Katech LS7 / LS3 416ci Track Attack Camshaft

Katech LS7 / LS3 416ci Track Attack Camshaft

Maximum-Effort Competition Performance for LS7 and LS3-Based 416ci Builds, with the Ability to Be Street Driven.

The Katech LS7 / LS3 416ci Track Attack Camshaft is a maximum-effort hydraulic roller camshaft designed for all-out competition use with the ability to be street driven. Applications include LS7 and appropriately configured LS3-based 416ci engine builds.

Specifications include 247°/261° duration at .050", .670"/.670" valve lift with a 1.80:1 rocker ratio, a 112° lobe separation angle, and +2° camshaft advance. Actual valve lift depends on the rocker ratio used in the completed engine.

In an appropriately configured LS7 combination using Katech CNC-ported LS7 cylinder heads, a free-flowing exhaust, an appropriate intake manifold, and supporting calibration, the Katech LS7 / LS3 416ci Track Attack Camshaft is designed to support a 600 rear-wheel horsepower target. A customer vehicle produced a reported 616 RWHP with this profile.

With an experienced calibrator and a carefully matched engine combination, the Katech LS7 / LS3 416ci Track Attack Camshaft can provide very good street manners for a camshaft of this size. This profile was featured in Abel Chevrolet's Optima Street Car Challenge vehicle.

Piston-to-valve clearance must be checked during installation. Forged pistons with larger valve reliefs are highly recommended.

Features & Benefits

• Maximum-Effort Competition Application: Designed for All-Out Performance with the Ability to Be Street Driven
• LS7 & LS3 416ci Fitment: For Appropriately Configured Engine and Valvetrain Combinations
• Strong Mid-Range & Very Strong Top-End Performance: Developed for Demanding Competition Builds
• 600 RWHP Target: With Katech CNC-Ported LS7 Cylinder Heads, Supporting Intake, Exhaust, and Calibration
• Reported Customer Result: 616 RWHP in a Customer Vehicle
• 247°/261° Duration at .050": Intake and Exhaust Duration Specifications
• .670"/.670" Valve Lift: Specified with a 1.80:1 Rocker Ratio
• 112° Lobe Separation Angle: With +2° Specified Camshaft Advance
• Spintron Validation: Valvetrain Validation to 8,000 RPM in the Associated Test Combination
• Competition Use: Featured in Abel Chevrolet's Optima Street Car Challenge Vehicle

Performance Characteristics

Reported LS7 Performance Combinations

Reported horsepower, torque, and quarter-mile figures apply to specific supporting combinations. Actual results depend on the complete engine, vehicle, calibration, fuel, and testing conditions. LS7 results should not be assumed to apply directly to LS3-based 416ci builds.

Technical Specifications

Supporting Valvetrain

• Valves: Contact Katech Technical Sales for Katech Titanium/Molybdenum Valve Options Matched to the Cylinder Heads
• Valve Springs & Retainers: Select a Combination Approved for the Camshaft Profile, Actual Valve Lift, Installed Height, and Intended Operating Range
• Lifters: Katech Spec .8422" ± .0002" Johnson 2116 LSR LS/LT Tie-Bar Reduced Travel Hydraulic Roller Lifter Set; Confirm Suitability for the Build

Contact Katech Technical Sales to confirm the complete valvetrain combination for your LS7 or LS3-based 416ci engine.

Fitment

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

Piston-to-valve clearance must be checked. Forged pistons with larger valve reliefs are highly recommended.

Valve Lift: The listed .670"/.670" 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 compatibility and supporting component requirements before ordering.

Important Installation Notes

• Piston-to-Valve Clearance: Must Be Checked for the Completed Engine Combination
• Piston Selection: Forged Pistons with Larger Valve Reliefs Are Highly Recommended
• Camshaft Timing: Verify Installed Timing Against the Cam Card
• Rocker Ratio: Confirm Actual Valve Lift for the Rocker Ratio Used
• Valve Springs: Verify Suitability for the Camshaft Profile and Actual Valve Lift
• Valvetrain Clearances: Verify 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: An Experienced Calibrator Is Recommended to Match the Camshaft and Supporting 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 Track Attack Camshaft and the supporting components appropriate for your competition engine build.

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