--- title: BP49611CT Series description: GM Big Block Compatible 496 c.i. Power Adder Engine - 561 Horsepower --- [Skip to content](https://knowledgebase.blueprintengines.com/knowledge/bp49611ct-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) # BP49611CT Series ## Horsepower & Torque: 561 Horsepower / 512 ft. lbs. Torque Cylinder Heads: BluePrint Engines Aluminum Cylinder Heads Compression Ratio: 8.8:1 Camshaft: Hydraulic Roller Cam - .540 Intake / .560 Exhaust Lift and 242 Intake / 248 Exhaust Duration @.050-114° LSA Pistons: Forged Crankshaft: Steel Crank - 4.250" Stroke and 6.385" Rods Fuel Recommendation: 87+ Octane #### Description: - Horsepower & Torque: 561 Horsepower / 512 ft. lbs. Torque - Compression Ratio: 8.8:1 - BluePrint Engines Aluminum Heads - BluePrint Engines Hydraulic Roller Cam - BluePrint Engines Forged Crank - BluePrint Engines Forged Pistons #### Block: - BluePrint Engines High Strength Cast Iron Block, 454 BBC - Manufactured and Machined in the USA! - Mech Fuel Pump Provision: Yes - 1-Piece Rear Main Seal - Standard Deck - 4-Bolt Main - 4.310" Bore #### Rotating Assembly: - Dual Keyway Crankshaft - 4.250" Stroke - Forged H-beam 6.385" Connecting Rods - Forged Pistons - Internally Balanced Front and Rear #### Cylinder Heads: - BluePrint Aluminum Cylinder Heads - [PS8013](https://blueprintengines.com/collections/cylinder-heads/products/bb-chevy-aluminum-cylinder-head-316cc-assembled-ps8013) - 119cc Chamber - 2.30" Intake / 1.88" Exhaust Valves - 316cc Intake / 124cc Exhaust Runners - Cylinder Heads Feature a .300 in. Raised Exhaust Port vs an OEM Casting - Must Verify Header / Exhaust Clearance #### Cam Specs: - Hydraulic Roller - .540 Intake / .560 Exhaust Lift - 242 Intake / 248 Exhaust Duration - @ .050-114 Degree Lobe Separation #### Ignition Timing: - 10-16° and Total Timing 32-34° #### Also Includes: - Harmonic Balancer - Timing Cover - Valve Covers - Dipstick - Oil Pan #### Notes: - Not for EGR. - Built to accept Power Adders - Turbo chargers, superchargers, NOS etc. - Built with Dual Keyway Crankshaft for Harmonic Balancer - SFI Harmonic Balancer included on engine   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:** BP49611CT **Fuel Delivery Type:** Carbureted, 850cfm \*\*Not included\*\* **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:** [BPP454I](https://blueprintengines.com/products/chevy-big-block-harmonic-balancer-internally-balanced-bpp454i) - Internally Balanced **Flexplate/Flywheel:** Internally Balanced **Stall Converter:** 2200-2500 rpm **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 **Notes:** Built to accept Power Adders. **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 Filter**: 8 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