The 602 crate engine is a Chevrolet 350 V8 designed for entry-level racing, delivering 350 HP and 390 lb-ft of torque. With a durable cast-iron block, Vortec heads, and simple maintenance, it’s a popular, reliable choice in many racing series.
The 602 crate engine, also known as the GM 350/602, has become a powerhouse in the world of grassroots racing. Designed by General Motors as an affordable, reliable, and performance-ready engine, the 602 crate engine is widely used in classes like dirt track racing and circle track racing, where balanced performance and cost-effectiveness are essential. For anyone interested in motorsports, understanding the 602 crate engine specs, its capabilities, and where it fits in the racing world is key.
In this blog post, we’ll break down the key specifications, features, and common questions about the 602 crate engine.
Contents
What is the 602 Crate Engine?
The 602 crate engine, officially known as the GM 350/290 HP Circle Track Crate Engine, is part of Chevrolet Performance’s popular crate engine lineup, specifically crafted for circle track racing. A “crate engine” is a complete engine package sold fully assembled and ready for installation, typically coming in a crate, hence the name.
GM developed the 602 engine as a reliable and affordable engine option that could fit into various racing formats, making it a staple for sportsman-level racers in many regional and local series.
The “602” designation comes from its production part number, and while it is often associated with limited horsepower, this engine is designed to deliver consistent performance on the track without requiring major modifications.
Key Specifications of the 602 Crate Engine
The 602 crate engine has a unique combination of features that make it ideal for entry-level racing. Here’s a breakdown of its most significant specifications:
| Specification | Details |
|---|---|
| Engine Type | Small-Block V8 |
| Displacement | 350 cubic inches (5.7L) |
| Compression Ratio | 9.1:1 |
| Horsepower | 350 HP at 5,000 RPM |
| Torque | 390 lb-ft at 3,800 RPM |
| Bore & Stroke | 4.000″ x 3.480″ |
| Valve Configuration | Hydraulic Flat-Tappet |
| Ignition | HEI (High Energy Ignition) |
| Fuel System | Carbureted |
| Recommended Fuel | 92 Octane |
| Max RPM | 5,500 RPM |
Features of the 602 Crate Engine
Here are the key features of the 602 crate engine:
Cast-Iron Block and Heads
The 602 crate engine comes with a cast-iron block and heads, which contribute to its durability and cost-effectiveness. Cast iron provides excellent strength and can withstand the high pressures typical in race engines.
One-Piece Rear Main Seal
A one-piece rear main seal minimizes the risk of oil leaks and enhances the engine’s reliability. This feature is especially advantageous in racing, where performance and minimal maintenance are essential.
Hydraulic Flat-Tappet Camshaft
The hydraulic flat-tappet camshaft in the 602 crate engine allows for more straightforward maintenance and reduces wear on other engine components. This type of camshaft offers a decent power curve, delivering a balance between performance and longevity.
High-Energy Ignition (HEI)
The HEI system provides a reliable spark, ensuring consistent combustion and maximizing the engine’s efficiency and performance. HEI is a common choice for performance engines due to its simplicity and robustness.
Vortec Cylinder Heads
Vortec heads are known for their excellent airflow characteristics, helping the engine generate more power. The design of the Vortec heads on the 602 crate engine optimizes air intake and fuel combustion for improved horsepower.
Benefits of the 602 Crate Engine
- Cost-Effective Power Solution
The 602 crate engine is popular among entry-level racers and hobbyists due to its affordability. It offers a considerable power output for the price, making it a budget-friendly option that doesn’t sacrifice performance. - Consistency and Reliability
This engine is built with racing reliability in mind. Many local and regional racing series, including IMCA, require the 602 crate engine as it maintains consistency across competitors, allowing skill and strategy to shine rather than equipment advantages. - Simplified Maintenance
The 602 crate engine’s components are selected to require less frequent and complex maintenance compared to other racing engines. This reduces the need for constant tuning and allows drivers to focus more on the race than on extensive engine upkeep. - Sanctioned Use Across Series
Many racing series, particularly in the U.S., have recognized the 602 crate engine as a sanctioned option for their races. This standardization makes it easier for racers to compete without needing specialized or modified engines, ensuring an even playing field.
Important Installation and Maintenance Tips
- Follow Break-In Procedures
Like most engines, the 602 crate engine requires a break-in period to achieve peak performance. Typically, this involves running the engine at low and moderate RPMs for the initial hours, avoiding prolonged high-RPM usage. Following the manufacturer’s break-in instructions can extend the engine’s lifespan and optimize its performance. - Maintain Oil Quality and Levels
High-quality engine oil is essential for any performance engine, especially for racing applications. Regularly checking and changing the oil helps keep the engine running smoothly and prevents wear on critical components. Using the right viscosity and type, as recommended by Chevrolet Performance, is also crucial. - Monitor Engine Temperature
Since racing engines run at high RPMs, they can generate excessive heat. Installing a high-quality cooling system, regularly checking the coolant levels, and monitoring engine temperature on the track will help prevent overheating, which could cause severe damage. - Inspect Valve Lash Regularly
While the hydraulic lifters in the 602 crate engine don’t require constant adjustment, periodic checks on valve lash can help ensure optimal performance and prevent potential issues over time.
Frequently Asked Questions
Here are some FAQs about 602 crate engine specs –
1. Can I modify my 602 crate engine?
While it is technically possible to modify the 602 crate engine, it is often discouraged, especially if you’re participating in a racing series. Many sanctioning bodies only allow sealed 602 crate engines to ensure a level playing field. If your goal is strictly performance upgrades, verify with the rules and regulations of your racing series before modifying any components.
2. What kind of fuel should I use?
Chevrolet recommends using at least 92 octane fuel for the 602 crate engine. While some racers experiment with different fuel mixtures for marginal gains, following the recommended octane level will generally provide the best balance between performance and engine longevity.
3. How long will the 602 crate engine last in racing conditions?
The lifespan of a 602 crate engine varies based on usage and maintenance. For example, consistently pushing the engine to its limits at high RPMs may shorten its life compared to moderate, regular use. With proper care, many racers report several seasons of reliable use before needing a rebuild or replacement.
4. Is the 602 crate engine suited for daily driving?
While technically possible, the 602 crate engine is designed for racing, not daily driving. Its characteristics, such as a carbureted fuel system and high-output performance tuning, may not make it the most practical or efficient choice for street use. However, some enthusiasts have successfully adapted it for street vehicles with modifications to fuel, ignition, and exhaust systems.
5. What series can I race with a 602 crate engine?
Many local and regional racing series allow the 602 crate engine, especially for entry-level classes like sportsman, street stock, and hobby stock. The engine is particularly popular in dirt track racing. Always check with the series’ rules to confirm whether the 602 crate engine is permitted and if any restrictions apply.
Final Thoughts
The 602 crate engine offers an accessible entry point for racers and car enthusiasts alike, delivering solid performance at an affordable price point. Its reliability, cost-effectiveness, and ability to fit into various racing formats make it a fantastic choice for those looking to get started in circle track racing. However, as with any racing engine, careful maintenance and adherence to best practices are essential for maximizing its potential and ensuring longevity on the track.
Whether you’re an amateur racer or a seasoned driver, the 602 crate engine stands as a testament to Chevrolet Performance’s dedication to providing high-quality engines for all levels of racing. If you’re seeking a straightforward, dependable engine solution with the backing of a reputable manufacturer, the 602 crate engine is hard to beat.