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

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.

Specifications

• Crate Engine Type: Long Block
• Engine Displacement: 355 cu. in.
• Horsepower: 365 horsepower
• Compression Ratio: 9.5:1
• Torque: 390 ft./lbs.
• Camshaft Type: Hydraulic Flat Tappet
• Cylinder Head Material: Aluminum
• Piston Material: Hypereutectic Aluminum
• Crankshaft Material: Cast Steel
• Camshaft Duration (.050 in): 226° intake / 236° exhaust
• Camshaft Lift (in): .480 intake / .489 exhaust
• Bore x Stroke (in): 4.000" bored .040 over x 3.480"
• Carburetor Included: No
• Intake Manifold Included: No
• Distributor Included: No
• Warranty: 12 month parts and labor, pleasurecraft only
• Valve Covers Included: Yes
• Assembled: Yes
• Engine Balance: External
• Cylinder Heads Included: Yes
• Rear Main Seal Style: 1-piece
• Throttle Body Included: No
• Oil Pan Included: Yes
• Timing Cover Included: Yes
• Water Pump Included: No
• Harmonic Balancer Included: No
• Flexplate Included: No
• Flywheel Included: No
• Air Cleaner Included: No
• Spark Plugs Included: No
• Spark Plug Wires Included: No
• Computer Included: No
• Wiring Harness Included: No
• Camshaft Included: Yes
• Cylinder Heads: Cast iron Vortec
• Block: 4 bolt main
• MFG. Part #: MBP3550CT
• Notes: Zinc Additive Required For Flat Tappet Application, Recommended Oil For Your BluePrint Crate Engine: 10W30, Non-Synthetic. Not For EGR
• Brand: BluePrint Engines