The Chevrolet small-block 350 is an American icon, a legendary engine celebrated for its reliability and potential for modification. If you're looking to breathe new life into your 350, a mild camshaft upgrade is a fantastic starting point. This guide will walk you through everything you need to know about choosing and installing a Chevy 350 mild cam kit.
Understanding Mild Cam Profiles
Before diving into specific kits, let's define what constitutes a "mild" cam for a 350. A mild cam offers a noticeable performance increase without sacrificing drivability. Key characteristics include:
- Moderate Lift: Generally under .500" of lift. Higher lift increases power but can require more aggressive valve springs and other modifications.
- Moderate Duration: Duration, measured in degrees, refers to how long the valve stays open. A mild cam will have a duration in the low to mid-200s (at .050" lift). Longer duration cams provide more power at higher RPMs but reduce low-end torque.
- Street-Friendly Idle: A mild cam will maintain a relatively smooth, manageable idle quality, even at lower RPMs. This is crucial for daily driving.
Choosing the Right Chevy 350 Mild Cam Kit
The ideal cam kit depends heavily on your intended use and the overall build of your engine. Consider these factors:
1. Your Driving Style and Vehicle Application:
- Daily Driver: Prioritize street manners and low-end torque. A smaller duration and lift will be best.
- Weekend Cruiser/Muscle Car: You can opt for a slightly more aggressive cam with increased lift and duration for improved horsepower throughout the RPM range.
- Off-Road Vehicle: A cam with strong low-end torque is crucial for pulling power in challenging terrain.
2. Engine Modifications:
- Stock Engine: A mild cam is a great starting point for a stock 350. However, ensure the camshaft is compatible with your existing components.
- Modified Engine: If you've upgraded other components (headers, intake manifold, carburetor), you might consider a slightly more aggressive cam to complement these modifications.
3. Kit Components:
A complete cam kit typically includes:
- Camshaft: The heart of the upgrade.
- Lifters: Hydraulic or mechanical, depending on the camshaft design.
- Timing Chain or Gears: Essential for proper camshaft timing.
- Pushrods: Transfer the motion from the lifters to the rocker arms.
Installation Considerations:
Installing a camshaft is a significant undertaking requiring mechanical aptitude. If you're not comfortable performing this type of work, it's best to seek professional assistance. However, if you're experienced, here's a brief overview:
- Proper Tools: Ensure you have the necessary tools, including a timing chain or gear set, torque wrench, and valve spring compressor.
- Engine Timing: Accurate timing is critical for proper engine operation. Consult your camshaft kit's instructions and a reliable engine timing guide.
- Break-in Period: New camshafts require a break-in period to allow the components to wear in properly. Follow the manufacturer's break-in procedure carefully.
Popular Chevy 350 Mild Cam Kit Brands
Many reputable brands offer excellent mild cam kits for the Chevy 350. Research and compare different options based on your specific needs and budget. Don't hesitate to consult online forums and communities for recommendations and reviews.
Conclusion
Upgrading your Chevy 350 with a mild cam kit is a rewarding experience, offering noticeable performance gains without sacrificing daily drivability. By carefully considering your needs, choosing the right kit, and following proper installation procedures, you can unlock the true potential of your classic engine. Remember to always prioritize safety and consult professional resources if you need assistance.
