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Horsepower & Torque: 405 Horsepower / 450 ft. lbs. Torque
Cylinder Heads: Cast Iron Vortec
Compression Ratio: 9.5:1
Camshaft: Hydraulic Roller Cam - .495 Intake / .502 Exhaust Lift and 220 Intake / 224 Exhaust Duration @ .050 - 114° LSA
Pistons: Hypereutectic
Crankshaft: Cast Crank - 3.750" Stroke and 5.700" Rods
Fuel Recommendation: 91+ Octane
- Description
- Engine Specs
- Parts & Accessories
- Warranty
Overview:
Description:
- Horsepower & Torque: 405 Horsepower / 450 ft. lbs. Torque
- Compression Ratio: 9.5:1
- Cast Iron Heads
- BluePrint Engines Hydraulic Roller Cam
- BluePrint Engines Cast Crankshaft
- BluePrint Engines Hypereutectic Pistons
Block:
- BluePrint Engines High Strength Cast Iron 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
- 4-Bolt Main
- 4.000" Bore
- 1-Piece Rear Main Seal
- Mech Fuel Pump Provision: Yes
- Passenger Side Dipstick Drilled and Tapped for Clutch Linkage
Rotating Assembly:
- Cast Crankshaft
- 3.750" Stroke
- OEM Type 5.700" Connecting Rods w/ 150,000 PSI Bolts
- Hypereutectic Pistons
- External Front/ External Rear Engine Balance
Cylinder Heads:
- Vortec Cast Iron Cylinder Heads
- 1.94 Intake Valves
- 1.50 Exhaust Valves
- Hardened Push Rods
- Long Slot Rockers with Positive Lock Adjusting Nuts
Cam Specs:
- Hydraulic Roller
- .495 Intake / .502 Exhaust Lift
- 220 Intake / 224 Exhaust Duration
- @.050-114 Degree Lobe Separation
- Using 1.5 Rocker's
Also Includes:
- Marine Intake Manifold
- Valve Covers
- Oil Pan
Notes:
- This engine is designed for CARBURETED use only. It is NOT for use in any factory fuel injected applications.
- Replaces Standard Rotation engines only. Not available as reverse rotation.
- BluePrint Engines recommends the use of a flame arrestor in marine applications and advises checking local laws to ensure compliance with the United States Coast Guard Requirements for Ignition Protection & Fire Resistance.
Cylinder Heads
Cast Iron Vortec
Ignition Timing
Initial Timing 10-16 - Total Timing 32-34
Spark Plug
.045 in.
Firing Order
1,8,4,3,6,5,7,2
Rotating Assembly
Cast Crank - 3.75 in. Stroke and 5.7 in. Rods
Cam Specs
Hydraulic Roller - .495 Intake / .502 Exhaust Lift- 220 Intake / 224 Exhaust Duration - @ .050-114 LSA
Stall Converter
N/A
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.
Parts & Accessories Specs
| Intake Manifold | Marine, Aluminum |
|---|---|
| Spark Plug (Not Included) | AC Delco 41-993 |
| Harmonic Balancer (Not Included) | BPP400L |
| Flexplate/Flywheel (Not Included) | BPP871006 |
| Fuel Recommendation | 91 Octane |
Header Partners:
- Click Here for our Header Partners and recommendations.
Better Than the Rest.
The satisfaction of our customers is our highest priority at BluePrint Engines. Every engine we build is assembled with premium components, balanced to within two grams, and dyno-tested to verify real horsepower and torque before it leaves our facility.
All BluePrint products include warranty protection designed specifically for how they're used. Our complete crate engines carry our industry-leading 30-month / 50,000-mile warranty, offering the confidence and peace of mind serious builders expect. Other BluePrint products—including bare blocks, marine engines, transmissions, race applications, and cylinder heads—feature warranty coverage tailored to their intended use and operating conditions.
For full terms and specific coverage by product category, download our warranty guide below. It contains complete details, limitations, and instructions for warranty registration and claims.
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Register NowEVERY BLUEPRINT ENGINE ACES THE DYNO TEST
We make sure we hit our target horsepower and proper torque with every crate engine. We use an advanced computerized balancer in our in-house dyno testing rooms to get our rotating assemblies within two grams, ensuring silky smooth power over the entire RPM range. That’s precisely why our engines sound and run better than our competitors.
All specs, zero speculation: A comprehensive, dyno-generated printout showing your critical engine specs will accompany your delivered engine — every time. No more guessing or wondering what your installed engine’s real-world peak horsepower and torque ratings actually are. Any doubters in the crowd? Simply flash ‘em your exact engine’s dyno results.