BluePrint BPC4085CTCK Mopar 408 465 HP Dressed Carbureted Crate Engine

Description

Propel vintage Dodge Chargers with the BluePrint BPC4085CTCK Crate Engine. Based on the classic Chrysler 360 small block platform, this 408 cubic inch stroker outputs 465 horsepower at 5500 RPM and 498 lb-ft torque at 4200 RPM. Complete front serpentine accessories, four barrel carburetion, and matched electronic ignition create an all inclusive turnkey package for classic Mopar restomods.

Solid cast iron block casting features heavy cylinder walls anchored by two bolt high strength main caps. The reciprocating kit combines a cast steel 4.000 inch stroke crankshaft, forged 6.123 inch connecting rods, and hypereutectic pistons inside 4.030 inch bores. The resulting 10.0:1 compression ratio operates on 91 octane pump gasoline. Total wet sump capacity holds five quarts, bringing assembled dry weight to 515 lbs.

Key Features of BluePrint BPC4085CTCK

Buy BluePrint BPC4085CTCK crate engine packages to drop turnkey Mopar small block power into Dodge Darts, Challengers, and Plymouth Barracudas. The front dress integration includes alternator, power steering, and water pump to eliminate external bracket hunting.

• Complete front serpentine pulley package runs alternator, power steering pump, and water pump.
• 750 CFM four barrel electric choke carburetor meters air and fuel for sharp throttle transitions.
• High flow aluminum cylinder heads drop dead chassis weight while resisting high temperature detonation.
• Stroker 4.000 inch crankshaft generates 498 lb-ft torque to launch heavy vehicle chassis hard off the line.
• BluePrint BPC4085CTCK ignition equipment features an electronic distributor providing consistent spark energy up to 6000 RPM.
• Dual plane aluminum intake manifold sustains broad mid range torque from 2000 through 5800 RPM.
• Full roller rocker arms maintain exact valvetrain alignment without guide friction.

Chrysler Stroker Valvetrain Dyno Metrics

Testing on water brake engine dynamometers validates 465 brake horsepower at 5500 RPM and 498 lb-ft torque at 4200 RPM across a wide 2000 to 5800 RPM band. Camshaft events measure 230 degrees intake and 236 degrees exhaust duration at 0.050 inch lift, producing 0.544 inch intake and 0.555 inch exhaust lift. The engine draws 13 in-Hg vacuum at 850 RPM on 91 octane fuel, holding 50 to 65 PSI hot oil pressure.

Mopar K Member Drivetrain Integration

Casting specifications fit vintage Dodge and Plymouth passenger car K-members without frame alterations. The crankshaft requires an external balance torque converter or flywheel matched to Chrysler A727 automatic or A833 four speed transmissions. Low profile cylinder heads clear master cylinders, while the front sump oil pan drops over intermediate steering linkage components.

Mopar Valve Train Service Rules

Pre prime the engine oiling channels with high zinc break in oil using an oil pump drive tool prior to startup. This stroker engine is not engineered for marine bilge setups, forced induction boost exceeding six PSI on stock ring end gaps, or unmetered nitrous oxide systems.

• Drain break in oil and replace the spin on lube filter after the first 500 operating miles.
• Perform regular motor oil changes every 3000 miles or six months with high zinc synthetic oil.
• Inspect serpentine drive belt alignment and verify ignition timing advance every 6000 street miles.

Factory Limited Warranty Shipped Manifest

Protection includes a 30-Month / 50,000-Mile factory limited warranty guarding against defective components. The shipment crate contains the fully dressed engine, serpentine accessory system, alternator, steering pump, water pump, carburetor, distributor, spark wires, oil pan, and certified dynamometer run sheet.