HP & Torque: 350 HP / 400 FT. LBS

Cylinder Heads: Cast Iron Vortec

Compression Ratio: 9.5:1

Camshaft: Flat Tappet - .480 Intake / .489 Exhaust Lift and 226 Intake / 236 Exhaust Duration @ .050 - 112° LSA

Pistons: Hypereutectic

Crankshaft: Steel Crank - 3.480" Stroke and 5.700" Rods



DETAILED INFORMATION

Description: 

  • HP & Torque: 350 HP / 400 FT LBS
  • Compression Ratio: 9.5:1
  • Cast Iron Heads
  • Flat Tappet Cam
  • Cast Steel Crank
  • Hypereutectic Pistons

Block:

  • New BluePrint cast iron block
  • Square and parallel decked
  • 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" 
  • 1-Piece Rear Main Seal
  • Mech fuel pump provision: Yes
  • Passenger Side Dipstick Drilled and tapped for clutch linkage

Rotating Assembly:

  • Cast steel crankshaft
  • 3.480" Stroke
  • OEM type 5.700" connecting rods
  • Hypereutectic pistons
  • Internal Front/ External Rear

Cylinder Heads:

  • Vortec cast iron cylinder heads
  • 1.94 intake valves
  • 1.50 exhaust valves
  • Hardened push rods
  • Long slot rockers with positive lock adjusting nuts

Cam Specs:

  • Cam Type: Flat tappet
  • .480 Intake .489 Exhaust
  • 218 Intake / 224 Exhaust duration
  • @ .050 - 112-degree lobe separation

Also Includes:

  • Marine intake manifold
  • Valve covers
  • Marine Carburetor (Brand will vary due to supply)
  • Distributor
  • Oil pan

Notes:

  • Replaces Standard Rotation engines only. Not available as reverse rotation.
  • BluePrint Engines recommends the use of a flame arrestor in marine applications and advises checking local laws to ensure compliance with the United States Coast Guard Requirements for Ignition Protection & Fire Resistance.

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: MBP3550CTC

Fuel Delivery Type: Carbureted, 600 cfm, electric choke

Spark Plug: Champion 13

Spark Plug Gap: .045"

Harmonic Balancer: No

Flexplate/Flywheel: Yes

Stall Converter: N/A

Intake Manifold: Marine, cast iron

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

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