What supporting modifications are needed for this camshaft?

To achieve optimal performance, COMP Cams recommends a minimum of 9:1 compression, a torque converter with a 2500 RPM stall speed or higher, an upgraded intake manifold, proper gearing, and performance headers. These components help the camshaft operate effectively.

What kind of idle can I expect with this camshaft?

This is a performance camshaft designed for street/strip use, and it will produce a noticeable, rough idle. This characteristic is often desired by enthusiasts looking for a more aggressive engine sound and feel.

Is this camshaft compatible with all Ford 429 and 460 engines?

This camshaft is specifically designed for Ford 429 and 460 Big Block engines from the 385 series. While it fits many vehicles from 1968-1978, it's always best to verify your specific engine's compatibility before installation.

COMP Cams Hydraulic Roller Camshaft 34-601-9

Name: COMP Cams Camshaft FF 291Th R7 Thumper
Brand: COMP Cams
Price: 604.45 USD
Availability: InStock

COMP Cams Camshaft FF 291Th R7 Thumper

$604.45

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Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

COMP Cams Mutha' Thumpr hydraulic roller camshaft for Ford 429 and 460 Big Block engines. Requires supporting modifications for optimal performance.

Key Features

Fits Ford Big Block/385 Series 429 and 460 engines.
Hydraulic roller camshaft design.
Intake duration at .050 inch lift: 235 degrees.
Exhaust duration at .050 inch lift: 249 degrees.
Requires 9:1 compression ratio or higher.
Requires a 2500+ RPM stall speed torque converter.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

This COMP Cams Mutha' Thumpr camshaft features a 235/249 degree duration at .050 inch lift, a design choice that helps it make serious power on the street and at the strip. It's built for Ford's robust 429 and 460 Big Block engines, commonly found in vehicles like the Ford LTD, Mercury Marquis, and Lincoln Continental from the late 60s through the late 70s. This camshaft is designed to give your engine a noticeable, rough idle that signals its performance intent.

To get the most out of this high-performance camshaft, you'll need to ensure your engine is properly set up. COMP Cams recommends a minimum of 9:1 compression ratio, a torque converter with a 2500 RPM stall speed or higher, and supporting modifications like an upgraded intake manifold, proper gearing, and performance headers. Without these components, the camshaft won't be able to breathe and operate at its full potential, and you won't achieve the improved performance it's capable of.

This is a hydraulic roller camshaft, which generally offers less friction and better performance than flat tappet designs. It's a significant upgrade for anyone looking to build a powerful street/strip engine. Keep in mind that this camshaft is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper setup and break-in procedures.