How many valves does a small block Chevy have?
Typically, a traditional small-block Chevy V8 has 16 valves in total (two valves per cylinder). Modern LS-family small-block engines, which are also considered part of the small-block lineage by many enthusiasts, use 32 valves (four per cylinder).
The phrase “small-block Chevy” covers multiple generations. The early, classic small-blocks used 2 valves per cylinder, while the later Gen III/IV LS engines switch to 4 valves per cylinder. Both are V8 pushrod designs, but the valve count differs by generation and design philosophy.
Valve counts by generation
The following outlines the typical valve configurations for the most commonly discussed blocks in the small-block Chevy family.
- Classic small-block Chevy (original/Historic SBC): 2 valves per cylinder, 8 cylinders × 2 = 16 valves total.
- Gen III/IV small-block (LS family, modern era): 4 valves per cylinder, 8 cylinders × 4 = 32 valves total.
In practice, these counts reflect the two dominant configurations you’ll encounter. Always verify the exact engine code on a specific vehicle to confirm the precise valve count.
Practical implications
The two-valve-per-cylinder design emphasizes simplicity and strong low-end torque, with easier maintenance and lower cost heads. The four-valve-per-cylinder LS designs enable improved high-RPM breathing and higher potential power, though they come with different parts, tuning, and maintenance considerations, all while maintaining a pushrod architecture.
Summary
Short recap: A traditional small-block Chevy has 16 valves. Modern LS-based small-blocks have 32 valves. The exact count depends on the generation and engine model, so check the specific engine code to be certain.
Is a 350 and a 5.7 the same motor?
The Chevy 350 engine is commonly referred to as a 5.7L due to its displacement (350 cubic inches ˜ 5.7 liters).
Are Chevy 305 and 350 blocks the same size?
And belts. So there's really only one difference well There's more than one but there's one basic difference between a 350 and a 305. And that is the bore. Size. So this is a 305 Chevy.
What does 32 valve engine mean?
A '32-valve' Northstar engine means it has 4 valves per cylinder, totaling 32 valves in an 8-cylinder V8 layout. Valves control air-fuel intake and exhaust flow. To identify if an engine is a 4-cylinder, V6, or V8, check the cylinder count and arrangement: inline for 4-cylinder, V-shaped for V6 or V8.
Which is better, 4 valve or 2 valve?
The four engines produce a higher torque and power than the two-valve engines. Though the 4 valve is more expensive than the 2 valve, it offers better fuel efficiency. In our country, there is a limit on the CC (cubic capacity), which means one needs a special permit to ride a bike over 165cc engines.
