Item # 63247 BRAND: BluePrint Engines

BluePrint Engines GM 396 ci. 491 HP Stroker Dressed Long Block Crate Engine BP3961CT

396CI Stroker Crate Engine | Small Block GM Style | Longblock | Aluminum Heads | Roller Cam
396CI Stroker Crate Engine | Small Block GM Style | Longblock | Aluminum Heads | Roller Cam
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396CI Stroker Crate Engine | Small Block GM Style | Longblock | Aluminum Heads | Roller Cam

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BluePrint Engines GM 396 ci. 491 HP Stroker Dressed Long Block Crate Engine BP3961CT

Product Overview:

Description

  • HP and Torque: 491 HP / 509 FT LBS
  • Compression Ratio: 10.4:1
  • Aluminum Heads
  • Hydraulic Roller Cam
  • Forged Crank
  • Forged Pistons

Block:

  • NEW BluePrint Cast Iron Block
  • Manufactured and Machined in the USA!
  • Align honed main bearing bore
  • Cylinders honed on computer controlled machine to within .0002 straightness and roundness
  • Cylinders are sonic tested for thickness
  • 4-Bolt Main
  • 4.000" Bore
  • 1-Piece Rear Main Seal
  • Mech fuel pump provision: Yes
  • Passenger Side Dipstick
  • Drilled and tapped for clutch linkage

Rotating Assembly:

  • BluePrint Aluminum Cylinder Heads - HP8103
  • 64cc chamber
  • 2.08" intake/1.60" exhaust valves
  • 220cc intake/67cc exhaust runners

Cylinder Heads:

  • Cast Iron
  • Hardened retainers and springs
  • 1.94 swirl polished intake valves
  • 1.60 swirl polished exhaust valves

Cam Specs:

  • Cam Type: Roller
  • .544 Intake .555 Exhaust
  • 230 Intake / 236 Exhaust duration
  • @ .050, 110 degrees lobe separation angle

Ignition Timing

  • 34 degreess total at 3500 RPM

Notes

  • *A bronze distributor gear is NOT recommended on this engine
  • Not for use in pollution controlled vehicles
  • This engine features a true 4-inch bore, which mathematically yields 389 CID with a 3.875-inch stroke

Warranty

Click here for warranty information

Specifications

RECOMMENDATIONS

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: BP3961CT
  • Fuel Delivery Type: Carbureted, 850cfm ** Not included**
  • Spark Plug: BPP7938 NGK 7938 BKR5E
  • Spark Plug Gap: .035"
  • Harmonic Balancer: BPP350 - Non Weighted, 8" diameter
  • Flexplate/Flywheel: Late 350 Weighted
  • Stall Converter: 2000-2400 rpm
  • Intake Manifold: Dual plane, satin aluminum
  • Fuel Recommendation: 91 Octane
  • Timing (Initial/Total Advance): Initial timing - 10-16° and Total timing 32-34°
  • Firing Order: 1,8,4,3,6,5,7,2
  • Recommended Break in Oil: BPP710
  • Recommended Service Oil: BPP10W30
  • Recommended Oil Filter: BPP51061
  • Total Oil capacity with production oil pan, and Correct BPP51061 Filter: 5 Quarts

In the Box

Contents

  • Valve covers, oil pan and timing cover
  • Dyno test results shipped with engine

Guides & Accessories

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Questions & Answers

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BluePrint Engines GM 396 ci. 491 HP Stroker Dressed Long Block Crate Engine BP3961CT
$5,719.00
In Stock