How To Build A 347 Stroker

How to Build a 347 Stroker Engine: A Comprehensive Guide

Building a 347 stroker engine is a significant undertaking, requiring precision, patience, and a solid understanding of internal combustion engines. This comprehensive guide will walk you through the process, providing you with the knowledge and steps to successfully build your own powerful 347 stroker. This guide focuses on the Small Block Ford (SBF) platform, as it's a popular choice for stroker builds. However, many principles apply to other engine types as well.

Planning Your 347 Stroker Build

Before you even touch a wrench, meticulous planning is crucial. This phase ensures a smoother, more successful build.

1. Defining Your Goals:

• Intended Use: What will your 347 stroker power? A street car? A race car? This determines your power needs and the components you select.
• Budget: Stroker builds can range widely in cost. Establish a clear budget to guide your component selection.
• Power Output Goals: How much horsepower and torque are you aiming for? This influences your choice of crankshaft, connecting rods, pistons, and other performance parts.

2. Gathering the Necessary Components:

• Short Block: This includes the block itself, crankshaft, connecting rods, pistons, and related gaskets. Choosing the right crankshaft stroke (3.25" for a true 347) is essential. Consider the material and design for optimal strength and durability.
• Cylinder Heads: Select heads appropriate for your power goals. Higher flowing heads are ideal for more power.
• Valvetrain: This encompasses the camshaft, lifters, pushrods, rocker arms, and valve springs. Proper selection is critical for optimal performance.
• Intake Manifold: Choose a manifold that matches your engine's capabilities and your fuel delivery system (carburetor or fuel injection).
• Fuel System: Select a fuel system capable of delivering the necessary fuel for your target horsepower.
• Ignition System: An upgraded ignition system is often necessary for reliable performance at higher RPMs.

The Build Process: A Step-by-Step Guide

The following steps represent a simplified overview. Each step involves numerous sub-steps and requires specialized tools and knowledge. Consult detailed engine building manuals and resources for in-depth instructions.

1. Block Preparation:

Thoroughly clean the engine block. Inspect for cracks or damage. If necessary, have it professionally machined to ensure a proper foundation.

2. Crankshaft Installation:

Carefully install the crankshaft, ensuring proper alignment and clearance. Proper lubrication is vital.

3. Connecting Rod and Piston Installation:

Install the connecting rods and pistons, paying close attention to the piston-to-wall clearance and ring gaps. This step requires precision and specialized tools.

4. Cylinder Head Installation:

Install the cylinder heads, ensuring proper gasket seating and torque specifications.

5. Valvetrain Assembly:

Install the camshaft, lifters, pushrods, rocker arms, and valve springs. Proper adjustment and lubrication are key.

6. Intake Manifold and Fuel System Installation:

Install the intake manifold and fuel system components, ensuring proper sealing and connections.

7. Ignition System Installation:

Install the ignition system components, connecting them to the distributor and engine wiring harness.

8. Final Assembly:

Complete the final assembly, including oil pan, timing cover, and other peripheral components.

Tuning and Testing Your 347 Stroker

After assembly, careful break-in and tuning are essential. This ensures your engine's longevity and optimal performance. This often involves professional dyno tuning to fine-tune the fuel mixture and ignition timing.

Conclusion: Building Your Dream Engine

Building a 347 stroker engine is a challenging yet rewarding experience. This guide serves as a starting point. Remember to consult comprehensive engine building manuals, seek advice from experienced engine builders, and prioritize safety throughout the process. With careful planning and execution, you can successfully build a powerful and reliable 347 stroker that will provide years of enjoyment.