BluePrint Engines 355CI Marine Crate Engine | Small Block GM Style | Base Dressed Longblock with Carburetor | Iron Heads | Flat Tappet Cam
Part #: MBP3550CTC
Description:

- HP & Torque: 365 HP / 390 FT LBS
Compression Ratio: 9.5:1
Cast Iron Heads
Flat Tappet Cam
Cast Steel Crank
Hypereutectic Pistons
Block:
- Hand picked seasoned 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" Bored .040" over
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:
- GM Vortec cast iron cylinder heads
1.25 dia. valve springs, hardened retainers and keepers
2.02 swirl polished intake valves
1.60 swirl polished exhaust valves
Elgin 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
Dyno test results shipped with engine
Warranty:
- 12 month unlimited hour on pleasurecraft only. No warranty on commercial use.
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.
Part #: MBP3550CTC
Description:

- HP & Torque: 365 HP / 390 FT LBS
Compression Ratio: 9.5:1
Cast Iron Heads
Flat Tappet Cam
Cast Steel Crank
Hypereutectic Pistons
Block:
- Hand picked seasoned 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" Bored .040" over
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:
- GM Vortec cast iron cylinder heads
1.25 dia. valve springs, hardened retainers and keepers
2.02 swirl polished intake valves
1.60 swirl polished exhaust valves
Elgin 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
Dyno test results shipped with engine
Warranty:
- 12 month unlimited hour on pleasurecraft only. No warranty on commercial use.
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.
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
Notes: Recommended break in oil for your BluePrint Crate Engine: BPP710, Not for EGR
Header Partners: HUSLER 770-664-8880 Sanderson 650-583-4590 Lemons 805-239-8998
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Click here to download a copy of the Installation Guide that came with your BluePrint engine.