In article ,
Morgans wrote:
...snipped...

Add to that, that the makers of rotors for the Detroit iron used to age each
rotor, for up to a year before they put the factory turning on it and
shipped it out. That is the primary reason they used to hardly ever warp,
and if they did, not so badly. Do you think the Chinese age their cast iron
for a year? Nope.

Speaking from 34 years professional experience in fleet vehicle maintenance
I would seriously doubt that assertion.



--
Better to be stuck up in a tree than tied to one.

Larry W. - Baltimore Maryland - lwasserm(a)sdf. lonestar.org