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Old 09-22-2019, 12:11 PM   #5
Jim Brierley
Senior Member
 
Join Date: Jun 2010
Location: Temecula, CA
Posts: 4,092
Default Re: How to check a Model B Cam?

As John says, I do regrinds. I suggest 1.556" as a minimum bearing size, the center brg. is the most likely to wear. B cams came in .305", 319" and 339" lifts. Some were copper plated, some not. That is for heat rejection in the heat-treating of the cam, means nothing if going to be re-ground. B tappets are larger than A's, a good thing. They can be re-surfaced if needed too. e-mail me at jimb4e4@gmail if interested. The nose of the cam often wears, and the area where the gear attaches is sometimes buggered, these will be corrected before re-grinding. Measuring lift as railcar suggests works on stock cams but not necessarily on performance grinds.
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