Upgrading to a performance camshaft is worth it for your LS engine build because it directly increases horsepower and torque by optimizing valve timing. This component dictates how the engine breathes, allowing for more efficient combustion. At Total Performance Australia, we provide the specialized camshafts needed to unlock the full potential of your LS1, LS2, or LS3 engine.

Understanding Valve Timing and Lift

A camshaft is a rotating shaft with lobes that open and close the engine's valves. The geometry of these lobes determines the duration and lift of the valves. In a stock LS engine, the camshaft is designed for low-end torque and fuel economy. A performance camshaft shifts this balance, often sacrificing some low-end idle quality for significant gains in mid-range and high-RPM power.

The primary metric to consider is cam duration. Longer duration keeps the valves open for more of the crankshaft rotation, which allows more air and fuel into the cylinder at higher speeds. This is critical for high-performance builds. If you are building a street-driven muscle car, a mild camshaft provides a noticeable improvement in throttle response without making the car difficult to drive in traffic.

Matching the Cam to Your Build

A camshaft does not work in isolation. It is the heart of the valvetrain, and its performance is limited by the components surrounding it. To get the most out of a performance cam, you must ensure your valve springs and lifters are compatible. A high-lift camshaft requires stiffer valve springs to prevent valve float at high RPMs.

Total Performance Australia stocks a wide range of LS valve springs and kits specifically designed to pair with various cam profiles. For example, if you are installing a cam with 240 degrees of duration, you need a spring that can handle the increased velocity of the valve train. Mismatching these components can lead to engine damage, so selecting the correct combination is essential for a reliable build.

Street Driveability vs. Track Performance

Modern LS engines, particularly the LS3, have a high-revving nature that benefits greatly from a mild performance upgrade. By choosing a camshaft with a moderate duration, you can maintain a usable idle while gaining 20 to 30 horsepower in the mid-range. This makes the car feel much more responsive during overtaking maneuvers. The implication is that you do not need a race-only cam to enjoy a significant performance improvement.

Fuel System and Tuning Requirements

Increasing airflow with a performance camshaft requires a corresponding increase in fuel delivery. A stock fuel system may not be able to keep up with the demands of a high-performance cam, leading to a lean condition that can damage the engine. You must ensure your fuel injectors and pump are sized correctly for the new airflow numbers.

Additionally, the engine's computer needs to be retuned. The stock calibration is optimized for the stock camshaft's timing. When you change the cam, the air-fuel mixture and ignition timing must be adjusted to match the new valve events. Total Performance Australia offers LS intake manifolds and fuel rail kits that help ensure your engine receives the correct amount of fuel and air. Proper tuning is the final step that makes the camshaft upgrade safe and effective.

Sourcing Quality LS Components

When upgrading your LS engine, the quality of the components you choose matters. Cheap, unbranded camshafts may not have the precise machining tolerances required for high-RPM reliability. Reputable manufacturers use high-quality steel and precise grinding processes to ensure the camshaft lasts for the life of the engine.

At Total Performance Australia, we are a direct dealer for top-tier performance brands. We stock LS stroker kits and crankshafts as well as the camshafts needed to complete these builds. By sourcing from a specialized retailer, you ensure that the parts you buy are compatible and of high quality. This reduces the risk of failure and ensures your investment in the build is protected.

Key Takeaways

• A performance camshaft increases horsepower by optimizing valve timing and lift.
• Cam duration is the key factor in determining whether a cam is suitable for street or track use.
• Valve springs and lifters must be upgraded to match the new camshaft profile.
• Fuel system components and engine tuning must be adjusted to handle increased airflow.
• Quality matters; choose reputable brands to ensure reliability and longevity.
• Total Performance Australia provides the complete range of LS parts needed for a successful cam upgrade.

Frequently Asked Questions

Will a performance camshaft make my LS engine harder to start?

Generally, no. Modern LS engines with electronic fuel injection start reliably even with aggressive camshafts. However, very high-duration race cams may have a rougher idle, which can be mistaken for starting issues, but the engine will still crank and start normally.

Do I need to change my valve springs if I install a new cam?

Yes, in most cases. A performance camshaft usually has more lift than the stock cam. This requires stiffer valve springs to keep the valves seated at high RPMs. Failing to upgrade the springs can lead to valve float and engine damage.

Can I use a performance cam in a stock LS engine?

You can, but you must be careful. A mild performance cam can work in a stock engine, but you should verify that the stock valve springs and lifters are compatible with the new cam's lift and duration. A full valvetrain upgrade is recommended for best results.

How much horsepower can I expect from a camshaft upgrade?

The gain depends on the rest of the engine. A mild cam on a stock LS might add 15 to 25 horsepower. A more aggressive cam on a built engine with a larger intake and exhaust can add 50 to 100 horsepower or more.

Where can I buy LS camshafts in Australia?

You can buy LS camshafts from Total Performance Australia. We stock a wide range of camshafts for LS1, LS2, and LS3 engines, along with the necessary valve springs and lifters to complete your build.

Conclusion

Upgrading to a performance camshaft is one of the most effective ways to improve your LS engine's performance. It is a cost-effective modification that provides a significant power gain. By understanding the relationship between the camshaft, valve springs, and fuel system, you can build a reliable and powerful engine. Total Performance Australia is your trusted source for high-quality LS engine parts in Australia. Visit our website to explore our range of camshafts and valvetrain components today.