BluePrint Engines 445 HP Long Block Power Adder GM 383 Small-Block Crate Engine

Whether you’re building a street-driven muscle car or restomod, BluePrint Engines has got you covered. This GM 383 small-block crate engine (BP38317CT1) brings strong, usable horsepower to the table. Suitable for weekend cruisers, it uses forged internals to stay tough. At the same time, the compression ratio stays street friendly. Plus, the dual keyway damper adds room to grow, making it a great base for future boost or nitrous.

Features and Benefits:
- High-strength, cast iron engine block with 4.000” bore
- Operates at 415 horsepower and 430 ft.-lbs. torque
- 8.9:1 compression ratio for balance of street drivability and boost-ready flexibility
- 4-bolt main offers stronger bottom end for high-HP applications
- 1-piece rear main seal ensures stronger, leak-free security
- Block is drilled and tapped for clutch linkage
- Built with a dual keyway damper and includes harmonic balancer
- Built-in BluePrint Engines performance cylinder heads made of aluminum
- New forged steel crankshaft with 3.750" stroke and 5.700" connecting rods
- Rods use I-beam design for strength, lighter weight, and reduced rotating mass
- Forged pistons for incredible strength and impact resistance
- Rotating assembly: internally balanced front, externally balanced rear
- Hydraulic roller cam. for lower maintenance and better strength than flat tappet cam.
- Ignition timing: 10-16° initial, 32-34° total
- Includes mechanical fuel pump provision and passenger-side dipstick
- Backed by BluePrint Engines' 30 month/50,000-mile warranty

Also Includes:
- Valve covers
- Oil pan
- Timing cover

Cylinder Head Specifications:
- 64cc chambers
- 2.02" intake / 1.60" exhaust valves
- 195cc intake / 75cc exhaust runners

Camshaft Specifications:
- .536” intake / .555” exhaust lift
- 224° intake / 236° exhaust duration
- @ .050-113° lobe separation

Additional Notes:
- Not designed for EGR use.
- This engine features a true 4” bore, which mathematically yields 377 CID with a 3.75” stroke.
- The cylinder heads feature a .500" raised port vs OEM casting. Please verify header-to-exhaust clearance prior to installation.