Piston Material:
Forged
Compression Ratio:
9.5:1
Camshaft Included:
Yes
Electronics Included:
No
Quantity:
Sold Individually
Notes:
This engine requires a non-weighted flex plate/flywheel.
  • BluePrint Engines Pro Series GM LS 427 C.I. 610HP Power Adder Long Block BPMS4271LS (BPMS4271LS)
  • BluePrint Engines Pro Series GM LS 427 C.I. 610HP Power Adder Long Block BPMS4271LS (BPMS4271LS)
  • BluePrint Engines Pro Series GM LS 427 C.I. 610HP Power Adder Long Block BPMS4271LS (BPMS4271LS)
  • BluePrint Engines Pro Series GM LS 427 C.I. 610HP Power Adder Long Block BPMS4271LS (BPMS4271LS)
$12,399.00

Description

BluePrint Engines Pro Series GM LS 427 C.I. 610HP Power Adder Long Block BPMS4271LS

**BluePrint Motorsports engines are built for maximum performance and are intended for extreme duty race applications. If this engine is used in a street application our normal 30 month, 50,000-mile warranty applies, if used in sanctioned racing no warranty, expressed, or implied.
Overview:
BluePrint Motorsports introduces the ultimate 427ci LS Chevy-compatible long block, purpose-built for maximum boosted horsepower. Whether you’re chasing wins on the drag strip, sliding through drift circuits, tackling off-road trails, or carving up autocross courses, this engine delivers the perfect blend of power and reliability. At its foundation is a high-strength LSX-style cast-iron block, designed to handle extreme boost from nitrous, superchargers, or turbos. Topping it off are BluePrint Engines LS3 aluminum heads, paired with a BluePrint hydraulic roller cam for optimized airflow and performance across the powerband. Inside, a forged 8cwt crankshaft and forged H-beam rods provide rock-solid strength, while Mahle 2618 custom forged pistons ensure unmatched durability under pressure.

Description: 

  • Horsepower & Torque: 610 Horsepower / 510 ft. lbs. Torque
  • Compression Ratio: 9.5:1
  • BluePrint Engines LS3 Aluminum Heads
  • BluePrint Engines Hydraulic Roller Cam
  • BluePrint Engines Forged Crankshaft
  • Mahle 2618 Custom Forged Pistons

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
  • 4.0695" Bore
  • 6-bolt studded mains
  • Billet Main Caps

Rotating Assembly:

  • Forged 8cwt Crankshaft
  • 4.125" Stroke
  • Forged H-Beam 6.125" Connecting Rods
  • Mahle Custom 2618 Forged Pistons
  • Internally Balanced Front and Rear

Cylinder Heads:

  • BluePrint Aluminum Cylinder Heads -PS8020
  • LSX Style 6 Bolt Studded Heads
  • 70cc Chamber
  • 2.165" Intake / 1.600" Exhaust Valves
  • 259cc Intake / 102cc Exhaust Runners

Cam Specs:

  • Hydraulic Roller
  • .641 intake / .641 Exhaust Lift
  • 236 Intake / 256 Exhaust Duration
  • @.050-115.5 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

Engine Accessory 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: BPMS4271LS
  • Fuel Delivery Type: NA
  • Spark Plug: CCH9405 (Not Included) Customer req to adjust heat range/gap per their fuel type and aspiration.
  • Spark Plug Gap: .045"
  • Harmonic Balancer: Non-Weighted
  • Flexplate/Flywheel: Non-Weighted
  • Stall Converter: Customer should match engine output and car setup to find best converter.
  • Intake Manifold: N/A
  • Fuel Recommendation: Requires Race Fuel of 100+ Octane
  • Firing Order: 1,8,7,2,6,5,4,3
  • Recommended Oil Filter: BPPB160
  • Recommended Oil: BPP20W50
 
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Warranty Information

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.
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