Katech LS7 / LS3 416ci Touring Camshaft

Katech LS7 / LS3 416ci Touring Camshaft

Excellent Street Manners, Strong Low-to-Mid-Range Performance, and Improved Top-End Power for LS7 and LS3-Based 416ci Builds.

The Katech LS7 / LS3 416ci Touring Camshaft is a hydraulic roller camshaft for LS7 and LS3-based 416ci engine builds. Featuring Katech's revised smooth lobe design, this profile is developed to increase top-end power without sacrificing bottom-end performance compared with the Katech Torquer 110 and Torquer 116 camshafts, while improving driveability.

Designed to fit a stock-bottom-end LS7, the Katech LS7 / LS3 416ci Touring Camshaft features 227°/245° duration at .050", a 116.5° lobe separation angle, and +4.5° camshaft advance. Valve lift is .630"/.630" 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 low-to-mid-range performance and improved top-end power. Power delivery 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, this camshaft has the potential to produce 560+ rear-wheel horsepower. Katech's supplied LS7 performance figures on 93 octane are 660 HP with MSD/103 and 560 RWHP. Actual output depends on the complete engine and vehicle combination and testing conditions.

Katech's LS7 valvetrain development includes Spintron validation to 9,500 RPM with the associated test combination. This validation speed is separate from the stated powerband and does not establish a 9,500 RPM operating limit for a stock-bottom-end LS7 or an 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
• Improved Driveability: Compared with Katech Torquer 110 and Torquer 116 Camshafts
• Strong Low-to-Mid-Range Performance: With Improved Top-End Power in the Intended LS7 Combination
• 560+ RWHP Potential: In an Ideal LS7 Combination with Katech CNC-Ported Heads, Supporting Intake, Exhaust, and Calibration
• 227°/245° Duration at .050": Intake and Exhaust Duration Specifications
• .630"/.630" Valve Lift: Specified with a 1.80:1 Rocker Ratio
• 116.5° Lobe Separation Angle: With +4.5° Specified Camshaft Advance
• Spintron Validation: LS7 Valvetrain Validation to 9,500 RPM in the Associated Test Combination

Performance Characteristics

Technical Specifications

Suggested Valvetrain

Katech's suggested LS7 valvetrain combination includes:

• Valves: Katech Ti/Mo Valves
• Valve Springs: PSI1511 Valve Springs
• Lifters: Johnson 2110-K Lifters
• Spring Locators: Katech Locators
• Retainers: Katech Tool Steel or Titanium Retainers
• Pushrods: Trend 3/8" Diameter, .135" Wall Pushrods; Verify Required Length During Installation

For LS3-based 416ci builds, contact Katech Technical Sales for components matched to the cylinder heads, rocker ratio, and engine configuration.

Fitment

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

The Katech LS7 / LS3 416ci Touring 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 .630"/.630" valve lift is based on a 1.80:1 rocker ratio. Actual valve lift changes with 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; Spintron Validation to 9,500 RPM Does Not Establish a Safe Limit for Every Build
• Supporting Components: Match Cylinder Heads, Intake, Exhaust, and Fuel System Components to the Performance Goal
• ECU Calibration: Match the Calibration to the 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 Touring 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.