BluePrint Engines Crate Engine, For GM Chevrolet Small-Block, 396ci, 491 HP, Long Block, Each
Part Number:BPE-BP3961CT
HP & Torque: 491 HP / 509 FT. LBS
Cylinder Heads: BluePrint Engines Aluminum Cylinder Heads
Compression Ratio: 10.4:1
Camshaft: Hydraulic Roller Cam - .544 Intake / .555 Exhaust Lift and 230 Intake / 236 Exhaust Duration @ .050 - 110° LSA
Pistons: Forged
Crankshaft: Steel Crank - 3.875" Stroke and 6.000" Rods
DETAILED INFORMATION
Description:
- HP & 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:
- New BluePrint Forged Crankshaft
- 3.875 " Stroke
- Forged I-beam 6.000" connecting rods
- Forged Pistons
- Internal Front/ External Rear
Cylinder Heads:
- BluePrint Aluminum Cylinder Heads - HP8103
- 64cc chamber
- 2.08" intake/1.60" exhaust valves
- 220cc intake/67cc exhaust runners
Cam Specs:
- Cam Type: Roller
- .544 Intake .555 Exhaust
- 230 Intake / 236 Exhaust duration
- @ .050, 110 ° lobe separation angle
Ignition Timing:
- 34 degrees total at 3500 RPM
Also includes:
- Valve covers, oil pan and timing cover
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.
- 93 octane or higher is recommended for this engine.
- The performance aluminum cylinder heads on this engine feature a .500 raised port vs OEM.
Engine Accessory Specifications
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 (.750 inch reach, 14mm thread, 5/8 hex, plug)
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: 93 Octane or Higher
Timing (Initial/Total Advance): Initial timing - 10-16° and Total timing 32-34°
Firing Order: 1,8,4,3,6,5,7,2
Total Oil capacity with production oil pan, and Correct BPP51061 Filter : 5 Quarts
