The CNC camshaft grinding procedure used by Comp Cams has undergone significant upgrades. In order to further increase the longevity and durability of camshafts, the company has now incorporated what it terms its “Micro Surface Enhancement” finishing technology. This technique works in conjunction with its improved grinding process.

The last machining step that completes an engine’s camshaft frequently consists of grinding the lobes and bearing journals. This is still the case for some products made by Comp Cams, a top producer of aftermarket camshafts and valvetrain parts for race, show, and street cars.

Over the years, the Memphis, Tennessee-based company has continued to adopt new grinding technology, and as a result, it now has nine computer numerical control (CNC) grinding machines that use wheels made of cubic boron nitride (CBN) with carbon fiber hubs that are profiled and trued on the machines using rotary diamond wheel dressers. For one of its most popular roller-lifter camshaft lines, it also just unveiled a new lobe and bearing-journal polishing technique that not only improves the appearance of the camshafts but also lengthens their lives by decreasing aberrant, Pʀᴇᴍᴀᴛᴜʀᴇ lobe wear.

This is accomplished by the kinetic finishing procedure by eliminating minute material peaks left over from grinding and reducing the amount of side-to-side waviness across the surface of a camshaft lobe, thereby increasing the effective surface-bearing area between a lobe and its corresponding lifter’s roller. As a result, the camshaft lobes encounter less localized stress during operation, which reduces the likelihood of small flaws spreading to cause problems on a larger scale.

Comp Cams supplies roller-lifter camshafts for popular General Motors LS engines (launched in 1995 for usage in a range of rear-wheel-drive vehicles) as well as custom racing applications for an additional fee. Comp Cams refers to this finishing technique as Micro Surface Enhancement (MSE).

Nevertheless, MSE did not prove to be a panacea. The company thought it made sense to go back and further improve its grinding process after creating and perfecting the MSE process in order to provide a superior overall camshaft lobe surface profile and polish and to leverage the advantages that MSE offered.

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Video resource: MI Mechanics