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Horsepower & Torque: 638 Horsepower / 540 ft. lbs. Torque
Cylinder Heads: BluePrint Engines LS3 Aluminum Cylinder Heads
Compression Ratio: 11:1
Camshaft: Hydraulic Roller Cam - .646 Intake / .646 Exhaust Lift and 254 Intake / 266 Exhaust Duration @.050-113° LSA - Three Bolt Cam
Pistons: Mahle 4032 Custom Forged
Crankshaft: Forged Crank - 4.125" Stroke and 6.125" Rods
This engine Does NOT come with a Fuel Injection ECU and Wiring Harness.
Requires Race Fuel of 100+ Octane
- Description
- Engine Specs
- Parts & Accessories
- Warranty
**BluePrint Motorsports engines are built for maximum performance and are intended for extreme duty race applications. If this engine is used in a street application our normal 30 month, 50,000-mile warranty applies, if used in sanctioned racing no warranty, expressed, or implied.
Overview:
The LS-compatible platform is the king of street machines—and this BluePrint Engines 427 c.i. Pro Series monster proves why. Unleash raw, LS-powered fury with a street-scorching ??? horsepower and ??? ft-lbs of torque. This beast has BluePrint aluminum heads, a hydraulic roller cam, and hypereutectic pistons, and forged crankshaft, all locked into a high-strength LSX-style cast iron block.
Description:
- Horsepower & Torque: 638 Horsepower / 540 ft. lbs. Torque
- Compression Ratio: 11:1
- BluePrint Engines LS3 Aluminum Heads
- BluePrint Engines Hydraulic Roller Cam
- BluePrint Engines Forged Crankshaft
- Mahle 4032 Custom Forged Pistons
Block:
- BluePrint Engines High Strength Cast Iron (LSX Style) Block
- Increased Deck Thickness and Strength Webbing
- Utilizes OEM LS3 Front and Rear Covers
- Improved Water Jacket Design
- Extended Cylinder Skirt
- 1-piece Rear Main Seal
- Priority Main Oiling
- 4.0695" Bore
- 6-bolt Main
Rotating Assembly:
- Forged Crankshaft
- 4.125" Stroke
- Forged 6.125" Connecting Rods
- Mahle Custom 4032 Forged Pistons
- Internally Balanced Front and Rear
Cylinder Heads:
- BluePrint Aluminum Cylinder Heads -PS8015
- 70cc Chamber
- 2.165" Intake / 1.600" Exhaust Valves
- 259cc Intake / 102cc Exhaust Runners
Cam Specs:
- Hydraulic Roller
- .646 intake / .646 Exhaust Lift
- 254 Intake / 266 Exhaust Duration
- @.050-113 Degree Lobe Separation
Also Includes:
- This engine does NOT come with a Fuel Injection ECU and Wiring Harness
- Harmonic Balancer
- Valve Covers
- LS Swap Oil Pan
- Timing Cover
Notes:
- BluePrint Motorsports engines are built for maximum performance and are intended for extreme duty applications. Because of the high-stress nature of their use, these engines are sold without any warranty, expressed, or implied.
Blocks
- BluePrint Engines High Strength Cast Iron (LSX Style) Block
- Increased Deck Thickness and Strength Webbing
- Utilizes OEM LS3 Front and Rear Covers
- Improved Water Jacket Design
- Extended Cylinder Skirt
- 1-piece Rear Main Seal
- Priority Main Oiling
- 4.0695" Bore
- 6-bolt Main
Cylinder Heads
- BluePrint Aluminum Cylinder Heads -PS8015
- 70cc Chamber
- 2.165" Intake / 1.600" Exhaust Valves
- 259cc Intake / 102cc Exhaust Runners
Ignition Timing
Timing (Initial/Total Advance): Ignition timing and spark advance are controlled by Powertrain Control Module
Spark Plug
.045"
Firing Order
1,8,7,2,6,5,4,3
Rotating Assembly
- Forged Crankshaft
- 4.125" Stroke
- Forged 6.125" Connecting Rods
- Mahle Custom 4032 Forged Pistons
- Internally Balanced Front and Rear
Cam Specs
- Hydraulic Roller
- .646 intake / .646 Exhaust Lift
- 254 Intake / 266 Exhaust Duration
- @.050-113 Degree Lobe Separation
Stall Converter
Customer should match engine output and car setup to find best converter.
Also Includes
- This engine does NOT come with a Fuel Injection ECU and Wiring Harness
- Harmonic Balancer
- Valve Covers
- LS Swap Oil Pan
- Timing Cover
Notes
BluePrint Motorsports engines are built for maximum performance and are intended for extreme duty applications. Because of the high-stress nature of their use, these engines are sold without any warranty, expressed, or implied.
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 (Not Included) | NA |
|---|---|
| Spark Plug (Not Included) | CCH9405 (Not Included) Customer req to adjust heat range/gap per their fuel type and aspiration. |
| Harmonic Balancer (Not Included) | Non-Weighted |
| Flexplate/Flywheel (Not Included) | Non-Weighted |
| Fuel Recommendation | Requires Race Fuel of 100+ Octane |
| Recommended Service Oil | BPP10W30 |
| Recommended Oil Filter | BPPB160 |
| Total Oil Capacity with Production Oil Pan, and Correct Filter | 6 Quarts |
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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Protect your investment by registering your warranty today. Register below to ensure coverage and stay up to date on important service information.
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.