Katech LS7 / LS3 416ci K502 Camshaft

Katech LS7 / LS3 416ci K502 Camshaft

High-RPM Street Performance for LS7 and LS3-Based 416ci Builds, with Katech's Revised Smooth Lobe Design.

The Katech LS7 / LS3 416ci K502 Camshaft is an improved version of the Katech LS7 K501 Camshaft, developed for high-RPM street performance. Its revised smooth lobe design improves street manners and increases top-end performance without sacrificing bottom-end power compared with the Katech LS7 K501 Camshaft in the intended LS7 combination.

This hydraulic roller camshaft is suitable for LS7 and appropriately configured LS3-based 416ci engine builds. Specifications include 243°/257° duration at .050", a 113° lobe separation angle, and +3° camshaft advance. Valve lift is .650"/.650" with a 1.80:1 rocker ratio. Actual valve lift depends on the rocker ratio used in the completed engine.

The Katech LS7 / LS3 416ci K502 Camshaft provides strong mid-range and top-end performance in an appropriately matched LS7 combination. Power delivery, driveability, and operating range depend on displacement, compression ratio, cylinder heads, intake and exhaust systems, supporting valvetrain components, and calibration.

In an ideal LS7 vehicle combination using Katech CNC-ported LS7 cylinder heads, a free-flowing exhaust, an appropriate intake manifold, and supporting calibration, the Katech LS7 / LS3 416ci K502 Camshaft has the potential to produce 600 rear-wheel horsepower. Katech's supplied LS7 performance figures on 93 octane are 670 HP and 588 ft-lbs with MSD. Actual output depends on the complete engine and vehicle combination and testing conditions.

The Katech LS7 / LS3 416ci K502 Camshaft was designed to fit a stock-bottom-end LS7 with no cylinder head decking. Piston-to-valve clearance should be verified during installation in both LS7 and LS3-based 416ci builds, particularly when cylinder heads have been decked or thinner head gaskets are used.

Katech's LS7 valvetrain development includes Spintron validation to 8,000 RPM with the associated test combination. This validation speed does not establish an 8,000 RPM operating limit for every LS7 or LS3-based 416ci build.

Features & Benefits

• LS7 & LS3 416ci Applications: Suitable for LS7 and Appropriately Configured LS3-Based 416ci Engine Builds
• High-RPM Street Performance: Developed for Carefully Matched Engine and Valvetrain Combinations
• Revised Smooth Lobe Design: An Evolution of the Katech LS7 K501 Camshaft Profile
• Improved Street Manners: Compared with the Katech LS7 K501 Camshaft in the Intended LS7 Combination
• Increased Top-End Performance: Developed without Sacrificing Bottom-End Power Compared with the Katech LS7 K501 Camshaft
• 600 RWHP Potential: In an Ideal LS7 Combination with Katech CNC-Ported Heads, Supporting Intake, Exhaust, and Calibration
• 243°/257° Duration at .050": Intake and Exhaust Duration Specifications
• .650"/.650" Valve Lift: Specified with a 1.80:1 Rocker Ratio
• 113° Lobe Separation Angle: With +3° Specified Camshaft Advance
• Stock-Bottom-End LS7 Design: Developed for Undecked Cylinder Heads, with Clearance Verification During Installation
• Spintron Validation: LS7 Valvetrain Validation to 8,000 RPM in the Associated Test Combination

Performance Characteristics

The reported LS7 performance figures should not be assumed to apply directly to LS3-based 416ci builds.

Technical Specifications

Suggested Valvetrain

Katech's suggested LS7 valvetrain combination includes:

• Valves: Katech Titanium/Molybdenum Valves
• Valve Springs: PSI1516 Valve Springs
• Lifters: Johnson 2116 Lifters
• Spring Locators: Katech Spring Locators
• Retainers: Katech Tool Steel or Titanium Valve Spring Retainers

For LS3-based 416ci builds, contact Katech Technical Sales for components matched to the cylinder heads, rocker ratio, and engine configuration. Confirm the specific valve and valvetrain products appropriate for either application.

Fitment

Chevrolet / General Motors: LS7 and LS3-Based 416ci Engine Builds.

The Katech LS7 / LS3 416ci K502 Camshaft was designed to fit a stock-bottom-end LS7 with no cylinder head decking and is also suitable for appropriately configured LS3-based 416ci builds.

Verify piston-to-valve clearance in either application, particularly with decked cylinder heads or thinner head gaskets.

Valve Lift: The listed .650"/.650" valve lift is based on a 1.80:1 rocker ratio. Actual valve lift depends on the rocker ratio used.

Contact Katech Technical Sales to confirm supporting valvetrain components for your specific engine combination.

Important Installation Notes

• Piston-to-Valve Clearance: Verify for Both LS7 and LS3-Based 416ci Builds
• Cylinder Head Decking: Changes to Cylinder Head Deck Height Require Particular Attention to Piston-to-Valve Clearance
• Head Gasket Thickness: Thinner Head Gaskets Require Clearance Verification
• Camshaft Timing: Verify Installed Timing Against the Cam Card
• Rocker Ratio: Confirm Actual Valve Lift for the Rocker Ratio Used
• Valvetrain Setup: Verify Valve Spring Suitability, Installed Height, Coil Bind Clearance, and Retainer-to-Seal Clearance
• Pushrod Length & Lifter Preload: Verify During Installation
• RPM Limit: Select for the Complete Engine and Valvetrain Combination
• ECU Calibration: Match the Calibration to the Katech LS7 / LS3 416ci K502 Camshaft and Supporting Engine Components
• Professional Installation: Recommended for Proper Setup and Verification

Why Choose Katech

The Katech LS7 / LS3 416ci K502 Camshaft reflects Katech's continued development of the LS7 platform. Building on the Katech LS7 K501 Camshaft, the revised smooth lobe design addresses how the engine performs on the street while extending its top-end capability.

Katech evaluates valve motion using Optron Spin Cell technology, helping engineers assess the camshaft and supporting valvetrain as a working combination. For the Katech LS7 / LS3 416ci K502 Camshaft, that development is supported by LS7 performance results and valvetrain validation to 8,000 RPM with the associated test setup.

From a stock-bottom-end LS7 to an LS3-based 416ci build, Katech Technical Sales can help match the Katech LS7 / LS3 416ci K502 Camshaft to the cylinder heads, rocker ratio, and supporting components your engine requires.

NOTE: The image shown is for illustrative purposes only and may not be an exact representation of the actual product.