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Tag Archives: Camshaft

Camshaft Heat Treatment Explained

The shallower dimple in the outer surface shows the hardening properties of the induction hardening process. A diamond tip with a Rockwell C load was used on each.

We’ve all heard the term, but have you ever wondered what that heat treatment actually looks like, or how it’s done? Well, you are in luck. Heat-treating a camshaft ensures the lobes will hold up under the demands of the valve train. Pushrods can apply as much as 2,000- to 6,000-lb loads between the lobe and roller wheels in a ... Read More »

COMP Cams GM Sportsman Tool Steel Camshafts Offer Strength, Flexible Profiles

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Custom GM Sportsman Tool Steel Camshafts from COMP Cams feature core technology widely used in NASCAR, NHRA and other professional race engines for its high strength and profile flexibility. Special ST4 grade tool steel is available only from COMP Cams and 30 percent stronger than SAE 5150 or SAE 8620 options. Due to its higher carbon content, it has been shown to ... Read More »

Top 10 Cam Failure Culprits

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Cams, cams, cams.. While camshafts can and do “go out,” something other than a bad core more often than not is to blame. Below are 10 things to think about before calling foul on your cam. COIL BIND Coil bind is when a spring compresses solid before or during full camshaft lift. This stack of metal stops the valve train ... Read More »

Low Buck DIY: LT1 Adjustable Cam Gear

We chucked up our trusty .350 bit and made our way through the metal, slotting the holes.

When upgrading our LT1 to an LS1-style ignition with the bolt-on kit from EFI Connection, we began installing our camshaft from COMP Cams with the factory cam gear. We found our Top Dead Center and then our Intake Lobe Centerline. To meet our desired 111 degree intake centerline, the cam core was ground at 115 degree lobe separation angle with ... Read More »

Finding the Intake Lobe Centerline

Step 3: Roll the cam backward until the gauge reads .50 lift before max lift and take a degree reading from the cam wheel.

Finding the Intake Lobe Centerline is essential to degree a camshaft, and it’s easy. See our Finding Top Dead Center article to learn how to set up the degree wheel. Read More »

Finding Top Dead Center

Step 4: Remove the piston stop and roll the engine back around until the pointer hits zero. This is your Top Dead Center.

Finding Top Dead Center on an engine is a four-step process made easy with a piston stop and a degree wheel.   Read More »

All About That Base Circle

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Of all the things I do here at COMP Cams, nothing gives me more satisfaction than helping a customer achieve success with an engine building project.  Sometimes I get the call when the project is in the idea stage, or often, the customer has already purchased a few parts such as block, crank, head castings, etc. One area I feel ... Read More »

COMP’s Thumpr Camshafts For Old-School Street Rod Engines

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Memphis, TN – Thumpr Cams are designed to provide outstanding sound matched with unbeatable performance.  They are available from COMP Cams for a wide range of engine applications, including the most popular power plants for street rods. Featuring specially engineered profiles for each unique engine, Thumpr Camshafts provide the perfect combination of early intake valve opening and long exhaust duration, ... Read More »

Roll With It – Convert a Flat Tappet Camshaft to a Roller

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Converting A Tried-and-True Small Block Chevy from a Flat Tappet to a Roller Camshaft Words and photos: Tommy Lee Byrd There aren’t many cutting edge ideas associated with the small block Chevy, as it’s been in the hot rod rotation for 60 years now. However, it still stands at the most popular engine platform, whether you’re dealing with a street ... Read More »