Are COMP CAMS camshafts and CRANE CAMS camshafts (flat tappet here) made from the same base stock? I thought I read some where that COMPS were cast iron and CRANES were steel. Can anyone shed some light on this for me? Agian, just flat tappet cams here.

 

No, the standard product lines of both of those companies (and others I have personal experience with such as Lunati and Ultradyne and formerly Cam Dynamics) are all ground on cast iron blanks that come from any of several sources available to them all, such as Elgin. There are only a handful of cam blank companies with an acceptable quality product, and the majors all use them.

If you use a steel flat-tappet cam you have to use a different lifter material. One of the 2 parts has to be softer than the other. I don't know off the top of my head what Crane calls their lifters for billet cams, Comp calls them "chilled iron" and the part #s used to have CI at the end. They may still, I haven't looked lately. If you use regular (steel) lifters on a steel cam, you will have nothing left but metal filings within a couple of hours of operation.

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Thanks again for your insight RB. I appreciate it.