* Your definition of "streetable": Is it a daily driver? Weekend cruiser? How much vacuum do you need for power brakes and accessories? How much noise and vibration are you willing to tolerate? What's your tolerance for a less-than-ideal idle?
* Your engine build: The camshaft must be matched to the rest of your engine. Compression ratio, intake and exhaust manifolds, heads, and transmission all influence camshaft selection. A radical cam in a low-compression engine will be a dog. A mild cam in a high-compression, high-flow engine will be underwhelming.
* Your intended use: A camshaft optimized for low-end torque will be different from one designed for high-RPM horsepower.
Generally, a camshaft with a duration in the 224-236 degrees duration at 0.050" lift range (advertised duration will be higher) is considered a solid starting point for a relatively large, yet still streetable cam in a Chevy 350 small-block. However, even within this range, lobe separation angles and lift significantly impact performance and driveability.
To find the *best* cam for *your* application:
1. Determine your budget: Higher-quality cams with better materials and manufacturing will generally perform better and last longer.
2. Specify your engine build: List all the relevant components (heads, intake, compression ratio, transmission type).
3. Define your driving style and expectations: Be honest about how much compromise you're willing to make on drivability for performance gains.
4. Consult with a camshaft specialist or engine builder: They can help you select the optimal cam based on your specific needs and goals. Companies like Comp Cams, Crane Cams, and Lunati offer extensive selection guides and technical support. They can recommend a cam that balances power with a tolerable idle and vacuum.
Choosing a cam is a critical decision that affects multiple aspects of your engine's performance and usability. Don't just look for the "biggest" cam; find the *best* cam for your application.
