--- title: BP4003CT1 Series description: GM Small Block Compatible 400 c.i. Power Adder Engine - 511 Horsepower --- [Skip to content](https://knowledgebase.blueprintengines.com/knowledge/bp4003ct1-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) # BP4003CT1 Series ## Horsepower & Torque: 511 Horsepower / 480 FT. LBS. Torque Cylinder Heads: BluePrint Engines Aluminum Cylinder Heads Compression Ratio: 9.5:1 Camshaft: Hydraulic Roller Cam - .555 Intake .577 Exhaust Lift and 236 Intake / 248 Exhaust Duration @ .050 - 113° LSA Pistons: Forged  Crankshaft: Forged Steel Crank - 3.750" Stroke and Forged 6.000" Rods  Fuel Recommendation: 87+ Octane #### Overview: This power adder engine is engineered to handle any type of forced induction. Whether you’re adding nitrous, a supercharger, or turbos, this long block has the strength and reliability to take the boost. #### Description: - Horsepower & Torque: 511 Horsepower / 480 FT. LBS. Torque - Compression Ratio: 9.5:1 - Aluminum Heads - Hydraulic Roller Cam - Forged Steel Crank - Forged Pistons #### Block: - BluePrint Engines High Strength Cast Iron Block - Manufactured and Machined in the USA! - 4-Bolt Main - 4.125" Bore - 1-Piece Rear Main Seal - Mech Fuel Pump Provision: Yes - Passenger Side Dipstick - Drilled and Tapped for Clutch Linkage #### Rotating Assembly: - New BluePrint Forged Steel Crankshaft - 3.750" Stroke - 6.000" Forged Connecting Rods - Forged Pistons - Internal Front/ External Rear Engine Balance - Dual Keyway Damper installed #### Cylinder Heads: - BluePrint Aluminum Cylinder Heads - [HP8103](https://blueprintengines.com/collections/cylinder-heads/products/sb-chevy-aluminum-cylinder-head-220cc-assembled-hp8103) - 64cc Chamber - 2.08" Intake / 1.60" Exhaust Valves - 220cc Intake / 67cc Exhaust Runners #### Cam Specs: - Cam Type: Roller - .555 Intake / .577 Exhaust Lift - 236 Intake / 248 Exhaust Duration - @.050-113 Degree Lobe Separation - 1.6 Roller Rockers #### Ignition Timing: - 10-16° Initial and Total Timing 32-34° at 3500 RPM #### Also Includes: - Valve Covers - Oil Pan - Timing Cover #### Notes: - NEW BluePrint block manufactured and machined in the USA! - Not for EGR. - This engine is designed to be capable of running power adders - turbo chargers, Nitrous oxide, superchargers, blowers etc. - Built with a Dual Keyway crankshaft. Balancer included. - The performance aluminum cylinder heads on this engine feature a .500 raised port vs OEM.   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:** BP4003CT1 **Fuel Delivery Type:** Carbureted **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:** [BPP350](https://blueprintengines.com/products/chevy-small-block-harmonic-balancer-internally-balanced-bpp350) - Non Weighted, 8" diameter **Flexplate/Flywheel:** Late 350 weighted **Stall Converter:** 2400+ **Intake Manifold:** N/A **Fuel Recommendation:** 87+ 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 ;** [**BPP51061 (Click Here)**](https://blueprintengines.com/products/sbc-bbc-oil-filter-bpp51061) **Total Oil capacity with production oil pan, and Correct** [**BPP51061**](https://blueprintengines.com/products/sbc-bbc-oil-filter-bpp51061)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