SKU: BP38318CT1
BluePrint Engines GM Small Block Compatible 383 C.I. Long Block
$5,999.00
383 c.i. 436 Horsepower Long Block

Horsepower & Torque: 436 Horsepower / 443 ft. lbs. Torque

Cylinder Heads: BluePrint Engines Aluminum Cylinder Heads

Compression Ratio: 10:1

Camshaft: Hydraulic Roller Cam - .544 Intake / .555 Exhaust Lift and 230 Intake / 236 Exhaust Duration @ .050 - 110° LSA

Pistons: Hypereutectic

Crankshaft: Cast Crank - 3.750" Stroke and 5.700" Rods

Fuel Recommendation: 91+ Octane

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Financing available at checkout with Affirm

Overview:

The GM Small Block compatible crate engine brings together a 4.000" bore and 3.750" stroke performance platform, built for builders who want flexibility and power potential. Completely customizable, this engine allows horsepower and torque outputs to vary based on the fuel system you choose, giving you full control over how mild or wild your final setup becomes. Outfitted with a timing cover, dipstick, oil pan, and valve covers, it arrives as a ready-to-build foundation engineered with precision machining and quality components, perfect for crafting a tailored street or strip combination.

Description:

  • Horsepower & Torque: 436 Horsepower / 443 ft. lbs. Torque
  • Compression Ratio: 10.0:1
  • BluePrint Engines Aluminum Heads
  • BluePrint Engines Hydraulic Roller Cam
  • BluePrint Engines Hypereutectic Pistons
  • BluePrint Engines Cast Crankshaft

Block:

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

Rotating Assembly:

  • Cast Crankshaft
  • 3.750" Stroke
  • OEM Type 5.700" Connecting Rods w/ 150,000 PSI Bolts
  • Hypereutectic Pistons
  • Externally Balanced Front and Rear

Cylinder Heads:

  • BluePrint Aluminum Cylinder Heads - H8002K
  • 64cc Chamber
  • 2.02" Intake / 1.60" Exhaust Valves
  • 195cc Intake / 75cc Exhaust Runners

Cam Specs:

  • Hydraulic Roller Cam
  • .544 Intake / .555 Exhaust Lift
  • 230 Intake / 236 Exhaust Duration
  • @ .050-110 Degree Lobe Separation Angle

Ignition Timing:

  • Initial Timing 10-16 ° and Total timing 32-34°

Also Includes:

  • BluePrint Logo'd Valve Covers - BPP9518
  • BluePrint Dipstick - BPP9420
  • High Volume Oil Pump 
  • Timing Cover
  • Oil Pan

Notes:

  • This engine features a true 4-inch bore, which mathematically yields 377 CID with a 3.75-inch stroke.
  • Not for EGR.
  • 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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