[Chris Hill]

When I was at Eaton and we wanted to do the same thing, we actually tig welded the lobes instead of spray welded then grinded on it. I'm not sure what the rod was or the cam material. This was not converting from flat tappet to rollers though.

The camshaft was an old Ducati (sp?) and parts were not available and it did run afterwards, but not in a racing enviroment.

I may be mistaken, but I'm not aware of a spray metal weld that has ever been used in an actual strenght application like a camshaft. Most time I've heard of it used is to repair seal areas on shafts or to reman a turbine shroud housing.