BluePrint MBP3550CT GM 355 Base Marine Engine, Cast Iron Vortec Heads

BluePrint MBP3550CT GM 355 Base Marine Engine, Cast Iron Vortec Heads

BluePrint MBP3550CT GM 355 Base Marine Engine, Cast Iron Vortec Heads is a engine assembly listing intended for buyers seeking a specific replacement, restoration, or performance application. Review the model and configuration details carefully before ordering to ensure the correct match for your vehicle or build.

Product Highlights

• True Blue Power! BluePrints pro engine builders are enthusiasts just like you and it shows in the quality and performance of every engine they build. Each BluePrint crate engine is carefully dyno tested and ships with printed, proven results. If you’re looking serious horsepower at an affordable price, BluePrint Engines is the choice for you! GM 355 Base Marine Engine – Cast Iron Vortec Heads – Flat Tappet Cam Overview HP & Torque: 365 HP / 390 FT LBS Compression Ratio: 9.5:1 Cast Iron Heads Hypereutectic Pistons Flat Tappet Cam Cast Steel Crank Part #: MBP3550CT Block Seasoned 4 bolt main block One piece rear main seal Max bore .040 Align honed main bearing bore Sonic tested to assure wall thickness Rotating Assembly New cast steel crankshaft-externally balanced Chevy heavy beam rods resized and clearance improved 150,000 PSI rod bolts Keith Black Hypereutectic pistons Hastings moly rings New Hydraulic flat tappet camshaft Heavy duty double roller timing 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 226 Intake / 236 Exhaust duration @ .050 – 112 degree lobe separation Ignition Timing 34 degrees at 3500 rpm Also Includes New cast iron marine intake Polished aluminum valve covers Rubber coated steel oil pan Brass freeze plugs All engines are dyno tested on a state of the art DTS dyno and ship with a complete spec sheet Warranty 12 month unlimited hour on pleasurecraft only. No warranty on commercial use. SpecificationsCrate Engine Type: Long BlockEngine Displacement: 355 cu. in.Horsepower: 365 horsepowerCompression Ratio: 9.5:1Torque: 390 ft./lbs.Camshaft Type: Hydraulic Flat TappetCylinder Head Material: AluminumPiston Material: Hypereutectic AluminumCrankshaft Material: Cast SteelCamshaft Duration (.050 in): 226° intake / 236° exhaustCamshaft Lift (in): .480 intake / .489 exhaustBore x Stroke (in): 4.000" bored .040 over x 3.480"Carburetor Included: NoIntake Manifold Included: NoDistributor Included: NoWarranty: 12 month parts and labor, pleasurecraft onlyValve Covers Included: YesAssembled: YesEngine Balance: ExternalCylinder Heads Included: YesRear Main Seal Style: 1-pieceThrottle Body Included: NoOil Pan Included: YesTiming Cover Included: YesWater Pump Included: NoHarmonic Balancer Included: NoFlexplate Included: NoFlywheel Included: NoAir Cleaner Included: NoSpark Plugs Included: NoSpark Plug Wires Included: NoComputer Included: NoWiring Harness Included: NoCamshaft Included: YesCylinder Heads: Cast iron VortecBlock: 4 bolt mainMFG. Part #: MBP3550CTNotes: Zinc Additive Required For Flat Tappet Application, Recommended Oil For Your BluePrint Crate Engine: 10W30, Non-Synthetic. Not For EGRBrand: BluePrint Engines

Technical Specifications

Compatibility & Fitment

Engine compatibility depends on vehicle year, engine family, mounts, accessories, sensors, fuel delivery and emissions equipment. Verify the exact assembly configuration and required supporting parts before purchase.

What’s Included

Package contents depend on the exact manufacturer part number and whether the listing is a complete assembly, long block, short block, bare block, or transmission package. Only components explicitly stated in the product specifications or confirmed by the seller should be considered included.

Installation & Care

Follow the manufacturer’s installation, fluid, break-in, and maintenance instructions. Inspect all mating components and connections before first operation. Use the fluids and consumables specified for the exact application.

Warranty Information

Warranty coverage, duration, exclusions and any core-return requirements must be confirmed for this exact product before purchase. A 3-year store warranty should be advertised only if it is actually offered for this SKU under published store terms; manufacturer warranty may differ.

Important Product Information

Photos may show optional or illustrative components. Fitment, stock status, shipping requirements and installation accessories should be confirmed before ordering. Professional installation is recommended where applicable.