The Chevrolet 302 engine is one of the most legendary small-block V8s ever produced. Designed specifically for SCCA Trans-Am racing homologation, the 302 cubic-inch V8 powered the iconic 1967–1969 Camaro Z/28 and became famous for its high-revving performance, racing heritage, and collector appeal.
Unlike traditional torque-focused small-block engines, the Chevy 302 was engineered to produce power at high RPM. Its unique combination of a 4.00-inch bore and 3.00-inch stroke created a free-revving engine that helped establish the Camaro Z/28 as a serious performance machine.
Chevy 302 Engine Overview
The Chevrolet 302 was introduced in 1967 specifically to meet SCCA Trans-Am racing rules, which limited engine displacement to 305 cubic inches. Chevrolet engineers combined the 327 crankshaft with a 283 block architecture to create a 302 cubic-inch engine that could compete effectively on the racetrack.
Although factory-rated at 290 horsepower, many enthusiasts and historians believe actual output exceeded 350 horsepower when properly tuned. The conservative rating was partly due to insurance concerns and the performance-car environment of the late 1960s.
302 Chevy Engine Specifications
Oil Capacity & Oil Type
Proper lubrication is critical for protecting the high-revving internals of the 302 engine. Modern high-zinc oils are often recommended for classic flat-tappet camshaft engines.
Recommended Oil: SAE 10W-30 or 10W-40 High-Zinc Oil
Oil Capacity: Approximately 5 Quarts (With Filter)
Oil Change Interval: Every 3,000 Miles or Annually
Vehicles Equipped With The Chevy 302
The Chevy 302 was primarily available in one vehicle family.
Why The 302 Became Legendary
- Developed specifically for Trans-Am racing
- Exclusive to the Camaro Z/28
- High-revving design capable of 7,000+ RPM
- Strong aftermarket support
- Rare production numbers compared to other small-blocks
- One of Chevrolet’s most collectible V8 engines
Performance Characteristics
Unlike larger displacement small-blocks that emphasize low-end torque, the 302 thrives at higher RPMs. Its short-stroke design allows the engine to rev freely and deliver power throughout the upper portion of the tachometer.
Performance Highlights
- High RPM Capability
- Excellent Throttle Response
- Strong Mid-Range Power
- Race-Proven Architecture
- Lightweight Small-Block Design
Reliability
The Chevy 302 is generally regarded as a durable and reliable engine when maintained properly. Its forged internals and robust small-block architecture make it capable of handling aggressive driving and racing applications.
Because most surviving examples are more than 50 years old, reliability today depends heavily on rebuild quality, maintenance history, and component condition.
Common Issues
Oil Leaks
Older gaskets and seals commonly develop leaks over time.
Flat-Tappet Cam Wear
Improper oil selection can accelerate camshaft and lifter wear.
Cooling System Issues
Vintage radiators and water pumps may require upgrading.
Carburetor Tuning
Proper tuning is essential for peak performance and drivability.
Popular Performance Upgrades
- Performance Camshaft
- Aluminum Cylinder Heads
- Headers
- High-Flow Intake Manifold
- Upgraded Ignition System
- Roller Rockers
- Modern Carburetor Tuning
- Performance Exhaust System
Maintenance Schedule
Frequently Asked Questions
How much horsepower does a Chevy 302 make?
The factory rating was 290 horsepower, though actual output was often believed to exceed 350 horsepower.
What is the displacement of a Chevy 302?
The engine displaces 302 cubic inches or approximately 4.9 liters.
What vehicles used the Chevy 302?
The 302 was primarily available in the 1967–1969 Chevrolet Camaro Z/28.
How much oil does a Chevy 302 hold?
The engine typically holds approximately 5 quarts of oil including the filter.
Why is the Chevy 302 special?
It was designed specifically for Trans-Am racing homologation and became one of Chevrolet’s most famous performance engines.
Final Thoughts
The Chevrolet 302 remains one of the most respected small-block V8 engines ever built. Combining racing heritage, high-revving performance, rarity, and legendary Camaro Z/28 status, the 302 continues to attract collectors, restorers, and muscle car enthusiasts worldwide. More than five decades after its introduction, it remains an icon of American performance engineering.