Katech LS7 / LS3 416ci All-Day Camshaft

Katech LS7 / LS3 416ci All-Day Camshaft

Strong Mid-Range and Top-End Performance with Excellent Street Manners for LS7 and LS3-Based 416ci Builds.

The Katech LS7 / LS3 416ci All-Day Camshaft is a hydraulic roller camshaft for LS7 and appropriately configured LS3-based 416ci engine builds. Using Katech's revised smooth lobe design, this profile is developed to increase top-end performance without sacrificing bottom-end power compared with the Katech LS7 Torquer 110 Camshaft and Katech LS7 Torquer 116 Camshaft in the intended LS7 combination.

Designed to fit a stock-bottom-end LS7, the Katech LS7 / LS3 416ci All-Day Camshaft features 232°/246° duration at .050", a 114° lobe separation angle, and +3° camshaft advance. Valve lift is .651"/.658" with a 1.80:1 rocker ratio. Actual valve lift depends on the rocker ratio used in the completed engine.

The stated LS7 powerband is 3,000–7,000 RPM, with very strong mid-range and top-end performance. Power delivery, driveability, and operating range in an LS3-based 416ci build depend on the engine configuration and supporting components.

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 All-Day Camshaft has the potential to produce 575+ rear-wheel horsepower. Katech's supplied LS7 performance figure on 93 octane is 645 HP with MSD. Actual output depends on the complete engine and vehicle combination and testing conditions.

Katech's LS7 valvetrain development includes Spintron validation to 8,000 RPM with the associated test combination. This validation speed is separate from the stated powerband and 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
• Stock-Bottom-End LS7 Fitment: Designed for LS7 Builds Retaining the Stock Bottom End, with Piston-to-Valve Clearance Verification
• Revised Smooth Lobe Design: Part of Katech's LS7 Camshaft Development
• Excellent Street Manners: With an Appropriately Matched Engine Combination and Calibration
• Strong Mid-Range & Top-End Performance: Stated LS7 Powerband of 3,000–7,000 RPM
• Torquer Profile Comparison: Developed to Increase Top-End Power without Losing Bottom-End Power Compared with the Katech LS7 Torquer 110 Camshaft and Katech LS7 Torquer 116 Camshaft
• 575+ RWHP Potential: In an Ideal LS7 Combination with Katech CNC-Ported Heads, Supporting Intake, Exhaust, and Calibration
• 232°/246° Duration at .050": Intake and Exhaust Duration Specifications
• .651"/.658" Valve Lift: Specified with a 1.80:1 Rocker Ratio
• 114° Lobe Separation Angle: With +3° Specified Camshaft Advance
• 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: PSI1511 Valve Springs
• Lifters: Johnson 2110-K 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 All-Day Camshaft was designed to fit a stock-bottom-end LS7 and is also suitable for appropriately configured LS3-based 416ci builds. Verify piston-to-valve clearance in either application.

Valve Lift: The listed .651"/.658" 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: Check During Installation on Both LS7 and LS3-Based 416ci Builds
• 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
• Supporting Components: Match Cylinder Heads, Intake, Exhaust, and Fuel System Components to the Performance Goal
• ECU Calibration: Match the Calibration to the Katech LS7 / LS3 416ci All-Day Camshaft and Supporting Engine Components
• Professional Installation: Recommended for Proper Setup and Verification

Why Choose Katech

Katech has been involved in the racing industry since 1977, with engine development experience that includes the Corvette C5-R race program. That heritage informs our approach to performance camshaft and valvetrain development.

Our Optron Spin Cell technology allows Katech engineers to analyze valve motion during operation and evaluate valvetrain control. This development process helps guide camshaft and component combinations with power and durability in mind.

Contact Katech Technical Sales to discuss the Katech LS7 / LS3 416ci All-Day Camshaft and the supporting components appropriate for your LS7 or LS3-based 416ci engine build.

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