Before I was using JS cams, I was using a PW3, never a problem with it till the day, at a drag race, the PW3 broke in two pieces
Yves
All the chilled cast cams will have come from 1 source.
http://www.newman-cams.com
So it's either a batch issue or chilled cast iron is not suitable for the application.
Newmans no longer list PW3
Because only Hemmings (now AN) and Norman White are official retailers as I understand it. Newman’s make them though.
there's plenty of reports of PW3 cams lasting forever.