The 604 crate engine is a 350-cubic-inch V8 delivering 400 HP and 400 lb-ft of torque. It features a cast iron block, aluminum heads, and a factory-sealed design, making it reliable and cost-effective for circle track racing.
The Chevrolet 604 crate engine, also known as the CT400, is a powerful and reliable option for circle track racing. Designed by Chevrolet Performance, this 350-cubic-inch small-block V8 is factory-sealed to ensure cost-effective and fair competition. With its impressive 400 horsepower and 400 lb-ft of torque, the 604 engine strikes the perfect balance between performance, durability, and affordability.
However you race on dirt or asphalt, knowledge about the specs and features of the 604 crate engine can help you make the most of the setup.
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604 Crate Engine
The 604 crate engine, also known as the CT400, is a factory-sealed small-block V8 engine designed specifically for circle track racing. It’s built to offer competitive performance within the constraints of racing series that mandate sealed engines, ensuring cost containment and a level playing field for racers.
Manufactured by Chevrolet Performance, the 604 engine is built with high-quality components that deliver reliability and consistency, even under demanding racing conditions.
604 Crate Engine Specs
Here’s a breakdown of the major specifications:
| Specification | Details |
|---|---|
| Engine Type | Small-Block V8 |
| Displacement | 350 cubic inches (5.7L) |
| Bore x Stroke | 4.00″ x 3.48″ |
| Compression Ratio | 9.72:1 |
| Block Material | Cast Iron |
| Cylinder Head Material | Aluminum |
| Valvetrain | Hydraulic Roller Camshaft |
| Max RPM | 6000 RPM |
| Horsepower | 400 HP at 5500 RPM |
| Torque | 400 lb-ft at 4500 RPM |
| Intake Manifold | High-Rise Aluminum |
| Carburetor Compatibility | 4-Barrel |
| Oil Pan | 8-Quart Circle Track Racing Pan |
Key Features of the 604 Crate Engine
The Chevrolet 604 crate engine is designed with performance and reliability in mind, making it a top choice for competitive racing. Here are its standout features:
1. High-Performance Aluminum Heads
The 604 features aluminum cylinder heads with a high-flow design, improving airflow and combustion efficiency. This contributes to the engine’s balance of power and durability.
2. Hydraulic Roller Camshaft
The hydraulic roller camshaft is designed for consistent performance and low maintenance, providing smooth operation and reliable valve timing for circle track applications.
3. Durable Cast Iron Block
The cast iron engine block ensures structural integrity, making the engine capable of withstanding the stresses of high-rev racing conditions.
4. Racing-Ready Oiling System
Equipped with an 8-quart oil pan and a high-volume oil pump, the 604 crate engine is designed to maintain optimal lubrication during intense racing conditions, reducing the risk of engine wear and overheating.
5. Sealed Design
The 604 engine is factory-sealed, making it compliant with many racing series rules that prohibit engine modifications. This ensures cost-effectiveness and fairness in competition.
6. Affordable Performance
Compared to custom-built racing engines, the 604 offers excellent performance at a fraction of the cost, making it a popular choice for grassroots and semi-professional racers.
Applications of the 604 Crate Engine
The 604 crate engine is specifically designed for circle track racing and is commonly used in:
- Dirt Track Late Models
- Asphalt Late Models
- Modified Racing Series
- Street Stock Racing
The engine’s performance characteristics, reliability, and adherence to sealed-engine rules make it ideal for these competitive environments.
604 Crate Engine Maintenance and Tuning
While the 604 crate engine is designed for durability, regular maintenance is essential to keep it performing at its best. Here are some tips:
- Oil Changes: Use high-quality racing oil and change it regularly to prevent buildup and wear.
- Cooling System: Ensure the radiator and water pump are in good condition to avoid overheating.
- Spark Plugs: Check and replace spark plugs periodically to maintain consistent ignition.
- Timing: Verify timing settings to ensure optimal performance within racing regulations.
- Inspections: Inspect the engine for leaks, wear, or other potential issues after each race.
Advantages of the 604 Crate Engine
The Chevrolet 604 crate engine offers several benefits that make it a popular choice for circle track racing:
- Cost-Effective: Offers competitive performance without the high cost of a custom-built racing engine.
- Factory-Sealed: Levels the playing field in racing series by preventing modifications.
- Durable Design: Built to handle the demands of high-rev racing environments.
- Plug-and-Play Installation: Simplifies the process for racers looking to get on the track quickly.
- Widely Accepted: Meets the requirements for many racing series, ensuring compatibility with various rules.
Frequently Asked Questions
Here are some FAQs about 604 crate engine –
1. Can the 604 crate engine be rebuilt?
Yes, the 604 crate engine can be rebuilt, but doing so may make it ineligible for certain sealed-engine racing series. Always check with your racing organization before rebuilding.
2. What fuel should be used with the 604 crate engine?
The engine is designed to run on high-octane racing fuel. Using lower-octane fuel may result in knocking or reduced performance.
3. How does the 604 compare to the 602 crate engine?
The 604 offers higher performance than the 602, with aluminum heads, a higher compression ratio, and more horsepower and torque. However, it is also more expensive. The 602 is often preferred for entry-level or budget-conscious racing.
4. Is the 604 crate engine legal in all racing series?
The engine is legal in many circle track racing series, but specific rules vary. Always verify with your racing organization to ensure compliance.
5. How much does a 604 crate engine cost?
The 604 crate engine typically costs between $7,000 and $8,500, depending on the retailer and additional components included.
Conclusion
The Chevrolet 604 crate engine is a tried-and-true choice for circle track racers seeking a reliable, cost-effective, and competitive powerplant. With its robust construction, factory-sealed design, and impressive performance specifications, the 604 delivers on all fronts for both dirt and asphalt racing applications.
However you’re a seasoned racer or just starting in the world of motorsports, the 604 crate engine offers a well-balanced solution that combines affordability with competitive power. Proper maintenance and adherence to racing regulations will ensure you get the most out of this high-performance engine.