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Cam Theory 1800

posted by  CyaLater on  Wed Feb 23 01:16 CST 2005
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http://www.textron.com/textron_businesses/industrial/kautex_products.jsp
CWC-Textron make just about every iron camshaft on the planet. I don't know what CWC stands for, it could be just three guys names like TRW for all I know.

A billet is a semi finished cam, the bearing surfaces, pump encentric & snout taper/key/threads are finished, but the lobes are 'as cast' & only vaguely look like a lobe. Cam companies & car manufacturers by these billets & grind the profile on them.

When CWC improved the billet they do so by making the lobes narrower than the original & better placed relative to the lifter bore. The old lobes were so wide that once they wore down a little they would touch the lifter at both ends of the taper & then stop spinning. You can rescue an old cam by narrowing the lobes to a more sensible width.





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