How To Make A 350 A 383

How to Turn a 350 Small Block Chevy into a 383 Stroker

The legendary small-block Chevy 350 is a workhorse, but some crave more power. A 383 stroker engine offers a significant horsepower bump without breaking the bank or requiring a complete engine overhaul. This guide will walk you through the key steps involved in transforming your 350 into a powerful 383. Disclaimer: This is a high-level overview; professional installation is strongly recommended.

Understanding the Conversion: From 350 to 383

The core of the 383 stroker build lies in increasing the engine's displacement. This is achieved primarily by increasing the stroke of the crankshaft. A standard 350 typically has a 3.48-inch stroke. To create a 383, you'll need a crankshaft with a longer stroke, generally around 3.75 inches. This, combined with the existing bore (usually 4.00 inches), results in a larger displacement.

Key Components for Your 383 Stroker Build

Here's a breakdown of the essential parts you'll need to gather for your 350 to 383 conversion:

1. Crankshaft: The Heart of the Stroker

This is the most crucial component. You'll need a 3.75-inch stroke crankshaft specifically designed for a small-block Chevy. Ensure it's balanced and properly weighted for optimal performance and longevity.

2. Connecting Rods: Matching the Stroke

The connecting rods must be compatible with the longer stroke of the crankshaft. Forged connecting rods are generally preferred for their strength and durability under the increased stress of a larger displacement engine.

3. Pistons: Custom-Made for the Build

Standard 350 pistons won't work with the longer stroke. You'll need custom-forged pistons designed to work with your chosen crankshaft and connecting rods. Pay close attention to the piston-to-wall clearance for optimal performance and to prevent damage.

4. Piston Rings: Maintaining Compression

New piston rings are essential to maintain proper compression and prevent blow-by. High-quality rings designed for high-performance applications are recommended.

5. Cylinder Heads: Flow is Key

While not strictly required for the displacement increase, upgrading your cylinder heads can dramatically improve airflow and power output. Performance cylinder heads with larger valves and optimized porting will greatly enhance the engine's potential.

6. Gaskets and Seals: Maintaining a Tight Seal

All new gaskets and seals are crucial to prevent leaks and ensure proper engine operation. Don't skimp on this step.

The Build Process: A Step-by-Step Overview

The actual process of building a 383 stroker is complex and requires mechanical expertise. However, here's a simplified overview:

1. Disassembly: Carefully disassemble your 350 engine, documenting each step.
2. Block Preparation: Clean and inspect the engine block for any damage. Honing or boring may be necessary depending on the condition of the cylinder walls.
3. Assembly: Install the crankshaft, connecting rods, pistons, and rings. Precise measurements and proper assembly techniques are essential to prevent damage.
4. Cylinder Head Installation: Install your chosen cylinder heads, ensuring proper torque and gasket sealing.
5. Final Assembly: Complete the assembly process, including the intake manifold, carburetor (or fuel injection system), valve covers, and other components.

Optimizing Your 383 Stroker

Once the build is complete, proper tuning is crucial. This includes:

• Engine break-in: A proper break-in period is vital for the longevity of the engine.
• Fuel delivery: Ensure proper fuel delivery and air/fuel mixture for optimal combustion.
• Ignition timing: Accurate ignition timing is essential for maximum power and efficiency.

Building a 383 stroker is a significant undertaking. This guide provides a basic understanding. Consult with experienced engine builders and utilize detailed engine building manuals for precise instructions and crucial details. Remember safety first, and always work in a clean and well-organized workspace.