SKU: BP4003CT1
BluePrint Engines GM Small Block Compatible 400 c.i. Power Adder Engine - 511 Horsepower - Long Block
$9,399.00
400 c.i. 511 Horsepower Long Block

Horsepower & Torque: 511 Horsepower / 480 ft. lbs. Torque

Cylinder Heads: BluePrint Engines Aluminum Cylinder Heads

Compression Ratio: 9.5:1

Camshaft: Hydraulic Roller Cam - .555 Intake .577 Exhaust Lift and 236 Intake / 248 Exhaust Duration @ .050 - 113° LSA

Pistons: Forged

Crankshaft: Forged Steel Crank - 3.750" Stroke and Forged 6.000" Rods

Fuel Recommendation: 87+ Octane

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Financing available at checkout with Affirm

Overview:

BluePrint Engines’ GM Small Block Compatible 400 c.i. Power Adder Engine delivers a commanding 511 horsepower and is built to handle any type of forced induction with confidence. Whether you’re adding nitrous, a supercharger, or turbochargers, this long block provides the strength, precision, and reliability needed to manage serious boost while delivering consistent performance. Engineered with premium components and meticulous craftsmanship, the 400 c.i. Power Adder is the ultimate foundation for builders seeking high-horsepower, turn-key potential with uncompromising durability.

Description:

  • Horsepower & Torque: 511 Horsepower / 480 ft. lbs. Torque
  • Compression Ratio: 9.5:1
  • BluePrint Engines Aluminum Heads
  • BluePrint Engines Hydraulic Roller Cam
  • BluePrint Engines Forged Steel Crank
  • BluePrint Engines Forged Pistons

Block:

  • BluePrint Engines High Strength Cast Iron Block
  • Manufactured and Machined in the USA!
  • 4-Bolt Main
  • 4.125" Bore
  • 1-Piece Rear Main Seal
  • Mech Fuel Pump Provision: Yes
  • Passenger Side Dipstick
  • Drilled and Tapped for Clutch Linkage

Rotating Assembly:

  • New BluePrint Forged Steel Crankshaft
  • 3.750" Stroke
  • 6.000" Forged Connecting Rods
  • Forged Pistons
  • Internal Front/ External Rear Engine Balance
  • Dual Keyway Damper installed

Cylinder Heads:

  • BluePrint Aluminum Cylinder Heads - HP8103
  • 64cc Chamber
  • 2.08" Intake / 1.60" Exhaust Valves
  • 220cc Intake / 67cc Exhaust Runners

Cam Specs:

  • Hydraulic Roller
  • .555 Intake / .577 Exhaust Lift 
  • 236 Intake / 248 Exhaust Duration
  • @.050-113 Degree Lobe Separation
  • 1.6 Roller Rockers

Ignition Timing:

  • 10-16° Initial and Total Timing 32-34° at 3500 RPM

Also Includes:

  • BluePrint Valve Covers - BPP9518
  • BluePrint Dipstick - BPP9420
  • Timing Cover
  • Oil Pan

Notes:

  • NEW BluePrint block manufactured and machined in the USA!
  • Not for EGR.
  • This engine is designed to be capable of running power adders - turbo chargers, Nitrous oxide, superchargers, blowers etc. 
  • Built with a Dual Keyway crankshaft. Balancer included.
  • The performance aluminum cylinder heads on this engine feature a .500 raised port vs OEM.

WARNING: Cancer and Reproductive Harm
Bragging Rights Included.

EVERY BLUEPRINT ENGINE ACES THE DYNO TEST

We make sure we hit our target horsepower and proper torque with every crate engine. We use an advanced computerized balancer in our in-house dyno testing rooms 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.

All specs, zero speculation: A comprehensive, dyno-generated printout showing your critical engine specs will accompany your delivered engine — every time. 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 exact engine’s dyno results.

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