--- title: BPC4085CT Series description: Chrysler Small Block Compatible 408 c.i. Engine - 465 Horsepower --- [Skip to content](https://knowledgebase.blueprintengines.com/knowledge/bpc4085ct-series#main-content) English Show submenu for translations ![IN CRATE ENGINES..png\]](https://knowledgebase.blueprintengines.com/hs-fs/hubfs/IN%20CRATE%20ENGINES..png?height=40&name=IN%20CRATE%20ENGINES..png) Open main navigation Close main navigation - English Show submenu for translations - Go to www.blueprintengines.com Go to www.blueprintengines.com How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://knowledgebase.blueprintengines.com/knowledge?hsLang=en) 2. [Engine Specs](https://knowledgebase.blueprintengines.com/knowledge/engine-specs?hsLang=en) # BPC4085CT Series ## Horsepower & Torque: 465 Horsepower / 494 FT. LBS. Torque          Cylinder Heads: BluePrint Engines Assembled, Edelbrock Aluminum Cylinder Heads                                                                                Compression Ratio: 10:1                                                                      Camshaft: Hydraulic Roller - .544 Intake / .541 Exhaust Lift and 236 Intake / 242 Exhaust Duration @ .050 - 110° LSA                                                    Pistons: Forged                                                                                          Crankshaft: Cast Crank - 4.000" Stroke and Forged 6.123" Rods              Fuel Recommendation: 91+ Octane #### Description: - Horsepower & Torque: 465 Horsepower / 494 FT. LBS. Torque - Compression Ratio: 10:1 - Aluminum Heads - Roller Cam - Cast Crankshaft - Forged Pistons #### Block: - Hand-Picked Seasoned Magnum 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 - 2-Bolt Main - 4.040" Bore - 2-Piece Rear Main Seal - Mech Fuel Pump Provision: Yes #### Rotating Assembly: - Cast Crankshaft - 4.000" Stroke - Forged Magnum 6.123" Connecting Rods w/ 150,000 PSI Bolts - Forged Pistons - Externally Balanced Front and Rear #### Cylinder Heads: - BluePrint Engines Assembled and Machined Edelbrock 61769 Casting - Aluminum Magnum Pattern Cylinder Heads - 58cc Chamber - Aluminum Roller Rockers - 2.02" Intake / 1.60" Exhaust Valves - 176cc Intake / 75cc Exhaust Runner **Cam Specs:** - Cam Type: Roller - .544 Intake / .541 Exhaust Lift - 236 Intake / 242 Exhaust Duration - @.050-110 Degree Lobe Separation #### Ignition Timing: - 34 Degrees Total at 4000 RPM #### Also Includes: - Valve Covers - Oil Pan - Timing Cover #### Notes: - Not for use in pollution-controlled vehicles. - Required Magnum Pattern intake manifold. Tested with [BPP7577](https://blueprintengines.com/products/edelbrock-performer-rpm-air-gap-small-block-mopar-intake-manifold-magnum-heads-dual-plane-bpp7577) - If installing with a Manual Transmission with .750" input shaft, Recommended Pilot bearing is PN FC-69907. - Recommended Pilot OD is 1.81"   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:** BPC4085CT **Fuel Delivery Type:** Carbureted, 750cfm, manual choke **Spark Plug:** [BPP7938 NGK 7938 BKR5E](https://blueprintengines.com/products/bpp7938-ngk-7938-bkr5e-spark-plugs-set-of-8)(.750 inch reach, 14mm thread, 5/8 hex, plug) **Spark Plug Gap:** .035" **Harmonic Balancer:** Magnum Weighted balancer such as [BPP360](https://blueprintengines.com/products/mopar-small-block-harmonic-balancer-273-318-340-360-408-blueprint-chrysler-stroker). EXTERNALLY BALANCED '1993-'1997, 7.25" Diameter. **Flexplate/Flywheel:** LA 360, (Pre-Magnum) such as [BPP727360](https://blueprintengines.com/products/chrysler-sb-steel-sfi-flex-plate-la-360-sb-external-balance-chrysler-compatible) if paired with 727 transmission. **Stall Converter:** 2200 - 2600 rpm **Intake Manifold:** Dual plane, satin aluminum **Fuel Recommendation:** 91+ Octane Approved **Timing (Initial/Total Advance):** Initial timing - 10-16° and Total timing 32-34° **Firing Order:** 1,8,4,3,6,5,7,2 **Recommended Break in Oil:** [**BPP710 (Click Here)**](https://blueprintengines.com/products/blueprint-engines-crate-engine-break-in-oil-1-quart-bpp710) **Recommended Service Oil:** [**BPP10W30 (Click Here)**](https://blueprintengines.com/products/blueprint-engines-10w30-engine-oil-1-quart-bpp10w30) **Recommended Oil Filter:** [**BPP21085**](https://blueprintengines.com/products/chrysler-and-ford-sb-compatible-oil-filter-space-saver-size?_pos=1&_psq=BPP21085&_ss=e&_v=1.0) **or** [**BPP51515 (Click Here)**](https://blueprintengines.com/products/sbf-sbm-oil-filter-bpp51515) **Total Oil capacity with production oil pan, and Correct Filter**: 5 Quarts  - [General Support](https://knowledgebase.blueprintengines.com/knowledge/general-support?hsLang=en) - [Technical Support](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#main-content) - [General Engine FAQ](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#general-engine-faq) - [BluePrint GM Style Engines](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#blueprint-gm-style-engines) - [BluePrint Ford Style Engines](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#blueprint-ford-style-engines) - [Transmissions](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#transmissions) - [Fuel Systems](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#fuel-systems) - [Parts and Accessories](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#parts-and-accessories) - [Carburetors](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#carburetors) - [Alternator](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#alternator) - [Term X](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#term-x) - [Valve Train](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#valve-train) - [Factory Five FAQ](https://knowledgebase.blueprintengines.com/knowledge/factory-five-faq?hsLang=en) - [Engine Specs](https://knowledgebase.blueprintengines.com/knowledge/engine-specs?hsLang=en) - [Discontinued Engine Specs](https://knowledgebase.blueprintengines.com/knowledge/discontinued-engine-specs?hsLang=en#main-content) - [Engine Support](https://knowledgebase.blueprintengines.com/knowledge/discontinued-engine-specs?hsLang=en#engine-support) [![Chill listening crop-3](https://knowledgebase.blueprintengines.com/hs-fs/hubfs/IN%20CRATE%20ENGINES..png?width=92&height=24&name=IN%20CRATE%20ENGINES..png "Chill listening crop-3")](http://navy-blueprint-logo) www.blueprintengines.com Help Center Copyright © 2026, BluePrint Engines