null
BluePrint Engines

BluePrint Engines Pro Series LS 427 C.I. 6-Bolt Short Block BPMS4271SBLS

Part Number:
BPMS4271SBLS
MPN:
BPMS4271SBLS
Availability:
Ships from Manufacturer
Shipping:
Free over $98 in U.S. 48
Type:
Short Blocks
Block:
High Strength Cast Iron (LSX Style)
Crankshaft:
8 Counterweight Forged
Crankshaft Reluctor:
58x
Crankshaft Stroke (in.):
4.125
Rod Length (in.):
6.125
Piston Material:
Forged
Compression Ratio:
9.5:1
Camshaft Included:
No
Electronics Included:
No
Quantity:
Sold Individually
Notes:
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.
$7,499.00

Description

BluePrint Engines Pro Series LS 427 C.I. Short Block 4.125 Stroke 6-Bolt BPMS4271SBLS

The new BPE LS Iron Block 427 Stroker Short Block is built as a strong foundation for high-horsepower power adder applications. Featuring a durable iron LS block and a fully forged rotating assembly, this short block is designed to handle supercharged, turbocharged, or nitrous combinations with confidence. It includes forged pistons with a 4.070 bore, forged H-beam rods, and an 8-weight forged crankshaft with a 58x reluctor ring, all internally balanced for smooth and reliable performance. Finished with a 6-bolt crank flange for added strength, this 427 LS short block is an excellent choice for serious street or race builds looking for durability and big power capability.

Description: 

  • Compression Ratio: 9.5:1 with 70cc Heads
  • 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 - Dish - 22cc
  • Internally Balanced Front and Rear

Engine Accessory Specs:

 

  • 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

Notes: 

 

  • BluePrint Motorsports engines are built for maximum performance and are intended for extreme duty applications. Because of the high-stress nature of their use, these engines are sold without any warranty, expressed, or implied.

 

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

Every BluePrint engine is Dyno tested and has strict parameters to pass and
be shipped to the customer. All parts are tested before being released for production:
• DC and Pneumatic assembly tools calibrated daily
• Fatigue Testing
• Durability Testing
• Random subassembly testing
• Quality system is ISO 9001: 2015 certified
• Traceable engine “DNA” electronic barcode record keeping of
manufacturing and performance data

View AllClose

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.
View AllClose

Related Products

Related Products